{"id":40159,"date":"2025-05-28T08:46:16","date_gmt":"2025-05-28T00:46:16","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/40159.html"},"modified":"2025-05-28T08:46:16","modified_gmt":"2025-05-28T00:46:16","slug":"android%e5%ae%a2%e6%88%b7%e7%ab%af%e4%b8%8e%e6%9c%8d%e5%8a%a1%e5%99%a8json%e6%95%b0%e6%8d%ae%e4%ba%a4%e4%ba%92%e5%ae%8c%e6%95%b4demo","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/40159.html","title":{"rendered":"Android\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668JSON\u6570\u636e\u4ea4\u4e92\u5b8c\u6574Demo"},"content":{"rendered":"

\u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90，\u70b9\u51fb\u83b7\u53d6 \"menu-r.4af5f7ec.gif\" <\/p>\n

\u7b80\u4ecb：\u672cdemo\u6f14\u793a\u4e86Android\u624b\u673a\u5ba2\u6237\u7aef\u5982\u4f55\u901a\u8fc7WiFi\u8fde\u63a5\u670d\u52a1\u5668\u7aef\u83b7\u53d6JSON\u6570\u636e\u3002\u4ecb\u7ecd\u4e86\u7f51\u7edc\u8bbf\u95ee\u6743\u9650\u7684\u8bbe\u7f6e\u3001\u4f7f\u7528HttpURLConnection\u53d1\u8d77HTTP\u8bf7\u6c42\u3001\u91c7\u7528Gson\u5e93\u8fdb\u884cJSON\u89e3\u6790，\u5e76\u4ee5Servlet\u6280\u672f\u5728\u670d\u52a1\u5668\u7aef\u54cd\u5e94\u8bf7\u6c42\u3002\u901a\u8fc7\u8fd9\u4e2a\u793a\u4f8b，\u5f00\u53d1\u8005\u53ef\u4ee5\u5b66\u4e60Android\u4e0e\u540e\u7aef\u670d\u52a1\u4e4b\u95f4\u6570\u636e\u4ea4\u6362\u7684\u8fc7\u7a0b，\u4e86\u89e3\u5982\u4f55\u4f7f\u7528\u73b0\u4ee3\u7f16\u7a0b\u8bed\u8a00\u89e3\u6790JSON，\u4ee5\u53ca\u5982\u4f55\u5728Android\u5ba2\u6237\u7aef\u5904\u7406\u548c\u663e\u793a\u89e3\u6790\u540e\u7684\u6570\u636e\u3002 \"android\u624b\u673a\u5ba2\u6237\u7aef\u83b7\u53d6\u670d\u52a1\u5668\u7aef\u7684json\u6570\u636e\u7684demo\" <\/p>\n

1. Android\u5ba2\u6237\u7aef\u83b7\u53d6JSON\u6570\u636e\u6d41\u7a0b <\/h2>\n

\u5728\u79fb\u52a8\u5e94\u7528\u5f00\u53d1\u7684\u4e16\u754c\u4e2d，\u6570\u636e\u662f\u9a71\u52a8\u5e94\u7528\u8fd0\u884c\u7684\u6838\u5fc3\u3002\u5bf9\u4e8eAndroid\u5f00\u53d1\u8005\u6765\u8bf4，\u638c\u63e1\u5982\u4f55\u6709\u6548\u5730\u4e0e\u670d\u52a1\u5668\u4ea4\u6362\u6570\u636e\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002JSON\u4f5c\u4e3a\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u6570\u636e\u4ea4\u6362\u683c\u5f0f，\u5728\u79fb\u52a8\u4e92\u8054\u7f51\u5e94\u7528\u4e2d\u88ab\u5e7f\u6cdb\u4f7f\u7528\u3002\u5b83\u6613\u4e8e\u9605\u8bfb\u548c\u7f16\u5199，\u540c\u65f6\u4e5f\u6613\u4e8e\u673a\u5668\u89e3\u6790\u548c\u751f\u6210\u3002\u5728\u672c\u7ae0\u4e2d，\u6211\u4eec\u5c06\u63a2\u8ba8Android\u5ba2\u6237\u7aef\u5982\u4f55\u83b7\u53d6JSON\u6570\u636e\u7684\u6d41\u7a0b，\u8fd9\u6d89\u53ca\u4e0e\u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1\u3001\u89e3\u6790\u8fd4\u56de\u7684\u6570\u636e，\u4ee5\u53ca\u6700\u7ec8\u5c06\u6570\u636e\u5c55\u793a\u7ed9\u7528\u6237\u3002\u6211\u4eec\u5c06\u4eceJSON\u6570\u636e\u683c\u5f0f\u7684\u91cd\u8981\u6027\u5f00\u59cb，\u4e86\u89e3\u5b83\u4e3a\u4ec0\u4e48\u6210\u4e3aAndroid\u5e94\u7528\u4e2d\u6570\u636e\u4ea4\u6362\u7684\u9996\u9009\u683c\u5f0f，\u5e76\u4e14\u901a\u8fc7\u5b9e\u4f8b\u6f14\u793a\u5982\u4f55\u5728Android\u5ba2\u6237\u7aef\u53d1\u8d77\u6570\u636e\u8bf7\u6c42，\u4e3a\u540e\u6587\u4e2d\u7684\u7f51\u7edc\u8bf7\u6c42\u7ec6\u8282\u4e0e\u6570\u636e\u89e3\u6790\u6253\u4e0b\u57fa\u7840\u3002 <\/p>\n

2. \u7f51\u7edc\u6743\u9650\u8bbe\u7f6e\u4e0e\u7f51\u7edc\u8bf7\u6c42\u53d1\u8d77 <\/h2>\n

2.1 Android\u7f51\u7edc\u6743\u9650\u914d\u7f6e <\/h3>\n

2.1.1 \u6743\u9650\u8bf7\u6c42\u7684\u5fc5\u8981\u6027\u4e0e\u914d\u7f6e\u65b9\u6cd5 <\/h4>\n

Android\u5e94\u7528\u5728\u8fdb\u884c\u7f51\u7edc\u901a\u4fe1\u65f6，\u9700\u8981\u58f0\u660e\u76f8\u5e94\u7684\u7f51\u7edc\u6743\u9650，\u4ee5\u5141\u8bb8\u5e94\u7528\u8bbf\u95ee\u7f51\u7edc\u8d44\u6e90\u3002\u4eceAndroid 6.0（API\u7ea7\u522b23）\u5f00\u59cb，\u5bf9\u4e8e\u654f\u611f\u6743\u9650，Android\u5f15\u5165\u4e86\u8fd0\u884c\u65f6\u6743\u9650\u6a21\u578b，\u8981\u6c42\u5e94\u7528\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u8bf7\u6c42\u6743\u9650\u3002\u8fd9\u610f\u5473\u7740，\u9664\u4e86\u5728 AndroidManifest.xml \u6587\u4ef6\u4e2d\u58f0\u660e\u6743\u9650\u4e4b\u5916，\u5e94\u7528\u8fd8\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u8bf7\u6c42\u8fd9\u4e9b\u6743\u9650，\u5e76\u5904\u7406\u7528\u6237\u6388\u6743\u6216\u62d2\u7edd\u7684\u60c5\u51b5\u3002 <\/p>\n

\u4ee5\u4e0b\u662f\u5982\u4f55\u5728 AndroidManifest.xml \u6587\u4ef6\u4e2d\u58f0\u660e\u4e92\u8054\u7f51\u8bbf\u95ee\u6743\u9650\u7684\u793a\u4f8b： <\/p>\n

<uses-permission android:name="android.permission.INTERNET" \/><\/p>\n

\u5bf9\u4e8eAndroid 6.0\u4ee5\u4e0a\u7248\u672c，\u8fd8\u9700\u8981\u5728\u8fd0\u884c\u65f6\u8bf7\u6c42\u8be5\u6743\u9650，\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4ee3\u7801\u8fdb\u884c： <\/p>\n

if (ContextCompat.checkSelfPermission(thisActivity, Manifest.permission.INTERNET) != PackageManager.PERMISSION_GRANTED) {
\n ActivityCompat.requestPermissions(thisActivity, new String[]{Manifest.permission.INTERNET}, MY_PERMISSIONS_REQUEST_INTERNET);
\n}<\/p>\n

\u7528\u6237\u5bf9\u4e8e\u6743\u9650\u8bf7\u6c42\u7684\u54cd\u5e94\u5c06\u901a\u8fc7 onRequestPermissionsResult \u56de\u8c03\u65b9\u6cd5\u8fd4\u56de，\u5e94\u7528\u9700\u8981\u6839\u636e\u7528\u6237\u7684\u54cd\u5e94\u505a\u51fa\u76f8\u5e94\u7684\u5904\u7406\u3002 <\/p>\n

2.1.2 \u52a8\u6001\u6743\u9650\u8bf7\u6c42\u4e0e\u7528\u6237\u4ea4\u4e92 <\/h4>\n

\u52a8\u6001\u6743\u9650\u8bf7\u6c42\u6d89\u53ca\u4e0e\u7528\u6237\u7684\u76f4\u63a5\u4ea4\u4e92，\u5e94\u7528\u5fc5\u987b\u5728\u7528\u6237\u754c\u9762\u4e2d\u660e\u786e\u544a\u77e5\u7528\u6237\u8bf7\u6c42\u6743\u9650\u7684\u539f\u56e0\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u7528\u6237\u4ea4\u4e92\u793a\u4f8b，\u7528\u4e8e\u8bf7\u6c42\u7f51\u7edc\u6743\u9650： <\/p>\n

private void requestInternetPermission() {
\n if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
\n if (shouldShowRequestPermissionRationale(Manifest.permission.INTERNET)) {
\n \/\/ \u63d0\u4f9b\u7528\u6237\u6743\u9650\u88ab\u8bf7\u6c42\u7684\u7406\u7531
\n \/\/ \u53ef\u4ee5\u4f7f\u7528Toast\u63d0\u793a\u7528\u6237，\u6216\u8005\u5f39\u51fa\u5bf9\u8bdd\u6846\u8bf4\u660e\u539f\u56e0
\n }
\n requestPermissions(new String[]{Manifest.permission.INTERNET}, MY_PERMISSIONS_REQUEST_INTERNET);
\n } else {
\n \/\/ \u5bf9\u4e8e\u4f4e\u4e8eAndroid 6.0\u7684\u8bbe\u5907，\u76f4\u63a5\u58f0\u660e\u6743\u9650\u5373\u53ef
\n }
\n}<\/p>\n

@Override
\npublic void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
\n switch (requestCode) {
\n case MY_PERMISSIONS_REQUEST_INTERNET: {
\n \/\/ \u5982\u679c\u8bf7\u6c42\u88ab\u53d6\u6d88，\u5219\u7ed3\u679c\u6570\u7ec4\u4e3a\u7a7a
\n if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
\n \/\/ \u6743\u9650\u88ab\u6388\u4e88，\u53ef\u4ee5\u7ee7\u7eed\u8fdb\u884c\u7f51\u7edc\u8bf7\u6c42\u64cd\u4f5c
\n } else {
\n \/\/ \u6743\u9650\u88ab\u62d2\u7edd，\u53ef\u4ee5\u5411\u7528\u6237\u89e3\u91ca\u4e3a\u4ec0\u4e48\u9700\u8981\u8fd9\u4e9b\u6743\u9650
\n \/\/ \u5e76\u4e14\u544a\u77e5\u7528\u6237\u6ca1\u6709\u6743\u9650\u5c06\u65e0\u6cd5\u5b8c\u6210\u67d0\u4e9b\u64cd\u4f5c
\n }
\n return;
\n }
\n }
\n}<\/p>\n

\u901a\u8fc7\u4ee5\u4e0a\u4ee3\u7801，\u5f53\u5e94\u7528\u9700\u8981\u53d1\u8d77\u7f51\u7edc\u8bf7\u6c42\u65f6，\u5982\u679c\u7528\u6237\u5c1a\u672a\u6388\u4e88\u4e92\u8054\u7f51\u6743\u9650，\u5e94\u7528\u4f1a\u9996\u5148\u63d0\u793a\u7528\u6237\u4e3a\u4f55\u9700\u8981\u8be5\u6743\u9650，\u5e76\u5728\u7528\u6237\u4f5c\u51fa\u9009\u62e9\u540e，\u6839\u636e\u7528\u6237\u7684\u51b3\u5b9a\u6765\u6267\u884c\u76f8\u5e94\u7684\u64cd\u4f5c\u3002 <\/p>\n

2.2 \u7f51\u7edc\u8bf7\u6c42\u7684\u53d1\u8d77\u4e0e\u7ba1\u7406 <\/h3>\n

2.2.1 \u4f7f\u7528AsyncTask\u53d1\u8d77\u7f51\u7edc\u8bf7\u6c42 <\/h4>\n

AsyncTask \u662fAndroid\u63d0\u4f9b\u7684\u4e00\u4e2a\u7528\u4e8e\u5904\u7406\u540e\u53f0\u4efb\u52a1\u4e0eUI\u4ea4\u4e92\u7684\u8f85\u52a9\u7c7b\u3002\u5c3d\u7ba1\u4eceAndroid 11\u5f00\u59cb\u5df2\u88ab\u5b98\u65b9\u5f03\u7528，\u4f46\u5bf9\u4e8e\u7406\u89e3\u7f51\u7edc\u8bf7\u6c42\u7684\u57fa\u672c\u6982\u5ff5\u4ecd\u7136\u6709\u5e2e\u52a9\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 AsyncTask \u53d1\u8d77\u7f51\u7edc\u8bf7\u6c42\u7684\u4e00\u4e2a\u7b80\u5355\u793a\u4f8b： <\/p>\n

private class DownloadWebpageTask extends AsyncTask<String, Void, String> {
\n @Override
\n protected String doInBackground(String… urls) {
\n String response = null;
\n try {
\n URL url = new URL(urls[0]);
\n HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
\n try {
\n InputStream in = new BufferedInputStream(urlConnection.getInputStream());
\n response = readStream(in);
\n } finally {
\n urlConnection.disconnect();
\n }
\n } catch (IOException e) {
\n Log.e("AsyncTask", "Error ", e);
\n }
\n return response;
\n }<\/p>\n

@Override
\n protected void onPostExecute(String result) {
\n \/\/ \u66f4\u65b0UI\u5143\u7d20，\u4f8b\u5982\u663e\u793a\u7ed3\u679c\u5728TextView\u4e2d
\n textView.setText(result);
\n }
\n}<\/p>\n

\u5728\u5b9e\u9645\u5e94\u7528\u4e2d，\u6211\u4eec\u5e94\u5f53\u4f7f\u7528 Executor \u6765\u66ff\u4ee3 AsyncTask ，\u5e76\u4e14\u786e\u4fdd\u9075\u5b88Android 6.0\u4ee5\u540e\u7684\u8fd0\u884c\u65f6\u6743\u9650\u6a21\u578b\u3002 <\/p>\n

2.2.2 \u4f7f\u7528Volley\u548cRetrofit\u6846\u67b6\u8fdb\u884c\u7f51\u7edc\u8bf7\u6c42 <\/h4>\n

\u5728\u73b0\u4ee3Android\u5f00\u53d1\u4e2d，Volley\u548cRetrofit\u662f\u4e24\u4e2a\u975e\u5e38\u6d41\u884c\u7684\u7f51\u7edc\u8bf7\u6c42\u5e93，\u5b83\u4eec\u63d0\u4f9b\u4e86\u66f4\u52a0\u9ad8\u6548\u548c\u4fbf\u6377\u7684\u65b9\u5f0f\u6765\u5904\u7406\u7f51\u7edc\u8bf7\u6c42\u3002\u4f7f\u7528\u8fd9\u4e9b\u5e93\u53ef\u4ee5\u907f\u514d\u76f4\u63a5\u5904\u7406HTTP\u8bf7\u6c42\u7684\u590d\u6742\u6027，\u540c\u65f6\u8fd8\u80fd\u591f\u7b80\u5316\u7f51\u7edc\u5c42\u7684\u4ee3\u7801\u3002 <\/p>\n

Volley： <\/p>\n

Volley\u662fAndroid\u5b98\u65b9\u63d0\u4f9b\u7684\u4e00\u79cd\u7f51\u7edc\u901a\u4fe1\u5e93，\u5b83\u80fd\u6709\u6548\u7ba1\u7406\u7f51\u7edc\u8bf7\u6c42\u961f\u5217，\u652f\u6301\u56fe\u50cf\u548c\u5b57\u7b26\u4e32\u7684\u81ea\u52a8\u89e3\u6790，\u5e76\u63d0\u4f9b\u4e86\u81ea\u5b9a\u4e49\u8bf7\u6c42\u7c7b\u578b\u548c\u54cd\u5e94\u5904\u7406\u7684\u80fd\u529b\u3002\u4f7f\u7528Volley\u53d1\u8d77\u7f51\u7edc\u8bf7\u6c42\u7684\u4e00\u4e2a\u57fa\u7840\u793a\u4f8b： <\/p>\n

StringRequest stringRequest = new StringRequest(Request.Method.GET, URL,
\n new Response.Listener<String>() {
\n @Override
\n public void onResponse(String response) {
\n \/\/ \u5904\u7406\u6765\u81ea\u670d\u52a1\u5668\u7684\u54cd\u5e94
\n }
\n },
\n new Response.ErrorListener() {
\n @Override
\n public void onErrorResponse(VolleyError error) {
\n \/\/ \u5904\u7406\u8bf7\u6c42\u9519\u8bef
\n }
\n });<\/p>\n

\u901a\u8fc7\u521b\u5efa StringRequest \u5b9e\u4f8b，\u914d\u7f6e\u8bf7\u6c42\u7684URL\u3001\u54cd\u5e94\u76d1\u542c\u5668\u4ee5\u53ca\u9519\u8bef\u76d1\u542c\u5668，\u53ef\u4ee5\u5b8c\u6210\u4e00\u4e2a\u7f51\u7edc\u8bf7\u6c42\u7684\u6784\u5efa\u3002 <\/p>\n

Retrofit： <\/p>\n

Retrofit\u5c06\u7f51\u7edc\u8bf7\u6c42\u62bd\u8c61\u4e3a\u63a5\u53e3\u65b9\u6cd5，\u5e76\u5229\u7528\u6ce8\u89e3\u6765\u63cf\u8ff0\u8fd9\u4e9b\u65b9\u6cd5\u5982\u4f55\u6620\u5c04\u5230HTTP\u8bf7\u6c42\u3002\u5b83\u652f\u6301\u5f02\u6b65\u8c03\u7528，\u5e76\u4e14\u80fd\u591f\u81ea\u52a8\u5c06\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u8f6c\u6362\u6210Java\u5bf9\u8c61\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528Retrofit\u8fdb\u884c\u7f51\u7edc\u8bf7\u6c42\u7684\u57fa\u672c\u6b65\u9aa4： <\/p>\n

\/\/ \u5b9a\u4e49\u4e00\u4e2a\u63a5\u53e3\u63cf\u8ff0HTTP\u8bf7\u6c42
\npublic interface ApiService {
\n @GET("users\/{user}\/repos")
\n Call<List<Repository>> listRepos(@Path("user") String user);
\n}<\/p>\n

\/\/ \u521d\u59cb\u5316Retrofit\u5bf9\u8c61，\u8bbe\u7f6e\u57fa\u7840URL\u548c\u8f6c\u6362\u5668
\nRetrofit retrofit = new Retrofit.Builder()
\n .baseUrl("https:\/\/api.github.com\/")
\n .addConverterFactory(GsonConverterFactory.create())
\n .build();<\/p>\n

\/\/ \u521b\u5efa\u63a5\u53e3\u5b9e\u4f8b\u5e76\u6267\u884c\u8bf7\u6c42
\nApiService service = retrofit.create(ApiService.class);
\nCall<List<Repository>> call = service.listRepos("octocat");
\ncall.enqueue(new Callback<List<Repository>>() {
\n @Override
\n public void onResponse(Call<List<Repository>> call, Response<List<Repository>> response) {
\n \/\/ \u5904\u7406\u8fd4\u56de\u7684\u5217\u8868\u6570\u636e
\n }<\/p>\n

@Override
\n public void onFailure(Call<List<Repository>> call, Throwable t) {
\n \/\/ \u5904\u7406\u8bf7\u6c42\u5931\u8d25\u7684\u60c5\u51b5
\n }
\n});<\/p>\n

Retrofit\u901a\u8fc7\u63a5\u53e3\u6ce8\u89e3\u7b80\u5316\u4e86\u7f51\u7edc\u8bf7\u6c42\u7684\u6784\u5efa，\u5e76\u5141\u8bb8\u5f00\u53d1\u8005\u4f7f\u7528\u540c\u6b65\u6216\u5f02\u6b65\u7684\u65b9\u5f0f\u6765\u53d1\u8d77\u8bf7\u6c42\u3002 <\/p>\n

2.3 \u9519\u8bef\u5904\u7406\u4e0e\u8d44\u6e90\u7ba1\u7406 <\/h3>\n

2.3.1 \u5e38\u89c1\u9519\u8bef\u5904\u7406\u65b9\u6cd5 <\/h4>\n

\u7f51\u7edc\u8bf7\u6c42\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u9047\u5230\u591a\u79cd\u9519\u8bef，\u4f8b\u5982\u7f51\u7edc\u8fde\u63a5\u95ee\u9898\u3001\u670d\u52a1\u5668\u9519\u8bef\u54cd\u5e94\u3001\u8d85\u65f6\u7b49\u3002\u6b63\u786e\u7684\u9519\u8bef\u5904\u7406\u65b9\u6cd5\u53ef\u4ee5\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u548c\u5e94\u7528\u7684\u7a33\u5b9a\u6027\u3002\u4ee5\u4e0b\u662f\u5e38\u89c1\u7684\u9519\u8bef\u5904\u7406\u65b9\u6cd5： <\/p>\n

  • \u7f51\u7edc\u72b6\u6001\u76d1\u542c： \u5229\u7528Android\u7684 ConnectivityManager \u6765\u76d1\u542c\u7f51\u7edc\u8fde\u63a5\u72b6\u6001，\u786e\u4fdd\u5728\u7f51\u7edc\u53ef\u7528\u65f6\u53d1\u8d77\u8bf7\u6c42\u3002 <\/li>\n
  • \u8d85\u65f6\u8bbe\u7f6e： \u4e3aHTTP\u8bf7\u6c42\u8bbe\u7f6e\u5408\u7406\u7684\u8d85\u65f6\u65f6\u95f4，\u907f\u514d\u8bf7\u6c42\u7531\u4e8e\u7f51\u7edc\u95ee\u9898\u957f\u65f6\u95f4\u65e0\u54cd\u5e94\u3002 <\/li>\n
  • \u9519\u8bef\u91cd\u8bd5\u673a\u5236： \u5f53\u9047\u5230\u6682\u65f6\u6027\u9519\u8bef\u65f6，\u5982\u7f51\u7edc\u8fde\u63a5\u4e2d\u65ad，\u53ef\u4ee5\u8bbe\u8ba1\u91cd\u8bd5\u673a\u5236，\u4f46\u8981\u6ce8\u610f\u91cd\u8bd5\u6b21\u6570\u548c\u95f4\u9694\u65f6\u95f4\u7684\u63a7\u5236\u3002 <\/li>\n
  • \u9519\u8bef\u65e5\u5fd7\u8bb0\u5f55： \u8bb0\u5f55\u9519\u8bef\u4fe1\u606f\u548c\u5806\u6808\u4fe1\u606f，\u4fbf\u4e8e\u540e\u7eed\u7684\u8c03\u8bd5\u548c\u5206\u6790\u3002 <\/li>\n

    2.3.2 \u5173\u95ed\u8fde\u63a5\u4e0e\u8d44\u6e90\u91ca\u653e <\/h4>\n

    \u7f51\u7edc\u8bf7\u6c42\u7ed3\u675f\u540e，\u5e94\u7acb\u5373\u5173\u95ed\u548c\u91ca\u653e\u6240\u6709\u76f8\u5173\u8d44\u6e90，\u5305\u62ec\u5173\u95ed\u8f93\u5165\u6d41\u3001\u8f93\u51fa\u6d41\u3001\u8fde\u63a5\u7b49\u3002\u8fd9\u662f\u7f51\u7edc\u7f16\u7a0b\u4e2d\u7684\u4e00\u4e2a\u57fa\u672c\u51c6\u5219，\u53ef\u4ee5\u9632\u6b62\u8d44\u6e90\u6cc4\u9732，\u786e\u4fdd\u5e94\u7528\u7684\u6027\u80fd\u3002\u5728\u4f7f\u7528 HttpURLConnection \u53d1\u8d77\u8bf7\u6c42\u65f6，\u901a\u5e38\u4f1a\u8fd9\u6837\u505a： <\/p>\n

    \/\/ \u5047\u8bbeurlConnection\u662f\u4e00\u4e2a\u5df2\u7ecf\u6253\u5f00\u7684HttpURLConnection\u5b9e\u4f8b
    \nInputStream in = urlConnection.getInputStream();
    \n\/\/ \u4f7f\u7528\u5b8c\u6bd5\u540e\u5173\u95ed\u8f93\u5165\u6d41
    \nin.close();
    \n\/\/ \u5173\u95ed\u8fde\u63a5
    \nurlConnection.disconnect();<\/p>\n

    \u52a1\u5fc5\u8bb0\u5f97\u5728\u8bf7\u6c42\u7ed3\u675f\u540e\u8c03\u7528 disconnect() \u65b9\u6cd5\u6765\u5173\u95ed\u8fde\u63a5，\u907f\u514d\u8d44\u6e90\u6cc4\u9732\u3002\u6b64\u5916，\u5982\u679c\u4f7f\u7528\u4e86\u8fde\u63a5\u6c60，\u5e94\u5728\u9002\u5f53\u7684\u65f6\u5019\u5173\u95ed\u8fde\u63a5\u6c60，\u4ee5\u91ca\u653e\u7cfb\u7edf\u8d44\u6e90\u3002 <\/p>\n

    \u4ee5\u4e0a\u5185\u5bb9\u5c55\u793a\u4e86\u5982\u4f55\u5728Android\u5e94\u7528\u4e2d\u6b63\u786e\u914d\u7f6e\u7f51\u7edc\u6743\u9650，\u53d1\u8d77\u7f51\u7edc\u8bf7\u6c42，\u5e76\u8fdb\u884c\u9519\u8bef\u5904\u7406\u548c\u8d44\u6e90\u7ba1\u7406\u3002\u8fd9\u4e9b\u77e5\u8bc6\u70b9\u5bf9\u4e8e\u6784\u5efa\u4e00\u4e2a\u9ad8\u6548\u3001\u7a33\u5b9a\u548c\u7528\u6237\u53cb\u597d\u7684\u5e94\u7528\u81f3\u5173\u91cd\u8981\u3002 <\/p>\n

    3. \u4f7f\u7528HttpURLConnection\u8fdb\u884cHTTP\u8bf7\u6c42 <\/h2>\n

    3.1 HttpURLConnection\u57fa\u7840 <\/h3>\n

    3.1.1 HttpURLConnection\u7684\u5de5\u4f5c\u539f\u7406 <\/h4>\n

    HttpURLConnection\u662fJava\u5728java.net\u5305\u4e0b\u63d0\u4f9b\u7684\u4e00\u4e2a\u7528\u4e8e\u53d1\u8d77HTTP\u8bf7\u6c42\u7684\u5de5\u5177\u7c7b\u3002\u5b83\u901a\u8fc7\u5e95\u5c42\u7684Socket\u8fde\u63a5，\u5b9e\u73b0\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684HTTP\u901a\u4fe1\u3002\u8fd9\u4e2a\u7c7b\u652f\u6301HTTP 1.1\u534f\u8bae，\u5305\u62ec\u5e38\u89c1\u7684GET\u3001POST\u7b49\u8bf7\u6c42\u65b9\u6cd5，\u5e76\u63d0\u4f9b\u4e86\u5bf9\u8bf7\u6c42\u5934\u3001\u54cd\u5e94\u5934\u7684\u5904\u7406\u4ee5\u53ca\u5bf9\u6570\u636e\u6d41\u7684\u8bfb\u5199\u64cd\u4f5c\u3002 <\/p>\n

    \u4f7f\u7528HttpURLConnection\u8fdb\u884c\u7f51\u7edc\u8bf7\u6c42\u7684\u57fa\u672c\u6d41\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4： 1. \u521b\u5efaURL\u5bf9\u8c61，\u5e76\u6253\u5f00\u8fde\u63a5\u3002 2. \u8bbe\u7f6e\u8fde\u63a5\u53c2\u6570，\u5982\u8bf7\u6c42\u65b9\u6cd5\u3001\u8d85\u65f6\u3001\u5185\u5bb9\u7c7b\u578b\u7b49\u3002 3. \u53d1\u9001\u8bf7\u6c42\u548c\u8bfb\u53d6\u54cd\u5e94\u3002 4. \u5173\u95ed\u8fde\u63a5\u3002 <\/p>\n

    3.1.2 HttpURLConnection\u7684\u521d\u59cb\u5316\u548c\u914d\u7f6e <\/h4>\n

    \u521d\u59cb\u5316HttpURLConnection\u5bf9\u8c61\u9700\u8981\u5148\u901a\u8fc7URL\u5bf9\u8c61\u521b\u5efa\u4e00\u4e2a\u65b0\u7684HttpURLConnection\u5b9e\u4f8b\u3002\u7136\u540e，\u53ef\u4ee5\u901a\u8fc7\u4e00\u7cfb\u5217\u65b9\u6cd5\u5bf9\u8fde\u63a5\u8fdb\u884c\u914d\u7f6e，\u5305\u62ec\u8bbe\u7f6e\u8bf7\u6c42\u65b9\u5f0f\u3001\u8bf7\u6c42\u5934\u3001\u8fde\u63a5\u8d85\u65f6\u65f6\u95f4\u7b49\u3002\u4f8b\u5982，\u8bbe\u7f6e\u8bf7\u6c42\u65b9\u6cd5\u4e3aGET\u7684\u4ee3\u7801\u5982\u4e0b： <\/p>\n

    URL url = new URL("http:\/\/example.com\/api\/data");
    \nHttpURLConnection connection = (HttpURLConnection) url.openConnection();
    \nconnection.setRequestMethod("GET");
    \nconnection.setConnectTimeout(5000);
    \nconnection.setReadTimeout(5000);<\/p>\n

    \u5728\u521d\u59cb\u5316\u548c\u914d\u7f6e\u9636\u6bb5，\u5f00\u53d1\u8005\u9700\u8981\u7279\u522b\u6ce8\u610f\u5904\u7406\u8bf7\u6c42\u5934\u548c\u54cd\u5e94\u5934\u3002\u8bbe\u7f6e\u6b63\u786e\u7684\u8bf7\u6c42\u5934\u53ef\u4ee5\u544a\u8bc9\u670d\u52a1\u5668\u6211\u4eec\u671f\u671b\u7684\u54cd\u5e94\u7c7b\u578b\u3001\u5185\u5bb9\u7f16\u7801\u7b49\u4fe1\u606f，\u800c\u8bfb\u53d6\u54cd\u5e94\u5934\u5219\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u4e86\u89e3\u670d\u52a1\u5668\u8fd4\u56de\u6570\u636e\u7684\u8be6\u7ec6\u4fe1\u606f，\u4f8b\u5982\u5185\u5bb9\u7c7b\u578b\u3001\u5185\u5bb9\u957f\u5ea6\u7b49\u3002 <\/p>\n

    3.2 HTTP\u8bf7\u6c42\u7684\u53d1\u9001\u4e0e\u63a5\u6536 <\/h3>\n

    3.2.1 \u6784\u5efaHTTP\u8bf7\u6c42 <\/h4>\n

    \u6784\u5efa\u4e00\u4e2aHTTP\u8bf7\u6c42\u9700\u8981\u660e\u786e\u8bf7\u6c42\u7684URL\u3001\u8bf7\u6c42\u65b9\u6cd5（GET\u3001POST\u3001PUT\u7b49）\u3001\u8bf7\u6c42\u5934\u3001\u8bf7\u6c42\u4f53\u7b49\u3002\u4f8b\u5982，\u521b\u5efa\u4e00\u4e2aPOST\u8bf7\u6c42\u9700\u8981\u6307\u5b9aURL\u548c\u8bbe\u7f6e\u8bf7\u6c42\u65b9\u6cd5\u4e3aPOST\u3002\u6b64\u5916，\u5982\u679c\u8bf7\u6c42\u9700\u8981\u53d1\u9001\u6570\u636e（\u5982\u8868\u5355\u6570\u636e\u6216JSON\u6570\u636e），\u5219\u9700\u8981\u8bbe\u7f6e Content-Type \u8bf7\u6c42\u5934，\u5e76\u51c6\u5907\u8bf7\u6c42\u4f53\u3002 <\/p>\n

    \u4ee5\u4e0b\u662f\u4e00\u4e2a\u53d1\u9001POST\u8bf7\u6c42\u7684\u4ee3\u7801\u793a\u4f8b： <\/p>\n

    String urlParameters = "param1=value1&param2=value2";
    \nURL url = new URL("http:\/\/example.com\/api\/data");
    \nHttpURLConnection conn = (HttpURLConnection) url.openConnection();
    \nconn.setDoOutput(true);
    \nconn.setRequestMethod("POST");
    \nconn.setRequestProperty("Content-Type", "application\/x-www-form-urlencoded");
    \nconn.setRequestProperty("Content-Length", String.valueOf(urlParameters.getBytes().length));
    \nDataOutputStream wr = new DataOutputStream(conn.getOutputStream());
    \nwr.writeBytes(urlParameters);
    \nwr.flush();
    \nwr.close();<\/p>\n

    3.2.2 \u83b7\u53d6\u670d\u52a1\u5668\u54cd\u5e94\u6570\u636e <\/h4>\n

    \u5f53HTTP\u8bf7\u6c42\u6210\u529f\u53d1\u9001\u540e，\u670d\u52a1\u5668\u4f1a\u5904\u7406\u8bf7\u6c42\u5e76\u8fd4\u56de\u54cd\u5e94\u3002\u901a\u8fc7HttpURLConnection\u5bf9\u8c61，\u6211\u4eec\u53ef\u4ee5\u8bfb\u53d6\u54cd\u5e94\u7684\u72b6\u6001\u7801\u3001\u54cd\u5e94\u5934\u548c\u54cd\u5e94\u4f53\u3002\u83b7\u53d6\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u4e00\u822c\u901a\u8fc7\u8f93\u5165\u6d41（InputStream）\u6765\u5b8c\u6210，\u5982\u4e0b\u4f8b\u6240\u793a： <\/p>\n

    BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    \nString inputLine;
    \nStringBuilder response = new StringBuilder();<\/p>\n

    while ((inputLine = in.readLine()) != null) {
    \n response.append(inputLine);
    \n}
    \nin.close();<\/p>\n

    \/\/ \u6b64\u65f6response\u53d8\u91cf\u4e2d\u5b58\u50a8\u7684\u5c31\u662f\u670d\u52a1\u5668\u8fd4\u56de\u7684\u54cd\u5e94\u6570\u636e<\/p>\n

    3.3 \u9519\u8bef\u5904\u7406\u4e0e\u8d44\u6e90\u7ba1\u7406 <\/h3>\n

    3.3.1 \u5e38\u89c1\u9519\u8bef\u5904\u7406\u65b9\u6cd5 <\/h4>\n

    \u7f51\u7edc\u8bf7\u6c42\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u9047\u5230\u591a\u79cd\u9519\u8bef，\u4f8b\u5982\u7f51\u7edc\u4e0d\u53ef\u8fbe\u3001\u670d\u52a1\u5668\u65e0\u54cd\u5e94\u3001\u8bf7\u6c42\u6570\u636e\u683c\u5f0f\u9519\u8bef\u7b49\u3002\u6b63\u786e\u7684\u9519\u8bef\u5904\u7406\u65b9\u6cd5\u662f\u4fdd\u8bc1\u5e94\u7528\u7a33\u5b9a\u8fd0\u884c\u7684\u5173\u952e\u3002\u4f7f\u7528HttpURLConnection\u65f6，\u53ef\u4ee5\u901a\u8fc7\u68c0\u67e5\u54cd\u5e94\u7801\u6765\u5224\u65ad\u8bf7\u6c42\u662f\u5426\u6210\u529f\u3002\u4f8b\u5982，HTTP\u72b6\u6001\u78012xx\u8868\u793a\u6210\u529f，4xx\u8868\u793a\u5ba2\u6237\u7aef\u9519\u8bef，5xx\u8868\u793a\u670d\u52a1\u5668\u9519\u8bef\u3002 <\/p>\n

    if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
    \n \/\/ \u8bf7\u6c42\u6210\u529f\u5904\u7406
    \n} else {
    \n \/\/ \u8bf7\u6c42\u5931\u8d25\u5904\u7406，\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u54cd\u5e94\u7801\u8fdb\u884c\u4e0d\u540c\u7684\u5f02\u5e38\u5904\u7406\u903b\u8f91
    \n}<\/p>\n

    3.3.2 \u5173\u95ed\u8fde\u63a5\u4e0e\u8d44\u6e90\u91ca\u653e <\/h4>\n

    \u8d44\u6e90\u7ba1\u7406\u662f\u7f51\u7edc\u7f16\u7a0b\u4e2d\u7684\u4e00\u9879\u91cd\u8981\u5de5\u4f5c\u3002\u4e3a\u4e86\u9632\u6b62\u8d44\u6e90\u6cc4\u9732，\u5fc5\u987b\u786e\u4fdd\u6240\u6709\u7684\u7f51\u7edc\u8d44\u6e90\u5728\u4f7f\u7528\u540e\u90fd\u88ab\u6b63\u786e\u5173\u95ed\u3002HttpURLConnection\u63d0\u4f9b\u4e86 disconnect() \u65b9\u6cd5\u6765\u5173\u95ed\u8fde\u63a5\u548c\u91ca\u653e\u76f8\u5173\u8d44\u6e90\u3002 <\/p>\n

    conn.disconnect();<\/p>\n

    \u5728\u5b9e\u9645\u5f00\u53d1\u4e2d，\u901a\u5e38\u4f1a\u5c06\u7f51\u7edc\u8bf7\u6c42\u64cd\u4f5c\u653e\u5728\u5355\u72ec\u7684\u7ebf\u7a0b\u4e2d\u6267\u884c，\u5e76\u5728\u64cd\u4f5c\u5b8c\u6210\u540e\u5173\u95ed\u6240\u6709\u6253\u5f00\u7684\u6d41\u548c\u8fde\u63a5\u3002\u4f7f\u7528try-with-resources\u8bed\u53e5\u53ef\u4ee5\u5728Java 7\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\u81ea\u52a8\u5173\u95ed\u5b9e\u73b0\u4e86AutoCloseable\u63a5\u53e3\u7684\u8d44\u6e90\u3002 <\/p>\n

    try (BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()))) {
    \n String inputLine;
    \n StringBuilder response = new StringBuilder();
    \n while ((inputLine = in.readLine()) != null) {
    \n response.append(inputLine);
    \n }
    \n \/\/ \u5904\u7406response
    \n} catch (IOException e) {
    \n \/\/ \u5904\u7406\u5f02\u5e38
    \n}
    \n\/\/ \u8fde\u63a5\u5df2\u81ea\u52a8\u5173\u95ed<\/p>\n

    \u81f3\u6b64，\u6211\u4eec\u5df2\u7ecf\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u4f7f\u7528HttpURLConnection\u8fdb\u884cHTTP\u8bf7\u6c42\u7684\u57fa\u7840\u77e5\u8bc6，\u5305\u62ec\u5982\u4f55\u53d1\u8d77\u8bf7\u6c42\u3001\u63a5\u6536\u54cd\u5e94\u4ee5\u53ca\u9519\u8bef\u5904\u7406\u3002\u5728\u540e\u7eed\u7ae0\u8282\u4e2d，\u6211\u4eec\u5c06\u63a2\u8ba8\u5982\u4f55\u4f7f\u7528Gson\u5e93\u6765\u89e3\u6790JSON\u6570\u636e，\u8fdb\u4e00\u6b65\u63d0\u5347Android\u5ba2\u6237\u7aef\u7684\u6570\u636e\u5904\u7406\u80fd\u529b\u3002 <\/p>\n

    4. \u4f7f\u7528Gson\u5e93\u89e3\u6790JSON\u6570\u636e <\/h2>\n

    4.1 Gson\u5e93\u4ecb\u7ecd <\/h3>\n

    4.1.1 Gson\u5e93\u7684\u57fa\u672c\u529f\u80fd\u4e0e\u4f18\u52bf <\/h4>\n

    Gson\u5e93\u7531Google\u5f00\u53d1，\u7528\u4e8e\u5728Java\u5bf9\u8c61\u4e0eJSON\u6570\u636e\u683c\u5f0f\u4e4b\u95f4\u8fdb\u884c\u8f6c\u6362\u3002\u5b83\u7684\u529f\u80fd\u4e0d\u4ec5\u9650\u4e8e\u5c06JSON\u5b57\u7b26\u4e32\u89e3\u6790\u6210Java\u5bf9\u8c61，\u4e5f\u80fd\u5c06Java\u5bf9\u8c61\u5e8f\u5217\u5316\u6210JSON\u5b57\u7b26\u4e32\u3002Gson\u7684\u4f18\u52bf\u5728\u4e8e\u5176\u7b80\u6d01\u6613\u7528\u7684API，\u5f3a\u5927\u7684\u8f6c\u6362\u80fd\u529b，\u4ee5\u53ca\u4e0d\u9700\u8981\u989d\u5916\u7684\u6ce8\u89e3\u6216\u914d\u7f6e，\u4f7f\u5f97\u5f00\u53d1\u4eba\u5458\u80fd\u591f\u5feb\u901f\u5b9e\u73b0\u6570\u636e\u7684\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u3002 <\/p>\n

    4.1.2 Gson\u5e93\u4e0eJSON\u6570\u636e\u683c\u5f0f <\/h4>\n

    \u7531\u4e8eJSON\u662f\u8f7b\u91cf\u7ea7\u7684\u6570\u636e\u4ea4\u6362\u683c\u5f0f，Gson\u5e93\u5728Android\u5f00\u53d1\u4e2d\u88ab\u5e7f\u6cdb\u4f7f\u7528，\u7279\u522b\u662f\u5728\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4ea4\u4e92\u65f6，\u7ecf\u5e38\u9700\u8981\u5904\u7406JSON\u683c\u5f0f\u7684\u6570\u636e\u3002Gson\u5e93\u63d0\u4f9b\u4e86\u4e00\u79cd\u76f4\u63a5\u4e14\u9ad8\u6548\u7684\u65b9\u6cd5\u6765\u8f6c\u6362JSON\u5230Java\u5bf9\u8c61，\u6216\u8005\u53cd\u4e4b，\u800c\u4e0d\u9700\u8981\u624b\u52a8\u7f16\u5199\u89e3\u6790JSON\u5b57\u7b26\u4e32\u7684\u590d\u6742\u4ee3\u7801\u3002 <\/p>\n

    4.2 Gson\u89e3\u6790\u6d41\u7a0b <\/h3>\n

    4.2.1 \u5c06JSON\u6570\u636e\u8f6c\u6362\u4e3aJava\u5bf9\u8c61 <\/h4>\n

    \u4e3a\u4e86\u5c06JSON\u6570\u636e\u8f6c\u6362\u4e3aJava\u5bf9\u8c61，Gson\u5e93\u63d0\u4f9b\u4e86\u4e00\u4e2a\u975e\u5e38\u76f4\u63a5\u7684\u65b9\u6cd5： fromJson() \u3002\u6b64\u65b9\u6cd5\u9700\u8981\u4e24\u4e2a\u53c2\u6570，\u7b2c\u4e00\u4e2a\u662fJSON\u683c\u5f0f\u7684\u5b57\u7b26\u4e32，\u7b2c\u4e8c\u4e2a\u662f\u8981\u8f6c\u6362\u6210\u7684\u76ee\u6807Java\u7c7b\u7684\u7c7b\u578b\u3002 <\/p>\n

    \/\/ \u793a\u4f8b\u4ee3\u7801：\u5c06JSON\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3aJava\u5bf9\u8c61
    \nString json = "{\\\\"name\\\\":\\\\"John\\\\", \\\\"age\\\\":30}";
    \nType type = new TypeToken<User>() {}.getType();
    \nUser user = gson.fromJson(json, type);<\/p>\n

    \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d，\u6211\u4eec\u9996\u5148\u5b9a\u4e49\u4e86\u4e00\u4e2aJSON\u683c\u5f0f\u7684\u5b57\u7b26\u4e32 json \u3002\u7136\u540e\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a TypeToken \u6765\u83b7\u53d6\u6cdb\u578b\u4fe1\u606f，\u8fd9\u5141\u8bb8Gson\u51c6\u786e\u5730\u77e5\u9053\u6211\u4eec\u60f3\u8981\u5c06JSON\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u7684Java\u7c7b\u7c7b\u578b\u3002\u6700\u540e，\u6211\u4eec\u8c03\u7528 fromJson \u65b9\u6cd5\u5c06JSON\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u4e00\u4e2a User \u5bf9\u8c61\u3002 <\/p>\n

    4.2.2 \u5c06Java\u5bf9\u8c61\u5e8f\u5217\u5316\u4e3aJSON\u5b57\u7b26\u4e32 <\/h4>\n

    \u5c06Java\u5bf9\u8c61\u8f6c\u6362\u6210JSON\u5b57\u7b26\u4e32\u7684\u8fc7\u7a0b\u4e0e\u4e0a\u8ff0\u8fc7\u7a0b\u76f8\u53cd\u3002Gson\u5e93\u63d0\u4f9b\u4e86\u4e00\u4e2a toJson() \u65b9\u6cd5\u6765\u5b8c\u6210\u8fd9\u4e2a\u64cd\u4f5c，\u5b83\u540c\u6837\u9700\u8981\u4e24\u4e2a\u53c2\u6570：\u4e00\u4e2a\u662fJava\u5bf9\u8c61，\u53e6\u4e00\u4e2a\u662f JsonWriter ， PrintWriter \u6216\u8005 OutputStream \u3002 <\/p>\n

    \/\/ \u793a\u4f8b\u4ee3\u7801：\u5c06Java\u5bf9\u8c61\u8f6c\u6362\u4e3aJSON\u5b57\u7b26\u4e32
    \nUser user = new User("John", 30);
    \nString json = gson.toJson(user);<\/p>\n

    \u5728\u8fd9\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u4e2d，\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a User \u5bf9\u8c61，\u5e76\u4f7f\u7528Gson\u7684 toJson \u65b9\u6cd5\u5c06\u5176\u8f6c\u6362\u6210JSON\u5b57\u7b26\u4e32\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u907f\u514d\u4e86\u624b\u52a8\u62fc\u63a5JSON\u5b57\u7b26\u4e32\u7684\u7e41\u7410\u548c\u9519\u8bef\u3002 <\/p>\n

    4.3 Gson\u9ad8\u7ea7\u7279\u6027 <\/h3>\n

    4.3.1 \u81ea\u5b9a\u4e49\u7c7b\u578b\u8f6c\u6362\u5668 <\/h4>\n

    Gson\u5e93\u5141\u8bb8\u5f00\u53d1\u8005\u901a\u8fc7\u81ea\u5b9a\u4e49 TypeAdapter \u6216\u8005 TypeConverter \u6765\u5b9e\u73b0\u590d\u6742\u7684\u7c7b\u578b\u8f6c\u6362\u903b\u8f91\u3002\u8fd9\u6837，\u5f00\u53d1\u8005\u53ef\u4ee5\u63a7\u5236\u5982\u4f55\u5c06\u7279\u5b9a\u7684Java\u7c7b\u578b\u8f6c\u6362\u4e3aJSON，\u4ee5\u53ca\u5982\u4f55\u5c06JSON\u89e3\u6790\u56deJava\u7c7b\u578b\u3002 <\/p>\n

    4.3.2 \u4f7f\u7528Gson\u5904\u7406\u590d\u6742JSON\u7ed3\u6784 <\/h4>\n

    \u5f53\u5904\u7406\u590d\u6742\u7684JSON\u7ed3\u6784\u65f6，\u6bd4\u5982\u5d4c\u5957\u7684JSON\u5bf9\u8c61\u6216\u6570\u7ec4，Gson\u5141\u8bb8\u901a\u8fc7\u6ce8\u89e3\u5982 @SerializedName \u6765\u89e3\u51b3Java\u5b57\u6bb5\u540d\u548cJSON\u5c5e\u6027\u540d\u4e0d\u5339\u914d\u7684\u95ee\u9898\u3002\u6b64\u5916， @Expose \u6ce8\u89e3\u53ef\u4ee5\u7528\u6765\u6807\u8bb0\u54ea\u4e9b\u5b57\u6bb5\u9700\u8981\u88ab\u5e8f\u5217\u5316\u6216\u53cd\u5e8f\u5217\u5316\u3002 <\/p>\n

    public class User {
    \n @SerializedName("full_name")
    \n @Expose
    \n private String fullName;<\/p>\n

    @SerializedName("age")
    \n @Expose
    \n private int age;
    \n \/\/ getter and setter methods
    \n}<\/p>\n

    \u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d， User \u7c7b\u7684 fullName \u5b57\u6bb5\u901a\u8fc7 @SerializedName \u6ce8\u89e3\u4e0eJSON\u5bf9\u8c61\u4e2d\u7684 full_name \u5c5e\u6027\u5173\u8054\u8d77\u6765\u3002 @Expose \u6ce8\u89e3\u5219\u8868\u660e\u8fd9\u4e9b\u5b57\u6bb5\u5c06\u53c2\u4e0e\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u8fc7\u7a0b\u3002 <\/p>\n

    Gson\u5e93\u7684\u9ad8\u7ea7\u7279\u6027，\u4f7f\u5f97\u5728\u5904\u7406\u590d\u6742\u7684JSON\u6570\u636e\u7ed3\u6784\u65f6，\u5f00\u53d1\u4eba\u5458\u80fd\u591f\u66f4\u52a0\u7075\u6d3b\u5730\u63a7\u5236\u6570\u636e\u7684\u8f6c\u6362\u8fc7\u7a0b\u3002\u5728\u672c\u7ae0\u7684\u540e\u7eed\u90e8\u5206，\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8Gson\u7684\u8fd9\u4e9b\u9ad8\u7ea7\u7279\u6027，\u5305\u62ec\u5982\u4f55\u81ea\u5b9a\u4e49\u7c7b\u578b\u8f6c\u6362\u5668，\u4ee5\u53ca\u5982\u4f55\u89e3\u51b3JSON\u6570\u636e\u7ed3\u6784\u4e0eJava\u5bf9\u8c61\u6620\u5c04\u4e4b\u95f4\u7684\u95ee\u9898\u3002 <\/p>\n

    5. Servlet\u6280\u672f\u670d\u52a1\u5668\u7aef\u54cd\u5e94 <\/h2>\n

    \u5728\u672c\u7ae0\u8282\u4e2d，\u6211\u4eec\u5c06\u6df1\u5165\u4e86\u89e3Servlet\u6280\u672f\u5728\u670d\u52a1\u5668\u7aef\u5904\u7406HTTP\u8bf7\u6c42\u5e76\u54cd\u5e94JSON\u6570\u636e\u7684\u8fc7\u7a0b\u3002Servlet\u4f5c\u4e3a\u4e00\u79cdJava\u8bed\u8a00\u7f16\u5199\u7684\u670d\u52a1\u5668\u7aef\u7a0b\u5e8f，\u5176\u4e3b\u8981\u529f\u80fd\u5728\u4e8e\u6269\u5c55\u670d\u52a1\u5668\u7684\u6027\u80fd，\u7279\u522b\u662f\u5728\u6267\u884c\u57fa\u4e8e\u5ba2\u6237\u7aef\u8bf7\u6c42\u52a8\u6001\u751f\u6210\u54cd\u5e94\u7684\u5e94\u7528\u4e2d\u3002\u6211\u4eec\u4f1a\u8be6\u7ec6\u63a2\u8ba8Servlet\u7684\u57fa\u672c\u5de5\u4f5c\u539f\u7406\u3001\u751f\u547d\u5468\u671f，\u4ee5\u53ca\u5982\u4f55\u6784\u5efaServlet\u6765\u8fd4\u56deJSON\u683c\u5f0f\u6570\u636e\u3002 <\/p>\n

    5.1 Servlet\u6280\u672f\u6982\u89c8 <\/h3>\n

    5.1.1 Servlet\u6280\u672f\u7684\u7ec4\u6210\u4e0e\u5de5\u4f5c\u539f\u7406 <\/h4>\n

    Servlet\u6280\u672f\u4e3b\u8981\u7531Servlet\u63a5\u53e3\u548cServlet\u5bb9\u5668（\u4e5f\u79f0\u4e3aWeb\u670d\u52a1\u5668）\u7ec4\u6210\u3002\u5176\u5de5\u4f5c\u539f\u7406\u53ef\u4ee5\u7b80\u5355\u6982\u62ec\u4e3a：\u5f53\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u4e2aHTTP\u8bf7\u6c42\u5230\u670d\u52a1\u5668\u65f6，\u670d\u52a1\u5668\u5c06\u8bf7\u6c42\u8f6c\u53d1\u7ed9\u76f8\u5e94\u7684Servlet，Servlet\u5904\u7406\u5b8c\u8bf7\u6c42\u540e\u751f\u6210\u54cd\u5e94\u5e76\u8fd4\u56de\u7ed9\u670d\u52a1\u5668，\u6700\u540e\u670d\u52a1\u5668\u5c06\u54cd\u5e94\u53d1\u9001\u56de\u5ba2\u6237\u7aef\u3002 <\/p>\n

    Servlet\u63a5\u53e3\u5b9a\u4e49\u4e86Java\u7a0b\u5e8f\u548cWeb\u670d\u52a1\u5668\u4e4b\u95f4\u4ea4\u4e92\u7684\u534f\u8bae\u3002Servlet\u5bb9\u5668\u8d1f\u8d23\u7ba1\u7406Servlet\u7684\u751f\u547d\u5468\u671f，\u5305\u62ec\u52a0\u8f7d\u3001\u5b9e\u4f8b\u5316\u3001\u521d\u59cb\u5316\u3001\u5904\u7406\u8bf7\u6c42\u4ee5\u53ca\u670d\u52a1\u7ec8\u6b62\u3002\u5e38\u89c1\u7684Servlet\u5bb9\u5668\u6709Tomcat\u3001Jetty\u7b49\u3002 <\/p>\n

    5.1.2 Servlet\u751f\u547d\u5468\u671f\u7684\u7406\u89e3 <\/h4>\n

    Servlet\u751f\u547d\u5468\u671f\u7531\u4ee5\u4e0b\u51e0\u4e2a\u9636\u6bb5\u7ec4\u6210： – \u52a0\u8f7d\u548c\u5b9e\u4f8b\u5316 ：Servlet\u5bb9\u5668\u8d1f\u8d23\u52a0\u8f7dServlet\u7c7b，\u5e76\u5b9e\u4f8b\u5316Servlet\u5bf9\u8c61\u3002 – \u521d\u59cb\u5316 ：\u901a\u8fc7\u8c03\u7528 init() \u65b9\u6cd5\u5b8c\u6210Servlet\u521d\u59cb\u5316\u3002\u5728\u6b64\u9636\u6bb5\u901a\u5e38\u6267\u884c\u4e00\u4e9b\u53ea\u5e94\u6267\u884c\u4e00\u6b21\u7684\u521d\u59cb\u5316\u64cd\u4f5c\u3002 – \u8bf7\u6c42\u5904\u7406 ：\u5bf9\u4e8e\u5ba2\u6237\u7aef\u7684\u6bcf\u4e00\u4e2a\u8bf7\u6c42，\u5bb9\u5668\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7ebf\u7a0b，\u8c03\u7528 service() \u65b9\u6cd5\u6765\u5904\u7406\u8bf7\u6c42\u3002 service() \u65b9\u6cd5\u4f1a\u6839\u636e\u8bf7\u6c42\u7c7b\u578b（GET\u3001POST\u7b49）\u8c03\u7528 doGet() , doPost() \u7b49\u65b9\u6cd5\u3002 – \u9500\u6bc1 ：\u5f53\u9700\u8981\u91ca\u653eServlet\u6240\u5360\u7528\u8d44\u6e90\u65f6，\u5bb9\u5668\u4f1a\u8c03\u7528 destroy() \u65b9\u6cd5\u3002\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u6267\u884c\u5fc5\u8981\u7684\u6e05\u7406\u5de5\u4f5c\u3002 <\/p>\n

    5.2 \u6784\u5efaServlet\u54cd\u5e94JSON\u6570\u636e <\/h3>\n

    5.2.1 \u521b\u5efa\u57fa\u672c\u7684Servlet\u7c7b <\/h4>\n

    import javax.servlet.*;
    \nimport javax.servlet.http.*;
    \nimport java.io.IOException;
    \nimport java.io.PrintWriter;
    \nimport com.google.gson.Gson;<\/p>\n

    public class JsonServlet extends HttpServlet {
    \n private Gson gson = new Gson();<\/p>\n

    @Override
    \n public void init() throws ServletException {
    \n \/\/ \u521d\u59cb\u5316\u64cd\u4f5c
    \n }<\/p>\n

    @Override
    \n protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    \n \/\/ \u5904\u7406GET\u8bf7\u6c42
    \n resp.setContentType("application\/json");
    \n resp.setCharacterEncoding("UTF-8");
    \n PrintWriter out = resp.getWriter();
    \n String jsonResponse = gson.toJson(buildSomeData());
    \n out.print(jsonResponse);
    \n out.flush();
    \n }<\/p>\n

    private Object buildSomeData() {
    \n \/\/ \u6784\u5efa\u4e00\u4e9b\u6570\u636e
    \n return new Object(); \/\/ \u793a\u4f8b\u5bf9\u8c61
    \n }<\/p>\n

    @Override
    \n public void destroy() {
    \n \/\/ \u9500\u6bc1\u64cd\u4f5c
    \n }
    \n}<\/p>\n

    \u5728\u8fd9\u4e2a\u57fa\u672c\u7684Servlet\u7c7b\u4e2d，\u6211\u4eec\u91cd\u5199\u4e86 doGet \u65b9\u6cd5\u6765\u5904\u7406GET\u8bf7\u6c42，\u5e76\u4f7f\u7528 Gson \u5e93\u5c06\u6570\u636e\u5bf9\u8c61\u5e8f\u5217\u5316\u6210JSON\u5b57\u7b26\u4e32\u3002 <\/p>\n

    5.2.2 \u7f16\u5199\u65b9\u6cd5\u8fd4\u56deJSON\u683c\u5f0f\u6570\u636e <\/h4>\n

    \u5728 doGet \u65b9\u6cd5\u4e2d，\u6211\u4eec\u901a\u8fc7\u8bbe\u7f6e\u54cd\u5e94\u7684\u5185\u5bb9\u7c7b\u578b\u4e3a application\/json ，\u8868\u660e\u6211\u4eec\u53d1\u9001\u7684\u6570\u636e\u662fJSON\u683c\u5f0f\u3002\u4e4b\u540e，\u4f7f\u7528 PrintWriter \u5c06\u5e8f\u5217\u5316\u540e\u7684JSON\u5b57\u7b26\u4e32\u5199\u5165\u8f93\u51fa\u6d41\u4e2d\u3002 <\/p>\n

    5.3 \u670d\u52a1\u5668\u7aef\u7684\u5f02\u5e38\u5904\u7406\u4e0e\u65e5\u5fd7\u8bb0\u5f55 <\/h3>\n

    5.3.1 \u5f02\u5e38\u5904\u7406\u673a\u5236 <\/h4>\n

    \u5f02\u5e38\u5904\u7406\u5728Servlet\u4e2d\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684，\u4ee5\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\u548c\u53ef\u9760\u6027\u3002Servlet\u63d0\u4f9b doGet \u3001 doPost \u7b49\u65b9\u6cd5\u5141\u8bb8\u629b\u51fa ServletException ，\u5e76\u4e14\u53ef\u4ee5\u5728\u8fd9\u4e9b\u65b9\u6cd5\u4e2d\u4f7f\u7528try-catch\u8bed\u53e5\u5757\u6765\u6355\u83b7\u548c\u5904\u7406\u5f02\u5e38\u3002 <\/p>\n

    @Override
    \nprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    \n try {
    \n \/\/ \u6b63\u5e38\u7684\u5904\u7406\u903b\u8f91
    \n } catch (SomeBusinessException e) {
    \n resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
    \n } catch (Exception e) {
    \n resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    \n }
    \n}<\/p>\n

    5.3.2 \u65e5\u5fd7\u8bb0\u5f55\u7684\u6700\u4f73\u5b9e\u8df5 <\/h4>\n

    \u65e5\u5fd7\u8bb0\u5f55\u5bf9\u4e8e\u8c03\u8bd5\u548c\u76d1\u63a7\u670d\u52a1\u5668\u5e94\u7528\u7a0b\u5e8f\u81f3\u5173\u91cd\u8981\u3002\u5efa\u8bae\u4f7f\u7528\u65e5\u5fd7\u6846\u67b6（\u5982Log4j\u3001SLF4J）\u8fdb\u884c\u65e5\u5fd7\u8bb0\u5f55，\u800c\u4e0d\u662f\u4f7f\u7528\u539f\u751f\u7684 System.out.println \u6216 System.err.println \u3002 <\/p>\n

    import org.slf4j.Logger;
    \nimport org.slf4j.LoggerFactory;<\/p>\n

    public class JsonServlet extends HttpServlet {
    \n private static final Logger logger = LoggerFactory.getLogger(JsonServlet.class);<\/p>\n

    @Override
    \n protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    \n try {
    \n \/\/ \u6b63\u5e38\u5904\u7406\u903b\u8f91
    \n logger.info("\u5904\u7406\u8bf7\u6c42\u5e76\u6210\u529f\u8fd4\u56deJSON\u6570\u636e");
    \n } catch (Exception e) {
    \n logger.error("\u5904\u7406\u8bf7\u6c42\u65f6\u53d1\u751f\u9519\u8bef", e);
    \n resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    \n }
    \n }
    \n}<\/p>\n

    \u5728\u672c\u7ae0\u8282\u4e2d，\u6211\u4eec\u8be6\u7ec6\u8ba8\u8bba\u4e86Servlet\u6280\u672f\u7684\u57fa\u672c\u7ec4\u6210\u3001\u5de5\u4f5c\u539f\u7406\u4ee5\u53ca\u5176\u751f\u547d\u5468\u671f\u3002\u968f\u540e，\u901a\u8fc7\u5b9e\u9645\u4ee3\u7801\u793a\u4f8b，\u5c55\u793a\u4e86\u5982\u4f55\u521b\u5efa\u4e00\u4e2a\u57fa\u672c\u7684Servlet\u7c7b\u4ee5\u53ca\u5982\u4f55\u5728\u5176\u4e2d\u6784\u5efaJSON\u54cd\u5e94\u3002\u6700\u540e，\u5f3a\u8c03\u4e86\u5f02\u5e38\u5904\u7406\u548c\u65e5\u5fd7\u8bb0\u5f55\u5728\u670d\u52a1\u5668\u7aef\u5f00\u53d1\u4e2d\u7684\u91cd\u8981\u6027，\u5e76\u63d0\u4f9b\u4e86\u76f8\u5e94\u7684\u6700\u4f73\u5b9e\u8df5\u4ee3\u7801\u793a\u4f8b\u3002\u8fd9\u6837\u7684\u5185\u5bb9\u7ed3\u6784\u4e0d\u4ec5\u5e2e\u52a9\u5f00\u53d1\u8005\u5efa\u7acb\u8d77\u5bf9Servlet\u6280\u672f\u7684\u7cfb\u7edf\u8ba4\u8bc6，\u8fd8\u63d0\u4f9b\u4e86\u53ef\u4ee5\u7acb\u5373\u5e94\u7528\u5230\u5b9e\u9645\u5f00\u53d1\u4e2d\u7684\u5b9e\u7528\u6280\u5de7\u3002 <\/p>\n

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    \u7b80\u4ecb：\u672cdemo\u6f14\u793a\u4e86Android\u624b\u673a\u5ba2\u6237\u7aef\u5982\u4f55\u901a\u8fc7WiFi\u8fde\u63a5\u670d\u52a1\u5668\u7aef\u83b7\u53d6JSON\u6570\u636e\u3002\u4ecb\u7ecd\u4e86\u7f51\u7edc\u8bbf\u95ee\u6743\u9650\u7684\u8bbe\u7f6e\u3001\u4f7f\u7528HttpURLConnection\u53d1\u8d77HTTP\u8bf7\u6c42\u3001\u91c7\u7528Gson\u5e93\u8fdb\u884cJSON\u89e3\u6790，\u5e76\u4ee5Servlet\u6280\u672f\u5728\u670d\u52a1\u5668\u7aef\u54cd\u5e94\u8bf7\u6c42\u3002\u901a\u8fc7\u8fd9\u4e2a\u793a\u4f8b，\u5f00\u53d1\u8005\u53ef\u4ee5\u5b66\u4e60Android\u4e0e\u540e\u7aef\u670d\u52a1\u4e4b\u95f4\u6570\u636e\u4ea4\u6362\u7684\u8fc7\u7a0b，\u4e86\u89e3\u5982\u4f55\u4f7f\u7528\u73b0\u4ee3\u7f16\u7a0b\u8bed\u8a00\u89e3\u6790JSON，\u4ee5\u53ca\u5982\u4f55\u5728Android\u5ba2\u6237\u7aef\u5904\u7406\u548c\u663e\u793a\u89e3\u6790\u540e\u7684\u6570\u636e\u3002 <\/p>\n

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