![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811171917-689a2615719d6.png\")
<\/p>\n\u57fa\u4e8eGson\u5c01\u88c5\u7684\u5de5\u5177\u7c7b\u53ca\u4f7f\u7528\u793a\u4f8b，\u652f\u6301\u590d\u6742\u6570\u636e\u7ed3\u6784（\u5d4c\u5957\u5bf9\u8c61\u3001\u6cdb\u578b\u96c6\u5408\u7b49），\u5e76\u5305\u542b\u8be6\u7ec6\u6ce8\u91ca\u548c\u6700\u4f73\u5b9e\u8df5<\/p>\n
\u5728\u9879\u76ee\u7684\u00a0build.gradle\u00a0\u4e2d\u6dfb\u52a0\u4f9d\u8d56：<\/p>\n
dependencies {
\n implementation 'com.google.code.gson:gson:2.10.1'
\n}<\/p>\n
import com.google.gson.Gson;
\nimport com.google.gson.GsonBuilder;
\nimport com.google.gson.reflect.TypeToken;
\nimport java.lang.reflect.Type;
\nimport java.util.List;
\nimport java.util.Map;<\/p>\n
\/**
\n * Gson\u5de5\u5177\u7c7b（\u7ebf\u7a0b\u5b89\u5168）
\n * \u529f\u80fd：\u5bf9\u8c61\u4e0eJSON\u4e92\u8f6c\u3001\u6cdb\u578b\u96c6\u5408\u5904\u7406\u3001\u683c\u5f0f\u5316\u8f93\u51fa
\n *\/
\npublic class GsonUtils {
\n \/\/ \u5355\u4f8b\u6a21\u5f0f + \u81ea\u5b9a\u4e49\u914d\u7f6e（\u683c\u5f0f\u5316\/\u5e8f\u5217\u5316\u7a7a\u503c）
\n private static final Gson GSON = new GsonBuilder()
\n .setPrettyPrinting() \/\/ \u683c\u5f0f\u5316JSON（\u4fbf\u4e8e\u9605\u8bfb）
\n .serializeNulls() \/\/ \u5e8f\u5217\u5316null\u503c\u5b57\u6bb5
\n .create();<\/p>\n
\/**
\n * \u5bf9\u8c61\u8f6cJSON\u5b57\u7b26\u4e32
\n * @param object Java\u5bf9\u8c61
\n * @return JSON\u5b57\u7b26\u4e32
\n *\/
\n public static String toJson(Object object) {
\n return GSON.toJson(object);
\n }<\/p>\n
\/**
\n * JSON\u5b57\u7b26\u4e32\u8f6c\u5bf9\u8c61
\n * @param json JSON\u5b57\u7b26\u4e32
\n * @param clazz \u76ee\u6807\u5bf9\u8c61\u7684Class
\n * @param <T> \u76ee\u6807\u7c7b\u578b
\n * @return \u89e3\u6790\u540e\u7684\u5bf9\u8c61
\n *\/
\n public static <T> T fromJson(String json, Class<T> clazz) {
\n return GSON.fromJson(json, clazz);
\n }<\/p>\n
\/**
\n * JSON\u8f6cList（\u652f\u6301\u6cdb\u578b）
\n * @param json JSON\u5b57\u7b26\u4e32
\n * @param clazz List\u5143\u7d20\u7684Class
\n * @param <T> \u5143\u7d20\u7c7b\u578b
\n * @return \u89e3\u6790\u540e\u7684List
\n *\/
\n public static <T> List<T> fromJsonToList(String json, Class<T> clazz) {
\n Type type = TypeToken.getParameterized(List.class, clazz).getType();
\n return GSON.fromJson(json, type);
\n }<\/p>\n
\/**
\n * JSON\u8f6cMap（\u652f\u6301\u6cdb\u578b）
\n * @param json JSON\u5b57\u7b26\u4e32
\n * @return \u89e3\u6790\u540e\u7684Map
\n *\/
\n public static <K, V> Map<K, V> fromJsonToMap(String json) {
\n Type type = new TypeToken<Map<K, V>>() {}.getType();
\n return GSON.fromJson(json, type);
\n }
\n}<\/p>\n
public class User {
\n private String name;
\n private int age;
\n private Address address; \/\/ \u5d4c\u5957\u5bf9\u8c61
\n private List<String> hobbies; \/\/ List\u5b57\u6bb5
\n private Map<String, String> metadata; \/\/ Map\u5b57\u6bb5<\/p>\n
\/\/ \u5fc5\u987b\u6709\u65e0\u53c2\u6784\u9020\u65b9\u6cd5（Gson\u53cd\u5e8f\u5217\u5316\u9700\u8981）[2](@ref)
\n public User() {}<\/p>\n
\/\/ Getter\/Setter\u65b9\u6cd5\u7701\u7565（\u5b9e\u9645\u5f00\u53d1\u4e2d\u9700\u8865\u5145）
\n}<\/p>\n
public class Address {
\n private String city;
\n private String zipCode;<\/p>\n
public Address() {}
\n \/\/ Getter\/Setter\u7701\u7565
\n}<\/p>\n
\/\/ \u6784\u5efa\u590d\u6742\u5bf9\u8c61
\nAddress address = new Address("New York", "10001");
\nList<String> hobbies = Arrays.asList("Reading", "Traveling");
\nMap<String, String> metadata = new HashMap<>();
\nmetadata.put("role", "admin");
\nmetadata.put("department", "IT");<\/p>\n
User user = new User("John", 25, "john@example.com", address, hobbies, metadata);<\/p>\n
\/\/ \u8f6c\u6362\u4e3aJSON（\u683c\u5f0f\u5316\u8f93\u51fa）
\nString json = GsonUtils.toJson(user);
\nSystem.out.println(json);<\/p>\n
{
\n "name": "John",
\n "age": 25,
\n "email": "john@example.com",
\n "address": {
\n "city": "New York",
\n "zipCode": "10001"
\n },
\n "hobbies": ["Reading", "Traveling"],
\n "metadata": {
\n "role": "admin",
\n "department": "IT"
\n }
\n}<\/p>\n
\/\/ JSON\u5b57\u7b26\u4e32\u8f6c\u5bf9\u8c61
\nString json = "{\\\\"name\\\\":\\\\"Alice\\\\",\\\\"age\\\\":30,\\\\"address\\\\":{\\\\"city\\\\":\\\\"Paris\\\\"}}";
\nUser user = GsonUtils.fromJson(json, User.class);
\nSystem.out.println(user.getAddress().getCity()); \/\/ \u8f93\u51fa：Paris<\/p>\n
\/\/ JSON\u8f6cList（\u6cdb\u578b\u652f\u6301）
\nString listJson = "[{\\\\"name\\\\":\\\\"Bob\\\\"}, {\\\\"name\\\\":\\\\"Charlie\\\\"}]";
\nList<User> userList = GsonUtils.fromJsonToList(listJson, User.class);
\nSystem.out.println(userList.size()); \/\/ \u8f93\u51fa：2<\/p>\n
\/\/ JSON\u8f6cMap
\nString mapJson = "{\\\\"key1\\\\":\\\\"value1\\\\", \\\\"key2\\\\":\\\\"value2\\\\"}";
\nMap<String, String> map = GsonUtils.fromJsonToMap(mapJson);
\nSystem.out.println(map.get("key2")); \/\/ \u8f93\u51fa：value2<\/p>\n
1.\u5b9a\u5236\u5de5\u5177\u7c7b<\/p>\n
public final class JSONUtils {
\n \/\/\u89e3\u6790jsonobject,\u4ee5{}\u5f00\u5934\u548c\u7ed3\u5c3e
\npublic static <T> T parseJSON(String jsonStr, Class<T> t) {
\nGson gson = new Gson();
\nT bean = gson.fromJson(jsonStr, t);
\nreturn bean;
\n}<\/p>\n
\/**
\n * \/\/jsonarry,\u4ee5[]\u5f00\u5934\u548c\u7ed3\u5c3e
\n * @param response
\n * @param type
\n * Type type = new TypeToken< ArrayList<\u5b9e\u4f53\u7c7b\u540d>>() { }.getType();
\n\/\/ *
\n * @return
\n *\/
\npublic static <T> T parseJSONArray(String response, Type type) {
\nGson gson = new Gson();
\nT data = gson.fromJson(response, type);
\nreturn data;
\n}
\n\/\/\u628amap\u8f6c\u4e3aString,\u5f88\u5c11\u7528
\npublic static <T> String mapToJson(Map<String, T> map) {
\nGson gson = new Gson();
\nString jsonStr = gson.toJson(map);
\nreturn jsonStr;
\n}<\/p>\n
}<\/p>\n
2.Java Bean<\/p>\n
public class Man {<\/p>\n
\/**
\n * name : \u5f20\u4e09
\n * age : 18
\n *\/<\/p>\n
private String name;
\n private int age;<\/p>\n
public String getName() {
\n return name;
\n }<\/p>\n
public void setName(String name) {
\n this.name = name;
\n }<\/p>\n
public int getAge() {
\n return age;
\n }<\/p>\n
public void setAge(int age) {
\n this.age = age;
\n }
\n}<\/p>\n
2.\u51c6\u5907\u5b57\u7b26\u4e32\u6570\u636e<\/p>\n
{"error_code":10005,"reason":"\u5e94\u7528\u672a\u5ba1\u6838\u8d85\u65f6，\u8bf7\u63d0\u4ea4\u8ba4\u8bc1"}<\/p>\n
3.\u89e3\u6790\u5b57\u7b26\u4e32\u6570\u636e<\/p>\n
Man man = JSONUtils.parseJSON(ST, Man.class);
\n \/\/\u83b7\u5f97\u9519\u8bef\u7801
\n int error_code = man.getError_code();
\n \/\/\u9519\u8bef\u539f\u56e0
\n String reason = man.getReason();<\/p>\n
4.\u51c6\u5907\u6570\u7ec4\u6570\u636e
\n[
\n {
\n "name": "\u5f20\u4e09",
\n "age": 18
\n },
\n {
\n "name": "\u674e\u56db",
\n "age": 19
\n }
\n]<\/p>\n
5.\u89e3\u6790\u6570\u7ec4\u6570\u636e<\/p>\n
Type type = new TypeToken<ArrayList<Man>>() { }.getType();
\n \/\/\u83b7\u5f97\u4e86\u4e00\u4e2aMan(\u7c7b\u540d)\u7684\u96c6\u5408
\n ArrayList<Man> first = JSONUtils.parseJSONArray(st, type);
\n \/\/\u83b7\u5f97\u7b2c\u4e00\u4e2a\u4eba\u7684\u5e74\u9f84
\n int age = first.get(0).getAge();
\n Log.e("888", ""+age);
\n \u6253\u5370\u4e0b\u662f18\u5c81\u54e6！<\/p>\n
\u6ce8\u610f\u5bfc\u5305\u5bfc\u8fd9\u4e2a，\u4e0d\u7136\u4f1a\u51fa\u9519
\nimport java.lang.reflect.Type;
\nimport com.google.gson.reflect.TypeToken;<\/p>\n
\u5728\u9879\u76ee\u7684\u00a0build.gradle\u00a0\u4e2d\u6dfb\u52a0\u4f9d\u8d56：<\/p>\n
\/\/jackson-databind：\u6838\u5fc3\u5e93（\u81ea\u52a8\u5305\u542bjackson-core\u548cjackson-annotations）
\n\/\/jackson-datatype-jsr310：\u652f\u6301LocalDateTime\u7b49Java 8\u65e5\u671f\u7c7b\u578b<\/p>\n
dependencies {
\n implementation 'com.fasterxml.jackson.core:jackson-databind:2.15.2'
\n implementation 'com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.15.2'
\n}<\/p>\n
import com.fasterxml.jackson.core.JsonProcessingException;
\nimport com.fasterxml.jackson.core.type.TypeReference;
\nimport com.fasterxml.jackson.databind.*;
\nimport com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
\nimport java.text.SimpleDateFormat;
\nimport java.util.List;
\nimport java.util.Map;<\/p>\n
public class JacksonUtil {
\n private static final ObjectMapper mapper = new ObjectMapper();<\/p>\n
static {
\n \/\/ \u57fa\u7840\u914d\u7f6e
\n mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); \/\/ \u5ffd\u7565\u672a\u77e5\u5b57\u6bb5[6](@ref)
\n mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); \/\/ \u5ffd\u7565null\u5b57\u6bb5[7](@ref)
\n mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")); \/\/ \u7edf\u4e00\u65e5\u671f\u683c\u5f0f<\/p>\n
\/\/ \u6ce8\u518cJava 8\u65e5\u671f\u6a21\u5757
\n mapper.registerModule(new JavaTimeModule());
\n mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS); \/\/ \u7981\u7528\u65f6\u95f4\u6233\u683c\u5f0f[7](@ref)
\n }<\/p>\n
\/\/ \u5bf9\u8c61 \u2192 JSON\u5b57\u7b26\u4e32
\n public static String toJson(Object obj) {
\n try {
\n return mapper.writeValueAsString(obj);
\n } catch (JsonProcessingException e) {
\n throw new RuntimeException("JSON\u5e8f\u5217\u5316\u5931\u8d25", e);
\n }
\n }<\/p>\n
\/\/ JSON\u5b57\u7b26\u4e32 \u2192 \u5bf9\u8c61
\n public static <T> T toObject(String json, Class<T> clazz) {
\n try {
\n return mapper.readValue(json, clazz);
\n } catch (JsonProcessingException e) {
\n throw new RuntimeException("JSON\u53cd\u5e8f\u5217\u5316\u5931\u8d25", e);
\n }
\n }<\/p>\n
\/\/ JSON\u5b57\u7b26\u4e32 \u2192 \u590d\u6742\u96c6\u5408（\u5982List<User>）
\n public static <T> List<T> toList(String json, Class<T> elementClass) {
\n try {
\n return mapper.readValue(json, mapper.getTypeFactory().constructCollectionType(List.class, elementClass));
\n } catch (JsonProcessingException e) {
\n throw new RuntimeException("JSON\u8f6cList\u5931\u8d25", e);
\n }
\n }<\/p>\n
\/\/ JSON\u5b57\u7b26\u4e32 \u2192 \u5d4c\u5957\u7ed3\u6784（\u5982Map<String, List<Order>>）
\n public static <T> T toComplexObject(String json, TypeReference<T> typeRef) {
\n try {
\n return mapper.readValue(json, typeRef);
\n } catch (JsonProcessingException e) {
\n throw new RuntimeException("\u590d\u6742\u7ed3\u6784\u8f6c\u6362\u5931\u8d25", e);
\n }
\n }
\n}<\/p>\n
\/\/ \u5b9a\u4e49\u5b9e\u4f53\u7c7b
\npublic class User {
\n private String name;
\n private Integer age;
\n private LocalDateTime createTime;
\n \/\/ Getter\/Setter\u7701\u7565
\n}<\/p>\n
\/\/ \u5e8f\u5217\u5316\u5bf9\u8c61 \u2192 JSON
\nUser user = new User("\u5f20\u4e09", 25, LocalDateTime.now());
\nString json = JacksonUtil.toJson(user);
\n\/\/ \u8f93\u51fa: {"name":"\u5f20\u4e09","age":25,"createTime":"2025-08-03 14:30:00"} [3](@ref)<\/p>\n
\/\/ \u53cd\u5e8f\u5217\u5316 JSON \u2192 \u5bf9\u8c61
\nUser parsedUser = JacksonUtil.toObject(json, User.class);
\nSystem.out.println(parsedUser.getName()); \/\/ \u8f93\u51fa: \u5f20\u4e09<\/p>\n
\/\/ List\u5e8f\u5217\u5316
\nList<User> userList = Arrays.asList(
\n new User("\u674e\u56db", 30, null),
\n new User("\u738b\u4e94", 28, LocalDateTime.now())
\n);
\nString listJson = JacksonUtil.toJson(userList);
\n\/\/ \u8f93\u51fa: [{"name":"\u674e\u56db","age":30},{"name":"\u738b\u4e94","age":28,"createTime":"2025-08-03 14:35:00"}]<\/p>\n
\/\/ List\u53cd\u5e8f\u5217\u5316
\nList<User> parsedList = JacksonUtil.toList(listJson, User.class);<\/p>\n
<\/p>\n
\u5728\u9879\u76ee\u7684\u00a0build.gradle\u00a0\u4e2d\u6dfb\u52a0\u4f9d\u8d56：<\/p>\n
\/\/jackson-databind：\u6838\u5fc3\u5e93（\u81ea\u52a8\u5305\u542bjackson-core\u548cjackson-annotations）
\n\/\/jackson-datatype-jsr310：\u652f\u6301LocalDateTime\u7b49Java 8\u65e5\u671f\u7c7b\u578b<\/p>\n
dependencies {
\n implementation 'com.alibaba:fastjson:2.0.39'
\n}<\/p>\n
import com.alibaba.fastjson2.*;
\nimport com.alibaba.fastjson2.filter.Filter;
\nimport java.util.List;<\/p>\n
public class FastJsonUtil {
\n private static final ParserConfig SAFE_PARSER_CONFIG;<\/p>\n
static {
\n \/\/ \u5b89\u5168\u914d\u7f6e：\u542f\u7528\u5b89\u5168\u6a21\u5f0f，\u7981\u6b62\u53cd\u5e8f\u5217\u5316\u4efb\u610f\u7c7b [7](@ref)
\n SAFE_PARSER_CONFIG = new ParserConfig();
\n SAFE_PARSER_CONFIG.setSafeMode(true);<\/p>\n
\/\/ \u53ef\u9009：\u8bbe\u7f6e\u767d\u540d\u5355（\u4ec5\u5141\u8bb8\u6307\u5b9a\u5305\u4e0b\u7684\u7c7b）[7](@ref)
\n SAFE_PARSER_CONFIG.addAccept("com.yourpackage.model.");
\n }<\/p>\n
\/\/ \u5bf9\u8c61 \u2192 JSON \u5b57\u7b26\u4e32（\u9ed8\u8ba4\u914d\u7f6e）
\n public static String toJson(Object obj) {
\n return JSON.toJSONString(obj);
\n }<\/p>\n
\/\/ \u5bf9\u8c61 \u2192 JSON \u5b57\u7b26\u4e32（\u81ea\u5b9a\u4e49\u914d\u7f6e）
\n public static String toJson(Object obj, JSONWriter.Feature… features) {
\n return JSON.toJSONString(obj, features);
\n }<\/p>\n
\/\/ JSON \u5b57\u7b26\u4e32 \u2192 \u5bf9\u8c61（\u5b89\u5168\u6a21\u5f0f）
\n public static <T> T toBean(String json, Class<T> clazz) {
\n return JSON.parseObject(json, clazz, SAFE_PARSER_CONFIG);
\n }<\/p>\n
\/\/ JSON \u5b57\u7b26\u4e32 \u2192 \u6cdb\u578b\u96c6\u5408（\u5982 List<User>）
\n public static <T> List<T> toList(String json, Class<T> clazz) {
\n return JSON.parseArray(json, clazz, SAFE_PARSER_CONFIG);
\n }<\/p>\n
\/\/ JSON \u5b57\u7b26\u4e32 \u2192 \u590d\u6742\u5d4c\u5957\u7ed3\u6784（\u5982 Map<String, List>）
\n public static <T> T toComplexType(String json, TypeReference<T> typeRef) {
\n return JSON.parseObject(json, typeRef, SAFE_PARSER_CONFIG);
\n }
\n}<\/p>\n
\/\/ \u5b9a\u4e49\u5b9e\u4f53\u7c7b
\npublic class User {
\n @JSONField(name = "user_name") \/\/ \u81ea\u5b9a\u4e49\u5b57\u6bb5\u540d [6,7](@ref)
\n private String name;<\/p>\n
@JSONField(serialize = false) \/\/ \u5ffd\u7565\u5e8f\u5217\u5316 [6](@ref)
\n private String password;<\/p>\n
@JSONField(format = "yyyy-MM-dd") \/\/ \u65e5\u671f\u683c\u5f0f\u5316 [7](@ref)
\n private Date birthDate;<\/p>\n
\/\/ Getter\/Setter \u7701\u7565
\n}<\/p>\n
\/\/ \u5e8f\u5217\u5316\u5bf9\u8c61 \u2192 JSON
\nUser user = new User("\u5f20\u4e09", "123456", new Date());
\nString json = FastJsonUtil.toJson(user);
\n\/\/ \u8f93\u51fa：{"user_name":"\u5f20\u4e09","birthDate":"2025-08-03"}<\/p>\n
\/\/ \u53cd\u5e8f\u5217\u5316 JSON \u2192 \u5bf9\u8c61
\nUser parsedUser = FastJsonUtil.toBean(json, User.class);
\nSystem.out.println(parsedUser.getName()); \/\/ \u8f93\u51fa：\u5f20\u4e09<\/p>\n
\/\/ List \u5e8f\u5217\u5316\u4e0e\u53cd\u5e8f\u5217\u5316
\nList<User> userList = Arrays.asList(
\n new User("\u674e\u56db", null, null),
\n new User("\u738b\u4e94", "abc", new Date())
\n);
\nString listJson = FastJsonUtil.toJson(userList, JSONWriter.Feature.PrettyFormat);<\/p>\n
List<User> parsedList = FastJsonUtil.toList(listJson, User.class);<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb179\u6b21\uff0c\u70b9\u8d5e8\u6b21\uff0c\u6536\u85cf2\u6b21\u3002\u200b\u4e00\u3001\u4f9d\u8d56\u914d\u7f6e\u200b\u3002<\/p>\n","protected":false},"author":2,"featured_media":53143,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[84,93],"topic":[],"class_list":["post-53144","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-android","tag-json"],"yoast_head":"\n