在VS Code IDE中增加一个具有运算模块的插件 - 用 Java 语言实现

VS Code中集成Java运算模块插件的完整实现方案

与Delphi相比，Java与VS Code的集成更加自然，因为两者都是基于现代开发栈。我将从技术架构到具体实现详细说明。

一、技术架构概览

1.1 核心架构图

Java计算引擎(JAR/Spring Boot)
← HTTP/RPC/Java进程 →
TypeScript/JavaScript适配层
← VS Code API →
IDE用户界面

1.2 实现方案比较

二、推荐架构：混合模式

根据需求分层实现：

• 轻量级计算：TypeScript直接实现
• 中等复杂度：Java子进程调用
• 复杂/已有逻辑：REST API或Language Server

三、完整实现步骤

第一阶段：VS Code插件基础配置

1.1 创建插件项目结构

java-calculator-extension/
├── package.json # 插件清单
├── tsconfig.json # TypeScript配置
├── webpack.config.js # 打包配置
├── src/
│ ├── extension.ts # 插件入口
│ ├── java/
│ │ ├── JavaCalculatorClient.ts
│ │ └── JavaProcessManager.ts
│ ├── ui/
│ │ ├── CalculatorPanel.ts
│ │ └── ResultView.ts
│ ├── providers/
│ │ ├── HoverProvider.ts
│ │ ├── CompletionProvider.ts
│ │ └── CodeActionProvider.ts
│ └── commands/
│ ├── CalculateCommand.ts
│ └── OpenPanelCommand.ts
├── java/
│ ├── calculator-core/ # Maven/Gradle项目
│ └── calculator-server/ # Spring Boot服务
├── resources/
│ ├── calculator.html
│ └── styles/
└── out/ # 编译输出

1.2 核心package.json配置

{
"name": "java-calculator",
"displayName": "Java Calculator Extension",
"version": "1.0.0",
"publisher": "your-company",
"engines": {
"vscode": "^1.75.0"
},
"categories": ["Other"],
"activationEvents": [
"onStartupFinished",
"onCommand:javaCalculator.calculate",
"onLanguage:java",
"onLanguage:javascript",
"onLanguage:python"
],
"main": "./out/extension.js",
"browser": "./out/web/extension.js",
"contributes": {
"commands": [
{
"command": "javaCalculator.calculate",
"title": "Calculate with Java",
"category": "Java Calculator"
},
{
"command": "javaCalculator.openPanel",
"title": "Open Calculator Panel"
}
],
"menus": {
"editor/context": [
{
"command": "javaCalculator.calculate",
"when": "editorHasSelection",
"group": "navigation"
}
],
"view/title": [
{
"command": "javaCalculator.openPanel",
"when": "view == javaCalculatorView",
"group": "navigation"
}
]
},
"views": {
"explorer": [
{
"id": "javaCalculatorView",
"name": "Java Calculator"
}
]
},
"viewsContainers": {
"activitybar": [
{
"id": "java-calculator",
"title": "Java Calc",
"icon": "resources/icon.svg"
}
]
},
"configuration": {
"title": "Java Calculator",
"properties": {
"javaCalculator.enable": {
"type": "boolean",
"default": true,
"description": "Enable Java Calculator"
},
"javaCalculator.javaPath": {
"type": "string",
"default": "java",
"description": "Path to Java executable"
},
"javaCalculator.serverPort": {
"type": "number",
"default": 7070,
"description": "Port for Java server"
},
"javaCalculator.maxHeapSize": {
"type": "string",
"default": "512m",
"description": "Max heap size for Java process"
}
}
}
},
"scripts": {
"vscode:prepublish": "npm run compile",
"compile": "tsc -p ./",
"watch": "tsc -watch -p ./",
"lint": "eslint src –ext ts",
"test": "npm run compile && node ./out/test/runTest.js",
"package": "vsce package",
"publish": "vsce publish"
},
"dependencies": {
"axios": "^1.3.0",
"socket.io-client": "^4.5.0",
"vscode-languageclient": "^8.0.0",
"vscode-languageserver": "^8.0.0",
"web-worker": "^1.2.0"
},
"devDependencies": {
"@types/node": "^18.0.0",
"@types/vscode": "^1.75.0",
"@typescript-eslint/eslint-plugin": "^5.0.0",
"@typescript-eslint/parser": "^5.0.0",
"eslint": "^8.0.0",
"typescript": "^4.9.0",
"vsce": "^2.0.0"
}
}

第二阶段：Java计算模块实现

2.1 基础计算核心（Maven项目）

<!– pom.xml –>
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>calculator-core</artifactId>
<version>1.0.0</version>

<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>3.6.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.14.0</version>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.3.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.example.calculator.CalculatorCLI</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

2.2 Java计算引擎实现

// CalculatorEngine.java
package com.example.calculator;

import org.apache.commons.math3.complex.Complex;
import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.util.Map;
import java.util.HashMap;
import java.math.BigDecimal;
import java.math.RoundingMode;

public class CalculatorEngine {

private static final ObjectMapper mapper = new ObjectMapper();

public static class CalculationRequest {
private String expression;
private Map<String, Object> variables;
private int precision = 10;
// getters and setters
}

public static class CalculationResult {
private boolean success;
private Object result;
private String error;
private long executionTime;
// getters and setters
}

public CalculationResult evaluate(CalculationRequest request) {
long startTime = System.nanoTime();
CalculationResult result = new CalculationResult();

try {
// 解析表达式
Object calculated = evaluateExpression(
request.getExpression(),
request.getVariables()
);

// 精度处理
if (calculated instanceof BigDecimal) {
calculated = ((BigDecimal) calculated)
.setScale(request.getPrecision(), RoundingMode.HALF_UP);
}

result.setSuccess(true);
result.setResult(calculated);

} catch (Exception e) {
result.setSuccess(false);
result.setError(e.getMessage());
}

result.setExecutionTime(System.nanoTime() – startTime);
return result;
}

private Object evaluateExpression(String expr, Map<String, Object> vars) {
// 使用Apache Commons Math或自定义解析器
if (expr.contains("+")) {
String[] parts = expr.split("\\\\+");
BigDecimal sum = BigDecimal.ZERO;
for (String part : parts) {
sum = sum.add(new BigDecimal(evaluatePart(part, vars).toString()));
}
return sum;
}
// 更多运算符实现…
return expr;
}

// 统计计算功能
public Map<String, Object> statisticalAnalysis(double[] data) {
Map<String, Object> stats = new HashMap<>();
DescriptiveStatistics ds = new DescriptiveStatistics(data);

stats.put("mean", ds.getMean());
stats.put("median", ds.getPercentile(50));
stats.put("stdDev", ds.getStandardDeviation());
stats.put("variance", ds.getVariance());
stats.put("min", ds.getMin());
stats.put("max", ds.getMax());
stats.put("sum", ds.getSum());

return stats;
}

// 复数计算
public Complex complexOperation(String op, Complex a, Complex b) {
switch (op) {
case "add": return a.add(b);
case "subtract": return a.subtract(b);
case "multiply": return a.multiply(b);
case "divide": return a.divide(b);
default: throw new IllegalArgumentException("Unknown operation: " + op);
}
}
}

2.3 Spring Boot REST API服务器

// CalculatorApplication.java
package com.example.calculator;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.*;
import org.springframework.http.ResponseEntity;

@SpringBootApplication
@RestController
@RequestMapping("/api/v1")
public class CalculatorApplication {

private final CalculatorEngine engine = new CalculatorEngine();

@PostMapping("/calculate")
public ResponseEntity<?> calculate(@RequestBody CalculatorEngine.CalculationRequest request) {
CalculatorEngine.CalculationResult result = engine.evaluate(request);
return ResponseEntity.ok(result);
}

@PostMapping("/stats")
public ResponseEntity<?> statistics(@RequestBody double[] data) {
return ResponseEntity.ok(engine.statisticalAnalysis(data));
}

@PostMapping("/matrix")
public ResponseEntity<?> matrixOperation(@RequestBody MatrixRequest request) {
// 矩阵运算实现
return ResponseEntity.ok(performMatrixOperation(request));
}

@GetMapping("/health")
public ResponseEntity<?> healthCheck() {
return ResponseEntity.ok(Map.of("status", "healthy", "timestamp", System.currentTimeMillis()));
}

public static void main(String[] args) {
SpringApplication.run(CalculatorApplication.class, args);
}
}

2.4 命令行接口（CLI）

// CalculatorCLI.java
package com.example.calculator;

import com.fasterxml.jackson.databind.ObjectMapper;

public class CalculatorCLI {
public static void main(String[] args) {
ObjectMapper mapper = new ObjectMapper();
CalculatorEngine engine = new CalculatorEngine();

try {
if (args.length > 0) {
CalculatorEngine.CalculationRequest request = mapper.readValue(
args[0], CalculatorEngine.CalculationRequest.class
);

CalculatorEngine.CalculationResult result = engine.evaluate(request);

System.out.println(mapper.writeValueAsString(result));

// 非零退出码表示错误
if (!result.isSuccess()) {
System.exit(1);
}
}
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
System.exit(2);
}
}
}

第三阶段：VS Code插件实现

3.1 Java进程管理器

// src/java/JavaProcessManager.ts
import * as cp from 'child_process';
import * as path from 'path';
import * as vscode from 'vscode';
import { EventEmitter } from 'events';

export class JavaProcessManager extends EventEmitter {
private javaProcess: cp.ChildProcess | null = null;
private isServerRunning: boolean = false;
private serverPort: number;
private javaPath: string;

constructor() {
super();
const config = vscode.workspace.getConfiguration('javaCalculator');
this.serverPort = config.get<number>('serverPort') || 7070;
this.javaPath = config.get<string>('javaPath') || 'java';
}

async startJavaServer(): Promise<boolean> {
return new Promise((resolve, reject) => {
try {
const jarPath = path.join(__dirname, '../../java/calculator-server/target/calculator-server.jar');

this.javaProcess = cp.spawn(this.javaPath, [
`-Xmx${this.getHeapSize()}`,
'-jar',
jarPath,
`–server.port=${this.serverPort}`
], {
cwd: path.dirname(jarPath),
stdio: ['pipe', 'pipe', 'pipe']
});

this.javaProcess.stdout?.on('data', (data) => {
const output = data.toString();
console.log(`Java Server: ${output}`);

if (output.includes('Started CalculatorApplication')) {
this.isServerRunning = true;
this.emit('server-ready');
resolve(true);
}
});

this.javaProcess.stderr?.on('data', (data) => {
console.error(`Java Server Error: ${data}`);
});

this.javaProcess.on('close', (code) => {
this.isServerRunning = false;
this.emit('server-stopped', code);
});

// 超时处理
setTimeout(() => {
if (!this.isServerRunning) {
reject(new Error('Java server startup timeout'));
}
}, 30000);

} catch (error) {
reject(error);
}
});
}

async executeCalculation(expression: string): Promise<any> {
if (this.isServerRunning) {
return this.callRESTAPI(expression);
} else {
return this.callCLI(expression);
}
}

private async callCLI(expression: string): Promise<any> {
return new Promise((resolve, reject) => {
const jarPath = path.join(__dirname, '../../java/calculator-core/target/calculator-core.jar');

const request = JSON.stringify({
expression: expression,
precision: 10
});

const child = cp.spawn(this.javaPath, ['-jar', jarPath, request]);
let output = '';
let error = '';

child.stdout.on('data', (data) => output += data);
child.stderr.on('data', (data) => error += data);

child.on('close', (code) => {
if (code === 0) {
try {
resolve(JSON.parse(output));
} catch (e) {
reject(new Error(`Parse error: ${e.message}`));
}
} else {
reject(new Error(`CLI error: ${error}`));
}
});
});
}

private async callRESTAPI(expression: string): Promise<any> {
const axios = require('axios');
try {
const response = await axios.post(
`http://localhost:${this.serverPort}/api/v1/calculate`,
{
expression: expression,
variables: {},
precision: 10
},
{
timeout: 5000,
headers: { 'Content-Type': 'application/json' }
}
);
return response.data;
} catch (error) {
throw new Error(`REST API error: ${error.message}`);
}
}

private getHeapSize(): string {
const config = vscode.workspace.getConfiguration('javaCalculator');
return config.get<string>('maxHeapSize') || '512m';
}

stopServer(): void {
if (this.javaProcess) {
this.javaProcess.kill('SIGTERM');
this.isServerRunning = false;
}
}

getStatus(): { running: boolean; port: number } {
return {
running: this.isServerRunning,
port: this.serverPort
};
}
}

3.2 插件主入口

// src/extension.ts
import * as vscode from 'vscode';
import { JavaProcessManager } from './java/JavaProcessManager';
import { CalculatorPanel } from './ui/CalculatorPanel';
import { HoverProvider } from './providers/HoverProvider';
import { registerCommands } from './commands/CalculateCommand';

let processManager: JavaProcessManager;
let statusBarItem: vscode.StatusBarItem;

export async function activate(context: vscode.ExtensionContext) {
console.log('Java Calculator extension is now active!');

// 初始化Java进程管理器
processManager = new JavaProcessManager();

// 创建状态栏项目
statusBarItem = vscode.window.createStatusBarItem(
vscode.StatusBarAlignment.Right,
100
);
statusBarItem.text = "$(calculator) Java Calc";
statusBarItem.tooltip = "Java Calculator – Ready";
statusBarItem.command = 'javaCalculator.openPanel';
statusBarItem.show();

// 启动Java服务器
try {
await processManager.startJavaServer();
statusBarItem.text = "$(check) Java Calc";
vscode.window.showInformationMessage('Java计算服务器已启动');
} catch (error) {
statusBarItem.text = "$(error) Java Calc";
vscode.window.showWarningMessage('Java服务器启动失败，将使用CLI模式');
}

// 注册命令
const commands = registerCommands(processManager);
context.subscriptions.push(…commands);

// 注册悬停提示提供者
const hoverProvider = vscode.languages.registerHoverProvider(
[
{ language: 'javascript' },
{ language: 'typescript' },
{ language: 'java' },
{ language: 'python' }
],
new HoverProvider(processManager)
);

// 注册代码补全提供者
const completionProvider = vscode.languages.registerCompletionItemProvider(
{ language: 'javascript' },
{
provideCompletionItems(document, position) {
const linePrefix = document.lineAt(position).text.substring(0, position.character);
if (!linePrefix.includes('// calculate:')) {
return undefined;
}

const suggestions = [
'sum',
'average',
'stdDev',
'variance',
'matrixMult'
].map(item => {
const completion = new vscode.CompletionItem(
item,
vscode.CompletionItemKind.Function
);
completion.detail = 'Java Calculator Function';
return completion;
});

return suggestions;
}
}
);

// 注册配置变更监听
const configListener = vscode.workspace.onDidChangeConfiguration(e => {
if (e.affectsConfiguration('javaCalculator')) {
vscode.window.showInformationMessage('Java Calculator配置已更新，部分更改需要重启');
}
});

// 注册到订阅列表
context.subscriptions.push(
statusBarItem,
hoverProvider,
completionProvider,
configListener,
{
dispose: () => processManager.stopServer()
}
);
}

export function deactivate() {
if (processManager) {
processManager.stopServer();
}
if (statusBarItem) {
statusBarItem.dispose();
}
}

3.3 计算命令实现

// src/commands/CalculateCommand.ts
import * as vscode from 'vscode';
import { JavaProcessManager } from '../java/JavaProcessManager';

export function registerCommands(processManager: JavaProcessManager): vscode.Disposable[] {
const disposables: vscode.Disposable[] = [];

// 基础计算命令
const calculateCommand = vscode.commands.registerCommand(
'javaCalculator.calculate',
async () => {
const editor = vscode.window.activeTextEditor;
if (!editor) {
vscode.window.showErrorMessage('没有活动的编辑器');
return;
}

const selection = editor.selection;
const text = editor.document.getText(selection);

if (!text.trim()) {
vscode.window.showErrorMessage('请先选择要计算的表达式');
return;
}

try {
vscode.window.withProgress({
location: vscode.ProgressLocation.Notification,
title: "Java计算中…",
cancellable: false
}, async (progress) => {
progress.report({ increment: 0 });

const result = await processManager.executeCalculation(text);

progress.report({ increment: 100 });

if (result.success) {
// 显示结果
await showCalculationResult(editor, selection, result.result);
} else {
vscode.window.showErrorMessage(`计算错误: ${result.error}`);
}
});
} catch (error) {
vscode.window.showErrorMessage(`计算失败: ${error.message}`);
}
}
);

// 打开计算面板命令
const openPanelCommand = vscode.commands.registerCommand(
'javaCalculator.openPanel',
() => {
CalculatorPanel.createOrShow(context.extensionUri, processManager);
}
);

// 批量计算命令
const batchCalculateCommand = vscode.commands.registerCommand(
'javaCalculator.batchCalculate',
async () => {
const input = await vscode.window.showInputBox({
prompt: '输入多个表达式（每行一个）',
placeHolder: '2+2\\n3*4\\nsqrt(16)'
});

if (input) {
const expressions = input.split('\\n').filter(expr => expr.trim());
const results = [];

for (const expr of expressions) {
try {
const result = await processManager.executeCalculation(expr);
results.push(`${expr} = ${result.success ? result.result : 'Error'}`);
} catch (error) {
results.push(`${expr} = Error: ${error.message}`);
}
}

const doc = await vscode.workspace.openTextDocument({
content: results.join('\\n'),
language: 'plaintext'
});

await vscode.window.showTextDocument(doc);
}
}
);

disposables.push(calculateCommand, openPanelCommand, batchCalculateCommand);
return disposables;
}

async function showCalculationResult(
editor: vscode.TextEditor,
selection: vscode.Selection,
result: any
): Promise<void> {
const resultStr = String(result);

// 提供多种结果显示方式
const actions = ['插入到文档', '显示通知', '复制到剪贴板', '在面板中查看'];
const selected = await vscode.window.showQuickPick(actions, {
placeHolder: `结果: ${resultStr}`
});

switch (selected) {
case '插入到文档':
await editor.edit(editBuilder => {
editBuilder.insert(selection.end, ` = ${resultStr}`);
});
break;

case '显示通知':
vscode.window.showInformationMessage(`计算结果: ${resultStr}`);
break;

case '复制到剪贴板':
await vscode.env.clipboard.writeText(resultStr);
vscode.window.showInformationMessage('结果已复制到剪贴板');
break;

case '在面板中查看':
// 打开计算面板
break;
}
}

3.4 Webview计算面板

// src/ui/CalculatorPanel.ts
import * as vscode from 'vscode';
import * as path from 'path';
import { JavaProcessManager } from '../java/JavaProcessManager';

export class CalculatorPanel {
public static currentPanel: CalculatorPanel | undefined;
private readonly _panel: vscode.WebviewPanel;
private readonly _extensionUri: vscode.Uri;
private readonly _processManager: JavaProcessManager;
private _disposables: vscode.Disposable[] = [];

public static createOrShow(extensionUri: vscode.Uri, processManager: JavaProcessManager) {
const column = vscode.window.activeTextEditor?.viewColumn || vscode.ViewColumn.One;

if (CalculatorPanel.currentPanel) {
CalculatorPanel.currentPanel._panel.reveal(column);
return;
}

const panel = vscode.window.createWebviewPanel(
'javaCalculator',
'Java Calculator',
column,
{
enableScripts: true,
retainContextWhenHidden: true,
localResourceRoots: [
vscode.Uri.joinPath(extensionUri, 'resources')
]
}
);

CalculatorPanel.currentPanel = new CalculatorPanel(panel, extensionUri, processManager);
}

private constructor(
panel: vscode.WebviewPanel,
extensionUri: vscode.Uri,
processManager: JavaProcessManager
) {
this._panel = panel;
this._extensionUri = extensionUri;
this._processManager = processManager;

this._updateWebview();
this._setupMessageHandlers();

this._panel.onDidDispose(() => this.dispose(), null, this._disposables);
}

private _updateWebview() {
this._panel.webview.html = this._getHtmlForWebview();
}

private _getHtmlForWebview(): string {
const scriptUri = this._panel.webview.asWebviewUri(
vscode.Uri.joinPath(this._extensionUri, 'resources', 'calculator.js')
);

const styleUri = this._panel.webview.asWebviewUri(
vscode.Uri.joinPath(this._extensionUri, 'resources', 'styles', 'calculator.css')
);

return `
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="${styleUri}" rel="stylesheet">
<title>Java Calculator</title>
</head>
<body>
<div class="calculator-container">
<div class="header">
<h1>Java Calculator</h1>
<div class="status" id="status">Ready</div>
</div>

<div class="input-section">
<textarea id="expressionInput"
placeholder="Enter expression, e.g., 2 * (3 + 4)^2"
rows="3"></textarea>

<div class="variables">
<h3>Variables</h3>
<div id="variableList"></div>
<button onclick="addVariable()">Add Variable</button>
</div>

<div class="buttons">
<button onclick="calculate()" class="primary">Calculate</button>
<button onclick="clearAll()">Clear</button>
<button onclick="loadExamples()">Load Examples</button>
</div>
</div>

<div class="result-section">
<h3>Result</h3>
<div id="resultDisplay" class="result-display"></div>
<div id="executionTime" class="execution-time"></div>
</div>

<div class="history-section">
<h3>History</h3>
<div id="historyList"></div>
</div>
</div>

<script src="${scriptUri}"></script>
</body>
</html>`;
}

private _setupMessageHandlers() {
this._panel.webview.onDidReceiveMessage(
async (message) => {
switch (message.command) {
case 'calculate':
await this._handleCalculation(message.expression, message.variables);
break;
case 'getStatus':
const status = this._processManager.getStatus();
this._panel.webview.postMessage({
command: 'statusUpdate',
status: status
});
break;
}
},
null,
this._disposables
);
}

private async _handleCalculation(expression: string, variables: any) {
try {
const result = await this._processManager.executeCalculation(expression);

this._panel.webview.postMessage({
command: 'calculationResult',
success: result.success,
result: result.result,
error: result.error,
executionTime: result.executionTime
});

// 更新状态栏
vscode.window.setStatusBarMessage(
`Calculation completed in ${result.executionTime / 1000000}ms`,
3000
);

} catch (error) {
this._panel.webview.postMessage({
command: 'calculationResult',
success: false,
error: error.message
});
}
}

public dispose() {
CalculatorPanel.currentPanel = undefined;
this._panel.dispose();

while (this._disposables.length) {
const disposable = this._disposables.pop();
if (disposable) {
disposable.dispose();
}
}
}
}

第四阶段：高级功能实现

4.1 Language Server Protocol (LSP) 集成

// src/language-server/CalculatorLanguageServer.ts
import * as path from 'path';
import { workspace, ExtensionContext } from 'vscode';
import {
LanguageClient,
LanguageClientOptions,
ServerOptions,
TransportKind
} from 'vscode-languageclient/node';

let client: LanguageClient;

export function activateLanguageServer(context: ExtensionContext) {
const serverModule = context.asAbsolutePath(
path.join('java', 'language-server', 'target', 'calculator-ls.jar')
);

const serverOptions: ServerOptions = {
run: {
command: 'java',
args: ['-jar', serverModule, '–stdio'],
transport: TransportKind.stdio
},
debug: {
command: 'java',
args: [
'-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005',
'-jar',
serverModule,
'–stdio'
],
transport: TransportKind.stdio
}
};

const clientOptions: LanguageClientOptions = {
documentSelector: [
{ scheme: 'file', language: 'plaintext' },
{ scheme: 'untitled', language: 'plaintext' }
],
synchronize: {
fileEvents: workspace.createFileSystemWatcher('**/.calc')
}
};

client = new LanguageClient(
'javaCalculatorLS',
'Java Calculator Language Server',
serverOptions,
clientOptions
);

client.start();
}

export function deactivateLanguageServer(): Thenable<void> | undefined {
if (!client) {
return undefined;
}
return client.stop();
}

4.2 实时协作计算

// src/collaboration/CollaborationManager.ts
import * as vscode from 'vscode';
import * as WebSocket from 'ws';

export class CollaborationManager {
private ws: WebSocket | null = null;
private sessionId: string | null = null;

async createCollaborationSession(): Promise<string> {
const sessionId = this.generateSessionId();

// 连接到协作服务器
this.ws = new WebSocket(`ws://localhost:8080/collaborate/${sessionId}`);

this.ws.on('message', (data) => {
this.handleCollaborationMessage(data.toString());
});

return sessionId;
}

private handleCollaborationMessage(message: string) {
const data = JSON.parse(message);

switch (data.type) {
case 'calculation':
this.broadcastCalculation(data.expression, data.result);
break;
case 'variableUpdate':
this.updateSharedVariables(data.variables);
break;
}
}

private broadcastCalculation(expression: string, result: any) {
vscode.window.showInformationMessage(
`Collaborative calculation: ${expression} = ${result}`
);
}
}

第五阶段：构建与打包

5.1 Webpack配置

// webpack.config.js
const path = require('path');

module.exports = {
target: 'node',
mode: 'production',
entry: './src/extension.ts',
output: {
path: path.resolve(__dirname, 'out'),
filename: 'extension.js',
libraryTarget: 'commonjs2'
},
externals: {
vscode: 'commonjs vscode'
},
resolve: {
extensions: ['.ts', '.js']
},
module: {
rules: [
{
test: /\\.ts$/,
exclude: /node_modules/,
use: 'ts-loader'
}
]
},
optimization: {
minimize: true
}
};

5.2 自动化构建脚本

// package.json 构建脚本部分
{
"scripts": {
"build:java": "cd java/calculator-core && mvn clean package && cd ../calculator-server && mvn clean package",
"build:ts": "webpack –mode production",
"build:all": "npm run build:java && npm run build:ts",
"package": "npm run build:all && vsce package",
"deploy": "npm run package && vsce publish"
}
}

第六阶段：使用示例

示例1：基础使用

// 用户选择表达式 "2 * (3 + 4)^2"
// 触发命令后：
// 1. 发送到Java计算引擎
// 2. 返回结果 "98"
// 3. 可选择插入文档或显示通知

// 代码中直接调用
const result = await javaCalculator.evaluate("sin(PI/2)");
console.log(result); // 1

示例2：复杂计算

// 矩阵运算
const matrixA = [[1, 2], [3, 4]];
const matrixB = [[5, 6], [7, 8]];

const result = await javaCalculator.matrixMultiply(matrixA, matrixB);
// 返回: [[19, 22], [43, 50]]

示例3：统计计算

// 数据分析
const data = [1.2, 2.3, 3.4, 4.5, 5.6];
const stats = await javaCalculator.statisticalAnalysis(data);

// 包含: { mean: 3.4, median: 3.4, stdDev: 1.581, … }

七、关键注意事项

async function checkJavaEnvironment(): Promise<boolean> {
try {
const { exec } = require('child_process');
const { stdout } = await exec('java -version');
return stdout.includes('version');
} catch {
return false;
}
}

// 监控Java进程内存
setInterval(() => {
if (javaProcess) {
const memoryUsage = process.memoryUsage();
if (memoryUsage.heapUsed > 500 * 1024 * 1024) {
// 触发GC或重启进程
restartJavaProcess();
}
}
}, 30000);

// 自动重连机制
let retryCount = 0;
const maxRetries = 3;

async function executeWithRetry(operation: () => Promise<any>) {
while (retryCount < maxRetries) {
try {
return await operation();
} catch (error) {
retryCount++;
if (retryCount === maxRetries) throw error;
await new Promise(resolve => setTimeout(resolve, 1000 * retryCount));
}
}
}

八、性能优化建议

九、安全性考虑

总结

Java在VS Code中的集成比Delphi更加自然，主要优势在于：

实现的关键点：

• 选择合适的通信机制
• 设计良好的API接口
• 实现完善的错误处理
• 提供直观的用户界面
• 确保性能和稳定性

这种架构不仅适用于计算插件，也可作为其他Java功能集成到VS Code的参考模板。