Java动态编译[源码是字符串形式]

一、代码如下

import javax.tools.*; import java.io.IOException; import java.net.URI; import java.nio.charset.Charset; import java.util.ArrayList; import java.util.Arrays; import java.util.List; /** * @author * @version 1.0.0 * <p> * date: 2026/1/7 **/ public class Test1 { public static void main(String[] args) { JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>(); List<JavaFileObject> list = new ArrayList<>(); // 指定源代码 String code = "package org;" + "public class KK{" + " public void test(){" + " System.out.println(\"Hello World！\");" + " }" + "}"; // 添加一个源码对象 list.add(new Source("org.KK", code)); Boolean result = compiler.getTask(null, null, diagnostics, Arrays.asList("-d", "class/"), null, list).call(); System.out.println("结果：" + result); for (Diagnostic diagnostic :diagnostics.getDiagnostics()) System.out.format("出现错误，行号：[%d] 文件：%s%n", diagnostic.getLineNumber(), diagnostic.getSource().toString()); } } class Source extends SimpleJavaFileObject { /** * 源文件的代码 */ final String code; /** * 构造一个字符串源码对象 * @param name 类名，例如 org.Test * @param code 源代码字符串 */ Source(String name, String code) { super(URI.create("string:///" + name.replace('.','/') + Kind.SOURCE.extension), Kind.SOURCE); this.code = code; } @Override public CharSequence getCharContent(boolean ignoreEncodingErrors) { return code; } }

二、关键思路

1、重写SimpleJavaFileObject 类的"CharSequence getCharContent(boolean ignore)"方法。

2、在方法"CharSequence getCharContent(boolean ignore)"内部返回字符串源代码。