求解 java動態編譯找不到類，往各位大蝦指導

import java.io.IOException;

import java.lang.reflect.Method;

import java.net.URI;

import java.net.URISyntaxException;

import java.util.Arrays;

import javax.tools.JavaCompiler;

import javax.tools.JavaCompiler.CompilationTask;

import javax.tools.JavaFileObject;

import javax.tools.SimpleJavaFileObject;

import javax.tools.StandardJavaFileManager;

import javax.tools.ToolProvider;

/**

* 動態編譯Java 源文件

*

* @author shenshouer

*

*/

public class CompilerTest {

public static void main(String[] args) throws Exception {

String source = "public class Main { " + "public static void main(String[]args) {"

+ "System.out.println(\"Hello World!\");" + "} " + "}";

JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);

StringSourceJavaObject sourceObject = new CompilerTest.StringSourceJavaObject("Main",

source);

Iterable<? extends JavaFileObject> fileObjects = Arrays.asList(sourceObject);

// 獲取編譯類根路徑，不然會報找不到類的錯誤

String path = Class.class.getClass().getResource("/").getPath();

Iterable< String> options = Arrays.asList("-d", path);

// 增加options參數

// CompilationTask task = compiler.getTask(null, fileManager, null, null, null, fileObjects);

CompilationTask task = compiler.getTask(null, fileManager, null, options, null, fileObjects);

boolean result = task.call();

if (result) {

System.out.println("編譯成功。");

ClassLoader loader = CompilerTest.class.getClassLoader();

try {

Class<?> clazz = loader.loadClass("Main");

Method method = clazz.getMethod("main", String[].class);

// 修改調用參數，不然會報參數個數不對

// Object value = method.invoke(null, new Object[] {});

Object value = method.invoke(null, new Object[] {new String[]{}});

System.out.println(value);

} catch (Exception e) {

e.printStackTrace();

}

}

}

static class StringSourceJavaObject extends SimpleJavaFileObject {

private String content = null;

public StringSourceJavaObject(String name, String content) throws URISyntaxException {

super(URI.create("string:///" + name.replace('.', '/') + Kind.SOURCE.extension),

Kind.SOURCE);

this.content = content;

}

public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {

return content;

}

}

}