适用场景：

Java应用满足用户自定义需求场景

实例代码：

测试用例(DynamicCompileTest)

package com.taobao.yugong.common;

import java.io.IOException;

import java.util.List;

import junit.framework.Assert;

import org.apache.commons.io.IOUtils;

import org.apache.commons.lang.StringUtils;

import org.apache.commons.lang.exception.ExceptionUtils;

import org.junit.Test;

import com.taobao.yugong.ITest;

import com.taobao.yugong.common.utils.compile.JdkCompiler;

public class DynamicCompileTest {

@Test

public void test() {

String javasource = null;

try {

List lines = IOUtils.readLines(Thread.currentThread()

.getContextClassLoader()

.getResourceAsStream("DynamicCompile.txt"));

javasource = StringUtils.join(lines, "\n");

} catch (IOException e) {

Assert.fail(ExceptionUtils.getFullStackTrace(e));

}

JdkCompiler compiler = new JdkCompiler();

Class> clazz = compiler.compile(javasource);

try {

System.out.println(((ITest) clazz.newInstance()).getPi());

} catch (InstantiationException e) {

Assert.fail(ExceptionUtils.getFullStackTrace(e));

} catch (IllegalAccessException e) {

Assert.fail(ExceptionUtils.getFullStackTrace(e));

}

}

}

源文件

package com.taobao.yugong;

public class DynamicCompile implements ITest {

@Override

public String getPi() {

return String.valueOf(Math.PI);

}

}

接口定义

package com.taobao.yugong;

public interface ITest {

public String getPi();

}

JdkCompiler文件定义，详见

https://github.com/alibaba/yugong