package com.java.basic.compiler;
import javax.tools.JavaCompiler;
import javax.tools.ToolProvider;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
public class CompilerTest {
public static void main(String[] args) throws IOException {
/**
* 1. 编译代码
* 2. 执行代码
* 3. 线程交互, 获取输入流(执行结果)
*/
// 代码编译
JavaCompiler javaCompiler = ToolProvider.getSystemJavaCompiler();
int count = javaCompiler.run(null, null, null,
"D:/new~dir/project-student/CompilerSource.java");
System.out.println(count == 0 ? "编译成功": "编译失败");
// 代码执行
Runtime runtime = Runtime.getRuntime();
Process process = runtime.exec("java -cp D:/new~dir/project-student/ CompilerSource");
InputStream in = process.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String inS = "";
while ((inS=reader.readLine()) != null) {
System.out.println(inS);
}
}
}
package com.java.basic.compiler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
public class ReflectTest {
public static void main(String[] args) throws MalformedURLException, ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
/**
* 1. 加载类进jvm, 获取字节码对象
* 2. 使用反射调用该方法
*/
URL[] urls = new URL[]{new URL("file:/D:/new~dir/project-student/")};
URLClassLoader loader = new URLClassLoader(urls);
Class c = loader.loadClass("CompilerSource");
Method m = c.getMethod("main", String[].class);
m.invoke(null,(Object)new String[]{"a","b"});
}
}