日期:2014-05-17 浏览次数:20597 次
package com.bjsxt.proxy;
import java.io.File;
import java.io.FileWriter;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import javax.tools.JavaCompiler;
import javax.tools.StandardJavaFileManager;
import javax.tools.ToolProvider;
import javax.tools.JavaCompiler.CompilationTask;
public class Proxy {
public static Object newProxyInstance(Class infce, InvocationHandler h) throws Exception { //JDK6 Complier API, CGLib, ASM
String methodStr = "";
String rt = "\r\n";
Method[] methods = infce.getMethods();
/*
for(Method m : methods) {
methodStr += "@Override" + rt +
"public void " + m.getName() + "() {" + rt +
" long start = System.currentTimeMillis();" + rt +
" System.out.println(\"starttime:\" + start);" + rt +
" t." + m.getName() + "();" + rt +
" long end = System.currentTimeMillis();" + rt +
" System.out.println(\"time:\" + (end-start));" + rt +
"}";
}
*/
for(Method m : methods) {
methodStr += "@Override" + rt +
"public void " + m.getName() + "() {" + rt +
" try {" + rt +
" Method md = " + infce.getName() + ".class.getMethod(\"" + m.getName() + "\");" + rt +
" h.invoke(this, md);" + rt +
" }catch(Exception e) {e.printStackTrace();}" + rt +
"}";
}
String src =
"package com.bjsxt.proxy;" + rt +
"import java.lang.reflect.Method;" + rt +
"public class $Proxy1 implements " + infce.getName() + "{" + rt +
" public $Proxy1(InvocationHandler h) {" + rt +
" this.h = h;" + rt +
" }" + rt +
" com.bjsxt.proxy.InvocationHandler h;" + rt +
methodStr +
"}";
String fileName =
"src/com/bjsxt/proxy/$Proxy1.java";
File f = new File(fileName);
FileWriter fw = new FileWriter(f);
fw.write(src);
fw.flush();
fw.close();
//compile
JavaCompiler compiler = ToolProvider.getSystem