反射机制构建web应用(Demo)

来源：互联网发布：雅黑php探针编辑：程序博客网时间：2024/04/30 10:20

构建处理事务的Servlet，并部署web.xml中，引用路径/handle

package com.reflect.handle;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HandlerServlet extends HttpServlet{
protected void service(HttpServletRequest request, HttpServletResponse response){
  try{
   request.setCharacterEncoding("GB2312");
   response.setContentType("text/html; charset=GB2312");
   PrintWriter out = response.getWriter();
   String className = request.getParameter("class").trim();
   String classMethod = request.getParameter("method").trim();
   String param = request.getParameter("param").trim();
   Class c = Class.forName(className);
   Object targetObj = c.newInstance();
   Class[] param1={String.class};
   Method setNameMethod = c.getMethod(classMethod, param1);
   Object[] argObj = {className};
   Object k = setNameMethod.invoke(targetObj, argObj);
   out.print(k);
  }
  catch(Exception ex){

out.print(ex.getMessage());
}
}
}

业务类1

package com.reflect;
public class Test1{
public String Test(String kk){
return "com.reflect.Test1:Test()"+kk;
}
}

业务类2
package com.reflect;

public class Test 2{
public String Test(String kk){
return "com.reflect.Test2:Test()"+kk;
}
}

访问：

http://localhost:8080/handle?class=com.reflect.Test1&&method=Test&&param=Qiu

http://localhost:8080/handle?class=com.reflect.Test2&&method=Test&&param=Qiu

原文出处:http://blog.csdn.net/qiulei563/archive/2009/03/22/4015143.aspx