dwr学习之提高篇

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在本人的这篇文章的基础上http://chenzheng8975.iteye.com/blog/1842080深入学习：

 

dwr工具类：
dwr转化对象和异常：
 
 
 
 

 

MyDwr.java:

package com.cz.model;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.directwebremoting.WebContext;
import org.directwebremoting.WebContextFactory;

public class MyDwr {
	public String hello(String world) {
		System.out.println("hello "+world);
		return "hello "+world;
	}
	
	public User load() {
		User u = new User(1,"张三",new Group(1,"财务处"));
		return u;
	}
	
	public List list() {
		List users = new ArrayList();
		users.add(new User(1,"张三",new Group(1,"财务处")));
		users.add(new User(2,"李四",new Group(2,"科技处")));
		users.add(new User(3,"王五",new Group(3,"宣传部")));
		return users;
	}
	
	public void add(User user) {
		System.out.println(user);
	}

	public void deleteUser() {
		throw new MyException("在删除用户的时候有错");
	}
	
	public int add(int a,int b) {
		return a+b;
	}
	
	public String upload(InputStream is,String filename) throws IOException {
		//WebContext可以获取HttpServlet的对象
		WebContext wc = WebContextFactory.get();
		HttpServletRequest req = wc.getHttpServletRequest();
		String realpath = req.getSession().getServletContext().getRealPath

("upload");
		String fn = FilenameUtils.getName(filename);
		String filepath = realpath+"/"+fn;
		FileUtils.copyInputStreamToFile(is, new File(filepath));
		return filepath;
	}
}

 

MyException.java:

package com.cz.model;

public class MyException extends RuntimeException {

	public MyException() {
		super();
		// TODO Auto-generated constructor stub
	}

	public MyException(String message, Throwable cause) {
		super(message, cause);
		// TODO Auto-generated constructor stub
	}

	public MyException(String message) {
		super(message);
		// TODO Auto-generated constructor stub
	}

	public MyException(Throwable cause) {
		super(cause);
		// TODO Auto-generated constructor stub
	}

}

 

***************************************************************
MyDwr.load(loadUser);
	function loadUser(user) {
		alert(user.id+","+user.username+","+user.group.name);
	}
*************************************************************
MyDwr.list(listUser);
	function listUser(users) {
		for(var i=0;i 
  
 
 
  
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>











	+
	

	
	
	
	
	
	

		

			

				
ID
				
username
				
groupName
			
		
		

		
	
	
	

 
  
 
 
  
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>