第一步 导包
第二步配置 web.xml
添加如下
<!-- 配置dwr -->
<servlet>
<servlet-name>dwr</servlet-name>
<servlet-class>
org.directwebremoting.servlet.DwrServlet
</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>dwr</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
接下来配置dwr.xml
<?xml version="1.0" encoding="UTF-8"?>
<dwr xmlns="http://directwebremoting.org/schema/dwr20"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://directwebremoting.org/schema/dwr20
http://directwebremoting.org/schema/dwr20/dwr20.xsd ">
<allow>
<convert converter="bean" match="com.bean.User"></convert>
<create creator="new" javascript="TestDwrBizBeanImp" scope="application">
<param name="class" value= "com.biz.beanimp.TestDwrBizBeanImp" />
<include method="getUserlist"/>
<include method="getUserlistParmByList"/>
<include method="getUserlistReturnMap"/>
<include method="getUserlistReturnMapParmByMap"/>
</create>
</allow>
<signatures>
<![CDATA[
import java.util.List;
import java.util.Map;
import com.biz.beanimp.TestDwrBizBeanImp;
import com.bean.User;
TestDwrBizBeanImp.getUserlistParmByList(List<User>);
TestDwrBizBeanImp.getUserlistReturnMapParmByMap(Map<String,User>);
]]>
</signatures>
</dwr>
然后实现业务方法如下
package com.biz.beanimp;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import com.bean.User;
import com.biz.TestDwrBiz;
public class TestDwrBizBeanImp implements TestDwrBiz{
public List<User> getUserlist()
{
List<User> list = new ArrayList<User>();
User user = null;
user = new User();
user.setName("messi");
user.setPwd("123");
list.add(user);
user = new User();
user.setName("xiva");
user.setPwd("456");
list.add(user);
return list;
}
public List<User> getUserlistParmByList(List<User> inlist)
{
List<User> list = new ArrayList<User>();
User user = null;
user = new User();
user.setName("messi");
user.setPwd("123");
list.add(user);
user = new User();
user.setName("xiva");
user.setPwd("456");
list.add(user);
if (null != inlist && inlist.size() >= 1)
{
list.add(inlist.get(0));
}
return list;
}
public Map<String, User> getUserlistReturnMap()
{
Map<String, User> map = new java.util.Hashtable<String, User>();
User user = null;
user = new User();
user.setName("messi");
user.setPwd("123");
map.put("m", user);
user = new User();
user.setName("xiva");
user.setPwd("456");
map.put("x", user);
return map;
}
public Map<String, User> getUserlistReturnMapParmByMap(Map<String, User> inMap)
{
Map<String, User> map = new java.util.Hashtable<String, User>();
User user = null;
user = new User();
user.setName("messi");
user.setPwd("123");
map.put("m", user);
user = new User();
user.setName("xiva");
user.setPwd("456");
map.put("x", user);
if (null != inMap && null != inMap.get("u"))
{
map.put("u", inMap.get("u"));
}
return map;
}
}
接下来是调用页面
------jsp begin---
<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type='text/javascript' src='/MyCrmCopy/dwr/interface/TestDwrBizBeanImp.js'></script>
<script type='text/javascript' src='/MyCrmCopy/dwr/engine.js'></script>
<script type='text/javascript' src='/MyCrmCopy/dwr/util.js'></script>
<script type="text/javascript">
var callBackgetUserlist= function(data)//data是后台返回的值，名字自取，也可省略，因为JS允许
{
//如果callBack()没有写明返回值，可以通过argments[0]拿到
for(var i=0;i<data.length;i++)
/*对于java方法的返回值为List(Set)的情况，DWR将其转化为Object数组，传递个javascript*/
{
alert(data[i].name+":"+data[i].pwd);
}
alert("遍历方法2");
for(var property in data) //property为序号,从0开始
{
var bean = data[property];
alert(bean.name+":"+bean.pwd);
}
}
function getUserlist()
{
TestDwrBizBeanImp.getUserlist(callBackgetUserlist);//回调函数
}
function getUserlistParmByList()
{
var stu = [{id:0,name:"zhangsan",pwd:"zspassword"},{id:0,name:"zhangsan",pwd:"zspassword"}];
TestDwrBizBeanImp.getUserlistParmByList(stu,callBackgetUserlistParmByList);//回调函数callBack()
}
function callBackgetUserlistParmByList(data)//data是后台返回的值，名字自取，也可省略，因为JS允许
{
callBackgetUserlist(data);
//do something
}
function getUserlistReturnMap()
{
TestDwrBizBeanImp.getUserlistReturnMap(callBackgetgetUserlistReturnMap);//回调函数callBack()
}
function callBackgetgetUserlistReturnMap(data)//data是后台返回的值，名字自取，也可省略，因为JS允许
{
callBackgetUserlist(data);
//do something
}
function getUserlistReturnMapParmByMap()
{
var stu = { "u":{name:"zhangsan",pwd:"1sa",id:1}};
TestDwrBizBeanImp.getUserlistReturnMapParmByMap(stu,callBackgetgetUserlistReturnMapParmByMap);//回调函数callBack()
}
function callBackgetgetUserlistReturnMapParmByMap(data)//data是后台返回的值，名字自取，也可省略，因为JS允许
{
callBackgetUserlist(data);
//do something
}
</script>
</head>
<body>
getUserlist <input type="button" id="Submit" value="test" onclick="getUserlist()">
getUserlistParmByList <input type="button" id="Submit" value="test" onclick="getUserlistParmByList()">
getUserlistReturnMap <input type="button" id="Submit" value="test" onclick="getUserlistReturnMap()">
getUserlistReturnMapParmByMap <input type="button" id="Submit" value="test" onclick="getUserlistReturnMapParmByMap()">
</body>
</html>
-------jsp end ----
这就算完了