DWR类型转换学习笔记

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一、DWR调用参数类型和返回类型都是JavaBean的java方法

1.index.jsp

var u = {

username : "123",

password : "123"

};

user.checkLogin(u, function(data) {

alert("username="+data.username+";password="+data.password);

})

2.User.java

package bean;public class User {private String username;private String password;public User(){}public User(String username){this.username=username;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public User checkLogin(User user){ return user; }}

3.dwr.xml

</create>

<convert converter="bean" match="bean.User"><param name="include" value="username,password" /></convert>

二、DWR调用参数类型是String,返回类型是Object的java方法

1.jsp页面

helloDwr.getObject("zxc",function(data){

alert(data.name);

});

2.dwr.xml配置

</create>

</convert>

3.Cat.java

package bean;public class Cat { private String name; //构造器 public Cat(String name){ this.name=name; }}

4.HelloDwr的方法

//返回一个普通的Java对象，Cat对象为其属性没有提供setter和getter方法

public Cat getObject(String name){

return new Cat("name");

}

三、DWR调用参数类型是对象数组,返回类型是对象数组的java方法

1.jsp页面

var u=[{username:"Jim",password:"123"},{username:"cat",password:"123"},{username:"sunny",password:"123"}];

helloDwr.getPersonArray(u,function(data){

for(var i=0;i<data.length;i++){

alert(data[i].username);

}

});

2.dwr.xml不需要配置

3.HelloDwr的方法

//返回一个数组对象

public User[] getPersonArray(User[] u){

return u;

}

四、DWR调用参数类型是泛型Map,返回类型也是泛型Map的java方法

1.jsp

var u={a:{username:"Jim",password:"123"},b:{username:"cat",password:"123"},c:{username:"sunny",password:"123"}};

helloDwr.getPersonMap(u,function(data){

var result="";

for(var key in data){

result+="键为"+key+",其值为:"+data[key].username+"<br>";

}

alert(result);

});

2.dwr.xml不需要配置

3.HelloDwr的方法

//返回一个Map对象

public Map<String ,User>getPersonMap(Map<String,User> pmap){

return pmap;

}

五、DWR调用参数类型是无泛型list集合的java方法

1.jsp

var u=[{username:"Jim",password:"123"},{username:"cat",password:"123"},{username:"sunny",password:"123"}];

helloDwr.sendListNogeneric(u,function(data){

alert(data);

});

2.dwr.xml

<![CDATA[

import java.util.List;

import bean.HelloDwr;

import bean.User;

HelloDwr.sendListNogeneric (List<User>);

]]>

</signatures>

3.HelloDwr的方法

//远程方法的参数是集合

public String sendListNogeneric(List p1){

String result="";

for(Object p:p1){

result+=((User)p).getUsername()+"<br>";

}

return result;

}

六、DWR调用参数类型是泛型list集合，返回类型也是泛型list集合的java方法

1.jsp

var u=[{username:"Jim",password:"123"},{username:"cat",password:"123"},{username:"sunny",password:"123"}];

helloDwr.getUserList(u,function(data){

for(var i=0;i<data.length;i++){

alert(data[i].username);

}

});

2.dwr.xml无需配置

3.HelloDwr的方法

//返回一个集合对象

public List<User> getUserList(List<User> list){

return list;

}

七、完整的例子

1.index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="gbk"isELIgnored="false"%><%String path = request.getContextPath();%><html><head><mce:script type='text/javascript' src='<%=path%></mce:script><mce:script type='text/javascript' src='<%=path%></mce:script><mce:script type='text/javascript' src='<%=path%></mce:script><mce:script type='text/javascript' src='<%=path%></mce:script><mce:script type="text/javascript"></mce:script></head><body><form>用户名:<input type="text" name="username" id="username" /><br />密码:<input type="password" name="password" id="password" /><br /><input type="button" value="javabean转换" onclick="checkLogin()" /><input type="button" value="Object转换" onclick="f()"/><input type="button" value="数组转换" onclick="a()"/><input type="button" value="Map转换" onclick="b()"/><input type="button" value="无泛型list集合转换" onclick="c()"/><input type="button" value="泛型list集合转换" onclick="d()"/></form></body></html>

2.HelloDwr.java

package bean;import java.util.List;import java.util.Map;public class HelloDwr { //使用JavaBean作为和返回参数的方法public User sendObjec(User u){return u;}//返回一个普通的Java对象，Cat对象为其属性没有提供setter和getter方法public Cat getObject(String name){return new Cat("name");} //返回一个集合对象public List<User> getUserList(List<User> list){return list;}//返回一个数组对象public User[] getPersonArray(User[] u){return u;}//返回一个Map对象public Map<String ,User>getPersonMap(Map<String,User> pmap){return pmap;}//远程方法的参数是集合public String sendListNogeneric(List p1){String result="";for(Object p:p1){result+=((User)p).getUsername()+"<br>";}return result;}}

3.Cat.java

package bean;public class Cat { private String name; //构造器 public Cat(String name){ this.name=name; }}

4.dwr.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 1.0//EN" "http://www.getahead.ltd.uk/dwr/dwr10.dtd"><dwr><allow><create creator="new" javascript="user"><param name="class" value="bean.User" /><include method="checkLogin" /></create><create creator="new" javascript="helloDwr"> <param name="class" value="bean.HelloDwr"/></create><convert converter="bean" match="bean.User"><param name="include" value="username,password" /></convert><convert converter="object" match="bean.Cat"><param name="force" value="true" /></convert></allow><signatures></signatures></dwr>

5.web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><servlet><servlet-name>dwr-invoker</servlet-name><servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class><init-param><param-name>debug</param-name><param-value>true</param-value></init-param></servlet><servlet-mapping><servlet-name>dwr-invoker</servlet-name><url-pattern>/dwr/*</url-pattern></servlet-mapping><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

注：源码已经上传至CSDN,可访问http://download.csdn.net/source/3080258去下载