struts2+ajax+json 实例

最新推荐文章于 2021-08-06 11:07:00 发布

转载最新推荐文章于 2021-08-06 11:07:00 发布 · 662 阅读

本文详细介绍了如何在Struts2中集成JSON支持，包括引入必要的包、配置struts.xml文件、实现Java类以及JSP页面的使用。通过示例代码，展示了如何创建JSON响应并调用AJAX进行数据交互。

http://bo-hai.iteye.com/blog/1422612

1、struts2 要支持json，需要先引入包，包的下载地址如下：

http://code.google.com/p/jsonplugin/downloads/list

2、根据struts2的版本，选择jar包。

3、配置struts.xml文件：

Xml代码

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="TestJson" extends="json-default,struts-default" namespace="/bbs">
<action name="GoView" class="com.json.action.JsonAction" method="goView">
<result name="success">/GOView.jsp</result>
</action>
<action name="getUserName" class="com.json.action.JsonAction" method="getUserName">
<result type="json"/>
</action>
</package>
</struts>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
	<package name="TestJson" extends="json-default,struts-default" namespace="/bbs">
		<action name="GoView" class="com.json.action.JsonAction" method="goView">
			<result name="success">/GOView.jsp</result>
		</action>
		
		<action name="getUserName" class="com.json.action.JsonAction" method="getUserName">
			<result type="json"/>
		</action>
	</package>	
</struts>

4、JAVA类信息如下：

Java代码

public class JsonAction extends ActionSupport {
private static final long serialVersionUID = 105155412743741566L;
private User user;
public String goView() throws Exception {
return SUCCESS;
}
public String getUserName() throws Exception {
return SUCCESS;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}

public class JsonAction extends ActionSupport {

	private static final long serialVersionUID = 105155412743741566L;
	
	private User		user;
	
	public String goView() throws Exception {
		return SUCCESS;
	}

	public String getUserName() throws Exception {
		return SUCCESS;
	}
	
	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}
}

5、JSP页面如下：

Java代码

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<base href="<%=basePath%>">
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<title>JSON学习</title>
<script language="javascript" type="text/javascript" src="<%=basePath%>JQuery/jquery-1.6.js"></script>
<script type="text/javascript">
function testJSON() {
var username = "isoftstone";
$.ajax({
type:'post',
url:'bbs/getUserName.action',
dataType:'json',
data:{
"user.username":username
},
success:function(msg){
alert(msg.user.username);
}
});
}
</script>
</head>
<body>
<input type="button" value="测试JSON" onClick="JavaScript:testJSON()"/>
</body>
</html>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
	<head>
		<base href="<%=basePath%>">	
		<meta http-equiv="pragma" content="no-cache">
		<meta http-equiv="cache-control" content="no-cache">
		<meta http-equiv="expires" content="0">    		
		<title>JSON学习</title>
		<script language="javascript" type="text/javascript" src="<%=basePath%>JQuery/jquery-1.6.js"></script>
		<script type="text/javascript">
			function testJSON() {
				var username = "isoftstone";
				$.ajax({
					type:'post',
					url:'bbs/getUserName.action',
					dataType:'json',
					data:{
						"user.username":username
					},
					success:function(msg){
						alert(msg.user.username);
					}
				});
			}
		</script>
	</head>
	<body>
		<input type="button" value="测试JSON" onClick="JavaScript:testJSON()"/>
	</body>
</html>

6、运行程序及可。

7、注意事项：

（1）引入的包要正确；

（2） struts.xml的package定义要正确：

Xml代码

<package name="TestJson" extends="json-default,struts-default" namespace="/bbs">

<package name="TestJson" extends="json-default,struts-default" namespace="/bbs">

（3） JQuery 使用ajax 接受数据的格式是：JSON。