SpringMVC+Jquery实现Ajax功能（springmvc框架）干货分享

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<?xml version=”1.0″ encoding=”UTF-8″?>
<web-app xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”
xmlns=”http://xmlns.jcp.org/xml/ns/javaee”
xsi:schemaLocation=”http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd”
id=”WebApp_ID” version=”3.1″>
<!– 核心控制器 –>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<!– SpringMVC的配置文件的位置 –>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext-mvc.xml</param-value>
</init-param>
<!–即SpringMVC跟着服务器(tomcat)的启动而启动 –>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<!–使用杠（/）更加符合咱们的RESTful风格 –>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!– 配置相应的过滤器:角色SpringMVC 的POST请求的乱码问题 –>
<!– 配置编码方式过滤器,注意一点:要配置在所有过滤器的前面 –>
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>
//serialize():表单序列化
var params=$(“#loginForm”).serialize();
//post请求，params:请求参数，将数据传到后端，function(result){}:回调函数，接收后端返回的数据，参数名（result）可随便取
　　　　　$.post(“/Jquery/login”,params,function(result){
//因为SpringMVC框架和Jquery框架的联合作用，使得传回来的result保留了原有数据类型
if(result){//登录成功
window.location.href=”http://www.baidu.com” rel=”external nofollow” rel=”external nofollow” ;
}else{
//完全等于 document.getElementById(“erSpan”).innerHTML=result+”:”+”登录失败！”;
$(“#erSpan”).html(result+”:”+”登录失败！”);
}
})
}
function login2(){

//以下两句相当于 document.getElementById(“userName”).value;
var userName=$(“#userName”).val();
var pwd=$(“#pwd”).val();
//写法一：key值必须要加””;
//var params=
</script>
</head>
<body>
<span id=”erSpan”></span>
<form id=”loginForm” action=”/Jquery/login” method=”post”>
用户名：<input type=”text” name=”userName” id=”userName” /> <br />
密码<input type=”text” name=”pwd” id=”pwd” /><br />
<input type=”button” value=”ajax表单提交” onclick=”login()” />
<input type=”button” value=”ajax单独提交” onclick=”login2()” />
</form>
</body>
</html>