1.可以使用servletAPI来实现 ajax
Controller 类
@Controller
public class AjaxController {
@RequestMapping("/ajax.do")
public String ajax(HttpServletResponse resp) throws IOException{
resp.getWriter().print("ajax hello");
return null;
}
}
Jsp
<script type="text/javascript" src="js/jquery-1.11.3.min.js"></script>
<script type="text/javascript">
$(function(){
$('#btn').click(function(){
$.post("ajax.do",function(data){
alert(data);
});
});
});
</script>
</head>
<body>
<button id="btn">异步获取数据信息</button>
</body>
2. 使用 springmvc 提供的组件来实现 ajax
导入 jackson 的相关包：
Controller 处理
@RequestMapping("/json.do")
@ResponseBody//将返回内容插入页面中
public List<User> list(){
List<User> list = new ArrayList<User>();
list.add(new User(1,"张三",22));
list.add(new User(2,"李四",32));
return list;
}配置文件
<!-- json配置 -->
<bean id="stringConverter"
class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/plain;charset=UTF-8</value>
</list>
</property>
</bean>
<bean id="jsonConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="stringConverter" />
<ref bean="jsonConverter" />
</list>
</property>
</bean>
Jsp 页面
<script type="text/javascript" src="js/jquery-1.11.3.min.js"></script>
<script type="text/javascript">
$(function(){
$('#btn').click(function(){
$.post("json.do",function(data){
var html="";
for(var i=0;i<data.length;i++){
html+="<tr><td>"+data[i].id+"</td><td>"+data[i].name+"</td><td>"+data[i].age+"</td></tr>"
}
$("#content").html(html);
});
});
});
</script>
</head>
<body>
<button id="btn">异步获取数据信息</button>
<table width="80%" align="center">
<tr>
<td>编号</td>
<td>姓名</td>
<td>年龄</td>
</tr>
<tbody id="content"></tbody>
</table>
</body>
</html>
配置优化
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 配置视图解析器 -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<!-- 为响应的视图名称加上前缀 -->
<property name="prefix" value="/WEB-INF/jsp/"/>
<!-- 为响应的视图名称加上后缀 -->
<property name="suffix" value=".jsp"/>
</bean>
<mvc:annotation-driven/>
<context:component-scan base-package="cn.sxt.controller"/>
</beans>