springmvc中@ReuqestBody和@ResponseBody传输json数据

springmvc-4.2.4

pom.xml下要增加的依赖fasterxml的jar包：没有话会出现400错误

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.7.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.7.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.7.3</version>
</dependency>

加上spring-serlvet.xml中加上下面配置即可

<mvc:annotation-driven />

ajax请求代码片

<script type="text/javascript">
$(".btn").click(function() {
alert("点击按钮");
$.ajax({
type : "POST",
url : "catching",
//必须加否则报415错误
contentType : "application/json",
dataType : "json",
data : JSON.stringify({
"id" : 1,
"computerName" : "某某",
"publishDate" : "2010-10-20 00:00:00",
"position" : "java开发实习生"
}),
success : function(msg) {
alert(msg["id"]);//输出2
}
})
});
</script>

控制器代码

@RequestMapping(value = "/catching", method = RequestMethod.POST)
@ResponseBody
public Info catching(HttpSession session, @RequestBody Info info) {
info.setId("2");
info.setComputerName("某某xx");
return info;
}

这样返回给界面的数据会自动包装成json格式，如下：

{“id”:”2”,”computerName”:”某某xx”,”publishDate”:”2010-10-20 00:00:00”,”position”:”java开发实习生”}