@ResponseBody把后台pojo转换成json对象
@RequestBody接收前台json数据,把json数据封装成对象
1、pom.xml添加依赖
<dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.9.5</version> </dependency>
2、配置
<!--配置适配器--> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"> <!--配置json转换器 告诉springmvc使用jackson转换--> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/> </list> </property> </bean>
3、在页面上用ajax往后台传值时把那些要传过去的属性封装,如下
var json = {name:"zhangsan",age:"30"}; var param = JSON.stringify(json);最后一行代码是将对象转成json字符的意思,前端将这个json字符提交到后台,后台直接用对象是接收不到这个的,你需要在后台代码中给方法参数前面加上 @RequestBody
@RequestMapping(value = "/addOrUpdatePolicyPublish", method = RequestMethod.POST) public Map<String, Object> addOrUpdatePolicyPublish(@RequestBody PolicyPublish policyPublish) {4、如果后台想要直接返回json字符的话,只需要在方法的返回类型前面加上@ResponseBody
示例:
@RequestMapping(value = "/addOrUpdatePolicyPublish", method = RequestMethod.POST) @ResponseBody public Map<String, Object> addOrUpdatePolicyPublish(@RequestBody PolicyPublish policyPublish) {
