spring入门(四) spring mvc返回json结果

前提:已搭建好环境

1.建立Controller

 package com.ice.controller;

 import com.ice.model.Person;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;

 @RequestMapping("/person")
 @Controller
 public class PersonController {
     @RequestMapping("/get")
     @ResponseBody
     public Person get(){
         Person person=new Person();
         person.setAge(18);
         person.setName("ice");
         return person;
     }
 }

访问后报错,如下

Type Exception Report
Message No converter found for return value of type: class com.ice.model.Person
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
    org.springframework.http.converter.HttpMessageNotWritableException: No converter found for return value of type: class com.ice.model.Person

    org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:226)

2.解决方法

引入依赖

        <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>

修改spring-configure.xml

 <mvc:annotation-driven>
         <mvc:message-converters>
             <!--返回普通字符串-->
             <bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
             <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                 <property name="supportedMediaTypes">
                     <list>
                         <value>text/html;charset=UTF-8</value>
                         <value>application/json;charset=UTF-8</value>
                     </list>
                 </property>
             </bean>
         </mvc:message-converters>
     </mvc:annotation-driven>

3.重新运行ok

{"age":18,"name":"ice"}