关于springmvc返回json格式数据

1.引入maven依赖

<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.3</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.3</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.3</version>
</dependency>

2.配置注解

<!-- 使用默认的注解映射 -->
<mvc:annotation-driven />

3.使用@ResponseBody

 @RequestMapping("/getJson")
    @ResponseBody
    public Object getJson(){
        User user = new User();
        user.setId("123");
        user.setName("里哈");
        return user;
    }