Spring MVC 返回 JSON数据

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两种方式:

第一种:使用阿里的fastjson,对应的包。

首先,在pox.xml添加jar包

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.51</version>
</dependency>

其次,在spring-mvc.xml添加如下配置:

    <mvc:annotation-driven>
        <mvc:message-converters register-defaults="false">
            <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>

最后,就可以编写controller了

@Controller
public class JsonController {

    @ResponseBody
    @RequestMapping(value = "/getJson.do")
    public User getJson(int id,String name)  {
        User user = new User(id,name);
        return user;
    }
}

第二种:导入下面三个jar包

       <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.7</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.7</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.7</version>
        </dependency>

注意:无需任何配置,可以直接编写controller

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转载自blog.csdn.net/qq_42726314/article/details/84024870
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