相关代码：
前提是你的springmvc其他配置已经ok的情况下
1.导入JSON相关依赖
<!--阿里的json包--><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.78</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.8</version></dependency>
2.编写一个实体类
@Data@AllArgsConstructor@NoArgsConstructorpublic class User {private int id;private String name;private String address;}
3.在springmvc-servlet.xml中加入此配置
为了处理JSON格式的中文乱码
<mvc:annotation-driven><!--JSON格式乱码处理方式--><mvc:message-converters register-defaults="true"><bean class="org.springframework.http.converter.StringHttpMessageConverter"><constructor-arg value="UTF-8"/></bean><bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"><property name="objectMapper"><bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean"><property name="failOnEmptyBeans" value="false"/></bean></property></bean></mvc:message-converters></mvc:annotation-driven>
4.编写Controller
@Controllerpublic class JsonController {@GetMapping("/json")@ResponseBodypublic String json(){User user = new User(1,"齐菁菁","china");User user1 = new User(2,"詹三","china");User user2 = new User(3,"李四","china");List<User> list = Arrays.asList(user, user1, user2);return JSON.toJSONString(list);}}
5.启动tomcat进行访问
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