springmvc-json-乱码解决

1、java对象转json

@Controller
public class UserController {

//   
    // 多数通过配置xml文件实现乱码过滤，这种方式不推荐，写起来太冗余
    @RequestMapping(value = "/json1")
    @ResponseBody // 让返回字符串对象，不走视图解析器
    public String json1() throws JsonProcessingException {

        ObjectMapper mapper = new ObjectMapper();
        User1 user1 = new User1("tom",12,"男");
        // 将对象转换为字符串对象，如果出现500错误多数是 打包没打jackson的包
        String st = mapper.writeValueAsString(user1);
        // 打印转换过的json数据
        System.out.println(st);
        return st;
    }

}

2、spring解决中文乱码-方法1：

 @RequestMapping(value = "/json1",produces = "application/json;charset=utf-8")  解决乱码问题

3、mvc框架解决中文乱码-方法2：

修改springmvc-servlet.xml

<!--    json 编码过滤器-->
    <mvc:annotation-driven>
        <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>