spring MVC 4.3.1和jackson2.5.0总是出问题

[asa5880]

功能只想能输出json数据

工具： idea 2016.2.1 没有mevan构建，直接引用jar包， spring MVC 4.3.1和 jackson2.5 (jackson-annotations-2.5.0.jar 、jackson-core-2.5.0.jar、jackson-databind-2.5.0.jar)， 用的tomcat8.5
java文件：

@Controller
public class UserController {

    @RequestMapping(value="/user", method= RequestMethod.GET)
    public @ResponseBody User  hello() throws IOException {
        User user = new User();
        user.setName("test");
        user.setPassword("123");
        return user;
    }
}

spring配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">


    <context:annotation-config />
    <context:component-scan base-package="com.test" />


    <bean id = "User" class="com.test.User"></bean>


    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>

    <!-- ViewResolver -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

[爱睡觉的阿狸]

jackson降低版本试试，比如2.2.3

[asa5880]

现在连个demo都做不起来， java新人没办法

[袅袅青烟]

这样写代码吗