6. SpringMVC注解类实践例子2

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本系列入门学习参考极客学院Spring入门系列视频学习记录总结而来

返回JSON：
添加jsonjar

<dependency>        <groupId>org.codehaus.jackson</groupId>        <artifactId>jackson-core-asl</artifactId>        <version>1.9.12</version>    </dependency>    <dependency>        <groupId>org.codehaus.jackson</groupId>        <artifactId>jackson-mapper-lgpl</artifactId>        <version>1.9.12</version>    </dependency>

增加jsonController：

import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import com.dragon.springmvc.bean.User;@Controllerpublic class JsonController {    @ResponseBody    @RequestMapping("/getJson")    public User getUserInfo() {        User user = new User();        user.setPassword("1234");        user.setUsername("jsontest");        return user;    }}

springmvc配置模型解析器：

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:context="http://www.springframework.org/schema/context"    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util"    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">    <!-- 自动扫描 com.dragon 包下面的所有组件（使用了springmvc注解） -->    <context:component-scan base-package="com.dragon" />    <bean        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">        <property name="messageConverters">            <util:list id="beanList">                配置处理JSON数据                <ref bean="mappingJacksonHttpMessageConverter" />            </util:list>        </property>    </bean>    <bean id="mappingJacksonHttpMessageConverter"        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">        <property name="supportedMediaTypes">            <list>                <value>text/html;charset=UTF-8</value>            </list>        </property>    </bean></beans>

@PathVariable注解：

import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import com.dragon.springmvc.bean.User;@Controllerpublic class PathvariableController {    @ResponseBody    @RequestMapping("/pathvariable/{username}")    public User test1(@PathVariable String username){        User user = new User() ;        user.setUsername(username);        return user;    }    @ResponseBody    @RequestMapping("/pathvariable2/{intval}")    public User test1(@PathVariable Integer intval){        User user = new User() ;        user.setUsername(intval + "");        return user;    }}

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