混合视图技术--ContentNegotiatingViewResolver

配置:

    <!-- 内容协商管理器  -->    <!--1、首先检查路径扩展名（如my.pdf）；2、其次检查Parameter（如my?format=pdf）；3、检查Accept Header-->    <bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">        <!-- 扩展名至mimeType的映射,即 /user.json => application/json -->        <property name="favorPathExtension" value="true"/>        <!-- 用于开启 /userinfo/123?format=json 的支持 -->        <property name="favorParameter" value="true"/>        <property name="parameterName" value="format"/>        <!-- 是否忽略Accept Header -->        <property name="ignoreAcceptHeader" value="false"/>    <!--扩展名到MIME的映射；favorPathExtension, favorParameter是true时起作用  --><property name="mediaTypes"> <value> json=application/json xml=application/xml html=text/html </value> </property><!-- 默认的content type --> <property name="defaultContentType" value="text/html"/> </bean> <!-- ========================= VIEW定义 ========================= --> <!-- 内容协商视图解析器；根据客户端的不同的请求决定不同的 view进行响应, 如 /blog/1.json /blog/1.xml --> <!-- 会自动根据解析的contentType来决定使用哪个视图解析器（默认使用整个web应用中的viewResolver） --> <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver" p:order="0"> <!-- 内容协商管理器 用于决定media type --> <property name="contentNegotiationManager" ref="contentNegotiationManager"/> <!-- 默认视图 放在解析链最后 --> <property name="defaultViews"><list> <!--<bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView"/>--> <bean class="com.alibaba.fastjson.support.spring.FastJsonJsonView" /><bean class="org.springframework.web.servlet.view.xml.MarshallingView" p:marshaller-ref="xmlMarshaller"> </bean> </list> </property> </bean> <bean id="xmlMarshaller" class="org.springframework.oxm.xstream.XStreamMarshaller"> <property name="streamDriver"> <bean class="com.thoughtworks.xstream.io.xml.StaxDriver"></bean> </property> <property name="autodetectAnnotations" ><value>true</value></property><property name="annotatedClasses"><list> <value>com.huihui.chy.demo1.model.UserModel</value> </list> </property> </bean> <!-- 默认的视图解析器 在上边的解析错误时使用 (默认使用html)- --> <bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:order="1"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> <property name="contentType" value="text/html"/> <property name="prefix" value="/WEB-INF/jsp/"/><property name="suffix" value=".jsp"/> </bean>

Controller

package com.huihui.chy.demo1.web;import java.util.ArrayList;import java.util.List;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.ModelAndView;import com.huihui.chy.demo1.model.UserModel;@Controller@RequestMapping("/user")public class ViewController {@RequestMapping("/findUsers")public ModelAndView findUsersForJson(){ModelAndView av = new ModelAndView();List<UserModel> users = this.initData();av.addObject("dataInfo", users);return av;}private List<UserModel> initData(){UserModel u1 = new UserModel(1001,"chyou1988","123");UserModel u2 = new UserModel(1002,"mahuihui","123");List<UserModel> users = new ArrayList<UserModel>();users.add(u1);users.add(u2);return users;}}

Model：

package com.huihui.chy.demo1.model;import javax.validation.constraints.NotNull;import org.hibernate.validator.constraints.NotEmpty;@XStreamAlias("user")public class UserModel {@XStreamAlias("id")private Integer id;@XStreamAlias("name")private String userName;@XStreamAlias("password")private String userPassword;public UserModel(){}public UserModel(Integer id,String userName,String userPassword){this.id = id;this.userName = userName;this.userPassword = userPassword;}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public String getUserPassword() {return userPassword;}public void setUserPassword(String userPassword) {this.userPassword = userPassword;}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}}

测试：

http://localhost:8080/chy-web/user/findUsers.xml

<list>

<user>

<id>1001</id>

<name>chyou1988</name>

<password>123</password>

</user>

<user>

<id>1002</id>

<name>mahuihui</name>

<password>123</password>

</user>

</list>

http://localhost:8080/chy-web/user/findUsers.json

{"dataInfo":[{"id":1001,"userName":"chyou1988","userPassword":"123"},{"id":1002,"userName":"mahuihui","userPassword":"123"}]}

注意：

controller中model中是个list列表，在转换为xml，根元素为<list>

解决办法：使用自定义对象包含集合，model存储自定义对象而避免存储list，使用见xstream