SpringMVC(十三)：SpringMVC 与fastjson集成

1）fastjson jar包下载地址：https://sourceforge.net/projects/fastjson/
下载完成后需要把jar包拷贝到WEB-INF/lib文件夹中。
2）使用pom.xml配置：
如果你使用了Maven，maven repository配置如下：

<repository><id>opensesame</id><name>Alibaba OpenSource Repsoitory</name><url>http://code.alibabatech.com/mvn/releases/</url><snapshots><enabled>false</enabled></snapshots>
</repository>

pom.xml文件中加入依赖依赖：

<dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.1.34</version>
</dependency>

使用springmvc的情况下，需要在springmvc.xml中添加配置信息：

    <!-- 基于Annotation的映射方式 -->  <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="supportedMediaTypes">  <list>  <value>text/html;charset=UTF-8</value>  </list>  </property>  </bean> -->  <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">    <property name="supportedMediaTypes" value="text/html;charset=UTF-8"/>    <property name="features">    <array>    <value>WriteMapNullValue</value>    <value>WriteNullStringAsEmpty</value>    </array>    </property>    </bean>  </mvc:message-converters>  </mvc:annotation-driven>

测试类：

 1 public class User {
 2     private Long id;
 3     private String name;
 4
 5     public Long getId() { return id; }
 6     public void setId(Long id) { this.id = id; }
 7
 8     public String getName() { return name; }
 9     public void setName(String name) { this.name = name; }
10 }
11 public class Group {
12     private Long id;
13     private String name;
14     private List<User> users = new ArrayList<User>();
15
16     public Long getId() { return id; }
17     public void setId(Long id) { this.id = id; }
18
19     public String getName() { return name; }
20     public void setName(String name) { this.name = name; }
21
22     public List<User> getUsers() { return users; }
23     public void setUsers(List<User> users) { this.users = users; }
24 }
25
26 import com.alibaba.fastjson.JSON;
27
28 Group group = new Group();
29 group.setId(0L);
30 group.setName("admin");
31
32 User guestUser = new User();
33 guestUser.setId(2L);
34 guestUser.setName("guest");
35
36 User rootUser = new User();
37 rootUser.setId(3L);
38 rootUser.setName("root");
39
40 group.getUsers().add(guestUser);
41 group.getUsers().add(rootUser);
42
43 String jsonString = JSON.toJSONString(group);
44 System.out.println(jsonString);
45
46 Group group2 = JSON.parseObject(jsonString, Group.class);

SpringMVC中使用：

package com.dx.springlearn.hanlders;import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import com.alibaba.fastjson.JSON;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;import com.dx.springlearn.entities.Account;
import com.dx.springlearn.entities.WSUserInfo;@Controller
public class TestModelData {private final String SUCCESS = "success";@RequestMapping(name = "/postUser", method = RequestMethod.POST)public void postUser(String openid, String lng, String lat, HttpServletRequest request,HttpServletResponse response) {System.out.println("post user..." + openid + "," + lat + "," + lng);}@RequestMapping(name = "/getUserList", method = RequestMethod.GET)public void getUserList(String lng, String lat, HttpServletRequest request, HttpServletResponse response) {System.out.println("get user list...." + lat + "," + lng);List<WSUserInfo> userItems = new ArrayList<>();for (int i = 0; i < 10; i++) {userItems.add(new WSUserInfo("openid" + i, "120.082" + i, "30.238" + i));}try {//String jsonlist="[{\"openid\":\"openid0\",\"longitude\":\"120.0820\",\"latitude\":\"30.2380\"},{\"openid\":\"openid1\",\"longitude\":\"120.0821\",\"latitude\":\"30.2381\"}]";String jsonString = JSON.toJSONString(userItems);PrintWriter out = response.getWriter();out.print(jsonString);out.flush();out.close();} catch (IOException e) {// TODO Auto-generated catch block
            e.printStackTrace();}}
}package com.dx.springlearn.entities;public class WSUserInfo {private String openid;private String longitude;private String latitude;public WSUserInfo(String openid, String longitude, String latitude) {super();this.openid = openid;this.longitude = longitude;this.latitude = latitude;}public String getOpenid() {return openid;}public void setOpenid(String openid) {this.openid = openid;}public String getLongitude() {return longitude;}public void setLongitude(String longitude) {this.longitude = longitude;}public String getLatitude() {return latitude;}public void setLatitude(String latitude) {this.latitude = latitude;}
}

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