官方地址（需FQ）：

Flexjson 是一个将 Java 对象转成 JSON 的 类库，是一个深度转换的过程。

下面是我写的一个例子：

Main.java

1 package com.flexjson.main; 2  3 import java.util.ArrayList; 4 import java.util.List; 5  6 import com.flexjson.model.InterestModel; 7 import com.flexjson.model.TelModel; 8 import com.flexjson.model.UserModel; 9 10 public class Main {11 12     /**13      * @param args14      */15     public static void main(String[] args) {16         testJsonUtil();17     }18 19     public static void testJsonUtil() {20         // Json String to Java object21         String json1 = "{\"ims\":[{\"name\":\"篮球\"},{\"name\":\"足球\"}],\"tm\":{\"number\":\"15896352635\",\"type\":\"手机号\"},\"passWord\":\"123\",\"userName\":\"admin\"}";22         UserModel um1 = JsonUtil.getObjFromJsonStr(json1, UserModel.class);23         System.out.println(um1.toString());24         // ///25 26         // Java object to JSON String 简单的Object27         UserModel um2 = new UserModel();28         um2.setUserName("admin");29         um2.setPassWord("123");30         System.out.println(JsonUtil.getJsonStrFromObj(um2));31         // ///32 33         // Java object to JSON String 复杂的Object34         UserModel um3 = new UserModel();35         um3.setUserName("admin");36         um3.setPassWord("123");37         List
     
       ims = new ArrayList
      
       ();38         InterestModel im1 = new InterestModel();39         im1.setName("篮球");40         InterestModel im2 = new InterestModel();41         im2.setName("足球");42         ims.add(im1);43         ims.add(im2);44         um3.setIms(ims);45         TelModel tm = new TelModel();46         tm.setNumber("15896352635");47         tm.setType("手机号");48         um3.setTm(tm);49         String json3 = JsonUtil.getJsonStrFromObj(um3, "ims", "tm");50         System.out.println(json3);51         // ///52 53         // List to JSON String54         UserModel um4_1 = new UserModel();55         um4_1.setUserName("admin_1");56         um4_1.setPassWord("123_1");57         List
       
         ims4_1 = new ArrayList
        
         ();58         InterestModel im4_1_1 = new InterestModel();59         im4_1_1.setName("篮球_1");60         InterestModel im4_1_2 = new InterestModel();61         im4_1_2.setName("足球_1");62         ims4_1.add(im4_1_1);63         ims4_1.add(im4_1_2);64         um4_1.setIms(ims4_1);65         TelModel tm4_1 = new TelModel();66         tm4_1.setNumber("15896352635_1");67         tm4_1.setType("手机号_1");68         um4_1.setTm(tm4_1);69 70         UserModel um4_2 = new UserModel();71         um4_2.setUserName("admin_2");72         um4_2.setPassWord("123_2");73         List
         
           ims4_2 = new ArrayList
          
           ();74 InterestModel im4_2_1 = new InterestModel();75 im4_2_1.setName("篮球_2");76 InterestModel im4_2_2 = new InterestModel();77 im4_2_2.setName("足球_2");78 ims4_2.add(im4_2_1);79 ims4_2.add(im4_2_2);80 um4_2.setIms(ims4_2);81 TelModel tm4_2 = new TelModel();82 tm4_2.setNumber("15896352635_2");83 tm4_2.setType("手机号_2");84 um4_2.setTm(tm4_2);85 86 List
           
          
         
        
       
      
     

JsonUtil.java

1 package com.flexjson.main; 2  3 import java.util.List; 4  5 import flexjson.JSONDeserializer; 6 import flexjson.JSONSerializer; 7  8 public class JsonUtil { 9 10     // Java object to JSON String11     public static String getJsonStrFromObj(Object obj) {12         JSONSerializer serializer = new JSONSerializer();13         return serializer.serialize(obj);14     }15 16     // Java object to JSON String17     public static String getJsonStrFromObj(Object obj, String... params) {18         JSONSerializer serializer = new JSONSerializer();19         serializer = serializer.include(params);20         return serializer.serialize(obj);21     }22 23     // List to JSON String24     public static String getJsonStrFromList(List

UserModel.java

1 /** 2  *  3  */ 4 package com.flexjson.model; 5  6 import java.util.List; 7  8 /** 9  * @author Administrator10  * 11  */12 public class UserModel {13     private String userName;// 用户名14     private String passWord;// 密码15     private List
     
       ims;16     private TelModel tm;17     18     public String getUserName() {19         return userName;20     }21 22     public void setUserName(String userName) {23         this.userName = userName;24     }25 26     public String getPassWord() {27         return passWord;28     }29 30     public void setPassWord(String passWord) {31         this.passWord = passWord;32     }33     34     public List
      
        getIms() {35         return ims;36     }37 38     public void setIms(List
       
         ims) {39         this.ims = ims;40     }41 42     public TelModel getTm() {43         return tm;44     }45 46     public void setTm(TelModel tm) {47         this.tm = tm;48     }49 50     @Override51     public String toString() {52         return "userName=" + userName + "; passWord=" + passWord + ";";53     }54 55 }
       
      
     

TelModel.java

1 package com.flexjson.model; 2  3 public class TelModel { 4     private String number; 5     private String type; 6  7     public String getType() { 8         return type; 9     }10 11     public void setType(String type) {12         this.type = type;13     }14 15     public String getNumber() {16         return number;17     }18 19     public void setNumber(String number) {20         this.number = number;21     }22 23 }

InterestModel.java

1 package com.flexjson.model; 2  3 public class InterestModel { 4     private String name; 5  6     public String getName() { 7         return name; 8     } 9 10     public void setName(String name) {11         this.name = name;12     }13 }