官方地址（需FQ）：http://flexjson.sourceforge.net/
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：http://download.csdn.net/detail/zzhd_xingfu/5885183
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 args
14 */
15 public static void main(String[] args) {
16 testJsonUtil();
17 }
18
19 public static void testJsonUtil() {
20 // Json String to Java object
21 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Object
27 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Object
34 UserModel um3 = new UserModel();
35 um3.setUserName("admin");
36 um3.setPassWord("123");
37 List<InterestModel> ims = new ArrayList<InterestModel>();
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 String
54 UserModel um4_1 = new UserModel();
55 um4_1.setUserName("admin_1");
56 um4_1.setPassWord("123_1");
57 List<InterestModel> ims4_1 = new ArrayList<InterestModel>();
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<InterestModel> ims4_2 = new ArrayList<InterestModel>();
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<Object> list = new ArrayList<Object>();
87 list.add(um4_1);
88 list.add(um4_2);
89 System.out.println(JsonUtil.getJsonStrFromList(list, "User", "ims", "tm"));
90 // ///
91
92 }
93 }
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 String
11 public static String getJsonStrFromObj(Object obj) {
12 JSONSerializer serializer = new JSONSerializer();
13 return serializer.serialize(obj);
14 }
15
16 // Java object to JSON String
17 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 String
24 public static String getJsonStrFromList(List<Object> objs, String rootName,
25 String... params) {
26 JSONSerializer serializer = new JSONSerializer();
27 serializer = serializer.include(params);
28 serializer.rootName(rootName);
29 return serializer.serialize(objs);
30 }
31
32 // Json String to Java object
33 public static <T> T getObjFromJsonStr(String source, Class<T> bean) {
34 return new JSONDeserializer<T>().deserialize(source, bean);
35 }
36
37
38 }
UserModel.java
1 /**
2 *
3 */
4 package com.flexjson.model;
5
6 import java.util.List;
7
8 /**
9 * @author Administrator
10 *
11 */
12 public class UserModel {
13 private String userName;// 用户名
14 private String passWord;// 密码
15 private List<InterestModel> 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<InterestModel> getIms() {
35 return ims;
36 }
37
38 public void setIms(List<InterestModel> 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 @Override
51 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 }