通过FastJson把字符串转换成JSON和Map和List对象处理json数据

1. packageivyy.taobao.com.domain.fastjson;
3. importivyy.taobao.com.entity.student;
4. importjava.util.ArrayList;
5. importjava.util.Arrays;
6. importjava.util.HashMap;
7. importjava.util.List;
8. importjava.util.Map;
9. importcom.alibaba.fastjson.JSON;
10. importcom.alibaba.fastjson.JSONObject;
11. importcom.alibaba.fastjson.TypeReference;
12. /**
13. *@DEMO:json
14. *@Java：FastJSON.java
15. *@Date:2015-1-19上午10:28:12
16. *@Author:龙叔
17. *@Email:jilongliang@sina.com
18. *@Weibo:http://weibo.com/jilongliang
19. *@Version:1.0
20. *@Description：fastjson跟json-lib是语法很像，一句话说，所有json都差不多，
21. *大家伙也没不要研究那么多，懂一种自己最擅长而且熟悉能解决自己要解决的问题就OK，
22. *从fastjson反编译过来看你就看到pom.xml里面的配置肯定能看到json-lib，此时能
23. *证明fastjson就是运用了json-lib！
24. *
25. *--------------------------------------------
26. *<dependency>
27. <groupId>org.codehaus.jackson</groupId>
28. <artifactId>jackson-smile</artifactId>
29. <version>1.9.9</version>
30. <scope>test</scope>
31. </dependency>
32. *--------------------------------------------
33. <dependency>
34. <groupId>com.googlecode.json-simple</groupId>
35. <artifactId>json-simple</artifactId>
36. <version>1.1</version>
37. <scope>test</scope>
38. </dependency>
39. --------------------------------------------
40. <groupId>net.sf.json-lib</groupId>
41. <artifactId>json-lib</artifactId>
42. <version>2.4</version>
43. <classifier>jdk15</classifier>
44. */
45. publicclassFastJSON{
47. /**
48. *@paramargs
49. */
50. staticvoid@H_55_141@main(String[]args)throwsException{
51. //String2Json();
52. //String2Object();
53. //String2List();
54. @H_132_4@map2json();
55. @H_132_4@map2JSON();
56. }
57. *通过fastjson把字符串转换成JSON数据
58. *TypeReference
59. voidString2Json(){
60. StringBufferbuffer=newStringBuffer();
61. buffer.append("{");
@H_267_502@"\"age\":").append("27").append(",");
62. "\"userName\":").append("\"龙叔\"").append(@H_616_355@);
@H_267_502@"\"address\":").append("\"广东省云浮市\"");
63. "}");
64. Stringjsontext=buffer.toString();
65. JSONObjectjobj=JSON.parSEObject(jsontext);
66. Stringaddress=jobj.get("address").toString();
67. System.out.println(address);
68. *通过fastjson把字符串转换成对象
69. voidString2Object(){
70. //方法一把json字符串转成student对象
71. studentstu1=JSON.parSEObject(jsontext,newTypeReference<student>(){});
72. //方法二把json字符串转成student对象
73. studentstu2=JSON.parSEObject(jsontext,student.class);
74. System.out.println(stu1.getAddress());
75. System.out.println(stu2.getAddress());
76. }
77. *通过fastjson把字符串转换成泛型数组
78. voidString2List(){
@H_267_502@"[{"); @H_267_502@"}]");
79. //转成成数组
80. student[]stu2=JSON.parSEObject(jsontext,255); BACkground-color:inherit">newTypeReference<student[]>(){});
81. List<student>list=Arrays.asList(stu2);
82. for(studentst:list){
83. System.out.println(st.getAddress());
84. //转换成ArrayList
85. ArrayList<student>list2=JSON.parSEObject(jsontext,255); BACkground-color:inherit">newTypeReference<ArrayList<student>>(){});
86. for(inti=0;i<list2.size();i++){
87. studentobj=(student)list2.get(i);
88. System.out.println(obj.getAddress());
89. *通过fastjson把Map换成字符串转
90. void@H_55_141@map2json(){
91. //创建@L_106_1@map对象
92. @H_132_4@map<String,String>map=newHashMap<String,String>();
93. @H_132_4@map.put("username","周伯通");
@H_267_502@"address",0); BACkground-color:inherit">"广东省仙游谷");
94. "age",0); BACkground-color:inherit">"198");
95. Stringjson=JSON.toJSONString(map,255); BACkground-color:inherit">true);//转成JSON数据
96. String>map1=(Map<String,String>)JSON.parse(json);
97. //遍历数组数据
98. for(Stringkey:map1.keySet()){
99. System.out.println(key+":"+map1.get(key));
100. *通过fastjson把Map换成字符串转
101. void@H_55_141@map2JSON(){
102. @H_132_4@mapmap=newHashMap();
103. Stringjson=JSON.toJSONString(map);
104. @H_132_4@mapmap1=JSON.parSEObject(json);
105. for(Objectobj:map.entrySet()){
106. @H_132_4@map.Entry<String,String>entry=(Map.Entry<String,String>)obj;
107. System.out.println(entry.getKey()+"--->"+entry.getValue());
108. }

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