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1 public class Book {
2 private String name;
3 private double price;
4
5 public String getName() {
6 return name;
7 }
8
9 public void setName(String name) {
10 this.name = name;
11 }
12
13 public double getPrice() {
14 return price;
15 }
16
17 public void setPrice(double price) {
18 this.price = price;
19 }
20
21 @Override
22 public String toString() {
23 return name+" "+price;
24 }
25 }
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1 /**
2 * @author ZWQ
3 * **/
4 public class JsonTest {
5 public static void main(String[] args) {
6 //***********************************************************************
7 // json基本测试
8 {
9 //新建一个JSON数组
10 JSONArray jsonArray = new JSONArray();
11 //新建一个JSON对象
12 JSONObject json1 = new JSONObject();
13 json1.put("id", "1");
14 json1.put("name", "张三");
15 json1.put("password", "123456");
16 //将JSON对象添加到JSON数组中去
17 jsonArray.add(json1);
18
19 JSONObject json2 = new JSONObject();
20 json2.put("id", "2");
21 json2.put("name", "李四");
22 json2.put("password", "654321");
23 jsonArray.add(json2);
24 System.out.println("json数组基本测试:" + jsonArray);
25
26 //结果：
27 //[{"id":"1","name":"张三","password":"123456"},{"id":"2","name":"李四","password":"654321"}]
28 }
29
30 //***********************************************************************
31 //将对象转成JSON字符串
32 {
33 Book book = new Book();
34 book.setName("Java入门教程");
35 book.setPrice(52.3);
36 //将Java对象转成JSON对象
37 JSONObject jsonObject = JSONObject.fromObject(book);
38 System.out.println("从Object到JSONObject:" + jsonObject.toString());
39
40 //结果：
41 //从Object到JSONObject:{"name":"Java入门教程","price":52.3}
42 }
43
44 //***********************************************************************
45 //将对象集合转成JSON字符串
46 {
47 List<Book> list = new ArrayList<Book>();
48 Book book1 = new Book();
49 book1.setName("高等数学I");
50 book1.setPrice(34.1);
51 Book book2 = new Book();
52 book2.setName("线性代数");
53 book2.setPrice(12.7);
54 list.add(book1);
55 list.add(book2);
56 //将List集合转为JSON数组
57 JSONArray jsonArray= JSONArray.fromObject(list);
58 System.out.println("从Object集合到JSONArray:" + jsonArray.toString());
59
60 //结果：
61 //从Object集合到JSONArray:[{"name":"高等数学I","price":34.1},{"name":"线性代数","price":12.7}]
62 }
63
64 //***********************************************************************
65 // 将JSON字符串转为Java对象
66 {
67 String jsonString = "{name:‘数据结构‘,price:52.3}";
68 JSONObject jsonObject = JSONObject.fromObject(jsonString);
69 //将JSON对象转为Java对象
70 Book book = (Book) JSONObject.toBean(jsonObject, Book.class);
71 System.out.println(book.toString());
72
73 //结果：
74 //数据结构 52.3
75 }
76
77 //***********************************************************************
78 //将JSON字符串转为Java对象数组
79 {
80 // (2).Bean的数组
81 String jsonsString = "[{name:‘数据库基础‘,price:52.3},{name:‘Oracle 11g精华‘,price:42.3}]";
82 JSONArray jsonArray = JSONArray.fromObject(jsonsString);
83 //将JSON数组转为Java对象数组
84 Book[] books = (Book[]) JSONArray.toArray(jsonArray, Book.class);
85 for (Book b : books) {
86 System.out.println(b.toString());
87 }
88
89 //结果：
90 //数据库基础 52.3
91 //Oracle 11g精华 42.3
92 }
93 }
94 }
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1 //Jquery提供的获取json的方法
2 //使用前先导入Jquery
3
4 $(‘#button‘).click(function(){
5 //url:请求的地址
6 $.getJSON(‘url‘, {
7 //id是需要传的参数
8 id: 1
9 }, function(data) {//成功后data即为获取的json字符串
10 //例如data：[{"name":"高等数学I","price":34.1},{"name":"线性代数","price":12.7}]
11 alert("第二本书是："+data[1].name+" 价格是："+data[1].price);
12 });
13 });
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原文地址：http://www.cnblogs.com/wanghuaijun/p/5433675.html
