1 import java.sql.*;
 2 import java.util.*;
 3 import org.json.*;//引入相关包，包含在json.jar里
 4 
 5 public class SqlJsonConvertor {
 6 public static void main(String[] args) {
 7     String driver = "com.mysql.jdbc.Driver";
 8     String url = "jdbc:mysql://localhost:3306/phpwind";
 9     String user = "root";
10     String passwd = "123456";
11     String sql = "select * from pw_acloud_apis";
12     
13     try {
14         Class.forName(driver);
15         Connection con = DriverManager.getConnection(url, user, passwd);
16         Statement st =  con.createStatement();
17         ResultSet rs = st.executeQuery(sql);
18         ResultSetMetaData rsmd = rs.getMetaData();
19         int colnum = rsmd.getColumnCount();
20         String val = "";
21         String colName = "";
22         JSONObject jobj = new JSONObject();
23         JSONArray jArr = new JSONArray();
24         
25         while(rs.next()) {
26             for(int i = 1; i<= colnum; i++) {
27                 colName = rsmd.getColumnLabel(i);
28                 if(1==i) {
29                     val = new Integer(rs.getInt(colName)).toString();
30                 }else {
31                     val = rs.getString(colName);
32                 }
33                 
34                 try {
35                     jobj.put(colName, val);
36                     
37                 } catch (JSONException e) {
38                     // TODO Auto-generated catch block
39                     e.printStackTrace();
40                 }            
41             }
42             jArr.put(jobj);    
43         }
44         System.out.println("Here is the json String:");
45         System.out.println(jArr.toString());
46         
47     }catch(ClassNotFoundException e) {
48         System.out.println("Driver not found");
49         e.printStackTrace();
50     }catch(SQLException e) {
51         e.printStackTrace();
52     }    
53 }
54 }