json 数据传输实例

学号 姓名 年龄 性别 住址
1010 janne 20 man shanghai
1011 tom 22 women zhongguo
1055 jerry 18 man haerbiin
2033 sb 15 man beijing
1555 perry 60 man jinguo
2366 dff 34 woman Ameria
1066 Paris 28 woman Beijing
转换后的Json格式字符串:
{student:{record:[{学号:1010,姓名:janne,年龄:20,性别:ma,住址:shanghai},{学号:1011,姓名:tom,年龄:22,性别:wo,住址:zhongguo},{学号:1055,姓名:jerry,年龄:18,性别:ma,住址:haerbiin},{学号:1066,姓名:Paris,年龄:28,性别:wo,住址:Beijing},{学号:1555,姓名:perry,年龄:60,性别:ma,住址:jinguo},{学号:2033,姓名:sb,年龄:15,性别:ma,住址:beijing},{学号:2366,姓名:dff,年龄:34,性别:wo,住址:Ameria}]}}

package  com.json;
import  java.sql.*;
import  java.lang.reflect.*;
public  class  JsonConvert {
    //设置数据库连接属性
    Connection connection= null ;
    String driverName = "com.mysql.jdbc.Driver" ;
    String url =  "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=gb2312" ;
    String user =  "root" ;
    String password =  "000000" ;
    String table= "student" ;
    int  count;
    public  static  void  main(String[] args) {
        // TODO Auto-generated method stub
        JsonConvert jv= new  JsonConvert();
        //jv.getResult();
        System.out.println(jv.TableToJson());
    }
    public  String TableToJson(){ //把表记录转换成Json格式
        StringBuffer resultJson= new  StringBuffer();
        resultJson.append( "{" + this .table+ ":" );
        resultJson.append( "{record:[" );
        ResultSet rs= this .getResult();
        try {
            int  i= 0 ;
            while (rs.next()){
                resultJson.append( "{" );
                for ( int  j= 0 ;j
                    //System.out.println(rs.getMetaData().getColumnName(j+1));
                    String cn=rs.getString(j+ 1 );
                    resultJson.append(rs.getMetaData().getColumnName(j+ 1 )+ ":" +cn);
                    if (j 1 )
                        resultJson.append( "," );
                }
                if (i==(count- 1 ))
                    resultJson.append( "}" );
                else
                    resultJson.append( "}," );
                i++;
            }
            resultJson.append( "]}}" );
            connection.close();
        } catch (Exception se){
            se.printStackTrace();
        }
        return   resultJson.toString();
    }
    private  ResultSet getResult(){ //获取表记录
        ResultSet rs= null ;
        try {
            Class.forName(driverName);
            this .connection = DriverManager.getConnection(url,user,password);
            String statement= "select * from student " ;
            PreparedStatement ps= this .connection.prepareStatement(statement);
            rs=ps.executeQuery();
            ps= this .connection.prepareStatement( "select count(*) as cc from student" );
            ResultSet rs1=ps.executeQuery();
            rs1.next();
            count=rs1.getInt( "cc" );
        } catch (ClassNotFoundException noclass){
            noclass.printStackTrace();
        }
        catch (SQLException se){
            se.printStackTrace();
        }
        catch (Exception e){
            e.printStackTrace();
        }
        return  rs;
    }

}