Java 使用 Dbutils 工具类库 操作mysql

Dbutils 官网http://commons.apache.org/proper/commons-dbutils/

结合我个人写的JDBCUtils 写的 Dbutils 的使用demo . JDBCUtils 传送门:http://www.cnblogs.com/wwcherish/p/8037395.html

 package JDBCDemo;

 import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 import javax.xml.bind.annotation.W3CDomHandler;

 import org.apache.commons.dbutils.DbUtils;
 import org.apache.commons.dbutils.QueryRunner;
 import org.apache.commons.dbutils.handlers.ArrayHandler;
 import org.apache.commons.dbutils.handlers.ArrayListHandler;
 import org.apache.commons.dbutils.handlers.BeanHandler;
 import org.apache.commons.dbutils.handlers.BeanListHandler;
 import org.apache.commons.dbutils.handlers.ColumnListHandler;
 import org.apache.commons.dbutils.handlers.MapHandler;
 import org.apache.commons.dbutils.handlers.MapListHandler;
 import org.apache.commons.dbutils.handlers.ScalarHandler;

 import com.mysql.jdbc.Connection;

 public class dbutilsdemo1 {
     private static Connection connection  = JDBCUtils.getConnection();
     private static QueryRunner qRunner = new QueryRunner();
     public static void main(String[] args) {
         try {
             //insert();
             //delete();
             //ArraryHandlerdemo();
 //            beanListHandlerDemo();
             //ColumnListHandlerDemo();
             //mapHandlerDemo();
             mapListHandlerDemo();
         } catch (Exception e) {
             // TODO: handle exception
             System.out.println(e);
         }

     }
     public static void insert() throws SQLException {
         //insert  delete update
         String sql = "insert into zhangwu (name,money) values (?,?);";
         Object[] object = {"打麻将支出",100};
         int row = qRunner.update(connection,sql,object);
         DbUtils.closeQuietly(connection);
         if (row>0) {
             System.out.println("插入数据成功");
         }else {
             System.out.println("插入数据失败");
         }

     }

     public static void update() throws SQLException {
         String sql = "update zhangwu set money=? where id=?;";
         Object[] object = {500,4};
         int row = qRunner.update(connection,sql,object);
         DbUtils.closeQuietly(connection);
         if (row>0) {
             System.out.println("修改数据成功");
         }else {
             System.out.println("修改数据失败");
         }
     }

     public static void delete() throws SQLException {
         String sql = "delete from  zhangwu  where id=?;";
         Object[] object = {100};
         int row = qRunner.update(connection,sql,object);
         DbUtils.closeQuietly(connection);
         if (row>0) {
             System.out.println("删除数据成功");
         }else {
             System.out.println("删除数据失败");
         }
     }

     public static void ArraryHandlerdemo () throws SQLException {
         //返回1条数据集
         //ArraryHandler
         String sql = "select * from  zhangwu;";
         Object[] res = qRunner.query(connection, sql, new ArrayHandler());
         for(Object object : res) {
             System.out.print(object+"\t");
         }

     }
     public static void ArraryListHandlerDemo() throws SQLException {
         //返回整个数据集
         String sql = "select * from  zhangwu;";
         List<Object[]>  res = qRunner.query(connection, sql, new ArrayListHandler());
         for(Object[] objs : res) {
             for(Object oo : objs) {
                 System.out .print(oo  + "\t");
             }
             System.out.println("");
         }
     }
     public static void beanHandler() throws SQLException {
         //返回1条数据集
         String sql = "select * from  zhangwu;";
         Zhangwu zw = qRunner.query(connection,sql,new BeanHandler<Zhangwu>(Zhangwu.class));
         System.out.println(zw);
     }
     public static void beanListHandlerDemo() throws SQLException{
         //返回整个数据集
         String sql = "select * from  zhangwu;";
         List<Zhangwu> zwlist= qRunner.query(connection, sql, new BeanListHandler<Zhangwu>(Zhangwu.class));
         for(Zhangwu zwchild : zwlist) {
             System.out.println(zwchild.toString());
         }
     }
     public static void ColumnListHandlerDemo()  throws SQLException {
         //单列结果查询
         String sql = "select distinct name from  zhangwu";
         List<Object> zwlist= qRunner.query(connection, sql, new ColumnListHandler<Object>("name"));
         for(Object zwchild : zwlist) {
             System.out.println(zwchild.toString());
         }
     }
     public static void scalarHandlerDemo() throws SQLException {
         //单结果集查询
         String sql = "select count(*) from  zhangwu;";
         Long num =  qRunner.query(connection, sql, new ScalarHandler<Long>());
         System.out.println(num);
     }
     public static void mapHandlerDemo() throws SQLException {
         //结果集第一行数据 封装到map集合中
         String sql = "select * from  zhangwu;";
         Map< String,Object >  map= qRunner.query(connection,sql,new MapHandler());
         for(String key : map.keySet()) {
             System.out.println(key + "..." + map.get(key));
         }
     }
     public static void mapListHandlerDemo() throws SQLException {
         // 封装到map集合中 适合少量数据
         String sql = "select * from  zhangwu;";
         List<Map<String, Object>>  listmap = qRunner.query(connection, sql, new MapListHandler());
         for(Map<String, Object> mapchild : listmap) {
             for(String key : mapchild.keySet()) {
                 System.out.print(key + " = " + mapchild.get(key) + "  ");
             }
             System.out.println("");
         }
     }
 }