Java 使用 Dbutils 工具类库 操作mysql
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了Java 使用 Dbutils 工具类库 操作mysql,小编现在分享给大家,供广大互联网技能从业者学习和参考。文章包含6124字,纯文字阅读大概需要9分钟。
内容图文
package JDBCDemo; 2 3 import java.sql.SQLException; 4 import java.util.ArrayList; 5 import java.util.HashMap; 6 import java.util.List; 7 import java.util.Map; 8 9 import javax.xml.bind.annotation.W3CDomHandler; 10 11 import org.apache.commons.dbutils.DbUtils; 12 import org.apache.commons.dbutils.QueryRunner; 13 import org.apache.commons.dbutils.handlers.ArrayHandler; 14 import org.apache.commons.dbutils.handlers.ArrayListHandler; 15 import org.apache.commons.dbutils.handlers.BeanHandler; 16 import org.apache.commons.dbutils.handlers.BeanListHandler; 17 import org.apache.commons.dbutils.handlers.ColumnListHandler; 18 import org.apache.commons.dbutils.handlers.MapHandler; 19 import org.apache.commons.dbutils.handlers.MapListHandler; 20 import org.apache.commons.dbutils.handlers.ScalarHandler; 21 22 import com.mysql.jdbc.Connection; 23 24 public class dbutilsdemo1 { 25 private static Connection connection = JDBCUtils.getConnection(); 26 private static QueryRunner qRunner = new QueryRunner(); 27 public static void main(String[] args) { 28 try { 29 //insert(); 30 //delete(); 31 //ArraryHandlerdemo(); 32 // beanListHandlerDemo(); 33 //ColumnListHandlerDemo(); 34 //mapHandlerDemo(); 35 mapListHandlerDemo(); 36 } catch (Exception e) { 37 // TODO: handle exception 38 System.out.println(e); 39 } 40 41 } 42 public static void insert() throws SQLException { 43 //insert delete update 44 String sql = "insert into zhangwu (name,money) values (?,?);"; 45 Object[] object = {"打麻将支出",100}; 46 int row = qRunner.update(connection,sql,object); 47 DbUtils.closeQuietly(connection); 48 if (row>0) { 49 System.out.println("插入数据成功"); 50 }else { 51 System.out.println("插入数据失败"); 52 } 53 54 } 55 56 public static void update() throws SQLException { 57 String sql = "update zhangwu set money=? where id=?;"; 58 Object[] object = {500,4}; 59 int row = qRunner.update(connection,sql,object); 60 DbUtils.closeQuietly(connection); 61 if (row>0) { 62 System.out.println("修改数据成功"); 63 }else { 64 System.out.println("修改数据失败"); 65 } 66 } 67 68 public static void delete() throws SQLException { 69 String sql = "delete from zhangwu where id=?;"; 70 Object[] object = {100}; 71 int row = qRunner.update(connection,sql,object); 72 DbUtils.closeQuietly(connection); 73 if (row>0) { 74 System.out.println("删除数据成功"); 75 }else { 76 System.out.println("删除数据失败"); 77 } 78 } 79 80 public static void ArraryHandlerdemo () throws SQLException { 81 //返回1条数据集 82 //ArraryHandler 83 String sql = "select * from zhangwu;"; 84 Object[] res = qRunner.query(connection, sql, new ArrayHandler()); 85 for(Object object : res) { 86 System.out.print(object+"\t"); 87 } 88 89 } 90 public static void ArraryListHandlerDemo() throws SQLException { 91 //返回整个数据集 92 String sql = "select * from zhangwu;"; 93 List<Object[]> res = qRunner.query(connection, sql, new ArrayListHandler()); 94 for(Object[] objs : res) { 95 for(Object oo : objs) { 96 System.out .print(oo + "\t"); 97 } 98 System.out.println(""); 99 } 100 } 101 public static void beanHandler() throws SQLException { 102 //返回1条数据集 103 String sql = "select * from zhangwu;"; 104 Zhangwu zw = qRunner.query(connection,sql,new BeanHandler<Zhangwu>(Zhangwu.class)); 105 System.out.println(zw); 106 } 107 public static void beanListHandlerDemo() throws SQLException{ 108 //返回整个数据集 109 String sql = "select * from zhangwu;"; 110 List<Zhangwu> zwlist= qRunner.query(connection, sql, new BeanListHandler<Zhangwu>(Zhangwu.class)); 111 for(Zhangwu zwchild : zwlist) { 112 System.out.println(zwchild.toString()); 113 } 114 } 115 public static void ColumnListHandlerDemo() throws SQLException { 116 //单列结果查询 117 String sql = "select distinct name from zhangwu"; 118 List<Object> zwlist= qRunner.query(connection, sql, new ColumnListHandler<Object>("name")); 119 for(Object zwchild : zwlist) { 120 System.out.println(zwchild.toString()); 121 } 122 } 123 public static void scalarHandlerDemo() throws SQLException { 124 //单结果集查询 125 String sql = "select count(*) from zhangwu;"; 126 Long num = qRunner.query(connection, sql, new ScalarHandler<Long>()); 127 System.out.println(num); 128 } 129 public static void mapHandlerDemo() throws SQLException { 130 //结果集第一行数据 封装到map集合中 131 String sql = "select * from zhangwu;"; 132 Map< String,Object > map= qRunner.query(connection,sql,new MapHandler()); 133 for(String key : map.keySet()) { 134 System.out.println(key + "..." + map.get(key)); 135 } 136 } 137 public static void mapListHandlerDemo() throws SQLException { 138 // 封装到map集合中 适合少量数据 139 String sql = "select * from zhangwu;"; 140 List<Map<String, Object>> listmap = qRunner.query(connection, sql, new MapListHandler()); 141 for(Map<String, Object> mapchild : listmap) { 142 for(String key : mapchild.keySet()) { 143 System.out.print(key + " = " + mapchild.get(key) + " "); 144 } 145 System.out.println(""); 146 } 147 } 148 }
Java 使用 Dbutils 工具类库 操作mysql
标签:string span tco etl get private lex sys cat
本文系统来源:http://www.cnblogs.com/wwcherish/p/8037705.html
内容总结
以上是互联网集市为您收集整理的Java 使用 Dbutils 工具类库 操作mysql全部内容,希望文章能够帮你解决Java 使用 Dbutils 工具类库 操作mysql所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错,欢迎将互联网集市网站推荐给程序员好友。
内容备注
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 gblab@vip.qq.com 举报,一经查实,本站将立刻删除。
内容手机端
扫描二维码推送至手机访问。