JAVA使用jdbc连接MYSQL简单示例

以下展示的为JAVA使用jdbc连接MYSQL简单示例：

 import java.sql.DriverManager;
 import java.sql.ResultSet;
 import java.sql.SQLException;

 import com.mysql.jdbc.Connection;
 import com.mysql.jdbc.Statement;

 public class MysqlDBManager {
     // 驱动程序名
     private static String DBDRIVER = "com.mysql.jdbc.Driver";
     // URL指向要访问的数据库名
     private static String SERVERURL = "";
     // MySQL配置时的用户名
     private static String USER = "";
     // MySQL配置时的密码
     private static String PASSWORD = "";
     //连接对象
     private Connection conn = null;
     //
     private Statement stmt = null;
     //设计为单例模式
     private static MysqlDBManager uniqueInstance = null;

     private MysqlDBManager() {
         ReadProperty readUtil = new ReadProperty();
         SERVERURL = "jdbc:mysql://"+readUtil.getProperties("host")+":3306/"+readUtil.getProperties("database");
         USER = readUtil.getProperties("user");
         PASSWORD = readUtil.getProperties("password")==null?"":readUtil.getProperties("password");
         initConnect();
     }

     public static MysqlDBManager getInstance() {
         if (uniqueInstance == null) {
             uniqueInstance = new MysqlDBManager();
         }
         return uniqueInstance;
     }
     /**
      * 初始化数据库连接
      */
     private void initConnect() {
         if (null == conn) {
             // 加载驱动程序
             try {
                 Class.forName(DBDRIVER);
                 // 连续数据库
                 conn = (Connection) DriverManager.getConnection(SERVERURL,USER, PASSWORD);
                 stmt = (Statement)conn.createStatement();
             } catch (ClassNotFoundException e) {
                 System.out.println("Can`t find the mysql Driver!");
             } catch (SQLException e) {
                 System.out.println("Can`t connect to mysql DB");
             }
         }
     }
     /**
      * 获取连接实例
      * @return
      */
     private Statement getDBManager(){
         if(null == stmt){
             initConnect();
         }
         return stmt;
     }
     /**
      * 执行查询SQL语句
      * @param sql
      * @return
      */
     public ResultSet executeQuery(String sql){
         ResultSet rs = null;
         try {
             rs = getDBManager().executeQuery(sql);
         } catch (SQLException e) {
             System.out.println("Excute sql error");
         }
         return rs;
     }
     /**
      * 执行update,insert语句
      * @param sql
      * @return
      */
     public int excuteUpdate(String sql){
         int executeUpdate = 0;
         try {
             executeUpdate = getDBManager().executeUpdate(sql);
         } catch (SQLException e) {
             System.out.println("Excute sql error");
         }
         return executeUpdate;
     }

     /**
      * 批量执行执行update,insert语句
      * @param sql
      * @return
      */
     public int batchUpdate(String[] sql){
         try {
             for(String s : sql){
                 if(s == null || "".equals(s))
                     continue;
                 getDBManager().addBatch(s);
             }
             int[] executeBatch = getDBManager().executeBatch();
             return executeBatch.length;
         } catch (SQLException e) {
             System.out.println("Excute sql error");
         }
         return 0;
     }

 }

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