Java基于jdbc实现的增删改查操作示例
本文实例讲述了Java基于jdbc实现的增删改查操作。分享给大家供大家参考,具体如下:
增删改操作:
package java_web; import java.sql.DriverManager; import java.sql.SQLException; import com.mysql.jdbc.Connection; import com.mysql.jdbc.Statement; /** * jdbc CURD * @author Administrator * */ public class rbacDemo { public final static String URL="jdbc:mysql://localhost:3306/test"; public final static String USERNAME="root"; public final static String PASSWORD=""; public final static String DRIVER="com.mysql.jdbc.Driver"; /** * 插入 */ public static void insert(){ try { Class.forName(DRIVER); Connection conn = (Connection) DriverManager.getConnection(URL,USERNAME,PASSWORD); String sql = "insert into test(name,sex)values('fifi2',1),('fifi3',3)"; Statement state = (Statement) conn.createStatement(); int result=state.executeUpdate(sql); state.close(); conn.close(); System.out.println(result+"success"); } catch (ClassNotFoundException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (SQLException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } } public static void update(){ try { Class.forName(DRIVER); Connection conn = (Connection) DriverManager.getConnection(URL,USERNAME,PASSWORD); String sql = "update test set name='fifi3aaa' where name='fifi3'"; Statement state = (Statement) conn.createStatement(); int result=state.executeUpdate(sql); state.close(); conn.close(); System.out.println(result+"success"); } catch (ClassNotFoundException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (SQLException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } } public static void delete(){ try { Class.forName(DRIVER); Connection conn = (Connection) DriverManager.getConnection(URL,USERNAME,PASSWORD); String sql = "delete from test where name='fifi3aaa'"; Statement state = (Statement) conn.createStatement(); int result=state.executeUpdate(sql); state.close(); conn.close(); System.out.println(result+"success"); } catch (ClassNotFoundException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (SQLException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } } public static void main(String[] args){ //insert(); //update(); delete(); } }
查询操作:
package java_web; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import com.mysql.jdbc.Connection; import com.mysql.jdbc.Statement; public class jdbcQueryDemo { public final static String URL="jdbc:mysql://localhost:3306/test"; public final static String USERNAME="root"; public final static String PASSWORD=""; public final static String DRIVER="com.mysql.jdbc.Driver"; public static void query(){ try { Class.forName(DRIVER); Connection conn = (Connection) DriverManager.getConnection(URL,USERNAME,PASSWORD); String sql = "select id,name,sex from test where id=3"; Statement state = (Statement) conn.createStatement(); ResultSet rs=state.executeQuery(sql); while(rs.next()){ //rs.getInt("id"); int id=rs.getInt(1); String name=rs.getString(2); int sex=rs.getInt(3); //String time=rs.getString("vtime"); System.out.println(id+"=="+name+"=="+sex+"=="); } rs.close(); state.close(); conn.close(); } catch (ClassNotFoundException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (SQLException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } } public static void main(String[] args) { // TODO 自动生成的方法存根 query(); } }
更多关于java相关内容感兴趣的读者可查看本站专题:《Java使用JDBC操作数据库技巧总结》、《Java+MySQL数据库程序设计总结》、《Java数据结构与算法教程》、《Java文件与目录操作技巧汇总》、《Java操作DOM节点技巧总结》和《Java缓存操作技巧汇总》
希望本文所述对大家java程序设计有所帮助。
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