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：
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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：
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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();}} |
希望本文所述对大家java程序设计有所帮助。
原文链接：https://blog.csdn.net/moliyiran/article/details/52419212
