whoami的博客

创建porperties文件driver=com.mysql.jdbc.Driverurl=jdbc:mysql://localhost:3306/user?useUnicode=true&characterEncoding=UTF-8username=rootpassword=123456initialSize=10maxActive=20minIdle=5maxWait=3000数据库连接、关闭、事务（开启、提交、回滚）工具类package com.whoami.s.

package com.whoami.JDBC;import java.text.ParseException;import java.text.SimpleDateFormat;public class DateUtils { private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); // 1.字符串转换为util.Date public static java.util.Dat

先创建一个properties文件driver = com.mysql.jdbc.Driverurl = jdbc:mysql://localhost:3306/xxxxusername = rootpassword = xxxx创建一个类public class DBUtils{ private static final Properties PROPERTIES = new Properties();//存储配置文件的map static { InputStream is .