javaweb:jdbc配置文件
作者:互联网
jdbc配置文件
1.jdbc配置文件是什么?
配置过程:
建立文件:dp.properties
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/new_schema
password=your-password
username=root
使用配置文件:
放在jdbc工具类中
Properties properties=new Properties();//创建文件对象
properties.load(new FileInputStream(“D:\javac\projects\jdbc学习\src\dp.properties”));// 读取文件
再赋值
driverClassName=properties.getProperty(“driverClassName”);
url=properties.getProperty("url");
password=properties.getProperty("password");
usernane=properties.getProperty("username");
import java.io.FileInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;
public class TYBU {
private static final String driverClassName;
private static final String url;
private static final String password;
private static final String usernane;
static {
Properties properties=new Properties();
try {
properties.load(new FileInputStream("D:\\javac\\projects\\jdbc学习\\src\\dp.properties"));
} catch (IOException e) {
e.printStackTrace();
}
driverClassName=properties.getProperty("driverClassName");
url=properties.getProperty("url");
password=properties.getProperty("password");
usernane=properties.getProperty("username");
//url="jdbc:mysql://localhost:3306/new_schema";
//driverClassName="com.mysql.jdbc.Driver";
//password="your-password";
//usernane="root";
}
public static void loadDriver() throws ClassNotFoundException {
try{
Class.forName(driverClassName);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
public static Connection getConnection(){
Connection conn=null;
try {
loadDriver();
conn= DriverManager.getConnection(url,usernane,password);
} catch (ClassNotFoundException | SQLException e) {
e.printStackTrace();
}
return conn;
}}
结果:
配置成功
在测试运行了
标签:driverClassName,jdbc,getProperty,javaweb,配置文件,url,password,properties 来源: https://blog.csdn.net/qq_51813155/article/details/121188265