本篇文章給大家帶來的內容是關于如何實現jdbc連接數據庫并通過配置文件調用數據的方法(代碼) ，有一定的參考價值，有需要的朋友可以參考一下，希望對你有所幫助。

Dbutil類

package com.db;

import java.io.IOException;

import java.io.InputStream;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.util.Properties;

public class Dbutil {

private String driver = "com.mysql.cj.jdbc.Driver";

private String host = "localhost";

private String post = "3306";

private String db = "student";

private String user = "root";

private String psd = "123456";

private String url = "";

private Connection con = null;

public Dbutil() {

Properties pro = new Properties();

InputStream in = Dbutil.class.getResourceAsStream("db.properties");

try {

pro.load(in);

this.driver =pro.getProperty("driver");

this.host= pro.getProperty("host");

this.post=pro.getProperty("post");

this.db=pro.getProperty("db");

this.user=pro.getProperty("user");

this.psd=pro.getProperty("psd");

this.url = "jdbc:mysql://" + host + ":" + post + "/" + db + "?serverTimezone=PRC&useSSL=false";

Class.forName(driver);

this.con=DriverManager.getConnection(url,user,psd);

} catch (IOException e) {

e.printStackTrace();

} catch (ClassNotFoundException e) {

e.printStackTrace();

} catch (SQLException e) {

e.printStackTrace();

}

}

public Dbutil(String host, String post, String db, String user, String psd){

this.host = host;

this.post = post;

this.db = db;

this.user = user;

this.psd = psd;

this.url = "jdbc:mysql://" + host + ":" + post + "/" + db + "?serverTimezone=PRC&useSSL=false";

try {

Class.forName(driver);

this.con=DriverManager.getConnection(url,user,psd);

} catch (ClassNotFoundException e) {

e.printStackTrace();

} catch (SQLException e) {

e.printStackTrace();

}

}

public String getDriver() {

return driver;

}

public void setDriver(String driver) {

this.driver = driver;

}

public String getHost() {

return host;

}

public void setHost(String host) {

this.host = host;

}

public String getPost() {

return post;

}

public void setPost(String post) {

this.post = post;

}

public String getDb() {

return db;

}

public void setDb(String db) {

this.db = db;

}

public String getUser() {

return user;

}

public void setUser(String user) {

this.user = user;

}

public String getPsd() {

return psd;

}

public void setPsd(String psd) {

this.psd = psd;

}

public String getUrl() {

return url;

}

public void setUrl(String url) {

this.url = url;

}

public Connection getCon() {

return con;

}

public void setCon(Connection con) {

this.con = con;

}

}

配置文件 db.properties

driver=com.mysql.cj.jdbc.Driver

host=localhost

post=3306db=student

user=root

psd=123456

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