jdbc连接mysql的配置文件_如何实现jdbc连接数据库并通过配置文件调用数据的方法（代码）...
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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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