Detailed operation process of Java connecting to SQL Server database
1. Specify the JDK version and download the driver
1.1 JDK version view
win + r输入cmd,命令窗口输入java --version
1.2 SQL Server official website download driver
SQL Server driver download direct address
下载完成后解压到自己熟悉的目录，不出意外的话你会看到以下文件
1.3 Load driver class
package com.alon.sqlutils;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class JDBCTest {
public static void main(String[] args) {
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
String dburl = "jdbc:sqlserver://localhost:1433;DatabaseName = student;
String userName = "sa";//填写自己的数据库名称
String userPwd = "root";//数据库对应密码
try {
Class.forName(driverName);
System.out.println("连接成功!!!");
} catch (ClassNotFoundException e) {
e.printStackTrace();
System.out.println("驱动加载失败");
}
try {
Connection dbcon = DriverManager.getConnection(dburl,userName,userPwd);
System.out.println("数据库连接成功！");
} catch (SQLException e) {
e.printStackTrace();
System.out.println("连接失败");
}
}
}
1.4 eclipse import driver jar package
目录结构
- Right-click the current project file, select
build path, and selectAdd External Archive...
- Click to enter the ``Add External Archive...
，然后就会出现下图，选择一个符合你JDk版本的jar` package
- After the addition is completed, a directory will be automatically generated under the project directory
Reference Libraries, and there will also be ajardriver file
2. Run the program
不出意外的意外的话，你会看到
别慌先来看看网上的办法，找了一下午结果还没解决, (I didn’t say that others are bad here, but it is aimed at my problem, which can’t be solved)
2.1 Final ending plan
只需要在上述驱动类代码中改一改就完美解决··
2.2 Read data data
读取数据库数据代码
package com.alon.sqlutils;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class ReadDatabase {
public static void main(String[] args) {
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
// 方案一
String dburl = "jdbc:sqlserver://localhost:1433;DatabaseName = SQL_Road;encrypt=false";
String userName = "sa";
String userPwd = "root";
try {
Class.forName(driverName);
System.out.println("连接成功!!!");
} catch (ClassNotFoundException e) {
e.printStackTrace();
System.out.println("驱动加载失败");
}
try {
Connection dbcon = DriverManager.getConnection(dburl,userName,userPwd);
System.out.println("数据库连接成功！");
//创建SQl命令对象
Statement stmt = dbcon.createStatement();
ResultSet rs = stmt.executeQuery("select * from Customers");
//循环读出每一条数据
while(rs.next()) {
System.out.println(rs.getInt("客户ID")+"\t" +rs.getString("姓名")+"\t"+rs.getString("地址"));
}
//关闭对象连接
stmt.close();
//关闭数据库连接
dbcon.close();
} catch (SQLException e) {
e.printStackTrace();
System.out.println("连接失败");
}
}
}
数据库数据展示
控制台读取数据展示
