【Java】连接数据库SQLServer

工具： eclipse
　　　 Microsoft SQL Server
　　　 SQL Server连接驱动：mssql-jdbc-6.4.0.jre8.jar

SQL script代码⟳

↓CloseCode↓

CREATE DATABASE test
USE test
go

CREATE TABLE a 
(
	a1 nchar(3),    		--String  NString
	a2 nvarchar(20),		--String  NString
	a3 int,				--int	  int
	a4 float,			--double  double
	PRIMARY KEY (a1)
);

SELECT *
FROM a 
ORDER BY 1;

INSERT INTO a (a1, a2, a3, a4)
VALUES ();

• 步骤：
  1. 将SQL打开，输入脚本script，运行
  2. 打开eclipse，新建JAVA项目
  3. 鼠标指向自己新建的项目，右击，建立文件夹
  4. 把mssql复制进文件夹内
  5. 右击mssql，点击build path -〉 add to build path
  6. 创建包com.jdbc，把两个JAVA文件复制进包中(JAVA database connectivity)
  7. 右击InsertSample.java，选properties
  8. Text file encoding 选other UTF-8采用Unicode字符串

Java 连接⟳

所需的jar包下载⟳

百度网盘 提取码: dm6m

使用方法：
　　1. 在工程目录中创建lib文件夹，将下载好的JDBC（jar包）放到该文件夹下。
　　2. 右键工程名，选择 Buiding Path | Configure Buiding Path ，在java build path中的Libraries分页中选择Add JARs...，选择刚才添加的JDBC（jar包）。

ConnectionProperty代码⟳

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package com.jdbc;

import com.microsoft.sqlserver.jdbc.SQLServerDataSource;

public class ConnectionProperty 
{
	//Class.forName(...);	//这句话过时了 完全不需要
	//DriverManager.getConnection(...) //过时了 JAVA1.0中用
	public static SQLServerDataSource getDateSource() 
	{
		SQLServerDataSource ds = new SQLServerDataSource();
		ds.setServerName("10.177.7.47"); //本机IPv4号
		ds.setPortNumber(1433); 	//端口号
		ds.setUser("sa");		//用户名
		ds.setPassword("123");	//密码
		ds.setDatabaseName("test");		//数据库名称
		ds.setSendTimeAsDatetime(false);
		return ds;
	}
}

InsertSample代码⟳

↓CloseCode↓

package com.jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

import javax.sql.DataSource;

public class InsertSample {

	public static void main(String[] args) {
		//insertA();
		selectA();
	}
	
	public static void insertA() {
		DataSource ds = ConnectionProperty.getDataSource();
		String sql = "INSERT INTO a (a1, a2, a3, a4) "
				+ "VALUES (?, ?, ?, ?)";
		
		try (Scanner scanner = new Scanner(System.in);
				Connection con = ds.getConnection();
				PreparedStatement pstmt = con.prepareStatement(sql)) {
			System.out.print("a1=");
			String a1 = scanner.nextLine();
			System.out.print("a2=");
			String a2 = scanner.nextLine();
			System.out.print("a3=");
			int a3 = scanner.nextInt();
			System.out.print("a4=");
			double a4 = scanner.nextDouble();
			
			pstmt.setNString(1, a1);
			pstmt.setNString(2, a2);
			pstmt.setInt(3, a3);
			pstmt.setDouble(4, a4);
			
			int rowCount = pstmt.executeUpdate();
			System.out.println("插入" + rowCount + "行");
			
//			System.out.println("a1=" + a1);
//			System.out.println("a2=" + a2);
//			System.out.println("a3=" + a3);
//			System.out.println("a4=" + a4);
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public static void selectA() {
		DataSource ds = ConnectionProperty.getDataSource();
		String sql = "SELECT a1, a2, a3, a4 "
				+ "FROM a "
				+ "WHERE a3 > ? "
				+ "ORDER BY a1";
		
		try (Scanner scanner = new Scanner(System.in);
				Connection con = ds.getConnection();
				PreparedStatement pstmt = con.prepareStatement(sql)) {
			
			System.out.print("a3=");
			int a3 = scanner.nextInt();
			
			pstmt.setInt(1, a3);
			
			ResultSet rs = pstmt.executeQuery();
			while (rs.next()) {
				System.out.print(rs.getNString("a1") + "\t");
				System.out.print(rs.getNString("a2") + "\t");
				System.out.print(rs.getInt("a3") + "\t");
				System.out.println(rs.getDouble("a4"));
			}
			
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

提示⟳

可保存这此Java项目，下次连接可直接导入，只需修改部分信息。