【Java】连接数据库SQLServer

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

sql script代码

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. 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
    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
  • @H_301_33@

    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

    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

    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,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,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。

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