Java访问SQLServer数据库

安装jar包

由于maven仓库不支持sqljdbc4的下载，所以我们手动下载sqljdbc4.jar，然后在添加到构建路径

如果用了Jenkins做持续集成，最好在pom.xml里引用下sqljdbc4.jar，如下

            com.microsoft.sqlserver
            sqljdbc4
            4.0
            system
            ${basedir}/libs/sqljdbc4.jar

数据库工具类

DBUtil.java

package test.java.utils;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBUtil {

    //设置数据库名称
    private final static String URL = "jdbc:sqlserver://192.168.93.131:8157;DatabaseName=Star-Notify";
    private static final String USER="username";
    private static final String PASSWORD="password";

    private static Connection conn=null;
    //静态代码块（将加载驱动、连接数据库放入静态块中）
    static{
        try {
            //1.加载驱动程序
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            //2.获得数据库的连接
            conn=(Connection)DriverManager.getConnection(URL,USER,PASSWORD);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    //对外提供一个方法来获取数据库连接
    public  Connection getConnection(){
        return conn;
    }
}

查询数据库例子

import test.java.utils.DBUtil;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**
 * Author: 灵枢
 * Date: 2018/11/15
 * Time: 14:18
 * Description:数据库操作
 */
public class Dao {
    private static Connection conn = null;
    private static Statement stmt = null;
    
    public static String getEmailAddress(String email){
        String sql = "SELECT Receiver FROM EmailReceiver WHERE Receiver='"+email+"';";
        DBUtil dbUtil = new DBUtil();
        String result="";
        try {
            conn = dbUtil.getConnection();
            stmt = conn.createStatement();
            ResultSet set = stmt.executeQuery(sql);
            if(set.next()){
                result = set.getString(1);
            }
            conn.close();
            stmt.close();
            return result;
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return "";
    }
}