JAVA环境配置与连接数据库

妖狐艹你老母 2022-12-24 13:56 129阅读 0赞

## 一.java环境配置 ##

①[配置教程方法][Link 1]  
安装包–>  
https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70]  
然后配置环境  
跟着上面的配置环境变量教程走就行了

#然后用
    \jdk1.8.0_291\jre\bin\java.exe打开文件就好了

②idea配置方法  
[idea安装教程][idea]

注意事项:
    #①如果显示This license BISACXYELK has been cancelled.
    解决方法:①通过无限重置进行更改-->https://www.cnblogs.com/yntz/p/14643610.html
    ②通过更改hosts的配置文件进行修改-->即进行屏蔽一个域名的文件
    127.0.0.1 jrebel.npegeek.com

## 二.sqlserver环境配置 ##

## 1).配置账号密码类 ##

①配置安全验证方式  
右键属性  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 1]  
然后改为sql server和window身份验证

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 2]

②更改密码  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 3]  
更改密码  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 4]

## 三.配置端口连接 ##

①配置sql server里面的端口  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 5]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 6]  
[按照这个步骤改][Link 2]  
注意点  
控制面板里面启动telnet服务  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 7]

## 四 连接java ##

注意点：  
创建工程的时候环境一定要选1.8 否则后面一定会报错  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 8]  
更改环境方法  
①  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 9]  
②![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 10]  
③选择完文件后就配置完了  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 11]

然后在类里面添加这种类型  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 12]

1.连接java代码

import java.sql.*;
    public class 范德萨 { 
    	   public static void main(String []args) { 
    	         String driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
    	         String dbURL="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=数据库名字";
    	         String userName="账号";
    	         String userPwd="密码";
    	          try
    	        { 
    	            Class.forName(driverName);
    	            Connection dbConn=DriverManager.getConnection(dbURL,userName,userPwd);
    	            Statement st = dbConn.createStatement();
    	            ResultSet rs = st.executeQuery("select * from sysobjects where xtype='U'");
    	            while (rs.next()) { 
    	              System.out.println(rs.getString(1));
    	            }
    	            System.out.println("success!");
    	         }
    	          catch(Exception e)
    	       { 
    	            e.printStackTrace();
    	            System.out.print("fail!");
    	       }
    	    }
    }

2.导入库  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 13]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 14]  
导入驱动文件  
如文件目录路径  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 15]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMzOTQyMDQw_size_16_color_FFFFFF_t_70 16]  
然后连接就好了

[Link 1]: https://jingyan.baidu.com/article/0202781175839b1bcc9ce529.html
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[idea]: http://www.xmpojie.com/5155.html
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[Link 2]: https://www.cnblogs.com/chenlove/p/9159227.html
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