Java sql server数据库连接成功

Posted 2020-12-29 borter

 1 import java.sql.Connection;
 2 import java.sql.SQLException;
 3 import java.sql.Statement;
 4 import java.sql.DriverManager;
 5 import java.sql.ResultSet;
 6 
 7      
 8 public class JavaE2 {
 9     public static void main(String[] args) {
10         Connection conn;
11         Statement stmt;
12         ResultSet rs;
13         String url = "jdbc:sqlserver://localhost:1433;DatabaseName=test;";
14         String sql = "select * from student";
15         
16         
17             try {
18                 Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); 
19                 
20             } catch (Exception ex) {
21                 System.out.println("数据库加载失败");
22             }
23         
24         
25         try {
26             // 连接数据库
27             conn = DriverManager.getConnection(url, "sa", "sa");
28             // 建立Statement对象
29             stmt = conn.createStatement();
30             /**
31              * Statement createStatement() 创建一个 Statement 对象来将 SQL 语句发送到数据库。
32              */
33             // 执行数据库查询语句
34             rs = stmt.executeQuery(sql);
35             /**
36              * ResultSet executeQuery(String sql) throws SQLException 执行给定的 SQL
37              * 语句，该语句返回单个 ResultSet 对象
38              */
39             while (rs.next()) {
40                 int id = rs.getInt("SID");
41                 String name = rs.getString("SNAME");
42                 int age = rs.getInt("SSEX");
43                 System.out.println("Sno:" + id + "	Same:" + name + "	Sage:" + age);
44             }
45             if (rs != null) {
46                 rs.close();
47                 rs = null;
48             }
49             if (stmt != null) {
50                 stmt.close();
51                 stmt = null;
52             }
53             if (conn != null) {
54                 conn.close();
55                 conn = null;
56             }
57         } catch (SQLException e) {
58             e.printStackTrace();
59             System.out.println("数据库连接失败");
60         }
61     }
62 }