javaweb连接sqlserver

在JavaWeb中连接SQL Server，需要使用JDBC驱动程序。您首先需要下载并安装Microsoft JDBC驱动程序，然后在Java代码中使用它来连接SQL Server数据库。您还需要提供有关数据库的信息，如数据库URL、用户名和密码。

示例代码:

import java.sql.*;

public class SQLConnection {
    public static void main(String[] args) {
        // JDBC driver name and database URL
        final String JDBC_DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
        final String DB_URL = "jdbc:sqlserver://<hostname>:<port>;databaseName=<dbname>";

        //  Database credentials
        final String USER = "username";
        final String PASS = "password";

        Connection conn = null;
        Statement stmt = null;
        try {
            //STEP 2: Register JDBC driver
            Class.forName(JDBC_DRIVER);

            //STEP 3: Open a connection
            System.out.println("Connecting to database...");
            conn = DriverManager.getConnection(DB_URL, USER, PASS);

            //STEP 4: Execute a query
            System.out.println("Creating statement...");
            stmt = conn.createStatement();
            String sql;
            sql = "SELECT id, name, age FROM Employee";
            ResultSet rs = stmt.executeQuery(sql);

            //STEP 5: Extract data from result set
            while (rs.next()) {
                //Retrieve by column name
                int id = rs.getInt("id");
                String name = rs.getString("name");
                int age = rs.getInt("age");

                //Display values
                System.out.print("ID: " + id);
                System.out.print(", Name: " + name);
                System.out.println(", Age: " + age);
            }
            //STEP 6: Clean-up environment
            rs.close();
            stmt.close();
            conn.close();
        } catch (SQLException se) {
            //Handle errors for JDBC
            se.printStackTrace();
        } catch (Exception e) {
            //Handle errors for Class.forName
            e.printStackTrace();
        } finally {
            //finally block used to close resources
            try {
                if (stmt != null)
                    stmt.close();
            } catch (SQLException se2) {
            }// nothing we can do
            try {
                if (conn != null)
                    conn.close();
            } catch (SQLException se) {
                se.printStackTrace();
            }//end finally try
       JavaWeb连接SQL Server可以使用JDBC驱动程序。首先需要在项目中导入sqljdbc.jar驱动包，然后使用JDBC API和配置好的数据库连接信息连接数据库，进行CRUD操作。