Question

我正在尝试下面的代码来建立数据库连接，但它不起作用。

string connstr="jdbc:odbc:DRIVER={MySQL ODBC 3.51 Driver};SERVER=SERVER_NAME;DATABASE=db_name;UID=userpwd;PWD=userpwd";
string connstr2="jdbc:odbc:DRIVER={{MySQL ODBC 3.51 Driver}};SERVER=SERVER_NAME;DATABASE=db_name;UID=userpwd;PWD=userpwd";

Connection con = DriverManager.getConnection(connstr);

正如您所看到的，我尝试将“jdbc:odbc:”添加到odbc connection字符串，并尝试将双重卷曲替换为单个。

我在这里做错了什么？

Answer 1

这里有一个描述了许多方法的更详细的方法：

//STEP 1. Import required packages
import java.sql.*;

public class FirstExample {
   // JDBC driver name and database URL
   static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";  
   static final String DB_URL = "jdbc:mysql://localhost/EMP";

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

   public static void main(String[] args) {
   Connection conn = null;
   Statement stmt = null;
   try{
      //STEP 2: Register JDBC driver
      Class.forName("com.mysql.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, first, last, age FROM Employees";
      ResultSet rs = stmt.executeQuery(sql);

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

         //Display values
         System.out.print("ID: " + id);
         System.out.print(", Age: " + age);
         System.out.print(", First: " + first);
         System.out.println(", Last: " + last);
      }
      //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
   }//end try
   System.out.println("Goodbye!");
}//end main
}//end FirstExample

如何在Java中构建“JDBC ODBC驱动程序连接字符串”？

1 个答案: