operatormodel.java

来自「java课程的资料以及实验的代码」· Java 代码 · 共 73 行

/*
 *OperatorModel.java：建立操作员实体类。
 *包括：与数据库进行改、查操作。
 */
 
import java.sql.*;
import java.math.*;

public class OperatorModel {
   String name;
   String pwd;
   DbConn dbc;
   Connection conn;
   public OperatorModel() {
   }
   public OperatorModel(String n,String e) {
   	name = n;
   	pwd = e;
   }
   public void setAll(String e,String p) {
   	name = e;
   	pwd = p;
   }
   public String getName() {
   	return name;
   }
   private String getPwd() {
   	return pwd;
   }
   
   public int verify() {
      dbc = new DbConn();
      conn = dbc.getConnection();
      int cnt=0;
      String sql;
      sql = "SELECT count(*) FROM operator where name = '"+this.name+"' and pwd = '"+this.pwd+"'";
      try {
      Statement stmt = conn.createStatement();
      ResultSet rset = stmt.executeQuery (sql);
      while (rset.next()) {
        cnt = rset.getInt(1);
      }
      conn.commit();  
      rset.close();
      stmt.close();
      conn.close();
      }
      catch (java.sql.SQLException s) {
	System.out.println("exception: " + s.getMessage());
      }
      return cnt;
    } 
    
    public void update() {
      dbc = new DbConn();
      conn = dbc.getConnection();
      try {
      PreparedStatement pstmt = 
      conn.prepareStatement("update OPERATOR set PWD = ? where name = ?");
      pstmt.setString(1, pwd);   
      pstmt.setString(2, name);
      pstmt.execute();
      conn.commit();
      conn.close();
      }
      catch (java.sql.SQLException s) {
	System.out.println("exception: " + s.getMessage());
      }
   }
}