resultsetselectdemo.java

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package resultset;

import java.sql.*;

public class ResultSetSelectDemo {
  public ResultSetSelectDemo() {
    //定义数据库连接的驱动程序
    String driver = "org.gjt.mm.mysql.Driver";
    //定义MySQL数据库的连接地址
    String url = "jdbc:mysql://localhost:3306/EmployeeEBKC10";
    //声明连接类
    Connection conn = null;
    //employee数据表的选择SQL语句
    String sql = "select * from employeeTable";
    try {
      //使用JDBC技术创建数据库连接
      Class.forName(driver);
      //使用DriverManager类的getConnection()方法建立连接
      conn = DriverManager.getConnection(url, "root", "test");
      //通过Statement查询记录，使返回数据集可以前后移动
      Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
                                            ResultSet.CONCUR_READ_ONLY);
      //取得返回的记录集
      ResultSet rs = stmt.executeQuery(sql);
      //移到第一行和显示内容
      rs.first();
      this.showCurrentRow(rs);
      //移到最后一行和显示内容
      rs.last();
      this.showCurrentRow(rs);
      //移到第6行和显示内容
      rs.absolute(6);
      this.showCurrentRow(rs);
      //上移1行和显示内容
      rs.previous();
      this.showCurrentRow(rs);
      //下移2行和显示内容
      rs.next();
      rs.next();
      this.showCurrentRow(rs);
    }catch(Exception e){
      e.printStackTrace();
    }
  }
  //显示当前记录的方法
  public void showCurrentRow(ResultSet rs) throws Exception{
    String employeeId = rs.getString("employeeId");
    String departmentId = rs.getString("departmentId");
    String employeeName = rs.getString("employeeName");
    String phone = rs.getString("phone");
    String address = rs.getString("address");
    java.sql.Timestamp joinDate = rs.getTimestamp("joinDate");
    java.sql.Timestamp resignDate = rs.getTimestamp("resignDate");
    int employeeStatus = rs.getInt("employeeStatus");
    System.out.println(employeeId + "\t" + departmentId + "\t" +
                       employeeName + "\t" + phone + "\t" +
                       address + "\t" + joinDate + "\t" +
                       resignDate + "\t" + employeeStatus);
  }
  public static void main(String[] args) {
    ResultSetSelectDemo resultSetSelectDemo1 = new ResultSetSelectDemo();
  }
}