src/sanrenxing/teacher/dao/impl/TeacherDaoImpl.java

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package sanrenxing.teacher.dao.impl;




import sanrenxing.Class.domain.ClassName;
import sanrenxing.teacher.dao.TeacherDao;
import sanrenxing.teacher.domain.RoleName;
import sanrenxing.teacher.domain.Teacher;
import sanrenxing.teacher.domain.TeacherTo;
import sanrenxing.utils.JdbcUtils;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * 编写者：胡标
 * 功能：教师管理
 */

public class TeacherDaoImpl implements TeacherDao {
    /**
     * 将教师实体对象添加到数据库teacher表中
     *
     * @param teacher 教师对象
     * @return 成功添加的行数(1 : 添加成功 ; 0 : 添加失败)
     */
    @Override
    public int add(Teacher teacher) {
        //声明数据库连接对象
        Connection conn=null;
        //声明预编译语句对象
        PreparedStatement pstmt=null;
        //定义影响行数的变量
        int rows=0;
        try {
            //实例化数据库连接对象
            conn= JdbcUtils.getConnection();
            //编写SQL语句字符串
            String sql="insert into teacher values(?,?,?,?,?,?)";
            //实例化预编译语句对象
            pstmt=conn.prepareStatement(sql);
            //设置SQL语句中占位符赋值
            pstmt.setInt(1,teacher.getTeacherId());
            pstmt.setString(2,teacher.getTeacherName());
            pstmt.setInt(3,teacher.getRoleId());
            pstmt.setString(4,teacher.getTeacherNum());
            pstmt.setString(5,teacher.getTeacherPwd());
            pstmt.setString(6,teacher.getTeacherPhone());

            //使用预编译语句对象执行SQL语句，返回影响的行数
            rows=pstmt.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
            //抛出运行时异常
            throw new RuntimeException(e.getMessage(),e);