src/edu/school/dao/impl/TeacherDaoImpl.java

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

package edu.school.dao.impl;

import edu.school.dao.StudentDao;
import edu.school.dao.TeacherDao;
import edu.school.entity.*;
import edu.school.utils.C3p0Utils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;


public class TeacherDaoImpl implements TeacherDao {
    private QueryRunner runner=new QueryRunner(C3p0Utils.getDs());

    @Override
    public int addTeacher(Teacher teacher) {
        try {
            //执行插入sql
            runner.update("insert into teacher(tno,realname,pwd,createDate) values (?,?,?,?)",
                    teacher.getTno(),teacher.getRealname(),teacher.getPwd(),teacher.getCreateDate());
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
        return 1;
    }

    @Override
    public Teacher queryByTno(String tno) {
        try {//返回查询的信息
            return runner.query("select * from teacher where tno=?", new BeanHandler<Teacher>(Teacher.class),tno);
        } catch (SQLException e) {
            throw new RuntimeException(e);//抛出运行异常
        }
    }

    @Override
    public int queryCount() {
        String sql="select count(*) from teacher";
        try {
            Long count =  (Long) runner.query(sql, new ScalarHandler());
            //将long的类型转成int类型
            return count.intValue();
        } catch (SQLException e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        }
    }

    @Override
    public List<Teacher> findAllByPage(PageTool pageTool) {
        String sql="select * from teacher limit ?,?";
        List<Teacher> teachers=null;
        try {
            teachers=runner.query(sql,new BeanListHandler<Teacher>(Teacher.class),pageTool.getStartIndex(),pageTool.getPageSize());
        } catch (SQLException e) {