mybits学习2

合集 - 软件工程日报(64)

1.新学期目标2024-03-052.打卡2024-05-293.打卡22024-05-294.打卡32024-05-295.打卡 42024-05-296.打卡52024-06-137.打卡62024-06-138.打卡72024-06-169.打卡82024-06-1610.打卡92024-06-1611.打卡102024-06-1612.结对作业（地铁查询项目）012024-06-1613.结对作业（地铁项目）022024-06-1614.结对作业（地铁项目）032024-06-1615.结对作业（地铁项目）042024-06-1616.结对作业（地铁项目）052024-06-1617.结对作业（地铁项目）062024-06-1618.结对作业（地铁项目）072024-06-1619.结对作业（地铁项目）082024-06-1620.结对作业（地铁项目）092024-06-1621.结对作业（地铁项目）102024-06-1622.结对作业（地铁项目）112024-06-1623.结对作业（地铁项目）122024-06-1624.结对作业（地铁项目）132024-06-1625.结对作业（地铁项目）142024-06-1626.五一冲刺（政策查询系统）12024-06-1627.五一冲刺（政策查询系统）22024-06-1628.政策查询系统（安卓）12024-06-1629.政策查询系统（安卓）22024-06-1630.政策查询系统（安卓）32024-06-1631.政策查询系统（安卓）42024-06-1632.政策查询系统（安卓）52024-06-1633.政策查询系统（安卓）62024-06-1634.政策查询系统（安卓）72024-06-1635.JS开发2024-02-2836.安卓app开发相关2024-02-2837.第一次个人作业（安卓学习记录系统）012024-06-1638.第一次个人作业（安卓学习记录系统）022024-06-1639.第一次个人作业（安卓学习记录系统）032024-06-1640.第一次个人作业（安卓学习记录系统）042024-06-1641.第一次个人作业（安卓学习记录系统）052024-06-1642.第一次个人作业（安卓学习记录系统）062024-06-1643.第一次个人作业（安卓学习记录系统）072024-06-1644.打卡112024-06-1945.打卡122024-06-1946.打卡132024-06-1947.打卡142024-06-1948.打卡152024-06-1949.打卡162024-06-1950.打卡172024-06-1951.打卡182024-06-1952.打卡192024-06-1953.打卡202024-06-1954.python学习2024-06-1955.python学习22024-06-1956.python学习32024-06-1957.Javaweb2024-06-1958.打卡212024-06-1959.fragment学习和使用2024-06-1960.mybits学习12024-06-19

61.mybits学习22024-06-19

62.mybits学习32024-06-1963.课程总结2024-06-1964.个人总结2024-06-19

收起

所花时间（包括上课）：	2h
代码量（行）：	150左右
搏客量（篇）：	1
了解到的知识点：	mybits
备注（其他）：

@Test
public void addStudent()
{
    SqlSession sqlSession=mybatisUtil.getSqlSession();
    studentMapper stuMapper=sqlSession.getMapper(studentMapper.class);
   int res= stuMapper.addStudent(new Student(6,"无敌战胜","神",999));
   if(res>0)
   {
       System.out.println("插入成功");
       sqlSession.commit();
   }
    sqlSession.close();
}
@Test
public void queryAllStudents()
{
    SqlSession sqlSession=mybatisUtil.getSqlSession();
    studentMapper stuMapper=sqlSession.getMapper(studentMapper.class);
    List<Student> students=stuMapper.getAllStudents();
    for (Student student : students) {
        System.out.println(student);
    }
    sqlSession.close();
}
@Test
public void queryStudent()
{
    SqlSession sqlSession=mybatisUtil.getSqlSession();
    studentMapper stuMapper=sqlSession.getMapper(studentMapper.class);
    Student stu=stuMapper.getStudentById(2);
    System.out.println(stu);
    sqlSession.close();
}
@Test
public void updateStudnet()
{
    SqlSession sqlSession=mybatisUtil.getSqlSession();
    studentMapper mapper = sqlSession.getMapper(studentMapper.class);
    int res=mapper.updateStudent(new Student(6,"xxxiaoxing","男",19));
    if(res>0)
    {
        System.out.println("修改成功");
        sqlSession.commit();
    }
    sqlSession.close();
}
@Test
public void deleteStudent()
{
    SqlSession sqlSession=mybatisUtil.getSqlSession();
    studentMapper mapper = sqlSession.getMapper(studentMapper.class);
    int res=mapper.deleteStudent(6);
    if(res>0)
    {
        System.out.println("删除成功");
        sqlSession.commit();
    }
    sqlSession.close();
}

maven资源过滤问题 

在pom.xml添加<!--在build中配置resources，来防止我们资源导出失败的问题-->

<build>

      <resources>

        <resource>

          <directory>src/main/resources</directory>

          <includes>

            <include>**/*.properties</include>

            <include>**/*.xml</include>

          </includes>

          <filtering>true</filtering>

        </resource>

        <resource>

          <directory>src/main/java</directory>

          <includes>

            <include>**/*.properties</include>

            <include>**/*.xml</include>

          </includes>

          <filtering>true</filtering>

        </resource>

      </resources>

</build>

properties

这些属性可以在外部进行配置，并可以进行动态替换。

<properties resource="jdbc.properties"/>

<property name="driver" value="${jdbc.driver}"/>

<property name="url" value="${jdbc.url}"/>

<property name="username" value="${jdbc.username}"/>

<property name="password" value="${jdbc.password}"/>