mybits学习2

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}"/>