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  • 01_5_删除指定id的单个对象

    01_5_删除指定id的单个对象

    1. 配置相应的映射文件内容

     <delete id="deleteStudent" parameterClass="int">

       delete from student where sid=#sid#

      </delete>

    2. 实现类的方法

    public void deleteStudentById(int id) {

    try {

    sqlMapClient.delete("deleteStudent", id);

    } catch (SQLException e) {

    e.printStackTrace();

    }

    }

    3. 调试结果

    public static void main(String[] args) {

    IStudentDAO dao = new IStudentDAOImpl();

    for(Student stu : dao.queryAllStudent()) {

    System.out.println(stu);

    }

    //删除sid7的数据

    dao.deleteStudentById(7);

    System.out.println("#############");

    for(Student stu : dao.queryAllStudent()) {

    System.out.println(stu);

    }

    }

    [sid:7, name:fengge, major:null, birth:Tue Oct 05 00:00:00 CST 2010, score:110.0]

    [sid:1, name:李明, major:语文, birth:Tue Mar 27 00:00:00 CST 2018, score:100.0]

    [sid:2, name:可可, major:英语, birth:Mon Mar 12 00:00:00 CST 2018, score:120.0]

    [sid:3, name:天天, major:数学, birth:Thu Mar 22 00:00:00 CST 2018, score:80.0]

    #############

    [sid:1, name:李明, major:语文, birth:Tue Mar 27 00:00:00 CST 2018, score:100.0]

    [sid:2, name:可可, major:英语, birth:Mon Mar 12 00:00:00 CST 2018, score:120.0]

    [sid:3, name:天天, major:数学, birth:Thu Mar 22 00:00:00 CST 2018, score:80.0]

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  • 原文地址:https://www.cnblogs.com/flyback/p/8661527.html
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