Java框架技术：Spring和JDBCTemplate+Spring和MyBatis

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Java框架技术：Spring和JDBCTemplate+Spring和MyBatis

2024-07-11 04:53| 来源: 网络整理| 查看: 265

实验目的、内容及要求：

实验目的：

掌握Spring和JDBCTemplate操作数据库掌握Spring和MyBatis操作数据库

实验内容：

1.在计算机上实现模拟查询学生成绩的操作，要求如下：

（1）构建User类和Student类，对应数据库中的两个表，类属性如下:

A.Student类，属性（sid，sname，sex，age，suid）

B.User，属性（uid，username，password）

（2）假设User类所对应的方法是login(username,password)，完成该类中的这个方法在dao层的接口和实现类，以及service层的接口和实现类

（3）假设Student类所对应的方法是查询所有学生信息(List findStudent())以及根据id查询学生信息(Student findStudentById(int id))以及根据名字模糊查找学生信息(List findStudentByName(String name))这三个方法，完成这三个方法在dao和service层的构建以及调用关系，注意，这里所有的查询只能查询到跟当前登录成功的User对应的数据；

（4）提供main方法测试，使用Scanner类来完成控制台的输入指令：1.用户登录 2.退出，当用户登录成功之后，开始有新指令：1.查找所有学生、2.根据id查找学生、3.根据学生姓名查找学生；完成以上5个功能；

2.操作完成之后，把代码以及效果截图粘贴到该文档中进行提交

实验仪器设备（实验环境）：

运行环境：Windows 10

开发工具：IntelliJ IDEA

运行环境：Java 21

实验过程（包括实现思路、实验步骤/实现代码、实验结果/运行图）：

在计算机上实现学生成绩管理系统，要求如下:首先先构建文件目录 Spring_jdbc

然后导入项目依赖在pom.xml 而且Java版本为21

4.0.0 org.example Spring_jdbc 1.0-SNAPSHOT 21 21 UTF-8 org.springframework spring-core 5.3.1 org.springframework spring-beans 5.3.1 org.springframework spring-aop 5.3.1 org.springframework spring-context 5.3.1 org.springframework spring-expression 5.3.1 org.springframework spring-jdbc 5.3.1 org.springframework spring-tx 5.3.1 mysql mysql-connector-java 8.0.23 commons-logging commons-logging 1.2

接着构建实体类

User 类

package com.Spring.Pojo; public class User { private long uid; private String username; private String password; public long getUid() { return uid; } public void setUid(long uid) { this.uid = uid; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } @Override public String toString() { return "User{" + "uid=" + uid + ", username='" + username + '\'' + ", password='" + password + '\'' + '}'; } }

Student 类

package com.Spring.Pojo; public class Student { private long sid; private String sname; private String sex; private long age; private long suid; public long getSid() { return sid; } public void setSid(long sid) { this.sid = sid; } public String getSname() { return sname; } public void setSname(String sname) { this.sname = sname; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public long getAge() { return age; } public void setAge(long age) { this.age = age; } public long getSuid() { return suid; } public void setSuid(long suid) { this.suid = suid; } @Override public String toString() { return "Student{" + "sid=" + sid + ", sname='" + sname + '\'' + ", sex='" + sex + '\'' + ", age=" + age + ", suid=" + suid + '}'; } }

Dao 层：

UserDao接口（这里只是实现了登录方法仅用于测试学习JDBCTemplate的用法）

package com.Spring.Dao; import com.Spring.Pojo.User; import java.util.List; public interface UserDao { void login(String userName, String password); }

UserDaoImpl 类

package com.Spring.Dao; import com.Spring.Pojo.User; import com.Spring.Util; import org.springframework.jdbc.core.BeanPropertyRowMapper; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.core.RowMapper; import java.util.List; public class UserDaoImpl implements UserDao { static JdbcTemplate jdbcTemplate = Util.getjdbcTemplate(); @Override public void login(String userName, String password) { System.out.println("用户名：" + userName + "密码：" + password); String sql = "select * from user where username=? and password=?"; RowMapper rowMapper = new BeanPropertyRowMapper(User.class); try { User user = jdbcTemplate.queryForObject(sql, rowMapper, userName, password); if (user != null) { System.out.println("登录成功"); } } catch (Exception e) { System.out.println("登录失败"); } } }

StudentDao 类

package com.Spring.Dao; import com.Spring.Pojo.Student; import java.util.List; import java.util.Map; public interface StudentDao { public List findStudent(); public List findStudentById(int id); public List findStudentByName(String name); }

StudentDaoImpl 类

package com.Spring.Dao; import com.Spring.Pojo.Student; import com.Spring.Util; import org.springframework.jdbc.core.BeanPropertyRowMapper; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.core.RowMapper; import java.util.List; public class StudentDaoImpl implements StudentDao { static Student student = new Student(); static JdbcTemplate jdbcTemplate = Util.getjdbcTemplate(); @Override public List findStudent() { String sql = "select * from student"; RowMapper rowMapper = new BeanPropertyRowMapper(Student.class); return jdbcTemplate.query(sql, rowMapper); } @Override public List findStudentById(int id) { String sql = "select s.* from student s ,user u where s.suid = u.uid and uid=?"; RowMapper rowMapper = new BeanPropertyRowMapper(Student.class); return jdbcTemplate.query(sql, rowMapper, id); } @Override public List findStudentByName(String name) { String sql = "select * from student where sname like concat('%',?,'%')"; RowMapper rowMapper = new BeanPropertyRowMapper(Student.class); return jdbcTemplate.query(sql, rowMapper, name); } }

Service层：

StudentService：

package com.Spring.Service; import com.Spring.Pojo.Student; import java.util.List; /** * Created with IntelliJ IDEA. * * @Author: kevin * @Date: 2024/04/24/14:19 * @Description: */ public interface StudentService { public List findStudent(); public List findStudentById(); public List findStudentByName(); }

StudentServiceImpl：（注意这里的id是通过管理员的id对应查找学生的信息）

package com.Spring.Service; import com.Spring.Dao.StudentDao; import com.Spring.Dao.StudentDaoImpl; import com.Spring.Pojo.Student; import java.util.ArrayList; import java.util.List; import java.util.Scanner; /** * Created with IntelliJ IDEA. *

* @Author: kevin * @Date: 2024/04/24/14:18 * @Description: */ public class StudentServiceImpl implements StudentService { List students = new ArrayList(); static Scanner scanner = new Scanner(System.in); static StudentDao studentDao = new StudentDaoImpl(); @Override public List findStudent() { students = studentDao.findStudent(); for (Student student : students) { System.out.println(student); } return null; } @Override public List findStudentById() { int id = 0; System.out.println("请输入管理员id"); id = scanner.nextInt(); students = studentDao.findStudentById(id); for (Student student : students) { System.out.println(student); } return null; } @Override public List findStudentByName() { String name = null; System.out.println("请输入学生姓名（模糊查找）"); name = scanner.next(); students = studentDao.findStudentByName(name); for (Student student : students) { System.out.println(student); } return null; } }

UserService 接口：

package com.Spring.Service; /** * Created with IntelliJ IDEA. * * @Author: kevin * @Date: 2024/04/24/14:17 * @Description: */ public interface UserService { void login(); }

UserServiceImpl 类

package com.Spring.Service; import com.Spring.Dao.UserDao; import com.Spring.Dao.UserDaoImpl; import java.util.Scanner; /** * Created with IntelliJ IDEA. * * @Author: kevin * @Date: 2024/04/24/14:18 * @Description: */ public class UserServiceImpl implements UserService{ static Scanner scanner = new Scanner(System.in); static UserDao userDao = new UserDaoImpl(); @Override public void login() { String userName = null; String password = null; System.out.println("请输入用户名"); userName = scanner.next(); System.out.println("请输入密码"); password = scanner.next(); userDao.login(userName,password); } }

另外一个Util 类：（这是用来接收 jdbcTemplate 方法的）

package com.Spring; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.jdbc.core.JdbcTemplate; public class Util { private static JdbcTemplate jdbcTemplate =null; static { ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); jdbcTemplate = (JdbcTemplate) context.getBean("jdbcTemplate"); } public static JdbcTemplate getjdbcTemplate(){ return jdbcTemplate; } }

最后一个配置文件 ApplicationContext.xml（数据库的配置信息也在这里）

最后用了main 类的主函数来测试

main：

package com.Spring; import com.Spring.Service.StudentService; import com.Spring.Service.StudentServiceImpl; import com.Spring.Service.UserService; import com.Spring.Service.UserServiceImpl; import com.sun.source.tree.ContinueTree; import com.sun.tools.javac.Main; import java.util.Scanner; /** * Created with IntelliJ IDEA. * * @Author: kevin * @Date: 2024/04/24/14:15 * @Description: */ public class main { static Scanner scanner = new Scanner(System.in); static StudentService studentService = new StudentServiceImpl(); static UserService userService = new UserServiceImpl(); public static void main(String[] args) { System.out.println("请输入操作：1.学生管理系统,2.管理员管理系统"); int a; try { a = scanner.nextInt(); if (a == 1) { while (true) { System.out.println("请输入操作：1.查询所有学生信息 2.根据管理员id查询学生信息 3.根据名字模糊查找学生信息 4.退出"); int i = scanner.nextInt(); switch (i) { case 1: studentService.findStudent(); break; case 2: studentService.findStudentById(); break; case 3: studentService.findStudentByName(); break; case 4: System.exit(0); } } } if (a == 2) { while (true) { System.out.println("请输入操作：1.登录 2.退出"); int i = scanner.nextInt(); switch (i) { case 1: userService.login(); break; case 2: System.exit(0); break; default: System.out.println("输入有误"); } } } } catch (Exception e) { System.out.println("输入有误"); } } }

我的数据库是 MySQL 5.7版本数据库名字为spring

创建两个数据库表（student，user）