springmvc+mybatisplus
时间: 2024-02-03 15:10:34 浏览: 36
Spring MVC是基于Spring框架的一种Web开发框架,而MyBatis Plus是MyBatis的增强工具库。它们可以结合使用来进行Java Web应用的开发。
Spring MVC是一个基于MVC(Model-View-Controller)设计模式的框架,它提供了一种结构化的方式来组织和管理Web应用程序。它通过将应用程序分为模型、视图和控制器三个部分来实现解耦和可维护性。模型负责处理数据逻辑,视图负责展示数据,控制器负责处理用户请求和调度逻辑。
MyBatis Plus是MyBatis的增强工具库,它简化了MyBatis的使用,并提供了一些额外的功能。MyBatis是一个优秀的持久层框架,它通过XML或注解的方式将Java对象映射到数据库中的表。MyBatis Plus在此基础上提供了更加便捷的CRUD操作、分页查询、代码生成等功能,大大提高了开发效率。
结合使用Spring MVC和MyBatis Plus可以实现一个完整的Java Web应用。Spring MVC负责接收用户请求并调度控制器处理逻辑,控制器通过调用Service层处理业务逻辑,Service层再调用MyBatis Plus进行数据库操作。最后,将处理结果返回给用户。
总结一下,Spring MVC是一个Web开发框架,MyBatis Plus是MyBatis的增强工具库,它们可以结合使用来进行Java Web应用的开发,提高开发效率和可维护性。
相关问题
springmvc+mybatisplus示例代码
Spring MVC是一种基于Java的Web开发框架,而MyBatis Plus是一个基于MyBatis的增强工具库。结合使用Spring MVC和MyBatis Plus可以快速开发高效的Web应用程序。
下面是一个简单的Spring MVC和MyBatis Plus的示例代码:
1. 创建Maven项目并添加依赖:
```xml
<dependencies>
<!-- Spring MVC -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.10</version>
</dependency>
<!-- MyBatis Plus -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.4.3.1</version>
</dependency>
<!-- 数据库驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.26</version>
</dependency>
</dependencies>
```
2. 创建数据库表和实体类:
```sql
CREATE TABLE user (
id INT PRIMARY KEY AUTO_INCREMENT,
username VARCHAR(50) NOT NULL,
password VARCHAR(50) NOT NULL
);
```
```java
public class User {
private Integer id;
private String username;
private String password;
// 省略getter和setter方法
}
```
3. 创建Mapper接口和XML文件:
```java
@Mapper
public interface UserMapper extends BaseMapper<User> {
}
```
```xml
<!-- resources/mapper/UserMapper.xml -->
<mapper namespace="com.example.mapper.UserMapper">
<resultMap id="BaseResultMap" type="com.example.entity.User">
<id column="id" property="id" />
<result column="username" property="username" />
<result column="password" property="password" />
</resultMap>
<select id="selectById" resultMap="BaseResultMap">
SELECT * FROM user WHERE id = #{id}
</select>
<insert id="insert" parameterType="com.example.entity.User">
INSERT INTO user (username, password) VALUES (#{username}, #{password})
</insert>
</mapper>
```
4. 创建Service和Controller:
```java
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
}
@RestController
@RequestMapping("/users")
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/{id}")
public User getUserById(@PathVariable Integer id) {
return userService.getById(id);
}
@PostMapping("/")
public boolean addUser(@RequestBody User user) {
return userService.save(user);
}
}
```
5. 配置Spring MVC和MyBatis Plus:
```java
@Configuration
@EnableWebMvc
@MapperScan("com.example.mapper")
public class AppConfig {
// 配置数据源和事务管理器
@Bean
public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {
SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dataSource);
return sessionFactory.getObject();
}
@Bean
public PlatformTransactionManager transactionManager(DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
}
}
```
以上示例代码演示了如何使用Spring MVC和MyBatis Plus进行简单的增删改查操作。你可以根据自己的需求进行扩展和修改。
使用springboot+mybatisplus+springmvc写一个禁用员工的代码
以下是使用Spring Boot、MyBatis Plus和Spring MVC编写的禁用员工代码示例:
1. 在pom.xml文件中添加以下依赖:
```
<dependencies>
<!-- Spring Boot -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- MyBatis Plus -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.4.3.1</version>
</dependency>
<!-- MySQL Connector -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.26</version>
</dependency>
</dependencies>
```
2. 创建Employee实体类:
```java
public class Employee {
private Long id;
private String name;
private String email;
private Integer age;
private Boolean enabled;
// 省略getter和setter方法
}
```
3. 创建EmployeeMapper接口:
```java
@Mapper
public interface EmployeeMapper extends BaseMapper<Employee> {
}
```
4. 创建EmployeeService类:
```java
@Service
public class EmployeeService {
@Autowired
private EmployeeMapper employeeMapper;
public Employee getEmployeeById(Long id) {
return employeeMapper.selectById(id);
}
public List<Employee> getAllEmployees() {
return employeeMapper.selectList(null);
}
public int saveEmployee(Employee employee) {
return employeeMapper.insert(employee);
}
public int updateEmployee(Employee employee) {
return employeeMapper.updateById(employee);
}
public int deleteEmployee(Long id) {
return employeeMapper.deleteById(id);
}
public int disableEmployee(Long id) {
Employee employee = employeeMapper.selectById(id);
employee.setEnabled(false);
return employeeMapper.updateById(employee);
}
}
```
5. 创建EmployeeController类:
```java
@RestController
@RequestMapping("/employees")
public class EmployeeController {
@Autowired
private EmployeeService employeeService;
@GetMapping("/{id}")
public Employee getEmployeeById(@PathVariable Long id) {
return employeeService.getEmployeeById(id);
}
@GetMapping
public List<Employee> getAllEmployees() {
return employeeService.getAllEmployees();
}
@PostMapping
public int saveEmployee(@RequestBody Employee employee) {
return employeeService.saveEmployee(employee);
}
@PutMapping("/{id}")
public int updateEmployee(@PathVariable Long id, @RequestBody Employee employee) {
employee.setId(id);
return employeeService.updateEmployee(employee);
}
@DeleteMapping("/{id}")
public int deleteEmployee(@PathVariable Long id) {
return employeeService.deleteEmployee(id);
}
@PutMapping("/{id}/disable")
public int disableEmployee(@PathVariable Long id) {
return employeeService.disableEmployee(id);
}
}
```
6. 在application.properties文件中配置数据库连接信息:
```
spring.datasource.url=jdbc:mysql://localhost:3306/test?serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
```
以上代码示例中,我们通过创建Employee实体类、EmployeeMapper接口、EmployeeService类和EmployeeController类,实现了禁用员工的功能。在EmployeeService类中,我们新增了disableEmployee()方法,用于禁用指定id的员工。在EmployeeController类中,我们新增了disableEmployee()接口,用于接收请求并调用disableEmployee()方法实现禁用员工的功能。
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