1.2 相关模块及代码-Java必知必会-Maven高级

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1.2.1 maven-ssm

- pom.xml

<groupId>com.xudaxian</groupId>
    <artifactId>maven-ssm</artifactId>
    <version>1.0</version>
    
    <packaging>pom</packaging>

<modules>
        
        <module>maven-ssm-pojo</module>
        <module>maven-ssm-dao</module>
        <module>maven-ssm-service</module>
        <module>maven-ssm-web</module>
    </modules>

<dependencyManagement>
        
        <dependencies>
            
            <dependency>
                <groupId>com.xudaxian</groupId>
                <artifactId>maven-ssm-service</artifactId>
                <version>1.0</version>
            </dependency>
            <dependency>
                <groupId>com.xudaxian</groupId>
                <artifactId>maven-ssm-pojo</artifactId>
                <version>1.0</version>
            </dependency>
            <dependency>
                <groupId>com.xudaxian</groupId>
                <artifactId>maven-ssm-dao</artifactId>
                <version>1.0</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>5.1.9.RELEASE</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>5.1.9.RELEASE</version>
            </dependency>
            
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>3.5.3</version>
            </dependency>
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>8.0.25</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>5.1.9.RELEASE</version>
            </dependency>
            
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>2.0.3</version>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.16</version>
            </dependency>
            
            <dependency>
                <groupId>com.github.pagehelper</groupId>
                <artifactId>pagehelper</artifactId>
                <version>5.1.2</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>5.1.9.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.9.0</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

<dependencies>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
        </dependency>
        
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
        </dependency>
        
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
        
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
    </dependencies>

<build>
        <pluginManagement>
            <plugins>
                
                <plugin>
                    <groupId>org.apache.tomcat.maven</groupId>
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <version>2.1</version>
                    <configuration>
                        <port>80</port>
                        <path>/</path>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

</project>
```

1.2.2 maven-ssm-pojo

- 目录结构：

![](/uploads/images/20230727/a1c2c26b68cf6adb645f0484aa7d2d2a.png)

- pom.xml

<artifactId>maven-ssm-pojo</artifactId>

</project>
```

- com.xudaxian.domain.User.java

```
package com.xudaxian.domain;

import java.io.Serializable;
import java.util.Date;

/**
 * User
 *
 * @author maxiaoke.com
 * @version 1.0
 * @since 2021 -06-14 07:25
 */
public class User implements Serializable {

private String uuid;

private String username;

private String password;

private String realName;

private Integer gender;

private Date birthday;

public String getUuid() {
        return uuid;
    }

public void setUuid(String uuid) {
        this.uuid = uuid;
    }

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;
    }

public String getRealName() {
        return realName;
    }

public void setRealName(String realName) {
        this.realName = realName;
    }

public Integer getGender() {
        return gender;
    }

public void setGender(Integer gender) {
        this.gender = gender;
    }

public Date getBirthday() {
        return birthday;
    }

public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

@Override
    public String toString() {
        return "User{" +
                "uuid='" + uuid + '\'' +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", realName='" + realName + '\'' +
                ", gender=" + gender +
                ", birthday=" + birthday +
                '}';
    }
}
```
1.2.3 maven-ssm-dao

- 目录结构：

![](/uploads/images/20230727/9af6809cbf4d660e2aa76dd2c581bc56.png)

- pom.xml

<artifactId>maven-ssm-dao</artifactId>

<dependencies>
        
        <dependency>
            <groupId>com.xudaxian</groupId>
            <artifactId>maven-ssm-pojo</artifactId>
        </dependency>
        
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>
```
- com.xudaxian.mapper.UserMapper.java

```
package com.xudaxian.mapper;

import com.xudaxian.domain.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;

import java.util.List;

/**
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
@Mapper
public interface UserMapper {

/**
     * 添加用户信息
     *
     * @param user 用户信息对象
     * @return 如果新增成功，则返回true；否则，返回false
     */
    boolean save( User user);

/**
     * 修改用户信息
     *
     * @param user 用户信息对象
     * @return 如果修改成功，则返回true；否则，返回false
     */
    boolean update( User user);

/**
     * 删除用户信息
     *
     * @param uuid 主键
     * @return 如果删除成功，则返回true；否则，返回false
     */
    boolean delete(String uuid);

/**
     * 根据主键查询用户信息
     *
     * @param uuid 主键
     * @return 用户信息
     */
    User get(String uuid);

/**
     * 查询全部用户信息
     *
     * @return 全部用户信息
     */
    List<User> getAll();

/**
     * 根据用户名和密码查询用户信息
     *
     * @param username 用户名
     * @param password 密码
     * @return 用户信息
     */
    User getByUsernameAndPassword(@Param("username") String username, @Param("password") String password);

}
```
- com/xudaxian/mapper/UserMapper.xml

```
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.xudaxian.mapper.UserMapper">
    <insert id="save">
        INSERT INTO `user` (uuid, username, password, realName, gender, birthday)
        VALUES (#{uuid}, #{username}, #{password}, #{realName}, #{gender}, #{birthday})
    </insert>
    <update id="update">
        UPDATE `user`
        SET username=#{username},
            password=#{password},
            realName=#{realName},
            gender=#{gender},
            birthday=#{birthday}
        WHERE uuid = #{uuid}
    </update>
    <delete id="delete">
        DELETE
        FROM `user`
        WHERE uuid = #{uuid}
    </delete>
    <select id="get" resultType="com.xudaxian.domain.User">
        SELECT *
        FROM `user`
        WHERE uuid = #{uuid}
    </select>
    <select id="getAll" resultType="com.xudaxian.domain.User">
        SELECT *
        FROM `user`
    </select>
    <select id="getByUsernameAndPassword" resultType="com.xudaxian.domain.User">
        SELECT *
        FROM `user`
        WHERE username = #{username}
          AND password = #{password}
    </select>
</mapper>
```
- jdbc.properties

```
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/maven?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&serverTimezone=GMT%2B8&allowPublicKeyRetrieval=true&nullCatalogMeansCurrent=true
jdbc.username=root
jdbc.password=123456
```
- applicationContext-dao.xml

```
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<context:component-scan base-package="com.xudaxian">
        <context:exclude-filter type="annotation" expression="org.springframework.web.bind.annotation.RestController"/>
    </context:component-scan>

<context:property-placeholder location="classpath*:jdbc.properties"/>

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

<bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="typeAliasesPackage" value="com.xudaxian.mapper"/>
        
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <props>
                            <prop key="helperDialect">mysql</prop>
                            <prop key="reasonable">true</prop>
                        </props>
                    </property>
                </bean>
            </array>
        </property>
    </bean>

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.xudaxian.mapper"/>
    </bean>

</beans>
```
1.2.4 maven-ssm-service

- 目录结构：

![](/uploads/images/20230727/600beca05c32ae2fb3e500be7c60dd84.png)

- pom.xml

<artifactId>maven-ssm-service</artifactId>

<dependencies>
        <dependency>
            <groupId>com.xudaxian</groupId>
            <artifactId>maven-ssm-dao</artifactId>
        </dependency>
        
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>
```
- com.xudaxian.service.UserService.java

```
package com.xudaxian.service;

import com.github.pagehelper.PageInfo;
import com.xudaxian.domain.User;

/**
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public interface UserService {

/**
     * 保存用户信息
     *
     * @param user 用户信息
     * @return
     */
    boolean save(User user);

/**
     * 更新用户信息
     *
     * @param user 用户信息
     * @return
     */
    boolean update(User user);

/**
     * 删除用户信息
     *
     * @param uuid 主键
     * @return
     */
    boolean delete(String uuid);

/**
     * 根据主键获取用户信息
     *
     * @param uuid 主键
     * @return
     */
    User get(String uuid);

/**
     * 分页显示用户信息
     *
     * @param page 页码
     * @param size 每页显示条数
     * @return
     */
    PageInfo<User> getAll(int page, int size);

/**
     * 根据用户名和密码登录
     *
     * @param userName
     * @param password
     * @return
     */
    User login(String userName, String password);
}
```
- com.xudaxian.service.impl.UserServiceImpl.java

```
package com.xudaxian.service.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.xudaxian.domain.User;
import com.xudaxian.mapper.UserMapper;
import com.xudaxian.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
@Transactional
@Service
public class UserServiceImpl implements UserService {

@Autowired
    private UserMapper userMapper;

@Override
    public boolean save(User user) {
        return userMapper.save(user);
    }

@Override
    public boolean update(User user) {
        return userMapper.update(user);
    }

@Override
    public boolean delete(String uuid) {
        return userMapper.delete(uuid);
    }

@Override
    public User get(String uuid) {
        return userMapper.get(uuid);
    }

@Override
    public PageInfo<User> getAll(int page, int size) {
        PageHelper.startPage(page, size);
        List<User> userList = userMapper.getAll();
        return new PageInfo<>(userList);
    }

@Override
    public User login(String userName, String password) {
        return userMapper.getByUsernameAndPassword(userName, password);
    }
}
```
- applicationContext-service.xml

```
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

<import resource="classpath*:applicationContext-dao.xml"/>

<tx:annotation-driven transaction-manager="txManager"/>

<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

</beans>
```
1.2.5 maven-ssm-web

- 目录结构：

![](/uploads/images/20230727/0e04ea40592ff3a568a6f8fb23262889.png)

- pom.xml

```
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    
    <parent>
        <artifactId>maven-ssm</artifactId>
        <groupId>com.xudaxian</groupId>
        <version>1.0</version>
        
        <relativePath>../pom.xml</relativePath>
    </parent>
    <modelVersion>4.0.0</modelVersion>

<artifactId>maven-ssm-web</artifactId>
    <packaging>war</packaging>

<dependencies>
        <dependency>
            <groupId>com.xudaxian</groupId>
            <artifactId>maven-ssm-service</artifactId>
        </dependency>
    </dependencies>

<build>
        
        <plugins>
            
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>
```
- com.xudaxian.utils.Code.java

```
package com.xudaxian.utils;

import java.io.Serializable;

/**
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public class Code implements Serializable {
    //    操作结果编码
    public static final Integer SAVE_OK = 20011;
    public static final Integer UPDATE_OK = 20021;
    public static final Integer DELETE_OK = 20031;
    public static final Integer GET_OK = 20041;

public static final Integer SAVE_ERROR = 20010;
    public static final Integer UPDATE_ERROR = 20020;
    public static final Integer DELETE_ERROR = 20030;
    public static final Integer GET_ERROR = 20040;

//    系统错误编码

//    操作权限编码

//    校验结果编码

}
```
- com.xudaxian.utils.Result.java

```
package com.xudaxian.utils;

import java.io.Serializable;

/**
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
public class Result implements Serializable {
    //    操作结果编码
    private Integer code;
    //    操作数据结果
    private Object data;
    //    消息
    private String message;

public Result(Integer code) {
        this.code = code;
    }

public Result(Integer code, Object data) {
        this.code = code;
        this.data = data;
    }

public Integer getCode() {
        return code;
    }

public void setCode(Integer code) {
        this.code = code;
    }

public Object getData() {
        return data;
    }

public void setData(Object data) {
        this.data = data;
    }

public String getMessage() {
        return message;
    }

public void setMessage(String message) {
        this.message = message;
    }

@Override
    public String toString() {
        return "Result{" +
                "code=" + code +
                ", data=" + data +
                ", message='" + message + '\'' +
                '}';
    }
}
```
- com.xudaxian.web.UserController.java

```
package com.xudaxian.web;

import com.github.pagehelper.PageInfo;
import com.xudaxian.domain.User;
import com.xudaxian.service.UserService;
import com.xudaxian.utils.Code;
import com.xudaxian.utils.Result;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

/**
 * @author maxiaoke.com
 * @version 1.0
 * 
 */
@RestController
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;

@PostMapping
    public Result save(User user) {
        boolean flag = userService.save(user);
        return new Result(flag ? Code.SAVE_OK : Code.SAVE_ERROR);
    }

@PutMapping
    public Result update(User user) {
        boolean flag = userService.update(user);
        return new Result(flag ? Code.UPDATE_OK : Code.UPDATE_ERROR);
    }

@DeleteMapping("/{uuid}")
    public Result delete(@PathVariable String uuid) {
        boolean flag = userService.delete(uuid);
        return new Result(flag ? Code.DELETE_OK : Code.DELETE_ERROR);
    }

@GetMapping("/{uuid}")
    public Result get(@PathVariable String uuid) {
        User user = userService.get(uuid);
        return new Result(null != user ? Code.GET_OK : Code.GET_ERROR, user);
    }

@GetMapping("/{page}/{size}")
    public Result getAll(@PathVariable Integer page, @PathVariable Integer size) {
        PageInfo<User> all = userService.getAll(page, size);
        return new Result(null != all ? Code.GET_OK : Code.GET_ERROR, all);
    }

@PostMapping("/login")
    public Result login(String userName, String password) {
        User user = userService.login(userName, password);
        return new Result(null != user ? Code.GET_OK : Code.GET_ERROR, user);
    }

}
```
- applicationContext.xml

```
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

<context:component-scan base-package="com.xudaxian">
        <context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.RestController"/>
    </context:component-scan>

</beans>
```
- spring-mvc.xml

```
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<mvc:annotation-driven/>

<context:component-scan base-package="com.xudaxian.web">
        <context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.RestController"/>
    </context:component-scan>

</beans>
```
- webapp/WEB-INF/web.xml

```
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
         http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

<context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:applicationContext.xml</param-value>
    </context-param>

<listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

<filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

<servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath*:spring-mvc.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>
```

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