JavaWeb - Day11 - 案例 - 员工管理、文件上传、修改员工、配置文件

请求路径：/emps

请求方式：POST

接口描述：该接口用于添加员工的信息

{
  "image": "https://web-framework.oss-cn-hangzhou.aliyuncs.com/2022-09-03-07-37-38222.jpg",
  "username": "linpingzhi",
  "name": "林平之",
  "gender": 1,
  "job": 1,
  "entrydate": "2022-09-18",
  "deptId": 1
}

{
    "code":1,
    "msg":"success",
    "data":null
}

@Slf4j
@RestController
@RequestMapping("/emps")
public class EmpController {

    @Autowired
    private EmpService empService;

    //新增
    @PostMapping
    public Result save(@RequestBody Emp emp){
        //记录日志
        log.info("新增员工, emp:{}",emp);
        //调用业务层新增功能
        empService.save(emp);
        //响应
        return Result.success();
    }

    //省略...
}

public interface EmpService {

    /**
     * 保存员工信息
     * @param emp
     */
    void save(Emp emp);
    
    //省略...
}

@Slf4j
@Service
public class EmpServiceImpl implements EmpService {
    @Autowired
    private EmpMapper empMapper;

    @Override
    public void save(Emp emp) {
        //补全数据
        emp.setCreateTime(LocalDateTime.now());
        emp.setUpdateTime(LocalDateTime.now());
        //调用添加方法
        empMapper.insert(emp);
    }

    //省略...
}

@Mapper
public interface EmpMapper {
    //新增员工
    @Insert("insert into emp (username, name, gender, image, job, entrydate, dept_id, create_time, update_time) " +
            "values (#{username}, #{name}, #{gender}, #{image}, #{job}, #{entrydate}, #{deptId}, #{createTime}, #{updateTime});")
    void insert(Emp emp);

    //省略...
}

<form action="/upload" method="post" enctype="multipart/form-data">
    姓名: <input type="text" name="username"><br>
    年龄: <input type="text" name="age"><br>
    头像: <input type="file" name="image"><br>
    <input type="submit" value="提交">
</form>

<input type="file" name="image"/>

 <form action="/upload" method="post" enctype="multipart/form-data">
        姓名: <input type="text" name="username"><br>
        年龄: <input type="text" name="age"><br>
        头像: <input type="file" name="image"><br>
        <input type="submit" value="提交">
    </form>

@Slf4j
@RestController
public class UploadController {

    @PostMapping("/upload")
    public Result upload(String username, Integer age, MultipartFile image)  {
        log.info("文件上传：{},{},{}",username,age,image);
        return Result.success();
    }

}

@Slf4j
@RestController
public class UploadController {

    @PostMapping("/upload")
    public Result upload(String username, Integer age, MultipartFile image) throws IOException {
        log.info("文件上传：{},{},{}",username,age,image);

        //获取原始文件名
        String originalFilename = image.getOriginalFilename();

        //将文件存储在服务器的磁盘目录
        image.transferTo(new File("E:/images/"+originalFilename));

        return Result.success();
    }

}

@Slf4j
@RestController
public class UploadController {

    @PostMapping("/upload")
    public Result upload(String username, Integer age, MultipartFile image) throws IOException {
        log.info("文件上传：{},{},{}",username,age,image);

        //获取原始文件名
        String originalFilename = image.getOriginalFilename();

        //构建新的文件名
        String extname = originalFilename.substring(originalFilename.lastIndexOf("."));//文件扩展名
        String newFileName = UUID.randomUUID().toString()+extname;//随机名+文件扩展名

        //将文件存储在服务器的磁盘目录
        image.transferTo(new File("E:/images/"+newFileName));

        return Result.success();
    }

}

#配置单个文件最大上传大小
spring.servlet.multipart.max-file-size=10MB

#配置单个请求最大上传大小(一次请求可以上传多个文件)
spring.servlet.multipart.max-request-size=100MB

package com.ctgu;

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.PutObjectRequest;
import com.aliyun.oss.model.PutObjectResult;
import java.io.File;

public class Demo {

    public static void main(String[] args) throws Exception {
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "https://oss-cn-beijing.aliyuncs.com";
        // 从环境变量中获取访问凭证。运行本代码示例之前，请确保已设置环境变量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "web-framework01-cs";
        // 填写Object完整路径，完整路径中不能包含Bucket名称，例如exampledir/exampleobject.txt。
        String objectName = "1.jpg";
        // 填写本地文件的完整路径，例如D:\\localpath\\examplefile.txt。
        // 如果未指定本地路径，则默认从示例程序所属项目对应本地路径中上传文件。
        String filePath= "C:\\Users\\admin\\Pictures\\Saved Pictures\\1.jpg";

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);

        try {
            // 创建PutObjectRequest对象。
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, objectName, new File(filePath));
            // 如果需要上传时设置存储类型和访问权限，请参考以下示例代码。
            // ObjectMetadata metadata = new ObjectMetadata();
            // metadata.setHeader(OSSHeaders.OSS_STORAGE_CLASS, StorageClass.Standard.toString());
            // metadata.setObjectAcl(CannedAccessControlList.Private);
            // putObjectRequest.setMetadata(metadata);

            // 上传文件。
            PutObjectResult result = ossClient.putObject(putObjectRequest);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

{
    "code": 1,
    "msg": "success",
    "data": "https://web-framework.oss-cn-hangzhou.aliyuncs.com/2022-09-02-00-27-0400.jpg"
}

package com.ctgu.utils;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.auth.CredentialsProviderFactory;
import com.aliyun.oss.common.auth.EnvironmentVariableCredentialsProvider;
import com.aliyuncs.exceptions.ClientException;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import java.io.*;
import java.util.UUID;

/**
 * 阿里云 OSS 工具类
 */
@Component
public class AliOSSUtils {

    private String endpoint = "https://oss-cn-beijing.aliyuncs.com";
    private String bucketName = "web-framework01-cs";

    /**
     * 实现上传图片到OSS
     */
    public String upload(MultipartFile file) throws IOException, ClientException {
        // 获取上传的文件的输入流
        InputStream inputStream = file.getInputStream();

        // 避免文件覆盖
        String originalFilename = file.getOriginalFilename();
        String fileName = UUID.randomUUID().toString() + originalFilename.substring(originalFilename.lastIndexOf("."));
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();

        //上传文件到 OSS
        OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);
        ossClient.putObject(bucketName, fileName, inputStream);

        //文件访问路径
        String url = endpoint.split("//")[0] + "//" + bucketName + "." + endpoint.split("//")[1] + "/" + fileName;
        // 关闭ossClient
        ossClient.shutdown();
        return url;// 把上传到oss的路径返回
    }

}

import com.itheima.pojo.Result;
import com.itheima.utils.AliOSSUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;

@Slf4j
@RestController
public class UploadController {

    @Autowired
    private AliOSSUtils aliOSSUtils;

    @PostMapping("/upload")
    public Result upload(MultipartFile image) throws IOException {
        //调用阿里云OSS工具类，将上传上来的文件存入阿里云
        String url = aliOSSUtils.upload(image);
        //将图片上传完成后的url返回，用于浏览器回显展示
        return Result.success(url);
    }
    
}

{
  "code": 1,
  "msg": "success",
  "data": {
    "id": 2,
    "username": "zhangwuji",
    "password": "123456",
    "name": "张无忌",
    "gender": 1,
    "image": "https://web-framework.oss-cn-hangzhou.aliyuncs.com/2022-09-02-00-27-53B.jpg",
    "job": 2,
    "entrydate": "2015-01-01",
    "deptId": 2,
    "createTime": "2022-09-01T23:06:30",
    "updateTime": "2022-09-02T00:29:04"
  }
}

@Mapper
public interface EmpMapper {

    //根据ID查询员工信息
    @Select("select id, username, password, name, gender, image, job, entrydate, dept_id, create_time, update_time " +
            "from emp " +
            "where id = #{id}")
    public Emp findById(Integer id);

    
    //省略...
}

public interface EmpService {

    /**
     * 根据ID查询员工
     * @param id
     * @return
     */
    public Emp getById(Integer id);
    
    //省略...
}

@Slf4j
@Service
public class EmpServiceImpl implements EmpService {
    @Autowired
    private EmpMapper empMapper;

    @Override
    public Emp getById(Integer id) {
        return empMapper.findById(id);
    }
    
    //省略...
}

@Slf4j
@RestController
@RequestMapping("/emps")
public class EmpController {

    @Autowired
    private EmpService empService;

    //根据id查询
    @GetMapping("/{id}")
    public Result getById(@PathVariable Integer id){
        Emp emp = empService.getById(id);
        return Result.success(emp);
    }
    
    //省略...
}

{
  "id": 1,
  "image": "https://web-framework.oss-cn-hangzhou.aliyuncs.com/2022-09-03-07-37-38222.jpg",
  "username": "linpingzhi",
  "name": "林平之",
  "gender": 1,
  "job": 1,
  "entrydate": "2022-09-18",
  "deptId": 1
}

{
    "code":1,
    "msg":"success",
    "data":null
}

@Mapper
public interface EmpMapper {
    //修改员工信息
    public void update(Emp emp);
    
    //省略...
}

<?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.itheima.mapper.EmpMapper">

    <!--更新员工信息-->
    <update id="update">
        update emp
        <set>
            <if test="username != null and username != ''">
                username = #{username},
            </if>
            <if test="password != null and password != ''">
                password = #{password},
            </if>
            <if test="name != null and name != ''">
                name = #{name},
            </if>
            <if test="gender != null">
                gender = #{gender},
            </if>
            <if test="image != null and image != ''">
                image = #{image},
            </if>
            <if test="job != null">
                job = #{job},
            </if>
            <if test="entrydate != null">
                entrydate = #{entrydate},
            </if>
            <if test="deptId != null">
                dept_id = #{deptId},
            </if>
            <if test="updateTime != null">
                update_time = #{updateTime}
            </if>
        </set>
        where id = #{id}
    </update>

    <!-- 省略... -->
   
</mapper>

public interface EmpService {
    /**
     * 更新员工
     * @param emp
     */
    public void update(Emp emp);
   
    //省略...
}

@Slf4j
@Service
public class EmpServiceImpl implements EmpService {
    @Autowired
    private EmpMapper empMapper;

    @Override
    public void update(Emp emp) {
        emp.setUpdateTime(LocalDateTime.now()); //更新修改时间为当前时间
        
        empMapper.update(emp);
    }
    
    //省略...
}

@Slf4j
@RestController
@RequestMapping("/emps")
public class EmpController {

    @Autowired
    private EmpService empService;

    //修改员工
    @PutMapping
    public Result update(@RequestBody Emp emp){
        empService.update(emp);
        return Result.success();
    }
    
    //省略...
}

#自定义的阿里云OSS配置信息
aliyun.oss.endpoint=https://oss-cn-hangzhou.aliyuncs.com
aliyun.oss.accessKeyId=LTAI4GCH1vX6DKqJWxd6nEuW
aliyun.oss.accessKeySecret=yBshYweHOpqDuhCArrVHwIiBKpyqSL
aliyun.oss.bucketName=web-tlias

@Component
public class AliOSSUtils {
    /*以下4个参数没有指定值（默认值：null）*/
    private String endpoint;
    private String accessKeyId;
    private String accessKeySecret;
    private String bucketName;

    //省略其他代码...
}

@Component
public class AliOSSUtils {

    @Value("${aliyun.oss.endpoint}")
    private String endpoint;
    
    @Value("${aliyun.oss.accessKeyId}")
    private String accessKeyId;
    
    @Value("${aliyun.oss.accessKeySecret}")
    private String accessKeySecret;
    
    @Value("${aliyun.oss.bucketName}")
    private String bucketName;
     
     //省略其他代码...
 }  

server.port=8080
server.address=127.0.0.1

server:
  port: 8080
  address: 127.0.0.1

server:
  port: 8080
  address: 127.0.0.1

user:
  name: zhangsan
  age: 18
  password: 123456

hobby: 
  - java
  - game
  - sport

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/tlias
    username: root
    password: 1234
  servlet:
    multipart:
      max-file-size: 10MB
      max-request-size: 100MB
      
mybatis:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
    map-underscore-to-camel-case: true
    
aliyun:
  oss:
    endpoint: https://oss-cn-hangzhou.aliyuncs.com
    accessKeyId: LTAI4GCH1vX6DKqJWxd6nEuW
    accessKeySecret: yBshYweHOpqDuhCArrVHwIiBKpyqSL
    bucketName: web-397