Java File oss文件

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mob64ca14031c97 2025-01-06 14:59:18

文章标签 Java File oss文件 vue java spring mvc 文章分类 Java 后端开发

写在前面（准备工作）：

（1）依赖引入

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.3.19</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.1</version>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.24</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.13.2.2</version>
    </dependency>

<!--    文件上传依赖 commons-fileupload-->
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.4</version>
    </dependency>

<!--    oss依赖-->
    <dependency>
      <groupId>com.aliyun.oss</groupId>
      <artifactId>aliyun-sdk-oss</artifactId>
      <version>3.10.2</version>
    </dependency>

DispatcherServlet配置

DispatcherServlet是Spring MVC中最核心的对象；DispatcherServlet用于拦截Http请求；并根据请求的URL，找到与之对应的Controller控制器中的方法，来完成对该Http请求的处理

<!--    dispatcherServlet-->
  <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:springmvc.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>DispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

（3）在springmvc配置文件中配置文件上传解析器

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

    <!--    扫描包-->
    <context:component-scan base-package="com.lcy.controller"/>

    <mvc:annotation-driven/>
    <!--    静态处理-->
    <mvc:default-servlet-handler/>

<!--    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">-->
<!--        <property name="maxUploadSize" value="10485760"/>-->
<!--    </bean>-->

<!--    配置文件上传配置 id必须为multipartResolver-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="10485760"/>
    </bean>

</beans>

（4）阿里云OSS

Java File oss文件_Java File oss文件

Java File oss文件_vue_02

Java File oss文件_mvc_03

Java File oss文件_vue_04

之后依据密钥对Bucket进行上传文件（可以理解为id和密码，输入后可以确认身份进行上传）

准备工作完成

1. 进行文件上传

（1）先去阿里云官方给的OSS帮助文档中查看安装（这里前面已经引入过以来了）

Java File oss文件_java_05

（2）查看文件流上传（这是官网给的上传代码，根据上面提示进行修改）

Java File oss文件_java_06

package com.lcy.controller;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDateTime;
import java.util.UUID;

/**
 * @Author Lcy
 * @Date 2022/6/9
 */
@Controller
public class UploadController {

    @RequestMapping("upload03")
    public String upload03(MultipartFile myfile, HttpServletRequest request) throws IOException {
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "oss-cn-hangzhou.aliyuncs.com";
        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
        String accessKeyId = "你的密钥id";
        String accessKeySecret = "你的密钥密码";
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "luckylcy";
        // 填写Object完整路径，完整路径中不能包含Bucket名称，例如exampledir/exampleobject.txt。
        LocalDateTime ldt = LocalDateTime.now();

        String objectName = ldt.getYear() + "/" + ldt.getMonthValue() + "/" + ldt.getDayOfMonth() +
                "/" + UUID.randomUUID().toString().replace("-","") + myfile.getOriginalFilename();

        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        try {
            InputStream inputStream = myfile.getInputStream();
            // 创建PutObject请求。
            ossClient.putObject(bucketName, objectName, inputStream);
        } catch (Exception e){
            e.printStackTrace();
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
//        http://luckylcy.oss-cn-hangzhou.aliyuncs.com/2022/6/10/08e69a25ebb74fdcbf165f63730286b8yl.png
        String url = "http://" + bucketName + "." + endpoint + "/" + objectName;
        request.setAttribute("imgUrl",url);
        return "success.jsp";
    }
}

（3）创建页面

<%--
  Created by IntelliJ IDEA.
  User: lcy28
  Date: 2022/6/9
  Time: 18:50
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <form method="post" action="/upload03" enctype="multipart/form-data">
        <input type="file" name="myfile"/><br>
        <input type="submit" value="提交"/>
    </form>
</body>
</html>

（4）运行Tomcat，进行文件上传

Java File oss文件_vue_07

提交成功后，就可以通过网址进行访问了。

3. ElementUI + Vue + axios 进行文件上传。

（1）页面设计

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
    <!--引入element得css样式-->
    <link type="text/css" rel="stylesheet" href="css/index.css"/>
    <!--引入vue得js文件 这个必须在element之前引入-->
    <script type="text/javascript" src="js/vue.js"></script>
    <script type="text/javascript" src="js/qs.min.js"></script>
    <script type="text/javascript" src="js/axios.min.js"></script>
    <!--element得js文件-->
    <script type="text/javascript" src="js/index.js"></script>

    <style>
        .avatar-uploader .el-upload {
            border: 1px dashed #d9d9d9;
            border-radius: 6px;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        .avatar-uploader .el-upload:hover {
            border-color: #409EFF;
        }
        .avatar-uploader-icon {
            font-size: 28px;
            color: #8c939d;
            width: 178px;
            height: 178px;
            line-height: 178px;
            text-align: center;
        }
        .avatar {
            width: 178px;
            height: 178px;
            display: block;
        }
    </style>
</head>
<body>
<div id="app">

    <el-form label-width="80px" :model="userForm">
        <el-form-item label="头像">
            <el-upload
                    class="avatar-uploader"
                    action="/uploadAvatar"
                    :show-file-list="false"
                    :on-success="handleAvatarSuccess"
                    :before-upload="beforeAvatarUpload">
                <img v-if="imageUrl" :src="imageUrl" class="avatar">
                <i v-else class="el-icon-plus avatar-uploader-icon"></i>
            </el-upload>
        </el-form-item>
        <el-form-item label="姓名">
            <el-input v-model="userForm.name"></el-input>
        </el-form-item>
        <el-form-item label="住址">
            <el-input v-model="userForm.address"></el-input>
        </el-form-item>
        <el-form-item label="注册日期">
            <el-input v-model="userForm.date"></el-input>
        </el-form-item>
        <el-form-item>
            <el-button type="primary" @click="submitForm">提交</el-button>
        </el-form-item>
    </el-form>
</div>
</body>
<script>
    var app = new Vue({
        el:"#app",
        data: {
            imageUrl: '',
            userForm:{},
        },
        methods: {
            handleAvatarSuccess(res, file) {
                if(res.code === 2000){
                    this.imageUrl = res.data;
                    this.userForm.imgUrl = res.data;
                    this.$message.success(res.message)
                }else {
                    this.$message.error(res.message)
                }

            },
            beforeAvatarUpload(file) {
                const isJPG = file.type === 'image/jpeg';
                const isLt2M = file.size / 1024 / 1024 < 2;

                if (!isJPG) {
                    this.$message.error('上传头像图片只能是 JPG 格式!');
                }
                if (!isLt2M) {
                    this.$message.error('上传头像图片大小不能超过 2MB!');
                }
                return isJPG && isLt2M;
            },
            submitForm(){
                axios.post("addUser",this.userForm).then(function (result){
                    if(result.code === 2000){
                        this.$message.success(result.message)
                    }
                })
            }
        }
    })
</script>
</html>

Java File oss文件_Java File oss文件_08

(2) 把上传文件的代码封装到一个Util工具类中，并设计一个CommonResult类：处理器接收信息处理后返回的数据（返回的是一个字符串，表示上传后文件的访问路径）

package com.lcy.util;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import org.springframework.web.multipart.MultipartFile;

import java.io.InputStream;
import java.time.LocalDateTime;
import java.util.UUID;

/**
 * @Author Lcy
 * @Date 2022/6/10
 */
public class OSSUtil {
    public static String upload(MultipartFile file){
        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
        String endpoint = "oss-cn-hangzhou.aliyuncs.com";
        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
        String accessKeyId = "你的密钥id";
        String accessKeySecret = "你的密钥密码";
        // 填写Bucket名称，例如examplebucket。
        String bucketName = "luckylcy";
        // 填写Object完整路径，完整路径中不能包含Bucket名称，例如exampledir/exampleobject.txt。
        LocalDateTime ldt = LocalDateTime.now();

        String objectName = ldt.getYear() + "/" + ldt.getMonthValue() + "/" + ldt.getDayOfMonth() +
                "/" + UUID.randomUUID().toString().replace("-","") + file.getOriginalFilename();

        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        try {
            InputStream inputStream = file.getInputStream();
            // 创建PutObject请求。
            ossClient.putObject(bucketName, objectName, inputStream);
        } catch (Exception e){
            e.printStackTrace();
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
//        http://luckylcy.oss-cn-hangzhou.aliyuncs.com/2022/6/10/08e69a25ebb74fdcbf165f63730286b8yl.png
        String url = "http://" + bucketName + "." + endpoint + "/" + objectName;
        return url;
    }
}

package com.lcy.util;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @Author Lcy
 * @Date 2022/6/10
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class CommonResult {
    private Integer code;
    private String message;
    private Object data;
}

（3）设计Controller

package com.lcy.controller;

import com.lcy.entity.User;
import com.lcy.util.CommonResult;
import com.lcy.util.OSSUtil;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

/**
 * @Author Lcy
 * @Date 2022/6/10
 */
@RestController
public class UserController {

    @RequestMapping("uploadAvatar")
    @ResponseBody
    public CommonResult uploadAvatar(MultipartFile file){
        try {
            String filePath = OSSUtil.upload(file);
            return new CommonResult(2000, "头像上传成功", filePath);
        }catch (Exception e){
            e.printStackTrace();
        }
        return new CommonResult(2000, "头像上传失败", null);
    }
}

此时，文件已经可以上传了并进行回显了。

（4）增加User实体类，用来封装前台传来的数据

package com.lcy.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.format.annotation.DateTimeFormat;

import java.util.Date;

/**
 * @Author Lcy
 * @Date 2022/6/10
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
    private String imgUrl;
    private String name;
    private String address;
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    private Date date;
}

（5）在设计User添加的Controller类

@RequestMapping("addUser")
    public CommonResult addUser(@RequestBody User user){
        //接收到前台传来的数据后，应该通过service对数据库进行增加，再次不做处理，仅仅打印出信息
        System.out.println(user);
        return new CommonResult(2000, "添加用户成功", null);
    }

（6）测试

Java File oss文件_java_09