Nginx 搭建图片服务器

╰+攻爆jí腚メ 2022-02-25 08:36 316阅读 0赞

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来源：http://t.cn/RY9AX0i

>  *  本章知识点
>  *  单元测试
>  *  Maven 的Web 项目
>     
>      *  项目核心配置文件
>      *  Service 层
>      *  Controller 层
>      *  Views视图层
>  *  总结

--------------------

本章内容通过Nginx 和 FTP 搭建图片服务器。**在学习本章内容前，请确保您的Linux 系统已经安装了Nginx和Vsftpd。**

> Nginx 安装
> 
> http://www.cnblogs.com/itdragon/p/7850985.html
> 
> Vsftpd 安装
> 
> http://www.cnblogs.com/itdragon/p/7857649.html

--------------------

# 本章知识点 #

效果图：

![640_wx_fmt_gif_tp_webp_wxfrom_5_wx_lazy_1][]

![20190401140340559.gif][]

*  需求：实现图片的上传和批量上传
 *  技术：Nginx，Vsftpd，Spring，SpringMVC，KindEditor，CentOS
 *  说明：本章节内容主要是实现图片的上传功能。使用 KindEditer 是为了更好的演示图片的上传，回显，批量效果。后台代码与KindEditer没有直接关系，放心阅读。另外源码中有Mybatis的jar，不用理会，本章内容用不到，是为后续内容做准备！
 *  源码：见文章底部
 *  场景：用户将图片上传到 tomcat 服务器上，再由 tomcat 服务器通过FTP上传到 Nginx 服务器上。
 *  ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEyNzcxMjM_size_16_color_FFFFFF_t_70][]

![20190401140340571.gif][]

项目结构：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTEyNzcxMjM_size_16_color_FFFFFF_t_70 1][]

![20190401140340561.gif][]

--------------------

# 单元测试 #

首先要攻破核心技术。通过单元测试实现图片上传的功能。

package com.itdragon.test;
    
    import java.io.File;
    import java.io.FileInputStream;
    
    import org.apache.commons.net.ftp.FTP;
    import org.apache.commons.net.ftp.FTPClient;
    import org.junit.Test;
    
    public class PictureFTPTest {
    
        // 测试 ftp 上传图片功能
        @Test
        public void testFtpClient() throws Exception {
            // 1. 创建一个FtpClient对象
            FTPClient ftpClient = new FTPClient();
            // 2. 创建 ftp 连接
            ftpClient.connect("192.168.0.11", 21);
            // 3. 登录 ftp 服务器
            ftpClient.login("ftpuser", "root");
            // 4. 读取本地文件
            FileInputStream inputStream = new FileInputStream(new File("F:\\hello.png"));
            // 5. 设置上传的路径
            ftpClient.changeWorkingDirectory("/usr/local/nginx/html/images");
            // 6. 修改上传文件的格式为二进制
            ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
            // 7. 服务器存储文件，第一个参数是存储在服务器的文件名，第二个参数是文件流
            ftpClient.storeFile("hello.jpg", inputStream);
            // 8. 关闭连接
            ftpClient.logout();
    
        }
    
    }

说明：这里的ip地址，端口，ftp用户名，密码，本地文件路径，以及Nginx服务器图片路径等，这些字符串参数都要根据自己实际设置的来填写的。如果你的Nginx和Vsftpd安装是按照我提供的链接来做的。那你只需要改ip地址即可。

--------------------

# Maven 的Web 项目 #

搭建Maven的Web 项目，之前有写过。这里就不过多描述。

## 项目核心配置文件 ##

首先是 Maven 的核心文件 pom.xml

<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">
        <modelVersion>4.0.0</modelVersion>
        <groupId>com.itdragon.upload</groupId>
        <artifactId>pictrue-service</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>war</packaging>
    
        
        <properties>
            <junit.version>4.12</junit.version>
            <spring.version>4.1.3.RELEASE</spring.version>
            <mybatis.version>3.2.8</mybatis.version>
            <mybatis.spring.version>1.2.2</mybatis.spring.version>
            <mybatis.paginator.version>1.2.15</mybatis.paginator.version>
            <mysql.version>5.1.6</mysql.version>
            <slf4j.version>1.6.4</slf4j.version>
            <jackson.version>2.4.2</jackson.version>
            <druid.version>1.0.9</druid.version>
            <httpclient.version>4.3.5</httpclient.version>
            <jstl.version>1.2</jstl.version>
            <servlet-api.version>2.5</servlet-api.version>
            <jsp-api.version>2.0</jsp-api.version>
            <joda-time.version>2.5</joda-time.version>
            <commons-lang3.version>3.3.2</commons-lang3.version>
            <commons-io.version>1.3.2</commons-io.version>
            <commons-net.version>3.3</commons-net.version>
            <pagehelper.version>3.4.2</pagehelper.version>
            <jsqlparser.version>0.9.1</jsqlparser.version>
            <commons-fileupload.version>1.3.1</commons-fileupload.version>
            <jedis.version>2.7.2</jedis.version>
            <solrj.version>4.10.3</solrj.version>
        </properties>
        <dependencies>
            
            <dependency>
                <groupId>joda-time</groupId>
                <artifactId>joda-time</artifactId>
                <version>${joda-time.version}</version>
            </dependency>
            
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-lang3</artifactId>
                <version>${commons-lang3.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-io</artifactId>
                <version>${commons-io.version}</version>
            </dependency>
            <dependency>
                <groupId>commons-net</groupId>
                <artifactId>commons-net</artifactId>
                <version>${commons-net.version}</version>
            </dependency>
            
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>${jackson.version}</version>
            </dependency>
            
            <dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpclient</artifactId>
                <version>${httpclient.version}</version>
            </dependency>
            
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
                <scope>test</scope>
            </dependency>
            
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
                <version>${slf4j.version}</version>
            </dependency>
            
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>${mybatis.version}</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>${mybatis.spring.version}</version>
            </dependency>
            <dependency>
                <groupId>com.github.miemiedev</groupId>
                <artifactId>mybatis-paginator</artifactId>
                <version>${mybatis.paginator.version}</version>
            </dependency>
            <dependency>
                <groupId>com.github.pagehelper</groupId>
                <artifactId>pagehelper</artifactId>
                <version>${pagehelper.version}</version>
            </dependency>
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql.version}</version>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>${druid.version}</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
                <version>${spring.version}</version>
            </dependency>
            
            <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
                <version>${jstl.version}</version>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
                <version>${servlet-api.version}</version>
                <scope>provided</scope>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jsp-api</artifactId>
                <version>${jsp-api.version}</version>
                <scope>provided</scope>
            </dependency>
            
            <dependency>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
                <version>${commons-fileupload.version}</version>
            </dependency>
            
            <dependency>
                <groupId>redis.clients</groupId>
                <artifactId>jedis</artifactId>
                <version>${jedis.version}</version>
            </dependency>
            
            <dependency>
                <groupId>org.apache.solr</groupId>
                <artifactId>solr-solrj</artifactId>
                <version>${solrj.version}</version>
            </dependency>
        </dependencies>
    
        <build>
            <finalName>${project.artifactId}</finalName>
            <plugins>
                
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>2.7</version>
                    <configuration>
                        <encoding>UTF-8</encoding>
                    </configuration>
                </plugin>
                
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.2</version>
                    <configuration>
                        <source>1.7</source>
                        <target>1.7</target>
                        <encoding>UTF-8</encoding>
                    </configuration>
                </plugin>
            </plugins>
            <pluginManagement>
                <plugins>
                    
                    <plugin>
                        <groupId>org.apache.tomcat.maven</groupId>
                        <artifactId>tomcat7-maven-plugin</artifactId>
                        <version>2.2</version>
                    </plugin>
                </plugins>
            </pluginManagement>
        </build>
    </project>

说明：和文件上传有直接关系的是：

<dependency>
         <groupId>commons-fileupload</groupId>
         <artifactId>commons-fileupload</artifactId>
    </dependency>

然后是 Web 项目的核心文件 web.xml

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
        id="taotao" version="2.5">
        <display-name>pictrue-service</display-name>
        
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/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>pictrue-service</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:spring/springmvc.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>pictrue-service</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
    </web-app>

再是 SpringMVC 配置文件 springmvc.xml，需要添加文件上传解析器

<bean id="multipartResolver"
            class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            
            <property name="defaultEncoding" value="UTF-8"></property>
            
            <property name="maxUploadSize" value="5242880"></property>
        </bean>

最后是 Ftp 配置文件 resource.properties

FTP_ADDRESS=192.168.0.11
    FTP_PORT=21
    FTP_USERNAME=ftpuser
    FTP_PASSWORD=root
    FTP_BASE_PATH=/usr/local/nginx/html/images
    IMAGE_BASE_URL=http://192.168.0.11/images

## Service 层 ##

上传图片的接口 PictureService.java

package com.itdragon.service;
    import java.util.Map;
    import org.springframework.web.multipart.MultipartFile;
    public interface PictureService {
    
        /**
         * 上传，批量上传接口
         * @param uploadFile
         * @return
         */
        Map uploadPicture(MultipartFile uploadFile);
    }

上传图片接口实现类 PictureServiceImpl.java

package com.itdragon.service.impl;
    
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.HashMap;
    import java.util.Map;
    
    import org.apache.commons.net.ftp.FTP;
    import org.apache.commons.net.ftp.FTPClient;
    import org.apache.commons.net.ftp.FTPReply;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.stereotype.Service;
    import org.springframework.web.multipart.MultipartFile;
    
    import com.itdragon.service.PictureService;
    
    @Service
    @SuppressWarnings({"rawtypes", "unchecked"})
    public class PictureServiceImpl implements PictureService {
    
        // 通过 Spring4 的 Value注解，获取配置文件中的属性值
        @Value("${FTP_ADDRESS}")
        private String FTP_ADDRESS;     // ftp 服务器ip地址
        @Value("${FTP_PORT}")
        private Integer FTP_PORT;       // ftp 服务器port，默认是21
        @Value("${FTP_USERNAME}")
        private String FTP_USERNAME;    // ftp 服务器用户名
        @Value("${FTP_PASSWORD}")
        private String FTP_PASSWORD;    // ftp 服务器密码
        @Value("${FTP_BASE_PATH}")
        private String FTP_BASE_PATH;   // ftp 服务器存储图片的绝对路径
        @Value("${IMAGE_BASE_URL}")
        private String IMAGE_BASE_URL;  // ftp 服务器外网访问图片路径
    
        @Override
        public Map uploadPicture(MultipartFile uploadFile) {
            Map resultMap = new HashMap<>();
            try {
                // 1. 取原始文件名
                String oldName = uploadFile.getOriginalFilename();
    
                // 2. ftp 服务器的文件名
                String newName = oldName;
                //图片上传
                boolean result = uploadFile(FTP_ADDRESS, FTP_PORT, FTP_USERNAME, FTP_PASSWORD, 
                        uploadFile.getInputStream(), FTP_BASE_PATH, newName);
                //返回结果
                if(!result) {
                    resultMap.put("error", 1);
                    resultMap.put("message", "upload Fail");
                    return resultMap;
                }
                resultMap.put("error", 0);
                resultMap.put("url", IMAGE_BASE_URL + "/" + newName);
                return resultMap;
    
            } catch (Exception e) {
                e.printStackTrace();
                resultMap.put("error", 1);
                resultMap.put("message", "upload Fail");
                return resultMap;
            }
        }
    
        /**
         * ftp 上传图片方法
         * @param ip            ftp 服务器ip地址
         * @param port          ftp 服务器port，默认是21
         * @param account       ftp 服务器用户名
         * @param passwd        ftp 服务器密码
         * @param inputStream   文件流
         * @param workingDir    ftp 服务器存储图片的绝对路径
         * @param fileName      上传到ftp 服务器文件名
         * @throws Exception
         * 
         */
        public boolean uploadFile(String ip, Integer port, String account, String passwd,
                InputStream inputStream, String workingDir, String fileName) throws Exception{
            boolean result = false;
            // 1. 创建一个FtpClient对象
            FTPClient ftpClient = new FTPClient();
            try {
                // 2. 创建 ftp 连接
                ftpClient.connect(ip, port);
                // 3. 登录 ftp 服务器
                ftpClient.login(account, passwd);
                int reply = ftpClient.getReplyCode(); // 获取连接ftp 状态返回值
                System.out.println("code : " + reply);
                if (!FTPReply.isPositiveCompletion(reply)) {
                    ftpClient.disconnect(); // 如果返回状态不再 200 ~ 300 则认为连接失败
                    return result;
                }
                // 4. 读取本地文件
    //          FileInputStream inputStream = new FileInputStream(new File("F:\\hello.png"));
                // 5. 设置上传的路径
                ftpClient.changeWorkingDirectory(workingDir);
                // 6. 修改上传文件的格式为二进制
                ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
                // 7. 服务器存储文件，第一个参数是存储在服务器的文件名，第二个参数是文件流
                if (!ftpClient.storeFile(fileName, inputStream)) {
                    return result;
                }
                // 8. 关闭连接
                inputStream.close();
                ftpClient.logout();
                result = true;
            } catch (Exception e) {
                e.printStackTrace();
            }finally {
                // FIXME 听说，项目里面最好少用try catch 捕获异常，这样会导致Spring的事务回滚出问题？？？难道之前写的代码都是假代码！！！
                if (ftpClient.isConnected()) {
                    try {
                        ftpClient.disconnect();
                    } catch (IOException ioe) {
                    }
                }
            }
            return result;
        }
    
    }

说明：

*  @Value 注解是Spring4 中提供的，@Value("$\{XXX\}")
 *  返回值是一个Map，并且key有error，url，message。这是根据KindEditer的语法要求来的。详情见链接。http://kindeditor.net/docs/upload.html

## Controller 层 ##

负责页面跳转的 PageController.java

package com.itdragon.controller;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    @Controller
    public class PageController {
    
        /**
         * 打开首页
         */
        @RequestMapping("/")
        public String showIndex() {
            return "index";
        }
    
        @RequestMapping("/{page}")
        public String showpage(@PathVariable String page) {
            System.out.println("page : " + page);
            return page;
        }
    }

负责图片上传的 PictureController.java

package com.itdragon.controller;
    
    import java.util.Map;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.multipart.MultipartFile;
    
    import com.fasterxml.jackson.core.JsonProcessingException;
    import com.fasterxml.jackson.databind.ObjectMapper;
    import com.itdragon.service.PictureService;
    
    @RestController
    public class PictureController {
    
        @Autowired
        private PictureService pictureService;
    
        @RequestMapping("pic/upload")
        public String pictureUpload(@RequestParam(value = "fileUpload") MultipartFile uploadFile) {
            String json = "";
            try {
                Map result = pictureService.uploadPicture(uploadFile);
                // 浏览器擅长处理json格式的字符串，为了减少因为浏览器内核不同导致的bug，建议用json
                json = new ObjectMapper().writeValueAsString(result);
            } catch (JsonProcessingException e) {
                e.printStackTrace();
            }
            return json;
        }
    }

说明：

*  @RestController 也是Spring4 提供的，是 @Controller + @ResponseBody 的组合注解。
 *  Controller层的返回值是一个json格式的字符串。是考虑到浏览器对json解析兼容性比较好。

## Views视图层 ##

负责上传图片的jsp页面 pic-upload.jsp

<%@ page language="java" contentType="text/html; UTF-8" pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>ITDragon 图片上传</title>
    </head>
        <link href="/js/kindeditor-4.1.10/themes/default/default.css" type="text/css" rel="stylesheet">
        <script type="text/javascript" src="js/jquery.min.js"></script> 
        <script type="text/javascript" charset="utf-8" src="/js/kindeditor-4.1.10/kindeditor-all-min.js"></script>
        <script type="text/javascript" charset="utf-8" src="/js/kindeditor-4.1.10/lang/zh_CN.js"></script>
    </head>  
    <body>  
        <h3>测试上传图片功能接口的form表单</h3>
        <form action="pic/upload" method="post" enctype="multipart/form-data">
            <input type="file" name="fileUpload" />
            <input type="submit" value="上传文件" />
        </form>
        <hr />
        <h3>借用KindEditor富文本编辑器实现批量上传图片</h3>
        <textarea id="kindEditorDesc" style="width:800px;height:300px;visibility:hidden;"></textarea>
        <script type="text/javascript">
            $(function(){
                //初始化富文本编辑器
                KindEditor.create("#kindEditorDesc", {
                    // name值，必须和Controller 的参数对应，不然会提示 400 的错误
                    filePostName : "fileUpload",
                    // action值，
                    uploadJson : '/pic/upload',
                    // 设置上传类型，分别为image、flash、media、file
                    dir : "image"
                });
            });
        </script>   
    </body>
    </html>

说明：pic-upload.jsp 分为两个部分，第一个部分是为了测试上传图片功能的form表单。第二个部分是为了更好的体验上传，批量上传，回显功能的KindEditer 富文本编辑器。

--------------------

# 总结 #

*  Nginx 搭建服务器的思维
 *  Java实现 Ftp上传图片的功能
 *  KindEditer 上传图片的功能

> 源码：https://github.com/ITDragonBlog/daydayup/tree/master/Nginx

Nginx 搭建图片服务器到这里就结束了，有什么不足的地方，请赐教。如果觉得不错，可以点个赞哦！

**生活很美好，明天见(｡･ω･｡)ﾉ♡**

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