1.在index.jsp编写如下代码：
<%-- Created by IntelliJ IDEA. User: Adair Date: 2020/7/8 0008 Time: 10:18 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>文件上传</title> </head> <body> <h3>跨服务器文件上传</h3> <form action="/file/fileupload" method="post" enctype="multipart/form-data"> 选择文件：<input type="file" name="upload" /><br/> <input type="submit" value="上传" /> </form> </body> </html>2.创建文件上传控制器类控制器类的代码如下：
package com.txw.controller; import com.sun.jersey.api.client.Client; import com.sun.jersey.api.client.WebResource; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.multipart.MultipartFile; import java.util.UUID; @Controller @RequestMapping("/file") public class FileController { /** * 跨服务器文件上传 * @return */ @RequestMapping("/fileupload") public String fileuoload(MultipartFile upload) throws Exception { System.out.println("跨服务器文件上传..."); // 定义上传文件服务器路径 String path = "http://localhost:9090/uploads/"; // 说明上传文件项 // 获取上传文件的名称 String filename = upload.getOriginalFilename(); // 把文件的名称设置唯一值，uuid String uuid = UUID.randomUUID().toString().replace("-", ""); filename = uuid+"_"+filename; // 创建客户端的对象 Client client = Client.create(); // 和图片服务器进行连接 WebResource webResource = client.resource(path + filename); // 上传文件 webResource.put(upload.getBytes()); return "success"; } }3.需要用到依赖jar包的代码如下：
<?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"> <modelVersion>4.0.0</modelVersion> <groupId>com.txw</groupId> <artifactId>springmvc_day02_02_fileupload</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>springmvc_day02_02_fileupload Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <spring.version>5.0.2.RELEASE</spring.version> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>com.sun.jersey</groupId> <artifactId>jersey-core</artifactId> <version>1.18.1</version> </dependency> <dependency> <groupId>com.sun.jersey</groupId> <artifactId>jersey-client</artifactId> <version>1.18.1</version> </dependency> </dependencies> <build> <finalName>springmvc_day02_02_fileupload</finalName> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.0.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.7.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.20.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.0</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> </build> </project>4.使用flieupload服务运行结果如图所示： 5.使用Tomcat服务运行结果如图所示： 6.通过浏览器访问http://localhost:8080/如图所示： 7.点击上传会跳转如图所示的界面： 8.控制台打印结果如图所示： 9.找到本地F:\workspace\fileuploadserver\target\fileuploadserver\uploads如图所示： 10.如果出现如图所示的错误： 需要在D:\apache-tomcat-8.5.31\conf目录下web.xml如图所示：
打开web.xml找servlet并配置如图所示的代码：保存即可。 代码如下：
<init-param> <param-name>readonly</param-name> <param-value>false</param-value> </init-param>11.如果页面抛出404的错误，如图所示： 需要在另外一个存储文件的服务进行配置服务如图所示： 重写部署项目就不会报以上的错误！
