#跨服务器文件上传 @FDDLC

先修课：#文件上传 #SpringMVC文件上传 @FDDLC

 

 

Maven依赖：明面上只需要导spring-webmvc、commons-fileupload(由浏览器上传到当前服务器)、jersey-client(由当前服务器上传到文件服务器)。

 

 

需要两台服务器，学习的话在本地跑两个Web项目就行，端口号要不一样，不然会有冲突！

 

表单核心部分：

<form method="post" enctype="multipart/form-data" action="test">
    请选择文件：<input type="file" name="upload"/><br/>
    <input type="submit" value="提交"/>
</form>

 

文件上传的核心代码：

public String test(@RequestParam("upload") MultipartFile multipartFile) throws Exception {
    String path = "http://localhost:9080/file_server_war_exploded/upload/";
    Client client = Client.create();
    WebResource resource = client.resource(path + multipartFile.getOriginalFilename());
    resource.put(multipartFile.getBytes());
    return "success";
}

 

说明：

1、需要在文件服务器下新建upload文件夹！如图：

2、主服务器可能会被禁止往文件服务器里写文件：jersey.api.client.UniformInterfaceException: PUT @FDDLC

 

 

 

 

 

---

最后附上源码：

 

 

项目结构：

 

pom.xml的内容：

<?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>org.example</groupId>
  <artifactId>P058_FileUpload_AcrossServer</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>P058_FileUpload_AcrossServer 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>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.1.8.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.1</version>
    </dependency>

    <dependency>
      <groupId>com.sun.jersey</groupId>
      <artifactId>jersey-client</artifactId>
      <version>1.18.1</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>P058_FileUpload_AcrossServer</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>3.1.0</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>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</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>

 

web.xml的内容：

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--关联springmvc.xml，让其中的配置生效！-->
    <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>
</web-app>

 

springmvc.xml的内容：

<?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:mvc="http://www.springframework.org/schema/context"
       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">
    <!--开启对Spring MVC注解的支持-->
    <mvc:component-scan base-package="cn.liuxingchang.controller"></mvc:component-scan>
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="viewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!--配置对上传文件进行解析的文件解析器-->
    <bean class="org.springframework.web.multipart.commons.CommonsMultipartResolver" id="multipartResolver">
        <property name="maxUploadSize" value="10485760"></property><!--以字节为单位-->
    </bean>
</beans>

 

index.jsp的内容：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
<form method="post" enctype="multipart/form-data" action="test">
    请选择文件：<input type="file" name="upload"/><br/>
    <input type="submit" value="提交"/>
</form>
</body>
</html>

 

success.jsp的内容：

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h3>success</h3>
</body>
</html>

 

HelloController.java的内容：

package cn.liuxingchang.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.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;

@Controller
public class HelloController {
    @RequestMapping("/test")
    public String test(@RequestParam("upload") MultipartFile multipartFile) throws Exception {
        String path = "http://localhost:9080/file_server_war_exploded/upload/";
        Client client = Client.create();
        WebResource resource = client.resource(path + multipartFile.getOriginalFilename());
        resource.put(multipartFile.getBytes());
        return "success";
    }

}