JAVA网络爬虫
HttpClient

导航

 
传统文件上传/SpringMVC文件上传/跨服务器上传文件

传统文件上传/SpringMVC文件上传/跨服务器上传文件

项目结构fileupload**(文件服务器)/springmvc_fileupload(上传文件服务器)**

在这里插入图片描述

springmvc_fileupload配置文件

  1. pom.xml

    <?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.xiaoge</groupId>
  <artifactId>springmvc_fileupload</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>springmvc_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_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>3.1.0</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>

  2. web.xml**(重点:中文乱码的配置)**

    <!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>

  <!-- 前端控制器 -->
  <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:spring.xml</param-value>
    </init-param>

    <!-- 当启动服务器的时候创建servlet对象 -->
    <load-on-startup>1</load-on-startup>

  </servlet>

  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!-- 配置解决中文乱码的过滤器 -->
  <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>

</web-app>

  3. spring.xml**(重点:文件解析器)**

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

    <!-- 开启扫描注解 -->
    <context:component-scan base-package="com.xiaoge"></context:component-scan>

    <!-- 视图解析器 -->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!-- 前端控制器, 那些静态资源不拦截 -->
    <!-- css目录下的所有资源不拦截 -->
    <mvc:resources  location="/css/" mapping="/css/**" />
    <!-- images目录下的所有资源不拦截 -->
    <mvc:resources  location="/images/" mapping="/images/**" />
    <!-- js目录下的所有资源不拦截 -->
    <mvc:resources  location="/js/" mapping="/js/**" />


    <!-- 配置文件解析器 id值必须是multipartResolver名称 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="10485760"></property>
    </bean>

    <!-- 开启SpringMVC注解 -->
    <mvc:annotation-driven ></mvc:annotation-driven>
</beans>

fileupload配置文件**(创建maven项目后什么都不用管, 直接配置web.xml就行)**

  1. web.xml

    <!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配置是关键 -->
  <servlet>
    <servlet-name>default</servlet-name>
    <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>

    <init-param>
      <param-name>debug</param-name>
      <param-value>0</param-value>
    </init-param>

      <!--加入此行的含义是:接收文件的目标服务器可以支持写入操作-->
    <init-param>
      <param-name>readonly</param-name>
      <param-value>false</param-value>
    </init-param>

    <init-param>
      <param-name>listings</param-name>
      <param-value>false</param-value>
    </init-param>
    <!-- 当启动服务器的时候创建servlet对象 -->
    <load-on-startup>1</load-on-startup>

  </servlet>


</web-app>

springmvc_fileupload控制器

  1. UserController

    package com.xiaoge.controller;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
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.util.List;
import java.util.UUID;

/**
 * @Author: 潇哥
 * @DateTime: 2020/4/21 下午9:18
 * @Description: 控制器
 */
@Controller
@RequestMapping("/user")
public class UserController {

    /**
     * 传统: 文件上传
     * @throws Exception
     */
    @RequestMapping(value="/fileupload1")
    public String fileupload1(HttpServletRequest request) throws Exception {
        System.out.println("传统上传文件方式....");

        // 先获取到要上传的文件目录
        String path = request.getSession().getServletContext().getRealPath("/uploads");

        // 创建File对象，一会向该路径下上传文件
        File file = new File(path);

        // 判断路径是否存在，如果不存在，创建该路径
        if (!file.exists()) {
            file.mkdirs();
        }

        // 创建磁盘文件项工厂
        DiskFileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload fileUpload = new ServletFileUpload(factory);

        // 解析request对象
        List<FileItem> items = fileUpload.parseRequest(request);

        // 遍历
        for (FileItem item : items) {
            // 判断文件项是普通字段，还是上传的文件
            if (item.isFormField()) {

            } else {
                // 上传文件项
                // 获取上传文件的名称
                String filename = item.getName();

                // 设置图片名称唯一
                String uuid = UUID.randomUUID().toString().replace("_", "");
                filename = uuid + "_" + filename;

                // 完成文件上传
                item.write(new File(path, filename));

                // 删除临时文件
                item.delete();

            }
        }
        return "success";
    }


    /**
     * SpringMVC: 文件上传
     * @throws Exception
     */
    @RequestMapping(value="/fileupload2")
    public String fileupload2(HttpServletRequest request, MultipartFile upload) throws Exception {
        System.out.println("SpringMVC上传文件方式....");

        // 先获取到要上传的文件目录
        String path = request.getSession().getServletContext().getRealPath("/uploads");

        // 创建File对象，一会向该路径下上传文件
        File file = new File(path);

        // 判断路径是否存在，如果不存在，创建该路径
        if (!file.exists()) {
            file.mkdirs();
        }


        // 上传文件项
        // 获取上传文件的名称
        String filename = upload.getOriginalFilename();

        // 设置图片名称唯一
        String uuid = UUID.randomUUID().toString().replace("_", "");
        filename = uuid + "_" + filename;

        // 完成文件上传
        upload.transferTo(new File(path, filename));


        return "success";
    }


    /**
     * 跨服务器: 文件上传
     * @throws Exception
     */
    @RequestMapping(value="/fileupload3")
    public String fileupload3(MultipartFile upload) throws Exception {
        System.out.println("跨服务器上传文件方式....");

        // 定义上传文件服务器路径
        String path = "http://localhost:9090/uploads/";

        // 上传文件项
        // 获取上传文件的名称
        String filename = upload.getOriginalFilename();

        // 设置图片名称唯一
        String uuid = UUID.randomUUID().toString().replace("_", "");
        filename = uuid + "_" + filename;

        // 创建客户端对象
        Client client = Client.create();

        // 和图片服务器进行链接
        WebResource webResource = client.resource(path + filename);

        // 上传文件
        webResource.put(upload.getBytes());

        return "success";
    }
}

前台页面

  1. index.jsp

    <%--
  Created by IntelliJ IDEA.
  User: xiaoge
  Date: 2020/4/21
  Time: 下午9:18
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>index</title>
</head>
<body>
<%--传统方式上传文件--%>
<form action="user/fileupload1" method="post" enctype="multipart/form-data">
    <%--注意: 这个name必须写, 要不然解析request对象时, 解析不到--%>
    上传文件: <input type="file" name="upload">
    <br />
    <input type="submit" value="上传">
</form>


<%--SpringMVC上传文件--%>
<form action="user/fileupload2" method="post" enctype="multipart/form-data">
    <%--注意: name的值必须跟控制器方法的参数名称一致--%>
    上传文件: <input type="file" name="upload">
    <br />
    <input type="submit" value="上传">
</form>


<%--跨服务器上传文件--%>
<form action="user/fileupload3" method="post" enctype="multipart/form-data">
    <%--注意: name的值必须跟控制器方法的参数名称一致--%>
    上传文件: <input type="file" name="upload">
    <br />
    <input type="submit" value="上传">
</form>

</body>
</html>

  2. success.jsp

    <%--
  Created by IntelliJ IDEA.
  User: xiaoge
  Date: 2020/4/21
  Time: 下午9:19
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>上传成功</title>
</head>
<body>
    <h3>上传成功</h3>
</body>
</html>
posted on 2020-04-25 17:58  gmlgxx  阅读(38)  评论(0)    收藏  举报
 
博客园  ©  2004-2025
浙公网安备 33010602011771号 浙ICP备2021040463号-3