spring—文件上传
文件上传的回顾
导入文件上传的jar包
<?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>cn.itcast</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>
<!--文件上传的jar包 commons- -->
<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>
编写springMVC类
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 开启注解扫描 -->
<context:component-scan base-package="cn.itcast"/>
<!-- 视图解析器对象 -->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--前端控制器,哪些静态资源不拦截-->
<mvc:resources location="/css/" mapping="/css/**"/>
<mvc:resources location="/images/" mapping="/images/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
<!--配置文件解析器对象-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="10485760" />
</bean>
<!-- 开启SpringMVC框架注解的支持 -->
<mvc:annotation-driven />
</beans>
编写文件上传的JSP页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h3>传统文件上传</h3>
<form action="/user/fileupload1" 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>
编写文件上传的Controller控制器
/**
* 文件上传
* @return
*/
@RequestMapping("/fileupload1")
public String fileuoload1(HttpServletRequest request) throws Exception {
System.out.println("文件上传...");
// 使用fileupload组件完成文件上传
// 上传的位置
String path = request.getSession().getServletContext().getRealPath("/uploads/");
// 判断,该路径是否存在
File file = new File(path);
if(!file.exists()){
// 创建该文件夹
file.mkdirs();
}
// 解析request对象,获取上传文件项
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
// 解析request
List<FileItem> items = upload.parseRequest(request);
// 遍历
for(FileItem item:items){
// 进行判断,当前item对象是否是上传文件项
if(item.isFormField()){
// 说明普通表单向
}else{
// 说明上传文件项
// 获取上传文件的名称
String filename = item.getName();
// 把文件的名称设置唯一值,uuid
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";
}
编写文件上传的JSP页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
Title
传统文件上传
选择文件:
SpringMVC传统方式文件上传
SpringMVC框架提供了MultipartFile对象,该对象表示上传的文件,要求变量名称必须和表单?le标签的 name属性名称相同
与传统方式相比,解析文件更简单,
编写文件上传的Controller控制器
/**
* SpringMVC文件上传
* @return
*/
@RequestMapping("/fileupload2")
public String fileuoload2(HttpServletRequest request, MultipartFile upload) throws Exception {
System.out.println("springmvc文件上传...");
// 使用fileupload组件完成文件上传
// 上传的位置
String path = request.getSession().getServletContext().getRealPath("/uploads/");
// 判断,该路径是否存在
File file = new File(path);
if(!file.exists()){
// 创建该文件夹
file.mkdirs();
}
// 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;
// 完成文件上传
upload.transferTo(new File(path,filename));
return "success";
}
配置文件解析器对象
在springMVC里面配置
<!--配置文件解析器对象-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="10485760" />
</bean>
编写文件上传的JSP页面
选择文件:
SpringMVC跨服务器方式文件上
搭建图片服务器
? 根据文档配置tomcat9的服务器,现在是2个服务器
? 导入资料中day02_springmvc5_02image项目,作为图片服务器使用
导入开发需要的jar包
<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>
编写文件上传的JSP页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h3>跨服务器文件上传</h3>
<form action="/user/fileupload3" 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>
. 编写控制器
package cn.itcast.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;
@Controller
@RequestMapping("/user")
public class UserController {
/**
* 跨服务器文件上传
* @return
*/
@RequestMapping("/fileupload3")
public String fileuoload3(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";
}
原文地址:https://www.cnblogs.com/Lilwhat/p/12604099.html
时间: 2024-11-08 14:16:41