springMVC設置裝備擺設情況完成文件上傳和下載。本站提示廣大學習愛好者：（springMVC設置裝備擺設情況完成文件上傳和下載）文章只能為提供參考，不一定能成為您想要的結果。以下是springMVC設置裝備擺設情況完成文件上傳和下載正文
比來的項目頂用到了文件的上傳和下載功效，我覺著這個功效比擬主要，是以特地把它提掏出來本身停止了測驗考試。
上面就是springMVC設置裝備擺設情況完成文件上傳和下載的詳細步調，供年夜家參考，詳細內容以下
1、 基本設置裝備擺設：
maven導包及設置裝備擺設pom.xml，導包時除開springmvc的基本依附外，須要導入文件上傳下載時用到的commons-io.jsr和commons-fileupload.jar：
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>filLoadTest</groupId>
<artifactId>filLoadTest</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>filLoadTest Maven Webapp</name>
<url>http://maven.apache.org</url>
<build>
<finalName>filLoadTest</finalName>
<plugins>
<!-- 以下設置裝備擺設可以包管每次強迫更新時jre版本不會變更，那我的eclipse4.4.1，maven3.2.5為例，假如不設置這個，每次強迫更新時jre就會變回1.5 -->
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
<encoding>UTF-8</encoding>
<compilerArguments>
<verbose />
<bootclasspath>${java.home}\lib\rt.jar</bootclasspath>
</compilerArguments>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.0.6.RELEASE</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.2.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.2.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.2.3</version>
</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>
</dependencies>
</project>
web.xml基本設置裝備擺設：
<?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="WebApp_ID" version="2.5"> <filter> <description>字符集過濾器</description> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <description>字符集編碼</description> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>springMVC</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> </servlet> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app>
spring基本設置裝備擺設spring.xml:
<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:annotation-config /> <mvc:annotation-driven /> <context:component-scan base-package="controllers" /> <!-- 防止IE履行AJAX時,前往JSON湧現下載文件 --> <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=utf-8</value> </list> </property> </bean> <!-- 啟動Spring MVC的注解功效，完成要求和注解POJO的映照 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJacksonHttpMessageConverter" /><!-- json轉換器 --> </list> </property> </bean> <!-- 支撐上傳文件 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" > <!-- 100M --> <property name="maxUploadSize" value="104857600"></property> <property name="defaultEncoding" value="utf-8"></property> </bean> </beans>
2、文件上傳的代碼
上傳的簡略頁面index.html,要留意form表單提交時的entype的設置：
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> </head> <body> <form action="./upLoadFile.do" method="post" enctype="multipart/form-data"> 選擇文件：<input type="file" name="file"/> <input type="submit" value="提交"/> </form> </body> </html>
上傳對應的後台java代碼，詳細成績見正文：
package controllers;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.io.FileUtils;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
@Controller
public class fileController {
/**
* 文件上傳
*
* @author：tuzongxun
* @Title: upLoadFile
* @param @param file
* @param @param request
* @param @throws IllegalStateException
* @param @throws IOException
* @return void
* @date Apr 28, 2016 1:22:00 PM
* @throws
*/
@RequestMapping(value = "/upLoadFile.do", method = RequestMethod.POST)
public void upLoadFile(HttpServletRequest request)
throws IllegalStateException, IOException {
// @RequestParam("file") MultipartFile file,
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(
request.getSession().getServletContext());
// 斷定 request 能否有文件上傳,即多部門要求
if (multipartResolver.isMultipart(request)) {
// 轉換成多部門request
MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
// 獲得request中的一切文件名
Iterator<String> iter = multiRequest.getFileNames();
while (iter.hasNext()) {
// 獲得上傳文件
MultipartFile f = multiRequest.getFile(iter.next());
if (f != null) {
// 獲得以後上傳文件的文件稱號
String myFileName = f.getOriginalFilename();
// 假如稱號不為“”,解釋該文件存在，不然解釋該文件不存在
if (myFileName.trim() != "") {
// 界說上傳途徑
String path = "C:\\Users\\tuzongxun123\\Desktop\\"
+ myFileName;
File localFile = new File(path);
f.transferTo(localFile);
}
}
}
}
}
}
被選擇文件提交後，便會看到選中的文件被傳到了代碼中指定的地位，頁面後果圖以下
3、文件下載
文件下載須要獲得下載文件的存儲途徑，這裡只是手動填入，假如是在詳細項目中，可以把文件名和上傳後的存儲途徑保留在數據庫中。然後增長一個文件列表的頁面展現文件名和文件途徑，然後點擊下載的時刻把響應的文件名和途徑傳到後台操作。
/**
* 文件下載，須要文件名和文件地址
*
* @author：tuzongxun
* @Title: download
* @param@param name
* @param@param path
* @param@return
* @param@throws IOException
* @returnResponseEntity<byte[]>
* @date Apr 28,2016 1:21:32 PM
* @throws
*/
@RequestMapping(value = "/downLoadFile.do")
public ResponseEntity<byte[]> download(@RequestParam("name") String name,
@RequestParam("filePath") String path) throws IOException {
File file = new File(path);
HttpHeaders headers = new HttpHeaders();
String fileName = new String(name.getBytes("UTF-8"), "iso-8859-1");// 為懂得決中文稱號亂碼成績
headers.setContentDispositionFormData("attachment", fileName);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),
headers, HttpStatus.CREATED);
}
Html頁面，這裡只是簡略的填寫文件名和文件途徑，用form表單提交到後台，然後後台會掌握response在頁面彈出保留文件途徑的選擇框，固然了，這裡的後台我沒有做甚麼處置，假如文件不存在是會報錯的，可以停止響應的處置：
文件下載：
</br> </br> <form action="./downLoadFile.do" method="post"> 文件名：<input type="text" name="name"/></br></br> 文件途徑：<input type="text" name="filePath"/></br></br> <input type="submit" value="確認下載"/> </form>
頁面視圖以下：
假如文件不存在，報錯以下：
以上就是本文的全體內容，願望對年夜家的進修有所贊助。
