在该文档中,我将带领大家使用基于JAX-RS REST风格的实现Jersey来上传文件到服务器制定的文件夹,如果是图片并读取显示出该图片。
准备工作:
准备一个form表单,有两个字段,一个是type="file"和type="text",并且表单需要使用POST方式提交。注意改表单需要使用
multipart/form-data
。该项目使用netbeans8.0和glassfish4.0开发和运行。并且使用maven管理该工程;
需要在您的C盘建立一个文件夹,用来存储上传的文件。如C:\Newsportal\article_images
开发环境:
1 创建工程 在你项目空白处右键-》点击新建项目
2 在创建的项目中选择maven-》点击右侧web应用程序
3 填写工程的名字和maven的组ID和包名
4 选择该项目的运行环境为服务器Glassfish server
5 最后点击完成
准备搭建jersey的运行环境:
1 配置maven需要依赖包,maven的pom文件依赖如下:
<?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.vi8</groupId><artifactId>jerseyUploadDemo</artifactId><version>1.0-SNAPSHOT</version><packaging>war</packaging><name>jerseyUploadDemo</name><description> jersey上传文件DMEO</description><properties> <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies> <!-- Jersey --> <dependency> <groupId>org.glassfish.jersey.core</groupId> <artifactId>jersey-server</artifactId> <version>2.0</version> <type>jar</type> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish.jersey.ext</groupId> <artifactId>jersey-mvc-jsp</artifactId> <version>2.0</version> <type>jar</type> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish.jersey.media</groupId> <artifactId>jersey-media-json-jackson</artifactId> <version>2.0</version> <type>jar</type> <scope>provided</scope> </dependency> <!-- 上传文件需要该依赖--> <dependency> <groupId>org.glassfish.jersey.media</groupId> <artifactId>jersey-media-multipart</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> <!-- 这个用于上传文件工具操作--> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>javax</groupId> <artifactId>javaee-web-api</artifactId> <version>7.0</version> <scope>provided</scope> </dependency></dependencies><build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.7</source> <target>1.7</target> <compilerArguments> <endorseddirs>${endorsed.dir}</endorseddirs> </compilerArguments> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.3</version> <configuration> <failOnMissingWebXml>false</failOnMissingWebXml> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-dependency-plugin</artifactId> <version>2.6</version> <executions> <execution> <phase>validate</phase> <goals> <goal>copy</goal> </goals> <configuration> <outputDirectory>${endorsed.dir}</outputDirectory> <silent>true</silent> <artifactItems> <artifactItem> <groupId>javax</groupId> <artifactId>javaee-endorsed-api</artifactId> <version>7.0</version> <type>jar</type> </artifactItem> </artifactItems> </configuration> </execution> </executions> </plugin> </plugins></build></project>2 配置web.xml用以支持jersey,配置如下:
<?xml version="1.0" encoding="UTF-8"?><web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"><filter> <filter-name>JerseyFilter</filter-name> <filter-class>org.glassfish.jersey.servlet.ServletContainer</filter-class> <init-param> <param-name>javax.ws.rs.Application</param-name> <!--MyApplication.java jersey加载--> <param-value>com.vi8.upload.MyApplication</param-value> </init-param> <init-param> <param-name>jersey.config.servlet.filter.staticContentRegex</param-name> <param-value>/(img|css|js|font)/.*</param-value> </init-param> <init-param> <param-name>jersey.config.servlet.filter.forwardOn404</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>jersey.config.server.mvc.templateBasePath.jsp</param-name> <param-value>/WEB-INF/pages</param-value> </init-param> </filter> <filter-mapping> <filter-name>JerseyFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list></web-app>3 编写上面web.xml用到的MyApplication.java 如下:
package com.vi8.upload;import javax.ws.rs.ApplicationPath;import org.glassfish.jersey.jackson.JacksonFeature;import org.glassfish.jersey.media.multipart.MultiPartFeature;import org.glassfish.jersey.server.ResourceConfig;import org.glassfish.jersey.server.mvc.jsp.JspMvcFeature;/** * qq: 845885222@qq.com * * @author Administrator */@ApplicationPath("/")public class MyApplication extends ResourceConfig {public MyApplication() { packages("com.vi8.upload.resources"); register(JspMvcFeature.class); register(JacksonFeature.class); register(MultiPartFeature.class);}}以上步骤基本就是jersey运行环境准备工作,接下开始讨论文件如何上传的。
jersey文件上传:
1 文件上传的Resource类,你可以理解是spring mvc中控制器。UploadImageResource.java清单代码
package com.vi8.upload.resources;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.UnsupportedEncodingException;import java.util.Calendar;import java.util.logging.Level;import java.util.logging.Logger;import javax.servlet.http.HttpServletResponse;import javax.ws.rs.Consumes;import javax.ws.rs.GET;import javax.ws.rs.POST;import javax.ws.rs.Path;import javax.ws.rs.PathParam;import javax.ws.rs.Produces;import javax.ws.rs.core.Context;import javax.ws.rs.core.MediaType;import org.apache.commons.io.FileUtils;import org.glassfish.jersey.media.multipart.ContentDisposition;import org.glassfish.jersey.media.multipart.FormDataBodyPart;import org.glassfish.jersey.media.multipart.FormDataContentDisposition;import org.glassfish.jersey.media.multipart.FormDataMultiPart;import org.glassfish.jersey.media.multipart.FormDataParam;/** * qq : 845885222 * * @author Administrator */@Path("upload")public class UploadImageResource {/** * Constants operating with images */private static final String ARTICLE_IMAGES_PATH = "c:/Newsportal/article_images/";private static final String JPG_CONTENT_TYPE = "image/jpeg";private static final String PNG_CONTENT_TYPE = "image/png";/** * 第一种方式上传 * * @param fileInputStream * @param disposition * @return */@POST@Path("uploadimage1 ")@Consumes(MediaType.MULTIPART_FORM_DATA)public String uploadimage1(@FormDataParam("file") InputStream fileInputStream, @FormDataParam("file") FormDataContentDisposition disposition) { String imageName = Calendar.getInstance().getTimeInMillis() + disposition.getFileName(); File file = new File(ARTICLE_IMAGES_PATH + imageName); try { //使用common io的文件写入操作 FileUtils.copyInputStreamToFile(fileInputStream, file); //原来自己的文件写入操作 //saveFile(fileInputStream, file); } catch (IOException ex) { Logger.getLogger(UploadImageResource.class.getName()).log(Level.SEVERE, null, ex); } return "images/" + imageName;}/** * * * 第二种方式上传 使用FormDataMultiPart 获取表单数据 * * @param form * @param response * @return * @throws UnsupportedEncodingException */@POST@Path("uploadimage2")@Consumes(MediaType.MULTIPART_FORM_DATA)@Produces(MediaType.APPLICATION_JSON)public String uploadimage2(FormDataMultiPart form, @Context HttpServletResponse response) throws UnsupportedEncodingException { //获取文件流 FormDataBodyPart filePart = form.getField("file"); //获取表单的其他数据 FormDataBodyPart usernamePart = form.getField("username"); //ContentDisposition headerOfFilePart = filePart.getContentDisposition(); //把表单内容转换成流 InputStream fileInputStream = filePart.getValueAs(InputStream.class); FormDataContentDisposition formDataContentDisposition = filePart.getFormDataContentDisposition(); String source = formDataContentDisposition.getFileName(); String result = new String(source.getBytes("ISO8859-1"), "UTF-8"); System.out.println("formDataContentDisposition.getFileName()result " + result); String filePath = ARTICLE_IMAGES_PATH + result; File file = new File(filePath); System.out.println("file " + file.getAbsolutePath()); try { //保存文件 FileUtils.copyInputStreamToFile(fileInputStream, file);// saveFile(fileInputStream, file); } catch (IOException ex) { Logger.getLogger(UploadImageResource.class.getName()).log(Level.SEVERE, null, ex); } System.out.println("" + "images/" + result); response.setCharacterEncoding("UTF-8"); return "images/" + result;}/** * * 不从web服务器去读图片,在磁盘某个目录的文件可以通过流的方式去获取 ,通过 response.getOutputStream()放回数据 * * @param imageName image-name * @param type extension of image * @param response {@link HttpServletResponse} * @throws IOException */@GET@Path("/images/{name}.{type}")public void showImg(@PathParam("name") String imageName, @PathParam("type") String type, @Context HttpServletResponse response) throws IOException { System.out.println("showImg"); try (InputStream in = new FileInputStream(ARTICLE_IMAGES_PATH + imageName + "." + type)) { FileUtils.copyFile(new File(ARTICLE_IMAGES_PATH + imageName + "." + type), response.getOutputStream());// FileCopyUtils.copy(in, response.getOutputStream()); }}// 保存文件信息到磁盘 private void saveFile(InputStream uploadedInputStream, File file) { System.out.println("------saveFile-----"); try { OutputStream outpuStream = new FileOutputStream(file); int read = 0; byte[] bytes = new byte[1024];// outpuStream = new FileOutputStream(new File(serverLocation)); while ((read = uploadedInputStream.read(bytes)) != -1) { outpuStream.write(bytes, 0, read); } outpuStream.flush(); outpuStream.close(); } catch (IOException e) { e.printStackTrace(); }}}
2 当然要测试你也许还需要准备一个带有form表单的jsp文件
<form action="${pageContext.request.contextPath}/upload/uploadimage2" method="post" enctype="multipart/form-data"> <p> 文件 :<input type="file" name="file"/><br /> 用户名: <input type="text" name="username"/><br /> </p> <input type="submit" value="上传" /> </form>
3 测试输入http://localhost:8080/jerseyUploadDemo/
结果如下
最后贴上测试代码 在测试代码中会上面列出的有点出入.主要是显示使用Viewable 实现:
1 代码托管在此:
https://github.com/wangko27/jerseyUploadDemo
2 如果不用github你也可以来这儿下载 http://download.csdn.net/detail/wk313753744/8751943
3 当然如果下载链接失效,你还可以加入qq群: 438394076 讨论
jersey 文件上传-使用两种不同的方式
2015年05月29日 16:00:34 一名清官 阅读数:26224更多
个人分类: jersey
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