多文件上传演示
在服务器上部署应用程序并点击 URL：http://localhost:8080/JerseyDemos/fileUpload.html
现在选择两个/三个文件，然后单击上传按钮。
文件将存储在服务器上。
添加 MultiPartFeature
此外，我们需要在 Jersey 配置中添加 MultiPartFeature 以使其知道我们将使用多部分请求。
最简单的方法是通过web.xml文件添加支持。
<!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>jersey-serlvet</servlet-name> <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class> <init-param> <param-name>jersey.config.server.provider.packages</param-name> <param-value>com.onitroad.jersey</param-value> </init-param> <init-param> <param-name>jersey.config.server.provider.classnames</param-name> <param-value>org.glassfish.jersey.filter.LoggingFilter; org.glassfish.jersey.media.multipart.MultiPartFeature</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>jersey-serlvet</servlet-name> <url-pattern>/rest/*</url-pattern> </servlet-mapping> </web-app>
Jersey maven 多部分依赖
要使用 multipart 功能，我们需要将 jersey-media-multipart模块与其他必需的模块一起添加到 pom.xml文件中。
<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.onitroad.jersey</groupId>
<artifactId>JerseyDemos</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<repositories>
<repository>
<id>maven2-repository.java.net</id>
<name>Java.net Repository for Maven</name>
<url>http://download.java.net/maven/2/</url>
<layout>default</layout>
</repository>
</repositories>
<properties>
<jersey2.version>2.19</jersey2.version>
<jaxrs.version>2.0.1</jaxrs.version>
</properties>
<dependencies>
<!-- JAX-RS -->
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>${jaxrs.version}</version>
</dependency>
<!-- Jersey 2.19 -->
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet</artifactId>
<version>${jersey2.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>${jersey2.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
<version>${jersey2.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-multipart</artifactId>
<version>${jersey2.version}</version>
</dependency>
</dependencies>
<build>
<finalName>JerseyDemos</finalName>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
HTML/Ajax 代码
是时候查看客户端代码了。
我写了一个非常简单的文件，功能最少。
如果我们想对其进行一些特定更改，请告诉我。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta content="text/html;charset=utf-8" http-equiv="Content-Type" />
<meta content="utf-8" http-equiv="encoding" />
<script src="./js/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function()
{
$("#uploadBtn").click(function()
{
$('input[name="file"]').each(function(index, value)
{
var file = value.files[0];
if(file)
{
var formData = new FormData();
formData.append('file', file);
$.ajax({
url : '/JerseyDemos/rest/upload/pdf',
type : 'POST',
data : formData,
cache : false,
contentType : false,
processData : false,
success : function(data, textStatus, jqXHR) {
var message = jqXHR.responseText;
$("#messages").append("<li>" + message + "</li>");
},
error : function(jqXHR, textStatus, errorThrown) {
$("#messages").append("<li style='color: red;'>" + textStatus + "</li>");
}
});
}
});
});
});
</script>
</head>
<body>
<h1>JAX-RS Multi-file Upload Example</h1>
<form action="rest/upload/pdf" method="post" enctype="multipart/form-data">
<p>
Select file 1: <input type="file" name="file" size="45" accept=".pdf" />
</p>
<p>
Select file 2: <input type="file" name="file" size="45" accept=".pdf" />
</p>
<p>
Select file 3: <input type="file" name="file" size="45" accept=".pdf" />
</p>
<p>
<input id="uploadBtn" type="button" value="Upload PFD Files" />
</p>
</form>
<ul id="messages">
</ul>
</body>
</html>
https://onitroad.com 更多教程
编写上传 REST API
现在编写服务层 JAX-RS API，它实际上具有将上传的文件存储在服务器上的逻辑。
package com.onitroad.jersey;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.glassfish.jersey.media.multipart.FormDataContentDisposition;
import org.glassfish.jersey.media.multipart.FormDataParam;
@Path("/upload")
public class JerseyService
{
@POST
@Path("/pdf")
@Consumes({MediaType.MULTIPART_FORM_DATA})
public Response uploadPdfFile( @FormDataParam("file") InputStream fileInputStream,
@FormDataParam("file") FormDataContentDisposition fileMetaData) throws Exception
{
String UPLOAD_PATH = "c:/temp/";
try
{
int read = 0;
byte[] bytes = new byte[1024];
OutputStream out = new FileOutputStream(new File(UPLOAD_PATH + fileMetaData.getFileName()));
while ((read = fileInputStream.read(bytes)) != -1)
{
out.write(bytes, 0, read);
}
out.flush();
out.close();
} catch (IOException e)
{
throw new WebApplicationException("Error while uploading file. Please try again !!");
}
return Response.ok(fileMetaData.getFileName() + " uploaded successfully !!").build();
}
}
使用 Ajax 和 JAX-RS通过单击按钮上传多个文件
日期：2020-09-17 00:16:32 来源：oir作者：oir