Java Apache HttpClient上传文件时出错(Java Apache HttpClient error uploading files)
我想使用HttpClient 4.3.1上传文件。 我需要添加以形成多部分输入流（以控制上载进度。）而不是File对象。 这是我的代码：
byte[] dump = ...; HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost(SENDLOG_URL); MultipartEntityBuilder meb = MultipartEntityBuilder.create(); meb.setMode(HttpMultipartMode.BROWSER_COMPATIBLE); // THIS WORKS!! meb.addBinaryBody("log", new File("C:\\temp.zip"), ContentType.APPLICATION_OCTET_STREAM,"log.zip"); InputStream is=new FileInputStream("C:\\temp.zip") meb.addBinaryBody("log", is, ContentType.DEFAULT_BINARY, "log.zip"); httppost.setEntity(meb.build()); HttpResponse resp=httpclient.execute(httppost); is.close();使用方法MultipartEntityBuilder.addBinaryBody（Strin，File）它可以工作，但是使用MultipartEntityBuilder.addBinaryBody（Strin，InputStream）它不起作用。
java客户端不会抛出任何错误，但这是远程服务器（Apache）的答案：
HTTP / 1.1 400错误请求 [日期：星期四，2013年11月28日09:46:08 GMT，服务器：Apache / 2.4.6（Unix）mod_fcgid / 2.3.7，内容长度：226，连接：关闭，内容类型：text / html; 字符集= ISO-8859-1]
为什么新的File（）和新的FileInputStream（）之间存在这种奇怪的行为？
I want to upload a file using HttpClient 4.3.1. I need to add to form multipart an inputstream (to control upload progress.) instead of a File object. This is my code:
byte[] dump = ...; HttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost(SENDLOG_URL); MultipartEntityBuilder meb = MultipartEntityBuilder.create(); meb.setMode(HttpMultipartMode.BROWSER_COMPATIBLE); // THIS WORKS!! meb.addBinaryBody("log", new File("C:\\temp.zip"), ContentType.APPLICATION_OCTET_STREAM,"log.zip"); InputStream is=new FileInputStream("C:\\temp.zip") meb.addBinaryBody("log", is, ContentType.DEFAULT_BINARY, "log.zip"); httppost.setEntity(meb.build()); HttpResponse resp=httpclient.execute(httppost); is.close();Using the method MultipartEntityBuilder.addBinaryBody(Strin,File) it works, but using MultipartEntityBuilder.addBinaryBody(Strin,InputStream) it doesn't work.
The java client doesn't throw any error, but this is the answer of remote server (Apache):
HTTP/1.1 400 Bad Request [Date: Thu, 28 Nov 2013 09:46:08 GMT, Server: Apache/2.4.6 (Unix) mod_fcgid/2.3.7, Content-Length: 226, Connection: close, Content-Type: text/html; charset=iso-8859-1]
Why this strange behaviour between new File() and new FileInputStream()?
原文：https://stackoverflow.com/questions/20262769
更新时间：2022-09-29 17:09
最满意答案
你需要一个OUTTER JOIN，这可以通过简单地添加
.DefaultIfEmpty()来完成。from a in context.Module_Articles_Articles join c in context.Module_Articles_Categories on a.CategoryID equals c.CategoryID into ca from c in cs.DefaultIfEmpty() join co in context.Module_Articles_Comments on a.ArticleID equals co.ArticleID into com from co in com.DefaultIfEmpty() where a.IsDraft == false orderby a.ArticleID descending select new ...you want an OUTTER JOIN, which can be accomplished in a query like this by simply adding
.DefaultIfEmpty()from a in context.Module_Articles_Articles join c in context.Module_Articles_Categories on a.CategoryID equals c.CategoryID into ca from c in cs.DefaultIfEmpty() join co in context.Module_Articles_Comments on a.ArticleID equals co.ArticleID into com from co in com.DefaultIfEmpty() where a.IsDraft == false orderby a.ArticleID descending select new ...
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