原文网址:http://tdppro.blog.51cto.com/749956/1388853 1.DownLoading the Support Libraries 1)Start the Android SDK Manager. 2)In the SDK Manager window, scroll to the end of the Packages list, find theExtras folder and, if necessary, expand to show its con
用fs.copyToLocalFile( hdfsPath,localPath);下载hdfs的文件会报NullPointerException,具体报错为: java.lang.NullPointerException at java.lang.ProcessBuilder.start(ProcessBuilder.java:) at org.apache.hadoop.util.Shell.runCommand(Shell.java:) at org.apache.hadoop.util.S
@RequestMapping(value = "/export.do") public void exportpushuserByareacode(HttpServletRequest req, HttpServletResponse rsp) throws Exception { List list = .....; String name="导出的文件.csv"; name = new String(name.getBytes("GBK")
excel文件的导入导出是很常见的功能,这次做了个下载的功能,踩了一些坑,记下来避免以后重复踩…… 1.inputstream序列化问题 Could not write JSON document: No serializer found for class java.io.FileDescriptor and no properties discovered to create BeanSerializer 客户端调取服务端上传,从前台获取的file文件中拿到inputstream,做一些判断