cos instance, most concise code, upload the file back-end example, the optimal performance of free assembly

E_cos\.classpath
.....\.project
.....\.settings\.jsdtscope
.....\.........\org.eclipse.jdt.core.prefs
.....\.........\org.eclipse.wst.jsdt.ui.superType.container
.....\.........\org.eclipse.wst.jsdt.ui.superType.name
.....\build\classes\com\jadyer\servlet\UploadServelt.class
.....\.....\.......\...\......\util\RandomFileNamePolicy.class
.....\src\com\jadyer\servlet\UploadServelt.java
.....\...\...\......\util\RandomFileNamePolicy.java
.....\WebContent\META-INF\MANIFEST.MF
.....\..........\upload.jsp
.....\..........\WEB-INF\lib\cos.jar
.....\..........\.......\web.xml
.....\build\classes\com\jadyer\servlet
.....\.....\.......\...\......\util
.....\.....\.......\build\classes
.....\.....\.......\com\jadyer
.....\src\com\jadyer\servlet
.....\...\...\......\util
.....\build\classes\build
.....\.....\.......\com
.....\src\build\classes
.....\...\com\jadyer
.....\WebContent\WEB-INF\lib
.....\build\classes
.....\src\build
.....\...\com
.....\WebContent\META-INF
.....\..........\WEB-INF
.....\.settings
.....\build
.....\src
.....\WebContent
E_cos

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