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C#判断文件和文件夹是否存在 不存在则创建
using System.IO;string path = @"D:\accountDaoRu"; if (Directory.Exists(path) == false) { Directory.CreateDirectory(path); }if (Directory.Exists(Server...
分类:其他好文   时间:2014-07-23 22:13:17    阅读次数:250
eclipse 中添加工程 Some projects cannot be imported because they already exist in the workspace
第一次从外部文件导入HelloWorld工程到workspace目录中,成功。删除后,再次从外部导入workspace目录提示Some projects cannot be imported because they already exist in the workspaceeclipse中删除H...
分类:系统相关   时间:2014-07-23 20:40:15    阅读次数:252
Android Exception 7(attempt to re-open an already-closed object )
07-23 18:16:17.641: W/SQLiteConnectionPool(28390): A SQLiteConnection object for database '/storage/emulated/0/cnOA.db' was leaked! Pl...
分类:移动开发   时间:2014-07-23 20:36:55    阅读次数:246
Illegal access:this web application instance has been stopped already
七月 23, 2014 2:34:35 下午 org.apache.catalina.loader.WebappClassLoader loadClass信息: Illegal access: this web application instance has been stopped alread...
分类:移动开发   时间:2014-07-23 15:17:46    阅读次数:277
gen already exists but is not a source folder
遇到android项目导入出现后重复空包等错误,往往是导入的java编译级别有关,点击项目properties->java Compiler ->修改Compiler compliance level 一般是1.6。修改完成clean项目之后,往往还会遇到:gen already exists bu...
分类:其他好文   时间:2014-07-23 14:47:56    阅读次数:244
Oracele Timesten连接DSN创建用户
1.       启动开启 [tt@host2 info]$ ttDaemonAdmin -start -force /home/tt/TimesTen/tt1122/info/timestend.pid file exists, attempt start due to -force option. TimesTen Daemon startup OK. 2.       添加测...
分类:其他好文   时间:2014-07-23 13:06:36    阅读次数:244
mysql索引之or条件
在某些情况下,or条件可以避免全表扫描的。 1 .where 语句里面如果带有or条件, myisam表能用到索引, innodb不行。1)myisam表: CREATE TABLE IF NOT EXISTS `a` ( `id` int(1) NOT NULL AUTO_INCREMENT, `...
分类:数据库   时间:2014-07-23 12:44:26    阅读次数:303
spring 和 mybatis集成的warn问题
warn:Skipping MapperFactoryBean with name ‘appOperateRecordMapper‘ and ‘XX.XX.XX.daor‘ mapperInterface. Bean already defined with the same name! 2014-07-22 18:02:29? WARN [main] (ClassPathMapperSc...
分类:编程语言   时间:2014-07-23 00:35:38    阅读次数:315
Android4.4W ADT更新问题 is already installed
今天更新Android4.4W 版本SDK,更新完后顺便更新ADT,结果更新后报错,导致SDK不能用.出现类似以下的报错: Android Native Development Tools is already installed, so an update will be performed instead. Cannot complete the install because one...
分类:移动开发   时间:2014-07-23 00:07:17    阅读次数:348
FileAlreadyExistsException: Output directory hdfs://ubuntu:9000/output09 already exists
14/07/21 17:49:59 ERROR security.UserGroupInformation: PriviledgedActionException as:chenlongquan cause:org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory hdfs://ubuntu:9000/output0...
分类:其他好文   时间:2014-07-22 14:38:19    阅读次数:179
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