java programming problems and solutions

Solutions to Em-related problems in Oracle 10 GB The EM in Oracle 10 Gb adopts the web form to manage databases and related services. However, some em-related problems may occur during use. Based on the prompts from the peers and the actual experience of the author, I have summarized some ideas and hope to help related fans:(1) After the Database Console is st

Android Xutils framework usage Problems and Solutions I have just written a blog post and mentioned a problem that I encountered when using XUtils. The Android Xutils framework HttpUtil Get request cache problem. Now that I have raised this problem, I have thought about it, let's sort out several small issues that we encountered when using Xutils. I. HttpUtil Get request cache

Problem:When SPRINGMVC uses the Redirectview or the "redirect:" prefix for redirection, Spring MVC finally calls:Response.sendredirect (Response.encoderedirecturl (URL));For some browsers, opening a new browser window, the first time you access the server, Encoderedirecturl () appends a section of Jsessionid to the URL,If the initial URL is "http://www.sina.com.cn", the resulting URL is "http://www.sina.com.cn;jsessionid=126AFFB8D83764DB4843889A72C0E4B6 "This is typically the way

myWhy the Eclipse version is high (Version:luna Service Release 2 (4.4.2))5.spring upgrade to 4.x, ORM package inside Remove the support for Ibatis, so there are several ways to solveA. Upgrade to MyBatis (the cost is sufficient to choose, after all, after the upgrade to MyBatis)B.spring-orm package does not upgrade, still use spring3.xC.spring-orm upgrade to 4.x, add the following dependencies1 Dependency>2 groupId>Org.mybatisgroupId>3 Artifactid>Mybatis-2-springArtifactid>4 versio

Recently, many customers have reported that some codes of the videoactivity video of the standard Android demo have been transplanted to their own projects and the local video may not be displayed on a black screen or remote video, here we will summarize and describe these problems and provide solutions.1. Black screen and no display of local videosPossible cause: No audio/video parameters are set and the

Recently, many customers have reported that some codes of the videoactivity video of the standard Android demo have been transplanted to their own projects and the local video may not be displayed on a black screen or remote video, here we will summarize and describe these problems and provide solutions. 1. Black screen and no display of local videosPossible cause: No audio/video parameters are set and the

After installing Domino9, the following problems occur when you hit the language pack:[Email protected] cija5sc]#./lnxdomlp90_consoleInstallShield WizardNstallshield Wizard ...? Ava (tm).............................................................................................................................................................................................................................................................................

A summary of common problems and solutions for Android development 1.activitymanager:warning:activity not started, it current Taskhas been brought to the frontDescription: There is already an instance running in the emulator.Workaround: Quit the program running in the simulator and run it again to resolve it.2.Nogrammar constraints (DTD or XML Schema) detected for the documentDescription: In the editor, se

Atitit. Improve backup file copy speed (1)-----Analyze statistical problems and solutions 1. The present situation 1 2. Hard drive information approx. 50mb/s, 50iops 1 3. Statistical small file ratios 2 4. Replication Speed Estimation: 2 5. Small file type ratios by extension 2 6. Reasons for Slow::: ioPS too low ... 4 7. Solution::: 4 7.1. Upgrade to SSD Drive. 4 7.2. Clean up Garbage 4 7.3. Clean up Dupli

1 When you use the default UITableViewCell generating unit in your code, you cannot use the Dequeuereusablecellwithidentifier:forindexpath: method if you have not registered in the Viewdidload in advance. Such asUITableViewCell *cell = [TableView dequeuereusablecellwithidentifier:reusablecellwithidentifier forIndexPath: Indexpath];The following practices should be usedUITableViewCell *cell = [TableView dequeuereusablecellwithidentifier:reusablecellwithidentifier]; if (! = [[UITableViewCell allo

class in libary, you are prompted not to find a class or to resolve the solution: Open the manifest file in libary, set the android:targetsdkversion to match your Android version or higher, then 5, after the above processing, the Android project can be normal use of third-party libaryIii. Summary1. Imported libary and custom Android items must be in the same workspace and at the same level2. In the libary attribute,cancel the tick of Android Private libraries and Android dependencies3, libary i

throwsservletexception, IOException {Ten //Handling GET Requests oneSystem.out.println (request.getparameter ("ls"));//Do not process aString name = Request.getparameter ("ls"); - byte[] B = Name.getbytes ("iso-8859-1");// fallback -Name =NewString (b, "utf-8");//re-editing the System.out.println (name); - - } - public voiddoPost (httpservletrequest request, httpservletresponse response) + throwsservletexception, IOException { -

Hibernate data access; Nested exception is org.hibernate.exception.GenericJDBCException: Could not execute query] with root cause J Ava.sql.SQLException: Illegal mix of collations (gbk_chinese_ci,implicit) and (utf8_general_ci,coercible) for Operation ' LIKE 'Workaround:The coding problem is not unified. This project uses UTF-8 encoding, but it is mixed with GBK encoding. So the problem is caused. Find all GBK keywords in your project, and then change to UTF-8 to resolve the issue.V. Referenced

, the load in my server is 16 cores, no server cpu cores for all loads of 3 650) this. width = 650; "border =" 0 "alt =" "src =" http://www.bkjia.com/uploads/allimg/131229/195R35401-12.jpg "/>Now the problem is solved. If you want to enable oem to monitor oracle, you can use emctl start dbconsole for oracle users. Tip: Many database faults. When solving these problems, I suggest you first determine how the problem is generated and find the solution. I

1. The ueditor cannot be loaded repeatedly when the Ajax page is refreshed. UE. deleditor ('b014'); // call the del method var ue = UE. geteditor ('b014') when calling the initialization method '); 2. for Java project suggestions, use the source code provided by Baidu, do not reference the jar package officially provided, move config. json to the WEB-INF to ensure information security, delete controller. JSP. A servlet is used to process the UE

the serialization of the work, Build.gradle add Package referenceCompile (' Org.zalando:jackson-datatype-money:1.0.0-rc2 ')Then add the Jackson profile and you can add it at the root of the code@Configuration class jacksonconfig { @Bean public moneymodule moneymodule () { return New moneymodule (). Withmonetaryamount (money::of); }}Here are a few global annotations@Configuration labeled on a class, equivalent to using the class as a spring XML configuration file to : Configure the Sprin

Common problems and solutions in Web projects Http://blog.sina.com.cn/s/blog_51addfe401009e9s.html 1. Page effects such as: pop-up menu, there are special special effects code set. General DOM Operation (HTML,DIV) implementation 2. Minimize the use of hidden and display layers, instead of elements.innerhtml= "tagged text" dynamic overlay. 3. Database modeling: CDM/PDM, preferably directly with PDM, or dir

the port number after Note the name case. Target to server to see if the pool is up or not, to restart WebLogic garbled Problems (Java is based on Unicode): Add in We The Oracle XA's puzzleProblem Description: Oracle_xa;xaosw;d:oracleora92 dbmsXAORAXA9.lib c:msvcorasql9.libWhat do you mean, XAOSW?Answer: You can refer to the do

This configuration instance pro-test success, mutual encouragement, there are questions to everyone message.Environment: VMware + unbuntu 14.04For UNIX network programming, programming the first UNIX program encountered problems, can not contain unp.h file, this feeling and apue.h almost, but here need to compile source code, for later convenience, now tidy up as

"backdoor" of the browser, allowing the creation of new client programming languages (although not all languages are implemented as plug-ins ).9.3.2 scripting language The plug-in causes explosive growth of the script language. With this scripting language, you can directly Insert the source code for your client program to an HTML page, and the plug-in that language will be automatically activated when the HTML page is displayed. All scripting code i