結合網絡大神提供的異常錯誤,及加上自身開發中時常遇到的一些問題,彙總到博客中,若有問題,謝謝提議;java
一、在dependencyManagement裏面加入包括版本在內的依賴信息,如:web
<dependency>spring
<groupId>joda-time</groupId>apache
<artifactId>joda-time</artifactId>api
<version>1.6.2</version>網絡
</dependency>mvc
二、在同級的dependencies節點裏面加入該依賴,如:app
<dependency>eclipse
<groupId>joda-time</groupId>webapp
<artifactId>joda-time</artifactId>
</dependency>
三、使用mvn eclipse:clean刪除當前的工程配置文件,並用mvn eclipse:eclipse從新生成。
四、導入或刷新該eclipse工程。
問題:Project configuration is not up-to-date with pom.xml
導入maven工程後,出現以下錯誤:
Description Resource Path Location Type Project configuration is not up-to-date with pom.xml. Run project configuration update rdc line 1 Maven Configuration Problem
解決辦法就是:
右鍵項目,【Maven】--》【Update Project Configuration...】便可。。。
Using platform encoding (GBK actually) to copy filtered resources
須要指定字符集:
<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-resources-plugin</artifactId> <version>2.2</version> <configuration> <encoding>UTF-8</encoding> </configuration> </plugin>
maven打包時始終出現TripApplyAction.java:[267,6]-source 1.3中不支持泛型(請使用-source 5或更高版本以啓用泛型)Map<String, Object> map = new HashMap<String, Object>();
解決方法,指定JDK版本:
在pom.xml文件中加入下一面一段語句來指定所用的版本,儘管在eclipse中配置了正確的「Build Path」:
<build> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <target>1.5</target> <source>1.5</source> <encoding>UTF-8</encoding> </configuration> </plugin> </plugins> </build>
從新運行mvn clean eclipse:eclipse -Dmaven.test.skip=true,接着mvn package,問題解決。
1. 使用maven命令:mvn dependency:sources 下載依賴包的源代碼。
2. 使用參數: -DdownloadSources=true 下載源代碼jar。 -DdownloadJavadocs=true 下載javadoc包。
mvn -Dmaven.test.failure.ignore=true package
mvn -Dmaven.test.skip=true clean package
[WARNING] Warning: selected war files include a WEB-INF/web.xml which will be ignored
(webxml attribute is missing from war task, or ignoreWebxml attribute is specified as 'true')
在使用Maven 編譯項目的時候會出現
[WARNING] Warning: selected war files include a WEB-INF/web.xml which will be ignored
解決方法:
<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.1.1</version> <configuration> <!-- http://maven.apache.org/plugins/maven-war-plugin/ --> <packagingExcludes>WEB-INF/web.xml</packagingExcludes> </configuration> </plugin>
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1.1:war (default-war) on project prospringmvc01: Error assembling WAR: webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode) ->
>> 版本控制報告:ChangeLog
maven-changelog-plugin可以基於版本控制系統中就近的變動記錄生成三分變動報告:
* Change Log:基於提交的變動報告,包括每次提交的日期、文件、做者、註釋等
* Developer Activity:基於做者的變動報告,包括做者列表以及每一個做者相關的提交次數和涉及文件數目。
* File Activity:基於文件的變動報告,包括變動的文件列表以及每一個文件的變動次數。
要想使用ChangeLog插件,必須先定義好SCM信息:
Xml代碼 收藏代碼
<scm>
<connection>scm:svn:http://192.168.1.103/app/trunk</connection>
<developerConnection>scm:svn:https://192.168.1.103/app/trunk</developerConnection>
<url>http://192.168.1.103/account/trunk</url>
</scm>
有了scm信息,開始配置maven-changelog-plugin了:
Xml代碼 收藏代碼
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-changelog-plugin</artifactId>
<version>2.2</version>
<configuration>
<type>range</type>
<range>60</range>
</configuration>
</plugin>
Failed to execute goal on project user-dao: Could not resolve dependencies for project org.konghao.user:user-dao:jar:0.0.1-SNAPSHOT: Failed to collect dependencies at org.konghao.user:user-log:jar:0.0.1-SNAPSHOT: Failed to read artifact descriptor for org.konghao.user:user-log:jar:0.0.1-SNAPSHOT: Could not find artifact org.konghao.user:user-parent:pom:0.0.1-SNAPSHOT in Nexus2 (http://192.168.18.246:8089/nexus/content/groups/public) -> [Help 1]
[ERROR]
maven中maven dependencies中依賴出現了項目,把依賴的項目關掉,項目消失,可是仍是沒法打包 ,出現的錯誤如圖。說明:依賴的項目爲project-dao 打包的項目爲project-service 都在project-parent中有依賴。project-dao是能夠打包成功的。project-service中依賴dao的jar包也能夠過來。
參考: http://www.oschina.net/question/143808_156035
<dependency> <groupId>javabuilder</groupId> <artifactId>javabuilder</artifactId> <version>1.0</version> <scope>system</scope> <systemPath>${project.basedir}/src/main/webapp/WEB-INF/lib/javabuilder.jar</systemPath> </dependency>
<plugin> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <configuration> <source>1.7</source> <target>1.7</target> <encoding>UTF-8</encoding> <compilerArguments> <extdirs>project-demo\lib</extdirs> </compilerArguments> </configuration> </plugin>
java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/servlet/ServletException at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:425) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:358) at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2625) at java.lang.Class.getDeclaredMethods(Class.java:1868)
解決方法: 註釋
<!-- j2ee web-6.0 --> <!-- <dependency> <groupId>javax</groupId> <artifactId>javaee-web-api</artifactId> </dependency> -->
5. JSP頁面加載報錯not native or abstract in class file javax/el/ValueExpression
[WARNING] EXCEPTION
javax.servlet.ServletException: java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/el/ValueExpression
at org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:939)
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:871)
at org.apache.jsp._404_jsp._jspService(org.apache.jsp._404_jsp:116)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:389)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380)
Caused by: java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/el/ValueExpression
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
參考網址: http://blog.csdn.net/chaijunkun/article/details/37923905
jetty啓動時,配置,解除資源文件鎖定
1.debug模式進入提示參數已經是Long類型
Id 類型爲: int(11)
Sql 語句 : SELECT id,cname,flag,layout_type,icon,remark,nlevel,left_id,right_id
FROM `tb_article_classify`
WHERE id='1'
解決Eclipse中Java工程間循環引用而報錯的問題 (慎用)
若是咱們的項目包含多個工程(project),而它們之間又是循環引用的關係,那麼Eclipse在編譯時會拋出以下一個錯誤信息:
「A cycle was detected in the build path of project: XXX」
解決方法很是簡單:
Eclipse Menu -> Window -> Preferences... -> Java -> Compiler -> Building -> Building path problems -> Circular dependencies -> 將Error改爲Warning
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project clothing: Compilation failure
[ERROR] Unable to locate the Javac Compiler in:
[ERROR] C:\Program Files\Java\jre6\..\lib\tools.jar
[ERROR] Please ensure you are using JDK 1.4 or above and
[ERROR] not a JRE (the com.sun.tools.javac.Main class is required).
[ERROR] In most cases you can change the location of your Java
[ERROR] installation by setting the JAVA_HOME environment variable.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
修改jre版本: jare改爲jdk