我有一个旧的struts
1应用程序,该应用程序始终使用Ant构建,我将其转换为使用Maven。我的应用程序的结构是模块化的,在包含的模块中具有依赖项管理。包含模块的dep
mgmt部分包含:
<dependencyManagement>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
...
</dependencies>
</dependencyManagement>
构建战争(package
从包含的模块运行Maven作业)并从intelliJ运行具有该战争的Tomcat配置时,我在浏览器中看到以下内容:
org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to load class for JSP
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:161)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause
org.apache.jasper.JasperException: Unable to load class for JSP
org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:630)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:149)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause
java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
java.net.URLClassLoader$1.run(URLClassLoader.java:202)
java.security.AccessController.doPrivileged(Native Method)
java.net.URLClassLoader.findClass(URLClassLoader.java:190)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:134)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:66)
org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:628)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:149)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
通过搜索可以发现的所有内容都表明,原因是javax.servlet jars中的版本冲突,但是我的WEB-INF /
lib目录中根本没有任何内容。我一直在使用的范围尝试provided
,compile
甚至install/pom
,但那些没有做任何帮助。
Tomcat日志中没有其他内容。
我确认正在编译jsps。我正在使用jspc-maven-plugin。
在我的子模块(而不是包含子模块)的pom.xml中,我具有:
<build>
<!-- default goal to run if somebody doesn't pick one (rarely matters) -->
<defaultGoal>install</defaultGoal>
<!-- resources and filtering - also see configuration under maven-war-plugin below -->
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<filters>
<filter>src/main/resources/${env}.properties</filter>
<filter>src/main/resources/${env}.tokens</filter>
</filters>
<plugins>
<!-- begin - precompiling jsps -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>jspc-maven-plugin</artifactId>
<executions>
<execution>
<id>jspc</id>
<goals>
<goal>compile</goal>
</goals>
<configuration>
<warSourceDirectory>${basedir}/src/main/webroot</warSourceDirectory>
<inputWebXml>${basedir}/src/main/webroot/WEB-INF/web.xml</inputWebXml>
<!--<workingDirectory>${basedir}/src/main/webroot</workingDirectory>-->
</configuration>
</execution>
</executions>
</plugin>
<!-- end - precompiling jsps -->
<!-- used to build warfiles -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.0</version>
<configuration>
<webResources>
<resource>
<directory>${pom.basedir}/src/main/webroot</directory>
<filtering>true</filtering>
<!--<targetPath>WEB-INF</targetPath>-->
</resource>
</webResources>
</configuration>
</plugin>
</plugins>
</build>
我可以在Maven构建输出中看到正在编译jsps。但是我仍然得到JasperException。
自从我发布这篇文章已经有一段时间了,但是我认为我应该展示出自己的想法(就我现在所记得的一样)。
我做了一个Maven依赖树来查找依赖冲突,并且删除了所有包含依赖排除的冲突,例如:
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging-api</artifactId>
<version>1.1</version>
<exclusions>
<exclusion>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
</exclusion>
</exclusions>
</dependency>
另外,我将provided
作用域用于javax.servlet依赖关系,以免在运行该应用程序时与Tomcat提供的内容产生其他冲突。
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
HTH。