Question

我用Google搜索了我遇到的问题然后我应用了所有给定的解决方案但不幸的是我在执行应用程序时仍然遇到相同的错误（链接错误）。我还发布了下面与问题相关的pom.xml的一部分

<dependency>
        <groupId>javax.el</groupId>
        <artifactId>el-api</artifactId>
        <version>2.2</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.2</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.glassfish.web</groupId>
        <artifactId>el-impl</artifactId>
        <version>2.2</version>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>com.sun.el</groupId>
        <artifactId>el-ri</artifactId>
        <version>1.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-api</artifactId>
        <version>7.0</version>
        <scope>provided</scope>
    </dependency>

错误讯息：

SEVERE: Critical error during deployment: 
java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" the class loader (instance of org/apache/catalina/loader/WebappClassLoader) of the current class, com/sun/faces/config/ConfigureListener, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have different Class objects for the type avax/el/ExpressionFactory; used in the signature
at com.sun.faces.config.ConfigureListener.registerELResolverAndListenerWithJsp(ConfigureListener.java:673)
at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:230)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4600)
at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5097)
at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5092)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Answer 1

你应该摆脱以下依赖：

<dependency>
    <groupId>org.glassfish.web</groupId>
    <artifactId>el-impl</artifactId>
    <version>2.2</version>
    <scope>runtime</scope>
</dependency>

这是elfish的glassfish实现。

Tomcat在el-api.jar目录中附带jasper-el.jar和lib（它自己的实现）。所以你不需要任何依赖。

此外：

 <dependency>
    <groupId>com.sun.el</groupId>
    <artifactId>el-ri</artifactId>
    <version>1.0</version>
    <scope>provided</scope>
</dependency>

也不需要。没有提供sun参考实现（如上所述，Tomcat附带了它自己的实现）。

此外，JEE7未随Tomcat提供。因此，具有以下依赖性（在提供的范围内）是错误的：

 <dependency>
    <groupId>javax</groupId>
    <artifactId>javaee-api</artifactId>
    <version>7.0</version>
    <scope>provided</scope>
</dependency>

您应该删除这三个依赖项。第一个是异常的原因。

在eclipse中执行应用程序时发生链接错误

1 个答案: