NoClassDefFoundError: org/slf4j/impl/StaticLoggerBinder

Question

I'm trying to run the sample tiles example given here .

Below is my POM.xml:

<dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.tiles</groupId>
            <artifactId>tiles-api</artifactId>
            <version>2.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tiles</groupId>
            <artifactId>tiles-core</artifactId>
            <version>2.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tiles</groupId>
            <artifactId>tiles-jsp</artifactId>
            <version>2.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.5.2</version>
        </dependency>

When I'm trying to run the example the below error is thrown:

Sep 17, 2010 11:59:43 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Error configuring application listener of class      org.apache.tiles.web.startup.TilesListener
java.lang.NoClassDefFoundError: org/slf4j/impl/StaticLoggerBinder
at org.slf4j.LoggerFactory.<clinit>(LoggerFactory.java:60)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:131)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:685)
at org.apache.tiles.web.startup.TilesListener.<init>(TilesListener.java:49)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)

Any idea?

I spent 30 minutes googling for this but could not find a possible sollution.

Please help me...

Answer 1

You have included a dependency on the SLF4J API, which is what you use in your application for logging, but you must also include an implementation that does the real logging work.

For example to log through Log4J you would add this dependency:

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.5.2</version>
    </dependency>

The recommended implementation would be logback-classic, which is the successor of Log4j, made by the same guys that made SLF4J and Log4J:

<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>0.9.24</version>
</dependency>

Note: The versions may be incorrect.

Answer 2

你已经包含了sflj的api的依赖，但没有包含实现api的依赖，那是一个单独的jar，你可以试试slf4j-simple-1.6.1.jar。

Answer 3

将所有tiles jars like(tiles-jsp,tiles-servlet,tiles-template,tiles-extras.tiles-core) 添加到你的服务器lib文件夹和你的应用程序构建路径，然后如果你在spring mvc应用程序中使用apache tailes，它就可以工作

Answer 4

Copy all order entries of home folder .iml file into your /src/main/main.iml file. This will solve the problem.

Answer 5

i had the same error while working with hibernate, i had added below dependency in my pom.xml that solved the problem

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.7.10</version>
    </dependency>

reference https://mvnrepository.com/artifact/org.slf4j/slf4j-api

Answer 6

A good practice to ensure consistency of SL4J versions is to centralize the version in a property like this:

...
    <properties>
        <org.slf4j.version>1.5.2</org.slf4j.version><!-- SLF4J release -->
    </properties>
...
     <dependencies>
        <!-- SL4J with LOG4J implementation -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${org.slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${org.slf4j.version}</version>
        </dependency>
...