Error with org.slf4j.Logger

I have an error when I import the org.slf4j.* packages.

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

Do you have any idea开发者_运维问答s where it came from ?

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You must include JARs in your classpath. I'd suggest the following:

• slf4j-api-1.7.7.jar
• slf4j-simple-1.7.7.jar

They can be found on: http://www.slf4j.org/download.html

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You should take a look at SL4J (Simple Logging Facade for Java). Hope this helps.

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You either have manually organized imports, or asked Eclipse to do so every time you save your Java file.

This function expands *-imports to the individual classes needed. This helps avoiding ambiguity.

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At this situation, you can to add dependencies to org.slf4j.* packages, I think so. For example for Gradle:

compile 'log4j:log4j:1.2.17' compile 'org.slf4j:slf4j-api:1.7.5' compile 'org.slf4j:slf4j-log4j12:1.7.5'

More details here Gradle does not find dependencies