For an existing Java project that is using the Simple Logging Facade for Java (SLF4J), replacing the logging framework is as simple as changing the project reference.

For example, if the existing project references slf4j-api-1.5.6.jar and slf4j-simple-1.5.6.jar, simply replace slf4j-simple-1.5.6.jar with logback-core-0.9.15.jar.

With the Logback View plugin installed in Eclipse, this has the effect of showing the logs in Eclipse as well.