Java solution: The project cannot be built until build path errors are resolved, errorsresolved

Java solution: The project cannot be built until build path errors are resolved, errorsresolved

Reference: http://blog.csdn.net/marty_zhu/article/details/2566299

1. Check if project -- Build Automatically is checked? If not, clean it and restart eclipse.

2. check whether there is any unused jar package in your lib. check whether there is any wrong path in your. classpath file.

3. This is the most important point. check whether there are any error messages about this project in the problems view. This is generally the case: the project cannot be built until build path errors are resolved and then The following prompt is unbound classpath, which is generally in. delete these paths in classpath.

4. After installing Tomcat, make sure that the {tomcat_home}/common/lib folder contains jasper-runtime.jar, jsp-api.jar, servlet-api.jar, jndi. jar files. Start Eclipse. The first time you start Eclipse, there will be a configuration process. select window/preferences on the menu, select java/classpath variables, add JDK_TOOLS and point to your {jdk_home}/lib/tools. jar environment variable.