maven构建的spring项目，总是报错org.springframework.web.context.ContextLoaderListener，还有一个
At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs
重新maven update了也没用，clean之后重新build也不行，后来查了一下，说是lib没有引，
第一步，项目点击右键 点击 Properties 选择Deployment Assembly 再点击右边的Add按钮 选择Java Build Path Entries后点击Next按钮 然后选择你的Maven Dependencies 确定，没好用，还是报错，hashmap竟然告诉我没有这类，
第二步，项目点击右键 点击 Properties 选择java compiler,取消右侧use compliance........的对号，然后选择正确的jre版本，到此解决了