在使用maven新建的web项目中，执行
执行如上的这两个操作，报错：
1 [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile) on project bioligyInfo: Fatal error compiling: tools.jar not found: C:\Program Files\Java\jre1.8.0_73\..\lib\tools.jar -> [Help 1] 2 [ERROR] 3 [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. 4 [ERROR] Re-run Maven using the -X switch to enable full debug logging. 5 [ERROR] 6 [ERROR] For more information about the errors and possible solutions, please read the following articles: 7 [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException 8 9 10 11 12 13 [ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war (default-war) on project bioligyInfo: Error assembling WAR: webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode) -> [Help 1] 14 [ERROR] 15 [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. 16 [ERROR] Re-run Maven using the -X switch to enable full debug logging. 17 [ERROR] 18 [ERROR] For more information about the errors and possible solutions, please read the following articles: 19 [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException