当我要冒这样的错误（使用-source 5或更高版本以启用注释）时

Question

When I am going to make war giving error like this (use -source 5 or higher to enable annotations);

see the image:

.

Answer 1

Are you using maven to build your war file? If this is the case you should check your projects .pom file to ensure you have set your java version correctly, within your build plugin.

<configuration>
  <source>1.7</source> 
  <target>1.7</target>
</configuration>