出了一个编码问题
Some characters cannot be mapped using 'ISO-8859-1 ' character encoding.
Either change the encoding or remove the characters which are not supported
by the 'IsO-8859-1 ' character encoding.
原来是编码，我按网上的
解决方法
eclipse --> window --> Preferences --> General --> Content Types --> Text --> 单击 Java Properties File 在底部出现 ;Default edcodng:',改成utf-8或GBK，然后update
还是不行，就照以前的方法把项目的编码改变，解决了
项目右键-属性-Resource-text file encoding下的other 选择改为utf-8就好了
