* 升级依赖包的版本：
      spring                3.1.2   -> 3.2.4
      slf4j                 1.6.6   -> 1.7.5
      commons-fileupload    1.2.2   -> 1.3
      commons-io            2.3     -> 2.4
      commons-codec         1.6     -> 1.8
      fastjson              1.1.23  -> 1.1.36
      logback               1.0.6   -> 1.0.13   [provided]
      commons-logging       1.1.1   -> 1.1.3    [provided]
      servlet               3.0.1   -> 3.1.0    [provided]
      javamail              1.4.1   -> 1.4.7    [provided]
      activation            1.1     -> 1.1.1    [provided]
      freemarker            2.3.19  -> 2.3.20   [provided]
      groovy                1.8.6   -> 2.1.7    [runtime]
      httpunit              1.7     -> 1.7.2    [test]
      xerces                2.10.0  -> 2.11.0   [test]
      easymock              3.1     -> 3.2      [test]
      jasper                6.0.35  -> 6.0.37   [test]
      mock-javamail         1.7     -> 1.9      [test]