摘要：javax.imageio.IIOException: Can't create cache file! at javax.imageio.ImageIO.createImageInputStream(ImageIO.java:361) at javax.imageio.ImageIO.read(I 阅读全文

摘要：示例：String str = "你好/啊/";1、使用正则表达式replaceFirst(regex, string)str = str.replaceFirst("/$", "");str = str.replaceAll("/$", ""); 2、使用substring截取if(str.end 阅读全文

摘要：举例：a,b为对象BeanUtils.copyProperties(a, b)1、BeanUtils是org.springframework.beans.BeanUtils时，a拷贝到b2、BeanUtils是org.apache.commons.beanutils.BeanUtils时，b拷贝到a 阅读全文