摘要：The transient modifier. A transient modifier applied to a field tells Java that this attribute should be excluded when the object is being serialized. 阅读全文

摘要：虽说这是一个很简单的问题, 但我今天碰到的时候竟然忘记了. 返回给前端的JSON格式是数型而非需求文档要求的字符串. 1. String.valueOf(param); 2. 空字符串,param+"" 阅读全文

摘要：I mapped Ctrl-Alt-Up/Down to open web-browser and email client but it didn't take effect. Ctrl-Alt-Up/Down still switch workspaces as the default sett 阅读全文

摘要：java.util.Properties The Properties class represents a persistent set of properties. The Properties can be saved to a stream or loaded from a stream. 阅读全文

摘要：一般红色叹号是build path出错. 除了检查出错的library外,还要注意Order an Export选项中未勾选的Library. 之前导入项目后,没有勾选JRE和Maven Dependencies 阅读全文

摘要：new BigDecimal(int i); BigDecimal.parseBigDecimal(String.valueOf(int i)); 阅读全文