调试小技巧
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1捕获输出try catch的error ，如果调试的时候，一般try catch捕捉的错误都会显示在控制台上。考虑到发布之后，通过日志形式记录，可以参考这种方法public static String getStackTrace(Exception e) { StringWriter writer = new StringWriter(); e.printStackTrace(new PrintWriter(writer,true)); return writer.toString();} 
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