首先从Apple Store下载Xcode，然后安装Xcode，接着安装Homebrew包管理，类似于Ubuntu下的apt-get: 终端下输入ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"最后在终端下输入：brew install wget就可以了转...

Caused by: java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/persistence/PersistenceContextType出现这个问题，找了半天是javaee-api.jar引入导致了这...

准备工具类：chekSumpackage net.tiantianup.commons.utils;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;/*** Created by LV on 2016/4/15 0015.* Email...