使用 Git 下载 Spring 源码 编译 for Eclipse
1、安装gradle，下载 http://www.gradle.org/downloads
配置环境变量GRADLE_HOME，配置PATH %GRADLE_HOME%/bin，cmd，gradle -v
2、spring4 用jdk8 下载 https://jdk8.java.net/download.html 配置环境变量
3、github 下载 https://windows.github.com/
4、groovy 下载 http://groovy-lang.org/download.html 配置环境变量
5、打开git shell，切换工作目录（跟linux命令基本一致）
输入：git clone https://github.com/SpringSource/Spring-framework.git
等着吧！
6、进入下载的Spring-framework的目录找import-into-eclipse.bat，运行，导入eclipse
7、进入Spring-framework的目录 运行： gradlew :eclipse (注意冒号前面的空格)，生成.classpath和.project
8、安装groovy插件，在eclipse的 Help -> Install New Software 中，添加groovy
下载： http://dist.springsource.org/milestone/GRECLIPSE/e4.4/
9、eclipse重启后，进入Spring-framework的目录 运行： gradlew :clean
10、如果需要编译，运行gradlew :build
等着吧，一个个编译还是要点时间的。
编译有点问题
* What went wrong:
Could not resolve all dependencies for configuration ':spring-tx:compile'.
> Could not find com.ibm.websphere:uow:6.0.2.17.
Searched in the following locations:
https://repo1.maven.org/maven2/com/ibm/websphere/uow/6.0.2.17/uow-6.0.2.17
.pom
https://repo1.maven.org/maven2/com/ibm/websphere/uow/6.0.2.17/uow-6.0.2.17
.jar
Required by:
org.springframework:spring-tx:4.2.0.BUILD-SNAPSHOT
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug
option to get more log output.
BUILD FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Could not resolve all dependencies for configuration ':spring-test:compile'.
> Could not find testng.jar (org.testng:testng:6.9.4).
Searched in the following locations:
https://repo.spring.io/libs-release/org/testng/testng/6.9.4/testng-6.9.4.j
ar
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug
option to get more log output.
BUILD FAILED
http://stackoverflow.com/questions/23564525/com-ibm-websphereuow6-0-2-17-not-found