http://blog.csdn.net/u014749862/article/details/48894409
spring:http://maven.springframework.org/release/org/springframework/spring/
jackson:http://repo1.maven.org/maven2/com/fasterxml/jackson/core/ (为实现前后台传递json数据)
commons logging:http://commons.apache.org/proper/commons-logging/download_logging.cgi
JSTL:http://archive.apache.org/dist/jakarta/taglibs/standard/binaries/
导入的包如下图所示: