验证码效果\.classpath
..........\.mymetadata
..........\.project
..........\WebRoot\a.jsp
..........\.......\check.jsp
..........\.......\image.jsp
..........\.......\META-INF\MANIFEST.MF
..........\.......\WEB-INF\web.xml
..........\.......\.......\classes
..........\.......\.......\lib
..........\.......\META-INF
..........\.......\WEB-INF
..........\.myeclipse
..........\src
..........\WebRoot
验证码效果