Description: Java+ajax to write the login example, learning programming source code, a good reference.
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File list (Check if you may need any files):
JsonExampe
..........\.classpath
..........\.mymetadata
..........\.mystrutsdata
..........\.project
..........\src
..........\...\com
..........\...\...\yourcompany
..........\...\...\...........\struts
..........\...\...\...........\......\action
..........\...\...\...........\......\......\UserAction.java
..........\...\...\...........\......\ApplicationResources.properties
..........\WebRoot
..........\.......\addressbook.html
..........\.......\index.html
..........\.......\META-INF
..........\.......\........\MANIFEST.MF
..........\.......\prototype-1.4.0.js
..........\.......\restservice.jsp
..........\.......\test.jsp
..........\.......\WEB-INF
..........\.......\.......\.struts-config.mex
..........\.......\.......\classes
..........\.......\.......\.......\com
..........\.......\.......\.......\...\yourcompany
..........\.......\.......\.......\...\...........\struts
..........\.......\.......\.......\...\...........\......\action
..........\.......\.......\.......\...\...........\......\......\UserAction.class
..........\.......\.......\.......\...\...........\......\ApplicationResources.properties
..........\.......\.......\struts-bean.tld
..........\.......\.......\struts-config.xml
..........\.......\.......\struts-html.tld
..........\.......\.......\struts-logic.tld
..........\.......\.......\struts-nested.tld
..........\.......\.......\struts-tiles.tld
..........\.......\.......\validator-rules.xml
..........\.......\.......\web.xml