資源簡介
一個完整的用js寫的ajax例子,模仿注冊頁面輸入用戶名,輸入框失去焦點后,后臺異步判斷該用戶名是否可用,并在頁面顯示判斷結(jié)果

代碼片段和文件信息
package?com.byzx.ajax.dao;
import?java.util.List;
import?com.byzx.ajax.vo.User;
public?class?DBHelper?{
//?增刪改查
//?根據(jù)名字查用戶
public?User?findUserByName(String?uname){
String?sql?=?“select?*?from?user?where?uname=‘“?+?uname?+?“‘“;
List?users?=?DBUtils.findUser(sql);
return?users.size()==0?null:users.get(0);
}
public?static?void?main(String[]?args)?{
//?DBHelper?helper?=?new?DBHelper();
/*User?user?=?helper.findUserByName(“scott“);
System.out.println(user);*/
}
}
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????841??2018-09-08?10:58??ajaxjs\.classpath
?????文件???????1039??2018-09-18?17:13??ajaxjs\.project
?????文件????????503??2018-09-08?10:58??ajaxjs\.settings\.jsdtscope
?????文件????????364??2018-09-08?10:57??ajaxjs\.settings\org.eclipse.jdt.core.prefs
?????文件????????470??2018-09-18?17:13??ajaxjs\.settings\org.eclipse.wst.common.component
?????文件????????345??2018-09-08?10:58??ajaxjs\.settings\org.eclipse.wst.common.project.facet.core.xm
?????文件?????????49??2018-09-08?10:58??ajaxjs\.settings\org.eclipse.wst.jsdt.ui.superType.container
?????文件??????????6??2018-09-08?10:58??ajaxjs\.settings\org.eclipse.wst.jsdt.ui.superType.name
?????文件???????1239??2018-09-18?17:14??ajaxjs\build\classes\com\byzx\ajax\dao\DBHelper.class
?????文件????????383??2018-09-18?17:14??ajaxjs\build\classes\com\byzx\ajax\dao\DBInfo.class
?????文件???????3691??2018-09-18?17:14??ajaxjs\build\classes\com\byzx\ajax\dao\DBUtils.class
?????文件????????790??2018-09-18?17:14??ajaxjs\build\classes\com\byzx\ajax\service\BookService.class
?????文件???????1961??2018-09-18?17:14??ajaxjs\build\classes\com\byzx\ajax\servlet\RegisterServlet.class
?????文件????????408??2018-09-18?17:14??ajaxjs\build\classes\com\byzx\ajax\util\AjaxUtil.class
?????文件???????1663??2018-09-18?17:14??ajaxjs\build\classes\com\byzx\ajax\vo\User.class
?????文件????????565??2018-09-18?16:53??ajaxjs\src\com\byzx\ajax\dao\DBHelper.java
?????文件????????289??2018-09-08?11:06??ajaxjs\src\com\byzx\ajax\dao\DBInfo.java
?????文件???????2306??2018-09-08?11:09??ajaxjs\src\com\byzx\ajax\dao\DBUtils.java
?????文件????????438??2018-09-08?11:14??ajaxjs\src\com\byzx\ajax\service\BookService.java
?????文件???????1725??2018-09-18?16:53??ajaxjs\src\com\byzx\ajax\servlet\RegisterServlet.java
?????文件????????227??2018-09-18?16:55??ajaxjs\src\com\byzx\ajax\util\AjaxUtil.java
?????文件????????905??2018-09-08?11:06??ajaxjs\src\com\byzx\ajax\vo\User.java
?????文件????????727??2018-09-18?17:00??ajaxjs\user.sql
?????文件?????????39??2018-09-08?10:58??ajaxjs\WebContent\me
?????文件???????2549??2018-09-20?14:23??ajaxjs\WebContent\register.jsp
?????文件?????709922??2018-08-17?08:59??ajaxjs\WebContent\WEB-INF\lib\mysql-connector-java-5.1.7-bin.jar
?????文件????????719??2018-09-18?17:14??ajaxjs\WebContent\WEB-INF\web.xm
?????目錄??????????0??2018-09-25?11:25??ajaxjs\build\classes\com\byzx\ajax\dao
?????目錄??????????0??2018-09-25?11:25??ajaxjs\build\classes\com\byzx\ajax\service
?????目錄??????????0??2018-09-25?11:25??ajaxjs\build\classes\com\byzx\ajax\servlet
............此處省略25個文件信息
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