老妪能解的讲解SSH2+JS实现重命名的判断 _JavaScript

通俗易懂的讲解SSH2+JS实现重命名的判断

本博客讲述如何利用js+ssh2实现重命名的判断，希望读者看完了博客能够将这个简单的小功能实现了。

首先建立一个添加系统的一个页面：

<%@ page contentType="text/html;charset=utf-8" language="java" import="java.sql.*" errorPage=""%> <% Stringpath = request.getContextPath(); StringbasePath = request.getScheme() + "://" +request.getServerName() + ":" + request.getServerPort() +path + "/"; %> <!DOCTYPE html PUBLIC "-//W3C//DTDXHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <base href="<%=basePath%>"/> <meta http-equiv="Content-Type"content="text/html; charset=utf-8" /> <title>权限管理</title> <link href="<%=basePath%>css/basePage.css"rel="stylesheet" type="text/css" /> <link href="<%=basePath%>css/baseStyle.css"rel="stylesheet" type="text/css" /> <link rel="stylesheet"type="text/css" href="<%=basePath%>css/addccStyle.css" /> <script src="<%=basePath%>/js/client_validate.js"type="text/javascript"></script> <script language="javascript"type="text/javascript"> function menu_click(page){ window.self.location= '<%=basePath%>' + page; } function _addbtn(){ var systemName =document.getElementById("systemName"); if (trim(systemName.value) == "") { alert("系统名称名称不能为空！"); systemName.focus(); return; } var myForm =document.forms[0]; myForm.action= "webSystemManager!addWebSystem"; myForm.submit(); } function _goback(){ window.self.location= "<%=basePath%>permission/sysmgr/system_add.jsp"; } function init() { var systemName =document.getElementById("systemName"); var s = '<%=request.getAttribute("system_isExist")%>'; if(s == "1"){ alert("该系统已经存在！"); systemName.focus(); systemName.value=""; return; } var res = "<%=request.getAttribute("addRes")%>"; if(res == 1){ alert("添加成功！"); systemName.focus(); systemName.value=""; return; } systemName.focus(); } </script> </head> <body menu='menu' onload="init()"> <div class="header"> <div class="header03"></div> <div class="header01"></div> <div class="header02">权限管理系统</div> </div> <div class="left" id="LeftBox"> <div class="left01"> <div class="left01_right"></div> <div class="left01_left"></div> <div class="left01_c">超级管理员：admin</div> </div> <div class="left02"> <div class="left02top"> <div class="left02top_right"></div> <div class="left02top_left"></div> <div class="left02top_c">基本信息维护</div> </div> <div class="left02down"> <div class="left02down01" onclick="menu_click('permission/usermgr/role_maint.jsp')">角色管理</div> <div class="left02down01" onclick="menu_click('permission/usermgr/group_maint.jsp')">用户组管理</div> <div class="left02down01" onclick="menu_click('permission/usermgr/user_maint.jsp')">用户管理</div> </div> <div class="left02top"> <div class="left02top_right"></div> <div class="left02top_left"></div> <div class="left02top_c">授权维护</div> </div> <div class="left02down"> <div class="left02down01" onclick="menu_click('permission/authoriedmgr/role_authoried_maint.jsp')">角色权限管理</div> <div class="left02down01" onclick="menu_click('permission/authoriedmgr/group_authoried_maint.jsp')">用户组权限管理</div> <div class="left02down01" onclick="menu_click('permission/authoriedmgr/user_authoried_maint.jsp')">用户权限管理</div> </div> <div class="left02top"> <div class="left02top_right"></div> <div class="left02top_left"></div> <div class="left02top_c">系统维护</div> </div> <div class="left02down" id="leftlast"> <div class="left02down01" onclick="menu_click('webSystemManager!getWebSystemByQueryString?pageNo=1&queryString=null')">系统管理</div> <div class="left02down01" onclick="menu_click('webPageManager!getWebPageByQueryString?pageNo=1&queryString=null')">页面管理</div> <div class="left02down01" onclick="menu_click('moduleManager!getModuleByQueryString?pageNo=1&queryString=null')">模块管理</div> <div class="left02down01" onclick="menu_click('operateManager!getOperateByQueryString?pageNo=1&queryString=null')">操作管理</div> </div> <div class="left03 left02top"> <div class="left03_right"></div> <div class="left01_left"></div> <div class="left03_c">安全退出</div> </div> </div> </div> <form id="addsystemform" method="post"> <div id="RightBox"> <div id="permission_header"> <div id="permission_guid"> 系统维护>>添加系统</div> <div id="split_line"> <hr /> </div> </div> <div id="operation_main"> <div id="select_guid">添加系统</div> <div id="prompt_select"> <span id="span_prompt">第二步（共两步）：</span>添加系统信息 </div> <div id="select_mothed"> <div class="guid_cc"> 系统名称：<input type="text" id="systemName" name="webSystem.name"/> </div> </div> <div id="btn_next"> <input type="button" class="operation_btn"name="btnReturn" id="btnReturn" value="返回" onclick="_goback()" /> <input type="button" class="operation_btn"name="btnAdd" id="btnAdd" value="添加" onclick="_addbtn()" /> </div> </div> <div id="permission_footer"> <div id="inner_footer"> <p class="copyright">Copyright © 2012 信息技术提高班.</p> </div> </div> </div> </form> </body> </html>

之后建立相应的Action：

public classWebSystemManagerAction extends ActionSupport { private WebSystem webSystem; @Resource privateIWebSystemManager<Long> webSystemManager; private HttpServletRequest request; private StringBuffer sbTreeHTML = new StringBuffer(); public WebSystemgetWebSystem() { return webSystem; } public void setWebSystem(WebSystemwebSystem) { this.webSystem = webSystem; } /** * 添加系统信息 * @return * @throws Exception */ public String addWebSystem() throws Exception { //先查找是否存在 int res = 0; res= webSystemManager.getWebSystemNameIsExist(webSystem.getName()); request = ServletActionContext.getRequest(); //若存在，group_isExist为1，若不存在group_isExist为0 request.setAttribute("system_isExist","0"); request.setAttribute("addRes",0); if(res > 0){ request.setAttribute("system_isExist","1"); }else{ webSystemManager.saveWebSystem(webSystem); request.setAttribute("addRes",1); } return "webSystemAdd"; }

bll层代码（这里仅仅写实现了）：

@Override public intgetWebSystemNameIsExist(String webSystemName) { int res = 0; WebSystemwebSystem = webSystemDao.findWebSystemByName(webSystemName); if(!BeanUtil.isNull(webSystem)){ res= 1; } return res; }

Dao层代码（这里也仅仅写实现）：

@Override public WebSystemfindWebSystemByName(String webSystemName) { baseDao.clearBaseDao(baseDao); baseDao.setEntityClass(WebSystem.class); Stringhql = "from WebSystem a where a.name=?"; IQueryquery = baseDao.createQuery(); query.setQueryString(hql); query.setParamValues(new Object[]{webSystemName}); WebSystemwebSystem=null; if(baseDao.find(query).size()>0 ){ webSystem= (WebSystem)baseDao.find(query).get(0); } return webSystem; }

之后配置相关信息：

Bll层配置：

Dao层配置：

Action配置：

<beanname="webSystemManagerAction" class="com.web.action.WebSystemManagerAction"scope="prototype"></bean>

最后就是struts2的相关配置：

<action name="webSystemManager" class="webSystemManagerAction"> <result name="webSystemAdd">/permission/sysmgr/system_add_addsystem.jsp</result> </action>

运行结果：

1：

2：

3：

通过这个小实例，相信大家一定会利用js+ssh2实现重命名的判断了，其实懂了这个其他的判断都会非常简单。其实最主要还是在那个init方法上，细心的读者会发现那个init方法的妙处。