一、整体示意图
二、分析
1）添加管理员/修改管理员信息
1、addUser.jsp
[通过action跳转到adminServlet中。]
[当Id值存在时，为修改；当Id值不存在时，为注册]
<form role="form" class="form-horizontal"
action="${pageContext.request.contextPath}/admin/adminServlet?method=addUser&updateId=${updateBean.id }"
method="post" id="checkForm">
<!-- *********************************************** -->
<!-- *******************updateBean****************** -->
<!-- *******************当修改时，用的****************** -->
<!-- *********************************************** -->
<div class="form-group">
<label class="col-md-3 control-label" for="username">用户名</label>
<div class="col-md-9">
<input class ="form-control" name="username" type="text" id="username"
placeholder="Username" value="${updateBean.username }" />
</div>
</div>
<div class="form-group">
<label class ="col-md-3 control-label"for="inputPassword">密码</label>
<div class="col-md-9">
<input type ="password"name="password" class="form-control"
id="inputPassword" placeholder="Password"
value="${updateBean.password }">
</div>
</div>
<div class="form-group">
<label class ="col-md-3 control-label"for="password2">确认密码</label>
<div class="col-md-9">
<input type ="password"name="password2" class="form-control"
id="password2" placeholder="conformPassword">
</div>
</div>
<div class="form-group"></div>
<div class="form-group">
<div class ="col-md-offset-3col-md-9">
<button type ="submit" class="btn btn-primary btn-block">
提交
</button>
</div>
</div>
<c:if test="${param.status.equals(‘1‘)}">
<div class ="alert alert-danger"role="alert">添加成功</div>
</c:if>
<c:if test="${param.status.equals(‘2‘)}">
<div class ="alert alert-danger"role="alert">该用户已存在</div>
</c:if>
<c:if test="${param.status.equals(‘3‘)}">
<div class ="alert alert-danger"role="alert">成功</div>
</c:if>
</form>
2、adminServlet.java
//添加用户/修改用户信息
private void addUser(HttpServletRequest req, HttpServletResponse resp) throws ServletException,IOException
{
// TODO Auto-generated method stub
req.setCharacterEncoding("utf-8");
//************************update**********************
String updateId = req.getParameter("updateId");
//****************************************************
AdminDao adminDao = new AdminDao();
String username =req.getParameter("username");
String password =req.getParameter("password");
AdminBean adminBean = new AdminBean();
adminBean.setUsername(username);
String salt=StringUtil.getRandomString(10);
//设置盐值
String md5Pwd= MD5.GetMD5Code(MD5.GetMD5Code(password)+salt);
//将加密的密码和盐值再加密设为数据库中的密码
adminBean.setSalt(salt);
adminBean.setPassword(md5Pwd);
SimpleDateFormat createDate1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
adminBean.setCreateDate(createDate1.format(new Date()));
//************************传过来的id值 （updateId）为空时，为添加用户，不为空修改**********************
if(!updateId.equals(""))
{
//不为空——修改
int id = StringUtil.StringToInt(updateId);
adminBean.setId(id);
boolean flag = true;
if(!(username.equals(adminDao.getById(id).getUsername())))
{
//用户名与库里的不相等时，flag为true
flag=adminDao.checkReg(username);
}
if(flag)
{
adminDao.update(adminBean);
resp.sendRedirect("adminServlet?method=list&status=2");
//修改
}
else
{
resp.sendRedirect("addUser.jsp?status=2");
//用户已存在
}
}
else
{
//为空——注册
boolean flag = adminDao.checkReg(username);
if(flag)
{
//注册成功，写入数据库
adminDao.save(adminBean);
resp.sendRedirect("addUser.jsp?status=1");
}
else
{
//失败，跳回
resp.sendRedirect("addUser.jsp?status=2");
}
}
}
2）查看管理员信息（修改、删除、分页）
2.1 修改、删除
1.listUsers.jsp
[修改-->adminServlet 中toUpdate方法]
[删除-->adminServlet 中delete方法]
<table class ="table table-striped">
<tr>
<td>id</td>
<td>username</td>
<td>password</td>
<td>salt</td>
<td align ="center" colspan="2">操作</td>
</tr>
<!-- forEach遍历出adminBeans -->
<c:forEach items="${adminBeans}" var="item" varStatus="status">
<tr>
<td>${item.id}</td>
<td><a>${item.username}</a></td>
<td>${item.password}</td>
<td>${item.salt}</td>
<td><a href="${pageContext.request.contextPath}/admin/adminServlet?method=toUpdate&id=${item.id}">修改</a></td>
<td><a href="${pageContext.request.contextPath}/admin/adminServlet?method=delete&id=${item.id}">删除</a></td>
</tr>
</c:forEach>
</table>
2.adminServlet.java
[修改-->adminServlet 中toUpdate方法]
private void toUpdate(HttpServletRequest req, HttpServletResponse resp) throws ServletException,IOException {
// TODO Auto-generated method stub
req.setCharacterEncoding("utf-8");
int id=StringUtil.StringToInt(req.getParameter("id"));
if(id>1)
{
AdminDao adminDao = new AdminDao();
AdminBean adminBean=adminDao.getById(id);
req.setAttribute(Constants.SESSION_UPDATE_BEAN, adminBean);
req.getRequestDispatcher("addUser.jsp").forward(req, resp);
}
else if(id==1)
{
resp.sendRedirect(req.getContextPath()+"/admin/adminServlet?method=list&status=1");
}
else
{
resp.sendRedirect(req.getContextPath()+"/admin/adminServlet?method=list&status=2");
}
}
[删除-->adminServlet 中delete方法]【无提示！！！】
private void delete(HttpServletRequest req, HttpServletResponse resp) throws ServletException,IOException {
// TODO Auto-generated method stub
req.setCharacterEncoding("utf-8");
int id=StringUtil.StringToInt(req.getParameter("id"));
if(id>1)
{
AdminDao adminDao = new AdminDao();
adminDao.delete(id);
resp.sendRedirect(req.getContextPath()+"/admin/adminServlet?method=list&status=3");
}
else if(id==1)
{
resp.sendRedirect(req.getContextPath()+"/admin/adminServlet?method=list&status=1");
}
else
{
resp.sendRedirect(req.getContextPath()+"/admin/adminServlet?method=list&status=2");
}
}
2.2 分页
1.listUsers.jsp
[pagingBean 相关量的集合 set get部分]
<div>
<util:page pagingBean ="${pagingBean}"/>
</div>
2.adminServlet.java
[list-->adminServlet]
[其中设置了pagingBean中的当前页显示的条数 （在Constants中有设置）]
//查看/列举管理员
private void listUsers(HttpServletRequest req, HttpServletResponse resp) throws ServletException,IOException {
// TODO Auto-generated method stub
req.setCharacterEncoding("utf-8");
String status=req.getParameter("status");
AdminDao adminDao = new AdminDao();
int currentPage=StringUtil.StringToInt(req.getParameter("currentPage"));
int countSize = adminDao.getCount();
PagingBean pagingBean =new PagingBean(currentPage,countSize,Constants.PAGE_SIZE_1);
List<AdminBean> adminBeans = adminDao.getListByPage(currentPage * Constants.PAGE_SIZE_1,Constants.PAGE_SIZE_1);
pagingBean.setPrefixUrl(req.getContextPath()+"/admin/adminServlet?method=list");
pagingBean.setAnd(true);
req.setAttribute(Constants.SESSION_ADMIN_BEANS, adminBeans);
req.setAttribute("pagingBean", pagingBean);
if(status!=null)
{
req.getRequestDispatcher("listUsers.jsp?status="+status).forward(req, resp);
}
else
{
req.getRequestDispatcher("listUsers.jsp").forward(req, resp);
}
}
3.PageTag.java
[分页函数的具体实现]
public void doTag() throws JspException, IOException {
// TODO Auto-generated method stub
//super.doTag();
StringBuffer sb =new StringBuffer();
if(pagingBean!=null)
{
sb.append("<nav><ul class=‘pagination‘>");
if(pagingBean.getCurrentPage()<=0)
{
sb.append("<li class=‘disabled‘><a>首页</a></li>");
sb.append("<li class=‘disabled‘><a href=‘#‘>上一页</a></li>");
}
else
{
sb.append("<li><a href=‘").append(pagingBean.getPrefixUrl()).append("‘aria-label=‘Previous‘><span aria-hidden=‘true‘>首页</span></a></li>");
sb.append("<li><a href=‘").append(pagingBean.getPrefixUrl()).append(pagingBean.isAnd()?"&":"?").append("currentPage=").append(pagingBean.getCurrentPage()-1).append("‘>上一页</a></li>");
}
if(pagingBean.getCurrentPage()>=(pagingBean.getPageCount()-1))
{
sb.append("<li class=‘disabled‘><a>下一页</a></li>");
sb.append("<li class=‘disabled‘><a>尾页</a></li>");
}
else
{
sb.append("<li><a href=‘").append(pagingBean.getPrefixUrl()).append(pagingBean.isAnd()?"&":"?").append("currentPage=").append(pagingBean.getCurrentPage()+1).append("‘>下一页</a></li>");
sb.append("<li><a href=‘").append(pagingBean.getPrefixUrl()).append(pagingBean.isAnd()?"&":"?").append("currentPage=").append(pagingBean.getPageCount()-1).append("‘aria-label=‘Previous‘><span aria-hidden=‘true‘>尾页</span></a></li>");
}
sb.append("<li><a href=‘#‘>");
sb.append("<span>");
sb.append(pagingBean.getCurrentPage()+1);
sb.append("/");
sb.append(pagingBean.getPageCount());
sb.append("</span>");
sb.append("</a>");
sb.append("</li>");
sb.append("</ul></nav>");
}
getJspContext().getOut().write(sb.toString());
}
三、分享
链接：http://pan.baidu.com/s/1gfbzodX 密码：qitj
时间： 2025-01-09 06:24:41