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2019-02-06 01:54:52 1.3k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

储能逆变器动态无功补偿：从原理到算法实现本文深入解析了储能逆变器动态无功补偿的核心原理与算法实现。通过四象限运行与解耦控制技术，储能逆变器可在充放电的同时，快速、精准地调节无功功率，有效提升电网电能质量与功率因数。文章详细阐述了从相位调节、容量限制到PI控制算法的完整技术路径，并结合工程实践，探讨了其在光伏/储能系统中的协同控制策略与进阶应用价值。阅读详情

大神帮看看是什么问题

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基于Landsat-8数据的山西省吕梁市地表温度反演研究过程（大气校正法） 1.数据下载：本实验采用的数据是 ①从地理空间数据云下载的来自landsat8 卫星，云量<=1%,时间为2017年5月12日的山西省吕梁市影像数据。为全面覆盖吕梁市，选用了两片影像。 ②吕梁市边界矢量图 2.数据预处理 ... 阅读详情

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qq_39936465 2019-02-12

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我测试下来
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/LoginServlet</url-pattern>
</servlet-mapping>

这样写是无法通过tomcat9.0部署的，
web改为
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/111/LoginServlet</url-pattern>
</servlet-mapping>

action相应改一下测试可以正常运行
<FORM name="loginform" method="post" action="111/LoginServlet?opType=login">

qq_39936465 2019-02-11

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路径问题吧
web.xml 把loginServlet路径改下面试试。

<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/healthy/LoginServlet</url-pattern>
</servlet-mapping>

陆之昂i 2019-02-06

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<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:web="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>AdminServlet</servlet-name> <servlet-class>lx.servlet.AdminServlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>UserServlet</servlet-name> <servlet-class>lx.servlet.UserServlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>LoginServlet</servlet-name> <servlet-class>lx.servlet.LoginServlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>SysServlet</servlet-name> <servlet-class>lx.servlet.SysServlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>ExamServlet</servlet-name> <servlet-class>lx.servlet.ExamServlet</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>FormServlet</servlet-name> <servlet-class>lx.servlet.FormServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>AdminServlet</servlet-name> <url-pattern>/AdminServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>UserServlet</servlet-name> <url-pattern>/UserServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>LoginServlet</servlet-name> <url-pattern>/LoginServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>SysServlet</servlet-name> <url-pattern>/SysServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>ExamServlet</servlet-name> <url-pattern>/ExamServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>FormServlet</servlet-name> <url-pattern>/FormServlet</url-pattern> </servlet-mapping> </web-app>

陆之昂i 2019-02-06

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<FORM name="loginform" method="post" action="LoginServlet?opType=login"> <table width="100%" border="0" align="center" cellpadding="4" cellspacing="0" class="rtable"> <tbody> <tr class="tr1"> <td class="rldatee daslist"></td> <td class="rltitle daslist"> 系统用户登录</td> </tr> <tr class="tr1"> <td class="rldatee daslist">登录帐号：</td><input type=hidden name=method value="one"/> <td class="rltitle dotlist"><input type="text" size="30" name="username" required /></td> </tr> <tr class="tr1"> <td class="rldatee daslist">登录密码：</td> <td class="rltitle dotlist"><input type="password" size="30" name="password" required /></td> </tr> <tr class="tr1"> <td class="rldatee daslist">用户身份：</td> <td class="rltitle dotlist"> <input type="radio" name="usertype" value="用户" > 用户 <input type="radio" name="usertype" value="管理员" checked> 管理员</td> </tr> <tr class="tr1"> <td class="rldatee daslist"></td> <td class="rltitle daslist"><input type="submit" value="点击登录" style="width:80px;" /> </td> </tr> <tr class="tr1"> <td class="rldatee daslist"></td> <td class="rltitle daslist"> </td> </tr> </tbody> </table> </FORM>

陆之昂i 2019-02-06

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public class LoginServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String opType = request.getParameter("opType"); if (opType.equals("login")) { // 获取前端页面传递过来的参数值 request.setCharacterEncoding("utf-8"); String username = request.getParameter("username"); String password = request.getParameter("password"); String usertype = request.getParameter("usertype"); HttpSession session = request.getSession(); if (usertype.equals("管理员")) { ManagerDao managerdao = new ManagerDao(); Manager admin = managerdao.login(username, password); if(admin!=null) { //登录成功，保存用户会话信息，把用户登录信息保存起来，方便身份验证 session.setAttribute("admin", admin); session.setAttribute("usertype", usertype); request.getRequestDispatcher("admin/index.jsp").forward(request, response); }else { request.setAttribute("message", "登录信息错误！"); request.getRequestDispatcher("index.jsp").forward(request, response); } } else if (usertype.equals("用户")) { UserDao userdao = new UserDao(); User user = userdao.login(username, password); if(user!=null) { //登录成功，保存用户会话信息，把用户登录信息保存起来，方便身份验证 session.setAttribute("user", user); session.setAttribute("usertype", usertype); request.getRequestDispatcher("admin/lr/index.jsp").forward(request, response); }else { request.setAttribute("message", "登录信息错误！"); request.getRequestDispatcher("index.jsp").forward(request, response); } } } } }

tbywt 2019-02-06

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贴的图片看不清楚，最好贴代码

登录跳转不了页面

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