第六次作业
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19242725b7
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29
java/com/beans/EmployeeBean.java
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29
java/com/beans/EmployeeBean.java
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package com.beans;
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public class EmployeeBean {
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private String eno = "";
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private String ename = "";
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private String ecompany = "";
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public EmployeeBean() {
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}
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public void setEno(String eno){
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this.eno = eno;
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}
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public void setEname(String ename){
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this.ename = ename;
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}
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public void setEcompany(String ecompany){
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this.ecompany = ecompany;
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}
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public String getEno(){
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return eno;
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}
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public String getEname(){
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return ename;
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}
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public String getEcompany(){
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return ecompany;
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}
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}
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59
java/com/control/EmployeeServlet.java
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59
java/com/control/EmployeeServlet.java
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package com.control;
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import java.io.*;
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import javax.servlet.*;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.*;
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import com.beans.EmployeeBean;
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//public class EmployeeServlet extends HttpServlet{
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// /**
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// *
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// */
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// private static final long serialVersionUID = 1L;
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//
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//public void doPost(HttpServletRequest request,
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//HttpServletResponse response)
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// throws ServletException,IOException{
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//
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// String eno = request.getParameter("eno");
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// String ename = request.getParameter("ename");
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// String ecompany = request.getParameter("ecompany");
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// EmployeeBean employee = new EmployeeBean();
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// employee.setEno(eno);
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// employee.setEname(ename);
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// employee.setEcompany(ecompany);
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//
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// request.setAttribute("employee", employee);
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// RequestDispatcher view =
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// request.getRequestDispatcher("/displayEmployee.jsp");
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// view.forward(request, response);
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// }
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//}
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@WebServlet("/employee")
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public class EmployeeServlet extends HttpServlet {
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private static final long serialVersionUID = 1L;
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@Override
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protected void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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// 获取表单参数
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String eno = request.getParameter("eno");
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String ename = request.getParameter("ename");
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String ecompany = request.getParameter("ecompany");
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// 封装为 EmployeeBean 对象
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EmployeeBean employee = new EmployeeBean();
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employee.setEno(eno);
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employee.setEname(ename);
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employee.setEcompany(ecompany);
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// 将 EmployeeBean 对象设置为请求属性
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request.setAttribute("employee", employee);
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// 转发到 displayEmployee.jsp
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RequestDispatcher view = request.getRequestDispatcher("/displayEmployee.jsp");
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view.forward(request, response);
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}
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}
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BIN
webapp/WEB-INF/lib/jstl.jar
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BIN
webapp/WEB-INF/lib/jstl.jar
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BIN
webapp/WEB-INF/lib/standard.jar
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BIN
webapp/WEB-INF/lib/standard.jar
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Binary file not shown.
9
webapp/displayEmployee.jsp
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9
webapp/displayEmployee.jsp
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<%@ page contentType="text/html;charset=gb2312"%>
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<html><body>
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雇员的信息如下：<br>
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<ul>
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<li>雇员号:${employee.eno}
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<li>雇员名:${employee.ename}
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<li>公司名:${employee.ecompany}
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</ul>
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</body></html>
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<html><body>
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<%@ page language="java" %>
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<%!
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int anInt = 3;
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boolean aBool = true;
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Integer anIntObj = new Integer(3);
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Float aFloatObj = new Float(8.6);
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String str = "some string";
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StringBuffer sBuff = new StringBuffer();
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public char getChar(){
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return 'A';
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}
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%>
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<%= 500 %>
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<%= anInt*3.5/100-500 %>
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<%= aBool %>
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<%= false %>
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<%= !false %>
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<%= getChar() %>
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<%= Math.random() %>
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<%= aFloatObj %>
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<%= aFloatObj.floatValue() %>
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<%= aFloatObj.toString() %>
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<%= aBool %>
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<% int i = 20; %>
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<% sBuff.setLength(12); %>
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</body></html>
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<%@ page contentType="text/html;charset=GB2312" %>
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<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
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<html>
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<head>
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<title>表达式相关的标签</title>
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</head>
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<body>
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<h2>使用<c:out value="<c:out> <c:set> <c:remove>" />的例子</h2>
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<hr>
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<c:set scope="page" var="number">
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<c:out value="${5}"/>
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</c:set>
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<br>
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<c:set scope="request" var="number">
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<c:out value="${15}"/>
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</c:set>
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<br>
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<c:set scope="session" var="number">
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<c:out value="${25}"/>
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</c:set>
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不同作用域的number变量的初始值</p>
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pageScope.number =<c:out value="${pageScope.number}" default="No Data" />
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<br>
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requestScope.number =<c:out value="${requestScope.number}"
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default="No Data" />
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<br>
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sessionScope.number =<c:out value="${sessionScope.number}"
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default="No Data" />
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<br>
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<p><c:out value='执行<c:remove var="number" />之后'/></p>
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<c:remove var="number" scope="request" />
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pageScope.number =<c:out value="${pageScope.number}"
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default="No Data" />
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<br>
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requestScope.number =<c:out value="${requestScope.number}"
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default="No Data" />
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<br>
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sessionScope.number =<c:out value="${sessionScope.number}"
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default="No Data" />
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<br>
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</body>
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</html>
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18
webapp/flowControl.html
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18
webapp/flowControl.html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title>JSTL中用于流程控制的标签</title>
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</head>
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<body>
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<h2>使用JSTL流程控制标签</h2>
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<p>请选择一个填入文本框中: Tom / Jerry / Mike / Ben</p>
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<form method="post" action="flowControl.jsp" accept-charset="UTF-8">
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<p>姓名：<input type="text" name="username" size="15" /></p>
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<p>
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<input type="submit" value="传送" />
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<input type="reset" value="清除" />
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</p>
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</form>
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</body>
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</html>
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38
webapp/flowControl.jsp
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38
webapp/flowControl.jsp
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<%@ page contentType="text/html;charset=GB2312" %>
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<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
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<html>
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<head>
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<title>JSTL中用于流程控制的标签</title>
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</head>
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<body>
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<h2>标签c:if的使用</h2>
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<c:if test="${param.username == 'Tom'}" var="condition" scope="session">
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您好,Tom
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</c:if>
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<c:if test="${param.username == 'Jerry'}" var="condition" scope="session">
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您好,Jerry
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</c:if>
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<c:if test="${param.username == 'Mike'}" var="condition" scope="session">
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您好,Mike
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</c:if>
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<c:if test="${param.username == 'Ben'}" var="condition" scope="session">
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您好,Ben
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</c:if>
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<h2>标签c:choose c:when c:otherwise使用</h2>
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<c:choose>
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<c:when test="${param.username == 'Tom'}">
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您好,Tom
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</c:when>
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<c:when test="${param.username == 'Jerry'}">
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您好,Jerry
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</c:when>
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<c:when test="${param.username == 'Mike'}">
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您好,Mike
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</c:when>
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<c:otherwise>
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您好,Ben
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</c:otherwise>
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</c:choose>
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</body>
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</html>
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<%@ page import="java.util.Date,java.text.DateFormat" %>
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<%@ page contentType="text/html;charset=gb2312" %>
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<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
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<html>
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<head><title>page指令示例</title></head>
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<head><title>Using URL JSTL</title></head>
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<body>
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<h3 align="center">使用page指令导入java.util.Date类</h3>
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<%
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Date date = new Date();
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String s = DateFormat.getDateInstance().format(date);
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String s2 = DateFormat.getDateInstance(DateFormat.FULL).format(date);
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%>
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<p align="center">现在的时间是：<%=s%></p>
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<p align="center">现在的时间是：<%=s2%></p>
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<h3>这是包含页面中的内容</h3>
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<c:import url="included.jsp" charEncoding = "gb2312">
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<c:param name="userName" value="Harry Porter" />
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</c:import>
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<br>
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</body>
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</html>
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</html>
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12
webapp/included.jsp
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12
webapp/included.jsp
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<%@ page contentType="text/html;charset=gb2312" %>
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<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
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<html>
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<head><title>Included Page</title></head>
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<body>
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<h3>这是被包含页面中的内容</h3>
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用户名：<c:out value="${param.userName}" />
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</body>
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</html>
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14
webapp/inputEmployee.jsp
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14
webapp/inputEmployee.jsp
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<%@ page contentType="text/html;charset=gb2312"%>
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<html>
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<body>
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请输入雇员信息:
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<form action="employee" method="post">
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<table>
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<tr><td>雇员号:</td><td><input type="text" name="eno"></td></tr>
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<tr><td>雇员名:</td><td><input type="text" name="ename"></td></tr>
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<tr><td>公司名:</td><td><input type="text" name="ecompany"></td></tr>
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</table>
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<input type="submit" value="提交">
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</form>
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</body>
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</html>
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11
webapp/jstl_test.jsp
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11
webapp/jstl_test.jsp
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<%@ page contentType="text/html;charset=gb2312" %>
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<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
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<html>
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<head><title>Using JSTL</title></head>
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<body>
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<c:out value="Welcome to using JSTL" />
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<br>
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Request Method:${pageContext.request.method}<br>
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Remote Address:${pageContext.request.remoteAddr}
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</body>
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</html>
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12
webapp/redirect_test.jsp
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12
webapp/redirect_test.jsp
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<%@ page contentType="text/html;charset=gb2312" %>
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<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
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<html>
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<head><title>Using Redirect Tag</title></head>
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<body>
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<h3>使用redirect标签</h3>
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<c:redirect url = "import_test.jsp">
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<c:param name = "userName" value = "哈里.波特" />
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</c:redirect>>
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<c:out value="该代码不会被执行" />
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</body>
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</html>
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