day11-mytag&jst&i18nの代码学习2

忘是亡心i 2022-08-07 05:51 110阅读 0赞

# day11-mytag&jst&i18nの代码学习2 #

## jstl ##

### User.java（后面的jsp中的jstl要用到) ###

package com.itheima.domain;
    
    import java.io.Serializable;
    
    public class User implements Serializable {
        private String username;
        private String password;
        private String gender;
        private int age;
    
        public User(String username, String password, String gender, int age) {
            super();
            this.username = username;
            this.password = password;
            this.gender = gender;
            this.age = age;
        }
    
        public User() {
            super();
        }
    
    
    
        @Override
        public String toString() {
            return "User [username=" + username + ", password=" + password
                    + ", gender=" + gender + ", age=" + age + "]";
        }
    
        public String getUsername() {
            return username;
        }
        public void setUsername(String username) {
            this.username = username;
        }
        public String getPassword() {
            return password;
        }
        public void setPassword(String password) {
            this.password = password;
        }
        public String getGender() {
            return gender;
        }
        public void setGender(String gender) {
            this.gender = gender;
        }
        public int getAge() {
            return age;
        }
        public void setAge(int age) {
            this.age = age;
        }
    
    
    }

### 06myforEach.jsp ###

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="myc" %>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <title></title>
        <meta http-equiv="pragma" content="no-cache">
        <meta http-equiv="cache-control" content="no-cache">
        <meta http-equiv="expires" content="0">    
          </head>
      <body>
         <%
             List list = new ArrayList();
             list.add("ddd");
             list.add("aj");
             list.add("cgx");
    
             request.setAttribute("list", list);
    
             //将来上面的内容，放在Servlet中，request域中，   然后再转发
          %>
          
          <myc:forEach items="${requestScope.list }"  var="vvv">
                ${pageScope.vvv }<br>
          </myc:forEach>
    
    
          <h2>输出Map集合</h2>
          <%
            Map map = new HashMap();
            map.put("a1","ddd");
            map.put("a2","cgx");
    
             request.setAttribute("map", map);
    
             //将来上面的内容，放在Servlet中，request域中，   然后再转发
          %>
            <myc:forEach items="${requestScope.map }"  var="vvv">
                ${pageScope.vvv }---------------${vvv.key }=====${vvv.value }<br>
          </myc:forEach>
    
          <h2>输出数组中的元素</h2>
    
          <%
            int a[] = {12,34,56,78};
            request.setAttribute("a", a);
           %>
           <myc:forEach items="${requestScope.a }"  var="vvv">
                ${pageScope.vvv }<br>
          </myc:forEach>
          <h2>输出对象数组中的元素</h2>
    
          <%
            String str[] = {"aaa","cgx","金瓶梅"};
            request.setAttribute("str", str);
           %>
           <myc:forEach items="${requestScope.str }"  var="vvv">
                ${pageScope.vvv }<br>
          </myc:forEach>
    
    
    
      </body>
    </html>

### 07forEach.jsp ###

<%@ page language="java" import="java.util.*,com.itheima.domain.User" pageEncoding="UTF-8"%>
    <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <title></title>
        <meta http-equiv="pragma" content="no-cache">
        <meta http-equiv="cache-control" content="no-cache">
        <meta http-equiv="expires" content="0">  
        <style type="text/css">
            .odd{
                background:#f3c3f3;
            }
            .even{
                background:#c3f3c3;
            }
        </style>  
          </head>
      <body>
         <%
             List list = new ArrayList();
             list.add("ddd");
             list.add("aj");
             list.add("cgx");
    
             request.setAttribute("list", list);
    
             //将来上面的内容，放在Servlet中，request域中，   然后再转发
          %>
          
          <c:forEach items="${requestScope.list }"  var="vvv">
                ${pageScope.vvv }<br>
          </c:forEach>
    
    
          <h2>输出Map集合</h2>
          <%
            Map map = new HashMap();
            map.put("a1","ddd");
            map.put("a2","cgx");
    
             request.setAttribute("map", map);
    
             //将来上面的内容，放在Servlet中，request域中，   然后再转发
          %>
            <c:forEach items="${requestScope.map }"  var="vvv">
                ${pageScope.vvv }---------------${vvv.key }=====${vvv.value }<br>
          </c:forEach>
    
          <h2>输出数组中的元素</h2>
    
          <%
            int a[] = {12,34,56,78};
            request.setAttribute("a", a);
           %>
           <c:forEach items="${requestScope.a }"  var="vvv">
                ${pageScope.vvv }<br>
          </c:forEach>
          <h2>输出对象数组中的元素</h2>
    
          <%
            String str[] = {"aaa","cgx","金瓶梅"};
            request.setAttribute("str", str);
           %>
           <c:forEach items="${requestScope.str }"  var="vvv">
                ${pageScope.vvv }<br>
          </c:forEach>
    
    
          <h2>扩展的属性   begin代表开始值  end代表结束值  var代表的是每个取值   step:代表每次增长多少</h2>
          <c:forEach begin="1" end="10" var="i">
                <a href="http://www.itheima.com?pageNo=${i }">${i }</a>     
          </c:forEach>
    
          
          <select>
                 <c:forEach begin="1" end="10" var="i" step="2">
                    <option value="${i }">${i }</option>
                 </c:forEach>
          </select>
    
          
         <h2>使用forEach,将一个List集合中的User对象的每个属性输出</h2>
         <%
            List myusers = new ArrayList();
            myusers.add(new User("邓丹丹","123","女",22));
            myusers.add(new User("俊俊","jj","男",18));
            myusers.add(new User("小凤","xf","女",18));
            myusers.add(new User("小楠","456","女",16));
            myusers.add(new User("丽哥","lg","女",25));
    
            pageContext.setAttribute("myusers", myusers,PageContext.REQUEST_SCOPE);
          %>
    
          <table border="1" width="600" align="center">
                <tr>
                    <th>序号</th>
                    <th>姓名</th>
                    <th>密码</th>
                    <th>性别</th>
                    <th>年龄</th>
                    <th>操作</th>
                </tr>
                
                <c:forEach items="${requestScope.myusers }" var="user" varStatus="vs">
                        <tr class="${vs.count%2==0?'even':'odd' }">
                            <td>${vs.count }</td>
                            <td>${user.username }</td>
                            <td>${user.password }</td>
                            <td>${user.gender }</td>
                            <td>${user.age }</td>
                            <td><a href="">删除</a><a href="">修改</a></td>
                       </tr>
                </c:forEach>
          </table>
      </body>
    </html>

### 08if.jsp ###

### 09setout.jsp ###

### 10catch.jsp ###

### 11getValue.jsp ###