EL标签的简单应用
在MyEclipse 下 Web Project 简单EL标签的使用:在 Struts 框架下：
Test_EL.java
package com.classes;public class Test_EL {privateString username;privateString password;privateint age;privateString sex;public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}}
TestForm.java
package com.el.struts.form;import javax.servlet.http.HttpServletRequest;import org.apache.struts.action.ActionErrors;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionMapping;public class TestForm extends ActionForm {private String username;private String password;public ActionErrors validate(ActionMapping mapping,HttpServletRequest request) {// TODO Auto-generated method stubreturn null;}public void reset(ActionMapping mapping, HttpServletRequest request) {// TODO Auto-generated method stub}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;}}
TestAction.java
package com.el.struts.action;import java.util.ArrayList;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.Action;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;import com.classes.Test_EL;import com.el.struts.form.TestForm;public class TestAction extends Action {public ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) {TestForm testForm = (TestForm) form;// TODO Auto-generated method stubrequest.setAttribute("name", "name_zhao");Test_EL test_el=new Test_EL();test_el.setUsername("zhao");test_el.setPassword("password1");test_el.setAge(1);test_el.setSex("男");Test_EL test_e=new Test_EL();test_e.setUsername("zhao");test_e.setPassword("password1");test_e.setAge(2);test_e.setSex("女");request.getSession().setAttribute("test_el",test_el);List list=new ArrayList();list.add(test_el);list.add(test_e);request.setAttribute("list", list);return mapping.findForward("test11");}} test.jsp
<%@ page language="java"%><%@ taglib uri="/WEB-INF/c.tld" prefix="c"%><%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%> <%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%><!--jsp:useBean id="test_el" scope="page" class="com.classes.Test_EL"/--><html> <head><title>JSP for TestForm form</title></head><body><html:form action="test">username : <html:text property="username"/><html:errors property="username"/><br/>password : <html:password property="password"/><html:errors property="password"/><br/><html:submit/><html:cancel/></html:form><table><tr> <td> ${test_el.username} </td></tr><tr> <td> ${test_el.password} </td></tr><tr> <td> ${test_el.age} </td></tr><tr> <td> ${test_el.sex} </td></tr><tr> <td> <c:if test="${name!=null}" var="t"> wo shi shi wo ! </c:if> </td></tr><tr> <td> <c:forEach items="${list}" var="tag" varStatus="id"> ${id.count} ++${tag.username }++aaaa<br> ${id.index} ++${tag.password }++aaaa<br> ${id.first} ++${tag.age }++aaaa<br> ${id.last} ++${tag.sex }++aaaa<br> </c:forEach> </td></tr><tr> <td> <c:out value="name_cou"></c:out> </td></tr></table></body></html>
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