struts表单属性简单标签

最新推荐文章于 2022-11-26 11:19:41 发布

原创最新推荐文章于 2022-11-26 11:19:41 发布 · 94 阅读

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文章标签：

#Struts #Bean #JSP #Apache #XML

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本文详细介绍了Struts2框架中的各种表单元素使用方法，包括文本输入框、密码框、单选按钮、复选框及下拉选择框等，并展示了如何从前端页面向后台传递数据。

 <body>
  	<h1>登录页面</h1>
  	<s:debug></s:debug>
    <s:form method="POST" action="login.action">
    	<s:bean name="com.zchen.model.User" id="u"></s:bean>
    	<s:bean name="com.zchen.action.FormAction" id="fa"></s:bean>
    	<s:textfield name="user.username" value="%{#u.username}" label="Username" required="true" requiredposition="right"></s:textfield>
    	<!--value:从后台取值填充 %{}动态从值栈 取 label：自动在名称后面加： required：必填项会自动出现* requiredposition:*号出现的位置（right or left） -->
    	<s:password name="user.password" label="Password"></s:password>
    	<s:radio list="#{1:'男',2:'女'}" name="user.sex"  label="性别" value="1"></s:radio>
    	<!-- value:默认选中项  list：可以从后台取 -->
    	<s:checkbox label="婚否" name="user.hf" value="true"></s:checkbox>
    	<!-- 此checkbook只有一个选项 value：true or false -->
    	<s:checkboxlist name="user.love" label="爱好" list="{'足球','篮球','排球','网球'}"></s:checkboxlist>
    	<s:checkboxlist name="user.love" label="爱好" list="#{1:'足球',2:'篮球',3:'排球',4:'网球'}"></s:checkboxlist>
    	<!-- 前者保存的是文字后者保存的是数字（一般用map保存数字的节省资源防止乱码） -->
    	<s:select list="#fa.provice" name="user.provice" label="籍贯" ></s:select>
    	<!-- 可以放在后台赋值 在后台新建一个Action 用<s:bean>接受 -->
    	<s:select list="#fa.provice" name="user.provice" label="籍贯" ></s:select>
    	<!-- 利用action的result给select赋值在struts.xml中配置action 注意的是不能直接访问此页面要先访问FormAction -->
    	<s:submit value="提交"></s:submit>
    </s:form>
  </body>

由于select标签利用了从后台去值,所以引入了:

package com.zchen.action;
import java.util.HashMap;
import java.util.Map;

import com.opensymphony.xwork2.ActionSupport;

public class FormAction extends ActionSupport {
 private static final long serialVersionUID = 4387832093273420762L;
 private Map<Integer,String> provice;
 
 public Map<Integer,String> getProvice() {
  return provice;
 }

 public void setProvice(Map<Integer,String> provice) {
  this.provice = provice;
 }

 public FormAction(){
  provice = new HashMap<Integer,String>();
  provice.put(1,"山东省");
  provice.put(2,"山西省");
  provice.put(3,"湖南省");
  provice.put(4,"湖北省");
  provice.put(5,"北京省");
  provice.put(6,"广东省");
  provice.put(7,"广西省");
  provice.put(8,"河南省");
  provice.put(9,"河北省");
  provice.put(10,"天津省");
  
 }
 @Override
 public String execute() throws Exception {
  return SUCCESS;
 }}

将值传给表单login.jsp页面的选择标签分两种情况：

1.利用bean属性；

2.配置action：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
	<package name="annotation" extends="struts-default">
		<action name="login" class="com.zchen.action.LoginAction" >
			<result name="success">index.jsp</result>
		</action>
		
		<action name="formAction" class="com.zchen.action.FormAction">
			<result>/login.jsp</result>
		</action>
	</package>
</struts>

package com.zchen.model;

public class User {
	
	private String username = "请在此填写用户名";
	private String password;
	private int sex;
	private String[] love;
	private boolean hf;
	private String provice;
	
	public String getProvice() {
		return provice;
	}
	public void setProvice(String provice) {
		this.provice = provice;
	}
	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 int getSex() {
		return sex;
	}
	public void setSex(int sex) {
		this.sex = sex;
	}
	public String[] getLove() {
		return love;
	}
	public void setLove(String[] love) {
		this.love = love;
	}
	public boolean isHf() {
		return hf;
	}
	public void setHf(boolean hf) {
		this.hf = hf;
	}


}

package com.zchen.action;



import com.opensymphony.xwork2.ActionSupport;
import com.zchen.model.User;

public class LoginAction extends ActionSupport {
	private static final long serialVersionUID = 4387832093273420762L;
	private User user = null;
	public User getUser() {
		return user;
	}
	public void setUser(User user) {
		this.user = user;
	}
	@Override
	public String execute() throws Exception {
		return SUCCESS;
	}


}

  <body>
    <s:property value="user.username"/><br>
     <s:property value="user.password"/><br>
      <s:property value="user.sex"/><br>
       <s:property value="user.love"/><br>
        <s:property value="user.hf"/><br>
         <s:property value="user.provice"/><br>
  </body>