(Struts2学习篇)Struts2数据校验-validate()方法实现

阳光穿透心脏的1/2处 2023-10-18 20:54 50阅读 0赞

第一步：编写相关Action

public class RegisterAction extends ActionSupport {
    
    	/**
    	 * 
    	 */
    	private static final long serialVersionUID = 1L;
    	// 相关参数封装
    	// 用户名
    	private String username;
    	// 密码
    	private String password;
    	// 年龄
    	private int age;
    	// 生日
    	private Date birthday;
    	// 相关处理结果
    	private String result;
    
    	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 getAge() {
    		return age;
    	}
    
    	public void setAge(int age) {
    		this.age = age;
    	}
    
    	public Date getBirthday() {
    		return birthday;
    	}
    
    	public void setBirthday(Date birthday) {
    		this.birthday = birthday;
    	}
    
    	public String getResult() {
    		return result;
    	}
    
    	public void setResult(String result) {
    		this.result = result;
    	}
    
    	// struts2的validate()方法校验相关数据信息
    	@Override
    	public void validate() {
    		// TODO Auto-generated method stub
    		// 校验用户名
    		if (username == null || username.equals("") || username.length() < 4
    				|| username.length() > 20) {
    			addFieldError("username", "用户名必须是字母和数字，且长度必须介于4和20之间");
    		}
    		// 校验密码
    		if (password == null || password.equals("") || password.length() < 6
    				|| password.length() > 20) {
    			addFieldError("password", "密码的长度必须介于6和20之间");
    
    		}
    		// 校验年龄
    		if (age <= 0 && age <= 200) {
    			addFieldError("age", "你必须输入一个有效的年龄");
    		}
    		// 校验出生日期
    		if (birthday == null) {
    			addFieldError("birthday", "出生日期必须输入");
    		} else {
    			// 设置日期最大
    			Calendar endDate = Calendar.getInstance();
    			// 设置日期最小
    			Calendar startDate = Calendar.getInstance();
    			startDate.set(1900, 1, 1);
    			if (birthday.after(endDate.getTime())
    					|| birthday.before(startDate.getTime())) {
    				addFieldError("birthday", "出生日期必须在一个有效范围内");
    			}
    
    		}
    
    	}
    
    	// struts2 的 execute() 方法
    	@Override
    	public String execute() throws Exception {
    		// TODO Auto-generated method stub
    		setResult("注册成功");
    		return SUCCESS;
    	}
    
    }

第二步：配置struts2.xml文件

<action name="register" class="com.rf.action.RegisterAction">
    	<result name="success">/error.jsp</result>
    	
    	<result name="input">/login.jsp</result>
    	</action>
    	</package>

第三步：编写相关页面文件

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <%@taglib prefix="s" uri="/struts-tags"%>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>    
        <title>struts2数据校验</title>
       
      </head>  
      <body>
     	   
     	   <s:form action="register">
     	   <s:textfield name="username" key="用户名"/>
     	    <s:textfield name="password" key="密码"/>
     	    <s:textfield name="age" key="年龄" />
     	    <s:textfield name="birthday" key="生日"/>
     	    <s:submit  value="注册"/>
     	   </s:form>
      </body>
    </html>

第四步：结果页面

结果显示：

![Center][]

结果：

![Center 1][]

[Center]: https://img-blog.csdn.net/20130724161904750?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhvdXpoaXdlbmdhbmc=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 1]: https://img-blog.csdn.net/20130724162107656?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhvdXpoaXdlbmdhbmc=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center