struts2学习笔记七（第7讲.Struts2的输入校验续二）

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JSP Struts XML HTML

Struts2的输入校验续二
主要介绍addActionError的用法：
一、修改com.test.action下的RegisterAction.java类（把addFieldError改成addActionError）：

package com.test.action;

import java.util.Calendar;
import java.util.Date;

import com.opensymphony.xwork2.ActionSupport;

public class RegisterAction extends ActionSupport {
	
	private String username;
	
	private String password;
	
	private String repassword;
	
	private int age;
	
	private Date birthday;
	
	private Date graduation;

	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 getRepassword() {
		return repassword;
	}

	public void setRepassword(String repassword) {
		this.repassword = repassword;
	}

	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 Date getGraduation() {
		return graduation;
	}

	public void setGraduation(Date graduation) {
		this.graduation = graduation;
	}

	@Override
	public String execute() throws Exception {
		
		return SUCCESS;
	}

	@Override
	public void validate() {
		
		if(null == username || username.length() < 6 || username.length() > 10){
			this.addActionError("username invalid");
		}
		if(null == password || password.length() <6 || password.length() > 10){
			this.addActionError("password invalid");
		}
		else if(null == repassword || repassword.length() < 6 || repassword.length() > 10){
			this.addActionError("repassword invalid");
		}
		else if(!password.equals(repassword)){
			this.addFieldError("password", "two passwords not the same");
		}
		if(age <= 0 || age > 150){
			this.addActionError("age should be between 1 and 150");
		}
//		if(null == birthday){
//			this.addFieldError("birthday", "birthday invalid");
//		}
//		if(null == graduation){
//			this.addFieldError("graduation", "graduation invalid");
//		}
		if(null != birthday && null != graduation){
			Calendar c1 = Calendar.getInstance();
			c1.setTime(birthday);
			
			Calendar c2 = Calendar.getInstance();
			c2.setTime(graduation);
			
			if(!c1.before(c2)){
				this.addActionError("birthday should be before graduation");
			}
		}
	}
}

struts2标签能自动的显示错误信息，但是只局限于addFieldError级别的，当使用addActionError的时候就不能自动的显示错误的提示信息了。
二、需要在标签页面register2.jsp里面添加一个标签<s:actionerror/>：

 <body>
  	
  	<s:actionerror cssStyle="color:red"/>
    
    <s:form action="register">
    	
    	<s:textfield name="username" label="username"></s:textfield>
    	<s:password name="password" label="password"></s:password>
    	<s:password name="repassword" label="repassword"></s:password>
    	<s:textfield name="age" label="age"></s:textfield>
    	<s:textfield name="birthday" label="birthday"></s:textfield>
    	<s:textfield name="graduation" label="graduation"></s:textfield>
    	<s:submit value=" submit "></s:submit>
    	
    </s:form>
    
  </body>

结果如下：

当年龄输入的为字母型的字符串时，验证如下图：

会出现验证重复的现象：
三、要修改注册页面register.jsp的标签格式：

  <body>
  
  	<table align="center" width="40%">
		<tr>
			<td>
				<s:actionerror cssStyle="color:red"/>
			</td>
		</tr>
	</table>
  	
    <s:form action="register" theme="simple">
    	<table align="center" width="40%" border="1">
    		<tr>
    			<td>username
    			</td>
    			<td>
    				<s:textfield name="username" label="username"></s:textfield>
    			</td>
    		</tr>
    		<tr><td>password</td>
    			<td>
    				<s:password name="password" label="password"></s:password>
    			</td>
    		</tr>	
    		<tr><td>repassword</td>
    			<td>
    				<s:password name="repassword" label="repassword"></s:password>
    			</td>
    		</tr>
    		<tr><td>age</td>
    			<td>
    				<s:textfield name="age" label="age"></s:textfield>
    			</td>
    		</tr>
    		<tr><td>birthday</td>
    			<td>
    				<s:textfield name="birthday" label="birthday"></s:textfield>
    			</td>
    		</tr>
    		<tr><td>graduation</td>
    			<td>
    				<s:textfield name="graduation" label="graduation"></s:textfield>
    			</td>
    		</tr>
    		<tr><td><s:submit value=" submit "></s:submit></td>
    			<td>
    				<s:reset value=" reset "></s:reset>
    			</td>
    		</tr>
    	</table>	
    </s:form>
    
  </body>

效果如下图所示：

问题：当页面出现多个form表单时，如何用不同的方法来进行验证？
四、修改struts.xml中RegisterAction的配置，添加一个method属性，指定acton要执行的方法abc：

<action name="register" class="com.test.action.RegisterAction" method="abc">
		<result name="success">/success.jsp</result>
		<result name="input">/register2.jsp</result>
	</action>

五、在RegisterAction中创建Action要执行的abc方法：

public String abc() throws Exception {
		
		System.out.println("abc method invoked");
		return SUCCESS;
	}

问题：当在RegisterAction类中有多个的表单的action需要验证该怎么办？
六、在struts.xml中添加一个需要用到xyz方法的Action：

。。。
<action name="register" class="com.test.action.RegisterAction" method="abc">
		<result name="success">/success.jsp</result>
		<result name="input">/register2.jsp</result>
	</action>
	
	<action name="zly" class="com.test.action.RegisterAction" method="xyz">
		<result name="success">/success.jsp</result>
		<result name="input">/register2.jsp</result>
	</action>

七、在RegisterAction类中创建对应的action验证方法：

public String abc() throws Exception {
		
		System.out.println("abc() method invoked");
		return SUCCESS;
	}
	
	public void validateAbc(){
		
		System.out.println("validateAbc() invoked");
	}

控制台输出效果：