struts2 表单验证问题

Posted 2023-04-30

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假设有个UserAction,我想让execute执行时验证username和password非空，而不验证剩下的，changePassword执行时不验证前两个，这个怎么实现，最好用注解
public class UserAction extends ActionSupport

String username;
String password;
@Action("login")
@Override
public String execute() throws Exception
String oldpassword;
public String changePassword() throws Exception

校验一:javascript校验
校验二:手动校验:
1,在方法里获取植,判断值是不是为空
2,validate方法进行验证
3,validateXXX方法验证,即validateExecute()里面判断验证
校验三:框架验证
1,validate.xml文件验证
2,注解验证
在你的username的setUsername()上面写上
@RequiredStringValidator(
type=ValidatorType.FIELD,
key="error.username.required",
message="$getText('username')is required",
shortCircuit=ture
);
@StringLengthFieldValidator(
//自己再查查吧
)
我觉得你只能手动校验,或者选择validateExecute()种方法校验
因为注解会全部校验这个action里你注解的有set的变量的参考技术A 另外编写一个字符串的判空的类，比如StringUtil，可以这样写：
public class StringUtil
public static boolean isFilled(String str)
if(str == null || str.length() < 1)
return false;
else
return true;

然后再excute方法里面想要验证username和password，可以这样写：if(StringUtil.isFilled(username) && StringUtil.isFilled(password))
//不为空时的情况

下面changePassword方法不想验证就不写就行了。

是你想要的答案吗？参考技术B 在validate 方法中吧、、、在调用excute 方法之前执行

第七节 struts2.3.15之表单提交与表单验证

1.在WebContent中建立register.jsp文件，内容如下

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<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
.con{
position:absolute;
left:50%;
top:50%;
width:300px;
height:300px;
margin-top:-150px;
margin-left:-150px;
text-align:center;
border: 1px solid red;
}
</style>
</head>
<body>
<div class="con">
<s:form action="register" namespace="/form_test" method="post">
<s:textfield label="姓名" name="person.name" ></s:textfield>
<s:textfield label="密码" name="person.password"></s:textfield>
<s:textfield label="确认密码" name="person.confirmPassword"></s:textfield>
<s:textfield label="年龄" name="person.age" tooltip="年龄必须大于18岁"></s:textfield>
<s:checkboxlist name="person.hobby" list="{'篮球','编程','小说'}"></s:checkboxlist>
<s:submit label="提交"></s:submit>
</s:form>
</div>
</body>
</html>

3.在struts.xml文件中加入表单提交需要的action与result

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<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<package name="form_test" namespace="/form_test" extends="struts-default">
<action name="register" class="com.undergrowth.Register">
<result>/success.jsp</result>
</action>
</package>
<!-- <package name="first" namespace="/first" extends="struts-default">
<action name="first" class="com.undergrowth.First" method="execute">
<result name="success">/first.jsp</result>
</action>
</package> -->
</struts>

在WebContent下建立success.jsp文件

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<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
${person}
</body>
</html>

4.在src目录下建立Register的类文件,包名为com.undergrowth

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package com.undergrowth;
public class Register {
private String msg;
private Person person;
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
}
public String getMsg() {
return msg;
}
public String execute()
{
msg="注册成功";
return "success";
}
}

建立Person.java 对信息进行封装

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package com.undergrowth;
import java.util.Arrays;
public class Person {
private String name;
private String password;
private String confirmPassword;
private int age;
private String phone;
private String email;
private String[] hobby;
public String[] getHobby() {
return hobby;
}
public void setHobby(String[] hobby) {
this.hobby = hobby;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getConfirmPassword() {
return confirmPassword;
}
public void setConfirmPassword(String confirmPassword) {
this.confirmPassword = confirmPassword;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
return email;
}
this.email = email;
}
@Override
public String toString() {
return "Person [name=" + name + ", password=" + password
+ ", confirmPassword=" + confirmPassword + ", age=" + age
+ ", phone=" + phone + ", email=" + email + ", hobby="
+ Arrays.toString(hobby) + "]";
}
}

5.进行测试，发布项目到tomcat，在浏览器中输入http://localhost:8080/struts2_form/register.jsp

并输入相应的信息，如下

第七节 struts2.3.15之表单提交与表单验证

6.表单成功提交，进入到success.jsp界面，显示提交的表单信息

第七节 struts2.3.15之表单提交与表单验证

现在开始对上面表单提交的信息进行校验，采用xml配置的方式对表单提交的信息进行校验

1.Register类继承ActionSupport(因为需要对Register类的execute方法进行校验，需要使用ActionSupport来支持转发result)

2.编写验证的xml文件，该文件需要和action类放在同一个包下，文件的取名应遵守ActionClassName-validation.xml规则，其中ActionClassName为action的简单类名，-validation为固定写法。如这里就是Register-validation.xml文件放在com.undergrowth包下

验证的xml文件模板可以去你下载的struts2.3.15的完整版的目录文件中的apps中有相应的例子，即struts-2.3.15.1\apps\struts2-blank\WEB-INF\src\java\example\Login-validation.xml中拷贝过来

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