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07.struts2中的数据合法性验证和文件上传

2021-01-04 15:33:11 作者：互联网

07.struts2中的数据合法性验证和文件上传

1、数据合法性验证

编程式验证

1、继承ActionSupport

2、重写validate方法

该方法在Validation拦截器中被调用执行
拦截器栈的执行顺序
prepare
modelDrivem
params
validation

3、编写验证规则

如果不符合规则，则调用addFieldError方法
addFieldError(错误的字段名,错误提示信息)
当执行该方法的时候，该方法会向值栈中添加错误消息(fieldErrors)，并且返回result name=input

配置式验证

Struts2提供的验证器

验证器配置文件必须放在被验证的属性的同包下
名称：被验证的属性所在类的类名-validation.xml

<!--基于验证器 
type:Struts2自带验证器的别名，在struts-core/com/opensymphony/xwork2/validator/validators/default.xml可以看到
-->
<validator name="required" class="com.opensymphony.xwork2.validator.validators.RequiredFieldValidator"/>
			<validator name="requiredstring" class="com.opensymphony.xwork2.validator.validators.RequiredStringValidator"/>
			<validator name="int" class="com.opensymphony.xwork2.validator.validators.IntRangeFieldValidator"/>
			<validator name="long" class="com.opensymphony.xwork2.validator.validators.LongRangeFieldValidator"/>
			<validator name="short" class="com.opensymphony.xwork2.validator.validators.ShortRangeFieldValidator"/>
			<validator name="double" class="com.opensymphony.xwork2.validator.validators.DoubleRangeFieldValidator"/>
			<validator name="date" class="com.opensymphony.xwork2.validator.validators.DateRangeFieldValidator"/>
			<validator name="expression" class="com.opensymphony.xwork2.validator.validators.ExpressionValidator"/>
			<validator name="fieldexpression" class="com.opensymphony.xwork2.validator.validators.FieldExpressionValidator"/>
			<validator name="email" class="com.opensymphony.xwork2.validator.validators.EmailValidator"/>
			<validator name="creditcard" class="com.opensymphony.xwork2.validator.validators.CreditCardValidator"/>
			<validator name="url" class="com.opensymphony.xwork2.validator.validators.URLValidator"/>
			<validator name="visitor" class="com.opensymphony.xwork2.validator.validators.VisitorFieldValidator"/>
			<validator name="conversion" class="com.opensymphony.xwork2.validator.validators.ConversionErrorFieldValidator"/>
			<validator name="stringlength" class="com.opensymphony.xwork2.validator.validators.StringLengthFieldValidator"/>
			<validator name="regex" class="com.opensymphony.xwork2.validator.validators.RegexFieldValidator"/>
			<validator name="conditionalvisitor" class="com.opensymphony.xwork2.validator.validators.ConditionalVisitorFieldValidator"/>

基于验证器的配置

<validator type="int">
    <!-- 验证哪个字段 -->
    <param name="fieldName">stuAge</param>
    <!-- 验证器需要的参数 -->
    <param name="min">0</param>
    <param name="max">120</param>
    <!-- 不符合规则时的反馈信息 -->
    <message>年龄不对头啊</message>
</validator>

基于字段的配置

<field name="stuName">
<field-validator type="requiredstring">
<!-- 该属性为true，在验证之前requiredstring会先进行.trim()方法去除两端空格，如果为false，则不会去空格 -->
<param name="trim">true</param>
<message>用户名不能为空！</message>
</field-validator>
<field-validator type="regex">
<param name="regexExpression">
<!-- 正则表达式中可能含有大量的特殊字符
<!--
	[CDATA[内容]]>:其中的内容如果在XML文件中，则不需要特殊转义(< &lt; > &gt; & &amp;... ...)
-->
<![CDATA[([a-zA-Z]\w*)]]>
</param>
<message>名称不合适</message>
</field-validator>
</field>

2、文件上传

A、导入jar包

commons-fileupload
commons-io

B、文件上传的三要素

表单提交方式必须为post
设置表单的enctype属性为multipart/form-data
表单中必须包含input type=file的文件框元素

C、在类中声明java.io.File对象，用于存储上传的文件

D、接收额外提交的FileName截取并拼接文件名和输出路径

E、创建FileUtils工具类

copyFile(文件来源,写入的目标);

F、配置文件上传的设置

struts.xml

案例：

导入相应的jar包

commons-fileupload
commons-io

配置web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	id="WebApp_ID" version="3.0">
	<display-name>struts2Test09</display-name>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

	<filter>
		<filter-name>dispatcherFilter</filter-name>
		<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>dispatcherFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

jsp页面

验证数据的合法性

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<form action="student/registerStuInfo" method="post">
		姓名：<input type="text" name="stuName"><br/>
		年龄：<input type="text" name="stuAge"><br/>
		邮箱：<input type="text" name="stuEmail"><br/>
		<input type="submit" value="提交啊">
	</form>
</body>
</html>

error.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<s:fielderror></s:fielderror>
<s:debug></s:debug>
</body>
</html>

success.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>成功！</h1>
<s:debug></s:debug>
</body>
</html>

fileUpload.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<form action="student/uploadFileMethod" method="post" enctype="multipart/form-data">
		<input type="file" name="myFile">
		<input type="submit" value="提交">
	</form>
</body>
</html>

配置struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
        "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<constant name="struts.devMode" value="true"></constant>
	<constant name="struts.multipart.maxSize" value="209715200"></constant>
	<package name="student" extends="struts-default" namespace="/student">
		<action name="uploadFileMethod" class="com.zuxia.action.FileUploadAction" method="uploadFileMethod">
			<result>
				/success.jsp
			</result>
		</action>
	
		<action name="registerStuInfo" class="com.zuxia.action.StudentAction" method="registerStuInfo">
			<result>
				/success.jsp
			</result>
			<result name="input">
				/errorPage.jsp
			</result>
		</action>
        
	</package>
</struts>

Action类

数据合法性处理类(第一种方式)

package com.zuxia.action;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.zuxia.entity.StudentInfo;

public class StudentAction extends ActionSupport implements ModelDriven<StudentInfo>{
	
	private StudentInfo studentInfo;
	
	public String registerStuInfo() {
		
		System.out.println(studentInfo);
		
		return "success";
	}
	
	@Override
	public StudentInfo getModel() {
		studentInfo = new StudentInfo();
		return studentInfo;
	}
	/**
	 *
	 * 验证方法
	/*
	@Override
	public void validate() {
		if(studentInfo.getStuAge()<18) {
			//当数据不符合验证规则的时候，如果不想程序进入控制器的目标方法继续执行，则可以调用					ActionSupport中的addFieldError来添加错误信息
			addFieldError("stuAge", "年龄太小啦，不得行");
		}
		if(studentInfo.getStuAge()>50) {
			addFieldError("stuAge", "年龄太大了，建议老年大学继续深造");
		}
	}
	*/
}

第二种方式

配置：类名-validation.xml文件(命名必须和所在包类名一致)

例如：StudentAction-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
        "-//Apache Struts//XWork Validator 1.0.2//EN"
        "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
<!-- 
	验证器配置文件必须放在被验证的属性的同包下
		名称：被验证的属性所在类的类名-validation.xml
 -->
<validators>
	<!-- 
		基于验证器 
			type:Struts2自带验证器的别名，在struts-core/com/opensymphony/xwork2/validator/validators/default.xml可以看到
	-->
	<validator type="int">
		<!-- 验证哪个字段 -->
		<param name="fieldName">stuAge</param>
		<!-- 验证器需要的参数 -->
		<param name="min">0</param>
		<param name="max">120</param>
		<!-- 不符合规则时的反馈信息 -->
		<message>年龄不对头啊</message>
	</validator>
	<validator type="email">
		<param name="fieldName">stuEmail</param>
		<message>邮箱格式不对</message>
	</validator>
	
	<!-- 
		基于字段配置
	 -->
	<field name="stuName">
		<field-validator type="requiredstring">
			<!-- 该属性为true，在验证之前requiredstring会先进行.trim()方法去除两端空格，如果为false，则不会去空格 -->
			<param name="trim">true</param>
			<message>用户名不能为空！</message>
		</field-validator>
		<field-validator type="regex">
			<param name="regexExpression">
				<!-- 正则表达式中可能含有大量的特殊字符
					<![CDATA[内容]]>:其中的内容如果在XML文件中，则不需要特殊转义(< &lt; > &gt; & &amp;... ...)
				 -->
				<![CDATA[([a-zA-Z]\w*)]]>
			</param>
			<message>名称不合适</message>
		</field-validator>
	</field>
</validators>

FileUploadAction.java文件上传处理类

package com.zuxia.action;

import java.io.File;
import java.io.IOException;
import java.util.UUID;

import org.apache.commons.io.FileUtils;

public class FileUploadAction {
	
	//声明java.io.File对象用于接收上传的文件
	private File myFile;
	/*
	 * 	如果表单提交的是文件，则会额外追加两个提交参数
	 * 		[表单的name]ContentType
	 * 		[表单的name]FileName
	 * */
	//文件类型
	private String myFileContentType;
	//文件名(通过她来获得文件的后缀)
	private String myFileFileName;
	
	
	public String uploadFileMethod() {
		//截取后缀名
		String suffix = myFileFileName.substring(myFileFileName.lastIndexOf("."));
		//通过UUID随机生成一个文件名，拼接上后缀作为真正的文件名
		String servetFileName = UUID.randomUUID()+suffix;
		//创建文件工具类对象
		FileUtils fileUtils = new FileUtils();
		
		//创建文件保存的位置，以及文件名的file对象
		File tagetPath = new File("D:/uploadFile/"+servetFileName);
		
		try {
			//保存文件操作
			fileUtils.copyFile(myFile, taggetPath);
		} catch (IOException e) {
			System.out.println("保存文件失败");
		}
		return "success";
	}

	public void setMyFile(File myFile) {
		this.myFile = myFile;
	}
	
	public File getMyFile() {
		return myFile;
	}

	public String getMyFileContentType() {
		return myFileContentType;
	}

	public void setMyFileContentType(String myFileContentType) {
		this.myFileContentType = myFileContentType;
	}

	public String getMyFileFileName() {
		return myFileFileName;
	}

	public void setMyFileFileName(String myFileFileName) {
		this.myFileFileName = myFileFileName;
	}
}

配置struts.xml文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
        "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<constant name="struts.devMode" value="true"></constant>
    <!--文件上传大小的设置：默认最大为2MB，我们想上传大文件可以更改struts.multipart.maxSize属性的value值-->
	<constant name="struts.multipart.maxSize" value="209715200"></constant>
	<package name="student" extends="struts-default" namespace="/student">
        <!--文件上传的action-->
		<action name="uploadFileMethod" class="com.zuxia.action.FileUploadAction" method="uploadFileMethod">
			<result>
				/success.jsp
			</result>
		</action>
		<!--数据合法性验证action-->
		<action name="registerStuInfo" class="com.zuxia.action.StudentAction" method="registerStuInfo">
			<result>
				/success.jsp
			</result>
            <!--不合法就跳转-->
			<result name="input">
				/errorPage.jsp
			</result>
		</action>
	</package>
</struts>

entity(实体类)

package com.zuxia.entity;

public class StudentInfo {
	private String stuName;
	private Integer stuAge;
	private String stuEmail;

	public String getStuName() {
		return stuName;
	}

	public void setStuName(String stuName) {
		this.stuName = stuName;
	}

	public Integer getStuAge() {
		return stuAge;
	}

	public void setStuAge(Integer stuAge) {
		this.stuAge = stuAge;
	}

	public String getStuEmail() {
		return stuEmail;
	}

	public void setStuEmail(String stuEmail) {
		this.stuEmail = stuEmail;
	}

	public StudentInfo(String stuName, Integer stuAge, String stuEmail) {
		super();
		this.stuName = stuName;
		this.stuAge = stuAge;
		this.stuEmail = stuEmail;
	}

	public StudentInfo() {
		super();
	}

	@Override
	public String toString() {
		return "StudentInfo [stuName=" + stuName + ", stuAge=" + stuAge + ", stuEmail=" + stuEmail + "]";
	}
}

标签：文件,String,struts2,jsp,stuEmail,上传,public,stuAge,07
来源： https://blog.csdn.net/ycjcson/article/details/112179806