zoukankan html css js c++ java

3-struts核心业务（数据共享的三种方式，请求参数数据的封装，类型转换，文件上传和下载）

 1 package action;
 2 import java.util.ArrayList;
 3 import java.util.List;
 4 import javax.servlet.ServletContext;
 5 import javax.servlet.http.HttpServletRequest;
 6 import javax.servlet.http.HttpSession;
 7 import org.apache.struts2.ServletActionContext;
 8 import com.opensymphony.xwork2.ActionSupport;
 9 
10 public class UserAction extends ActionSupport{
11     public String showList() throws Exception{
12         //模拟从数据库中得到数据
13         List<String> list = new ArrayList<String>();
14         list.add("eric");
15         list.add("rose");
16     
17         //获取request
18         HttpServletRequest request = ServletActionContext.getRequest();
19         request.setAttribute("request_list", list);
20         
21         //获取session
22         HttpSession session = request.getSession(true);
23         session.setAttribute("session_list", list);
24         
25         //获取context
26         ServletContext context = ServletActionContext.getServletContext();
27         context.setAttribute("context_list", list);
28         
29         return SUCCESS;
30         
31     }
32 }

UserAction.java

<?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>    
    <package name="default" namespace="/scope" extends="struts-default">
        <global-allowed-methods>showList</global-allowed-methods>
        <action name="user_*" class="action.UserAction" method="{1}">
            <result>/listUser.jsp</result>
        </action>
    </package>
</struts>

struts.xml

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'listUser.jsp' starting page</title>
</head>

<body>
    <h3>request</h3>
    <table border="1">
        <c:forEach items="${requestScope.request_list}" var="user">
            <tr>
                <td>${user}</td>
            </tr>
        </c:forEach>
    </table>

    <h3>session</h3>
    <table border="1">
        <c:forEach items="${sessionScope.session_list}" var="user">
            <tr>
                <td>${user}</td>
            </tr>
        </c:forEach>
    </table>
    
    <h3>context</h3>
    <table border="1">
        <c:forEach items="${applicationScope.context_list}" var="user">
            <tr>
                <td>${user}</td>
            </tr>
        </c:forEach>
    </table>
</body>
</html>

listUser.sjp

ActionContext对象：每次创建action对象时都会创建它的上下文对象，提供了用来操作不同域对象的map集合。

脱离了servlet的api，运行这个方法不依赖于tomcat服务器。
ActionContext对象是由拦截器来构建的，而拦截器是在UserAction的构造方法之后执行。业务方法是在拦截器值后执行，故此ActionContext要在业务方法内才能正确获取，而不能所有方法使用一个ActionContext。（不推荐使用）

package action;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport{
    public String showList() throws Exception{
        //从数据库中得到数据
        List<String> list = new ArrayList<String>();
        list.add("eric");
        list.add("rose");
        
        ActionContext context = ActionContext.getContext();
        
        //操作这个map集合就等同于操作了request域的数据
        Map<String, Object> requestMap = context.getContextMap();
        requestMap.put("request_list", list);
        
        //session
        Map<String, Object> session = context.getSession();
        session.put("session_list", list);
        
        //context
        Map<String, Object> application = context.getApplication();
        application.put("context_list", list);
        return SUCCESS;
        
    }
}

UserAction.java

自动调用struts2的接口方法把操作request域的map集合传入。与第二种方法不同，这种方法的map对象可以给整个action使用，一次性获取后可在所有方法内使用。（在action对象方法比较多的时候推荐使用）

package action;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.struts2.interceptor.ApplicationAware;
import org.apache.struts2.interceptor.RequestAware;
import org.apache.struts2.interceptor.SessionAware;
import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport implements RequestAware,SessionAware,ApplicationAware{
    
    private Map<String,Object> requestMap;
    private Map<String,Object> sessionMap;
    private Map<String,Object> contextMap;
    
    public String showList() throws Exception{
        //从数据库中得到数据
        List<String> list = new ArrayList<String>();
        list.add("eric");
        list.add("rose");
        
        requestMap.put("request_list", list);
        sessionMap.put("session_list", list);
        contextMap.put("context_list", list);
        
        return SUCCESS;
        
    }

    @Override
    public void setRequest(Map<String, Object> request) {
        // TODO Auto-generated method stub
        this.requestMap = request;
    }

    @Override
    public void setApplication(Map<String, Object> context) {
        // TODO Auto-generated method stub
        this.contextMap = context;
    }

    @Override
    public void setSession(Map<String, Object> session) {
        // TODO Auto-generated method stub
        this.sessionMap = session;
    }
    
    
}

UserAction.java　　　

*一般如果有多个action需要注入，则在提取公共基类：BaseAction

package action;

import java.util.ArrayList;
import java.util.List;

public class UserAction extends BaseAction{
    
    public String showList() throws Exception{
        //从数据库中得到数据
        List<String> list = new ArrayList<String>();
        list.add("eric");
        list.add("rose");
        
        requestMap.put("request_list", list);
        sessionMap.put("session_list", list);
        contextMap.put("context_list", list);
        
        return SUCCESS;
        
    }


    
    
}

UserAction

package action;

import java.util.Map;

import org.apache.struts2.interceptor.ApplicationAware;
import org.apache.struts2.interceptor.RequestAware;
import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionSupport;
/**
 * 基础action类， 把这个基础的action来注入。
 * @author claire
 *
 */
public class BaseAction extends ActionSupport implements RequestAware,SessionAware,ApplicationAware {
    
    protected Map<String,Object> requestMap;
    protected Map<String,Object> sessionMap;
    protected Map<String,Object> contextMap;
    
    @Override
    public void setRequest(Map<String, Object> request) {
        // TODO Auto-generated method stub
        this.requestMap = request;
    }

    @Override
    public void setApplication(Map<String, Object> context) {
        // TODO Auto-generated method stub
        this.contextMap = context;
    }

    @Override
    public void setSession(Map<String, Object> session) {
        // TODO Auto-generated method stub
        this.sessionMap = session;
    }
}

BaseAction

请求参数数据的封装：

从表单传值到action的两种方式：

在action中直接定义变量，设置setter方法即可，struts2的拦截器可以自动获取。直接把参数赋值给属性。（字段驱动方式)

 1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
 2 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 3 <html>
 4 <head>
 5 <title>My JSP 'register.jsp' starting page</title>
 6 </head>
 7 
 8 <body>
 9     <form action="${pageContext.request.contextPath}/data/user_register.action" method="post">
10         用户名： <input type="text" name="name" />
11         密码：<input type="text" name="pwd" /> 
12         性别：<input type="radio" name="gender" value="男">男
13              <input type="radio" name="gender" value="女">女<br> 
14         爱好： 
15         <input type="checkbox" name="hobit" value="篮球">篮球 
16         <input type="checkbox" name="hobit" value="足球">足球 
17         <input type="checkbox" name="hobit" value="网球">网球<br> 
18         <input type="submit" value="注册">
19     </form>
20 </body>
21 </html>

 1 package action;
 2 
 3 import com.opensymphony.xwork2.ActionSupport;
 4 
 5 public class UserAction extends ActionSupport {
 6     
 7     private String name;
 8     private String password;
 9     private String gender;
10     private String[] hobit;
11     
12     /**
13      * 通过set方法将参数注入到action中
14      * @param name
15      */
16     public void setName(String name) {
17         this.name = name;
18     }
19     public void setPassword(String password) {
20         this.password = password;
21     }
22 
23     public void setGender(String gender) {
24         this.gender = gender;
25     }
26 
27     public void setHobit(String[] hobit) {
28         this.hobit = hobit;
29     }
30 
31     
32     public String register() throws Exception{
33         //使用表单数据
34         System.out.println("-----------------------------------------");
35         System.out.println(name+"--"+password+"--"+gender+"--"+hobit);
36         return SUCCESS;
37         
38     }
39 
40 
41     
42     
43 }

UserAction

<?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>    
    <package name="data" namespace="/data" extends="struts-default">
        <global-allowed-methods>register</global-allowed-methods>
        <action name="user_*" class="action.UserAction" method="{1}">
            <result>/success.jsp</result>
        </action>
    </package>
</struts>

struts.xml

直接把参数赋值给一个javabean对象。（域对象字段驱动方式）
- 将属性和相应的getter/setter从Action中提取出来，单独作为一个实体域对象，之后在action中直接使用这个对象。jsp页面表单与1）不同,标签的name属性应与UserAction中定义的javabean对象对应变量名相同（user.name）。如：<input type="text" name="user.name" />

package action;


public class User {
    private String name;
    private String password;
    private String gender;
    private String[] hobit;
    
    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 getGender() {
        return gender;
    }
    public void setGender(String gender) {
        this.gender = gender;
    }
    public String[] getHobit() {
        return hobit;
    }
    public void setHobit(String[] hobit) {
        this.hobit = hobit;
    }

    @Override
    public String toString() {
        // TODO Auto-generated method stub
        
        return this.name+"--"+this.gender+"--"+this.password+"--"+this.hobit.toString();
    }
}

User.java

package action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {

    //使用javabean对象
    private User user;
    
    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public String register() throws Exception{
        //使用表单数据
        System.out.println("-----------------------------------------");
        System.out.println(user);
        return SUCCESS;
    }

    
}

UserAction

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'register.jsp' starting page</title>
</head>

<body>
    <form action="${pageContext.request.contextPath}/data/user_register.action" method="post">
        用户名： <input type="text" name="user.name" />
        密码：<input type="text" name="user.password" /> 
        性别：<input type="radio" name="user.gender" value="男">男
             <input type="radio" name="user.gender" value="女">女<br> 
        爱好： 
        <input type="checkbox" name="user.hobit" value="篮球">篮球 
        <input type="checkbox" name="user.hobit" value="足球">足球 
        <input type="checkbox" name="user.hobit" value="网球">网球<br> 
        <input type="submit" value="注册">
    </form>
</body>
</html>

jsp

<?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>    
    <package name="data" namespace="/data" extends="struts-default">
        <global-allowed-methods>register</global-allowed-methods>
        <action name="user_*" class="action.UserAction" method="{1}">
            <result>/success.jsp</result>
        </action>
    </package>
</struts>

struts.xml

* struts2可以将请求参数自动从String类型转换成需要类型。无需自己动手转换

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'register.jsp' starting page</title>
</head>

<body>
    <form action="${pageContext.request.contextPath}/data/user_register.action" method="post">
        用户名： <input type="text" name="user.name" />
        年龄：<input type="text" name="user.age">
        成绩：<input type="text" name="user.score">
        出生日期：<input type="text" name="user.birth">
        <input type="submit">
    </form>
</body>
</html>

jsp

package action;

import java.util.Date;


public class User {
    
    private String name;
    private int age;
    private double score;
    private Date birth;
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public double getScore() {
        return score;
    }
    public void setScore(double score) {
        this.score = score;
    }
    public Date getBirth() {
        return birth;
    }
    public void setBirth(Date birth) {
        this.birth = birth;
    }

    @Override
    public String toString() {
        // TODO Auto-generated method stub
        return this.name+"--"+this.age+"--"+this.score+"--"+this.birth;
    }
    
}

User

模型驱动：Action实现ModelDriven接口，同样把表单数据封装起来，action类必须实例化该对象(User user = new User()），并要重写getModel方法，这个方法返回的即为Action所使用的数据模型对象(user)。

类型转换

当类型自动转换失败时，会自动交给input视图。返回“input"可在action配置时给他配置一个error页面(日期转化错误)

<?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>    
    <package name="data" namespace="/data" extends="struts-default">
        <global-allowed-methods>register</global-allowed-methods>
        <action name="user_*" class="action.UserAction" method="{1}">
            <result>/success.jsp</result>
            <result name="input">/error.jsp</result>
        </action>
    </package>
</struts>

struts.xml

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<title>错误信息页面</title>

</head>

<body>
    <%--打印错误信息 --%>
    <s:fielderror></s:fielderror>
</body>
</html>

error.jsp

自定义类型转换：

- 定义类型转换器，继承这个类：

package action;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;

import org.apache.struts2.util.StrutsTypeConverter;

public class MyDateConvert extends StrutsTypeConverter {

    SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy/MM/dd");

    /**
     * 从页面到服务器 参数一：context，值栈上下文对象 参数二：values， 从页面传过来的参数值 参数三：toClass，要转换的目标参数类型
     */
    @Override
    public Object convertFromString(Map context, String[] values, Class toClass) {
        System.out.println("-----进入转换器---------------");
        try {
            // 判断value是否为空
            if (values == null || values.length == 0)
                return null;

            // 取出数据进行转换
            if (values.length > 1) {
                Date[] dates = new Date[values.length];
                for (int i = 0; i < dates.length; i++) {
                    Date date = sdf1.parse(values[i]);
                    dates[i] = date;
                }
                return dates;
            } else {
                // 一个值
                Date date = sdf1.parse(values[0]);
                return date;
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    public String convertToString(Map context, Object o) {
        // 从服务器到页面的转换
        return null;
    }

}

MyDateConvert.java

- 绑定自定义转换器：
  - 局部绑定：只绑定一个action
    - 建立一个“action文件名-conversion.properties”文件，将其与被绑定action放在同一目录下

- - 全局绑定：绑定整个项目多个action （常用）
    - 建立一个xwork-conversion.properties放在src目录下
    - 所有Date类型的数据都走这个转换器

文件上传和下载：

文件上传：

三要素：

1. 表单有file
2. post提交
3. enctype="multipart/form-data"：multipart/form-data设置以二进制流的方式处理表单数据，这种编码方式会将文件域指定的文件的内容也封装进请求参数中。
- 如果涉及到中文的文件名称，需要在配置文件中加入<constant name="struts.il8n.encoding" value="gbk"/>

在Action中接收文件内容

File attach: attach是file表单中的name属性
接收文件类型,固定模式拼接：file名+ContentType
接收文件名字，也是固定的拼接：file名+FileName
private String attachFileName;

<?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>    
        <include file="upload_down/struts-upload.xml"></include>
</struts>

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>
    <package name="upload" namespace="/upload" extends="struts-default">
        <action name="upload" class="upload_down.UploadAction">

            <!-- 往FileUploadInterceptor拦截器的属性注入值（调用setter方法） -->
            <interceptor-ref name="defaultStack">
                <!-- 改变当前文件上传拦截器的允许文件类型 -->
                <param name="fileUpload.allowedTypes">image/jpeg,image/jpg</param>
                <!-- 允许后缀 -->
                <!-- 如果两个配置都写了，取交集 -->
                <param name="fileUpload.allowedExtensions">jpg,jpeg,gif</param>
            </interceptor-ref>

            <param name="savePath">D:/ajava/test/</param>
            <result>/success.jsp</result>
            <result name="input">/error.jsp</result>
        </action>
        
        <action name="down_*" class="upload_down.DownAction" method="{1}">
            <param name="serverPath">D:/ajava/test</param>
            <result name="list">/listFile.jsp</result>
        </action>
    </package>
</struts>

struts_upload.xml

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'upload.jsp' starting page</title>
</head>

<body>
    <form action="${pageContext.request.contextPath}/upload/upload.action" method="post" enctype="multipart/form-data">
        文件：<input type="file" name="attach"><br>
        描述：<input type="text" name="info"><br>
        <input type="submit" value="上传">
    </form>
</body>
</html>

upload.jsp

package upload_down;

import java.io.File;

import org.apache.commons.io.FileUtils;

import com.opensymphony.xwork2.ActionSupport;

/**
 * 文件上传
 * @author claire
 *
 */
public class UploadAction extends ActionSupport{
    
    //接收上传文件，名字与表单中相同
    private File attach;
    //接收文件类型,固定模式拼接：file名+ContentType
    private String attachContentType;
    //接收文件名字，也是固定的拼接：file名+FileName
    private String attachFileName;
    //接收描述
    private String info;
    //注入服务器地址
    private String savePath;
    
    public String getSavePath() {
        return savePath;
    }
    public void setSavePath(String savePath) {
        this.savePath = savePath;
    }
    public File getAttach() {
        return attach;
    }
    public void setAttach(File attach) {
        this.attach = attach;
    }

    public String getAttachContentType() {
        return attachContentType;
    }


    public void setAttachContentType(String attachContentType) {
        this.attachContentType = attachContentType;
    }


    public String getAttachFileName() {
        return attachFileName;
    }


    public void setAttachFileName(String attachFileName) {
        this.attachFileName = attachFileName;
    }


    public String getInfo() {
        return info;
    }


    public void setInfo(String info) {
        this.info = info;
    }



    
    
    @Override
    public String execute() throws Exception {
        System.out.println(attach);
        System.out.println(attachFileName);
        System.out.println(info);
        System.out.println(savePath+attachFileName);
        
        /*
         * 保存到服务器硬盘中
         */
        FileUtils.copyFile(attach, new File(savePath+attachFileName));
        
        return super.execute();
    }
}

UploadAction.java

文件下载：

<result name="down" type="stream">一定要是stream
action中一定要有获得输入流的方法：public InputStream getInputStream()对应struts.xml中的
<param name="inputName">inputStream</param>

<?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>
<global-allowed-methods>list,down</global-allowed-methods>
        <action name="down_*" class="upload_down.DownAction" method="{1}">
            <param name="serverPath">D:/ajava/test/</param>
            <result name="fileList">/listFile.jsp</result>
            <!-- 文件下载的关键，视图类型要是stream -->
            <result name="down" type="stream">
                <!-- 往StreamResult中注入属性 -->
                <!-- 文件类型image/jpg 通用类型：application/octet-stream（在tomcat里的conf中的web.xml中查exe）-->
                <param name="contentType">application/octet-stream</param>
                <param name="inputName">inputStream</param>
                <!-- filename=${name}获取action中的name -->
                <param name="contentDisposition">attachment;filename=${name}</param>
                <param name="bufferSize">1024</param>
                
            </result>
            
        </action>
    </package>
</struts>

struts_down.xml

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'listUser.jsp' starting page</title>
</head>

<body>
    <table border="1" width="300">
        <tr>
            <th>编号</th>
            <th>文件名称</th>
            <th>操作</th>
        </tr>
        <c:forEach items="${fileList}" var="file" varStatus="varSta">
            <tr>
                <td>${varSta.count}</td>
                <td>${file}</td>
                <td><a href="${pageContext.request.contextPath}/upload/down_down?name=${file}">下载</a></td>
            </tr>
        </c:forEach>
    </table>
</body>
</html>

fileList.jsp

package upload_down;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.sql.Savepoint;
import java.util.Map;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class DownAction extends ActionSupport{
    private String serverPath;
    private String name;
    
    /**
     * 显示文件列表
     * @return
     * @throws Exception
     */
    public String list() throws Exception{
        File file = new File(serverPath);
        String[] list = file.list();
        //把文件列表转到listFile.jsp
        ActionContext context = ActionContext.getContext();
        Map<String, Object> contextMap = context.getContextMap();
        contextMap.put("fileList", list);
        return "fileList";
    }
    
    /**
     * 下载文件
     * @return
     * @throws Exception
     */
    public String down() throws Exception{
        return "down";
    }
    
    /**
     * 提供struts写出数据的输入流
     * @return
     */
    public InputStream getInputStream(){
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(new File(serverPath+name));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return fis;
    }
    
    
    public String getServerPath() {
        return serverPath;
    }

    public void setServerPath(String serverPath) {
        this.serverPath = serverPath;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    
}

DownAction.java

注解配置Action步骤

除了struts基础包外，还要另外导入：

web.xml:

    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
        <!-- 配置action所在的包 -->
        <init-param>
            <param-name>actinoPackage</param-name>
            <param-value>claire.actionClass</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

View Code

在web.xml配置的包下新疆Action类，在类中使用注解。

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原文地址：https://www.cnblogs.com/clairexxx/p/9891240.html

3-struts核心业务（数据共享的三种方式，请求参数数据的封装，类型转换，文件上传和下载）

目录：