Jsp Struts2文件上传

我想以一种形式上传多个文件，文件数量因用户而异，例如，一个用户可以上传2个文件，另一个用户可以上传12个文件。我想知道如何在jsp struts2表单中创建一个循环或其他东西，这样当用户上载一个文件时，它会将其名称添加到列表中，他/她可以上载另一个文件并添加到列表中，依此类推

您可以使用内置Struts2多文件上传功能

<s:form action="doMultipleUploadUsingList" method="POST" enctype="multipart/form-data">
    <s:file label="File (1)" name="upload" />
    <s:file label="File (2)" name="upload" />
    <s:file label="FIle (3)" name="upload" />
    <s:submit />
</s:form>

有关详细信息，请参阅Struts2的多文件上传页面

---

向用户显示在JSP页面上添加更多文件的选项是如何显示的问题。向用户显示文件上载框名称时，您需要注意的是，文件上载框名称应相同，以便

Struts2 param interceptor

可以将它们设置为动作类中的列表，Struts2 JQuery插件和Struts2范围插件

答案如下：

在maven POM文件中包含这些依赖项：

        <dependency>
            <groupId>com.jgeppert.struts2.jquery</groupId>
            <artifactId>struts2-jquery</artifactId>
            <version>3.2.0</version>
            <type>pom</type>
        </dependency>
        <dependency>
            <groupId>com.googlecode.struts2scopeplugin</groupId>
            <artifactId>struts2-scope-plugin</artifactId>
            <version>1.0.4</version>
        </dependency>

com.jgeppert.struts2.jquery
struts2 jquery
3.2.0
聚甲醛
com.googlecode.struts2scopeplugin
struts2范围插件
1.0.4

我们创建一个类来准备表单，如下所示：

 public class PrepareUpload extends ActionSupport{
     @In (scope=ScopeType.CONVERSATION)
      @Out (scope=ScopeType.CONVERSATION)
      private List<File> fileUploadi = new ArrayList<File>();

      @In (scope=ScopeType.CONVERSATION)
      @Out (scope=ScopeType.CONVERSATION)
        private List<String> fileUploadContentTypei = new ArrayList<String>();

      @In (scope=ScopeType.CONVERSATION)
      @Out (scope=ScopeType.CONVERSATION)
        private List<String> fileUploadFileNamei = new ArrayList<String>();

    @Action(value = "/prepareupload", results = {
            @Result(location = "upload.jsp", name = "success")
          })
          @End
    public String execute() throws Exception

      {
        return SUCCESS;

      }

    public List<File> getFileUploadi() {
        return fileUploadi;
    }

    public void setFileUploadi(List<File> fileUploadi) {
        this.fileUploadi = fileUploadi;
    }

    public List<String> getFileUploadContentTypei() {
        return fileUploadContentTypei;
    }

    public void setFileUploadContentTypei(List<String> fileUploadContentTypei) {
        this.fileUploadContentTypei = fileUploadContentTypei;
    }

    public List<String> getFileUploadFileNamei() {
        return fileUploadFileNamei;
    }

    public void setFileUploadFileNamei(List<String> fileUploadFileNamei) {
        this.fileUploadFileNamei = fileUploadFileNamei;
    }

}

public class UploadAction extends ActionSupport {

  private static final long serialVersionUID = 7968544374444173511L;
  private static final Log  log              = LogFactory.getLog(UploadAction.class);


  private String            echo;
  @In (scope=ScopeType.CONVERSATION)
  @Out (scope=ScopeType.CONVERSATION)
  private List<File> fileUploadi = new ArrayList<File>();
  private List<File> fileUpload = new ArrayList<File>();
  @In (scope=ScopeType.CONVERSATION)
  @Out (scope=ScopeType.CONVERSATION)
    private List<String> fileUploadContentTypei = new ArrayList<String>();
  private List<String> fileUploadContentType = new ArrayList<String>();
  @In (scope=ScopeType.CONVERSATION)
  @Out (scope=ScopeType.CONVERSATION)
    private List<String> fileUploadFileNamei = new ArrayList<String>();
  private List<String> fileUploadFileName = new ArrayList<String>();
  @Action(value = "/uploada", results = {
    @Result(location = "simpleecho.jsp", name = "success")
  })
  @Begin
  public String execute() throws Exception
  {

fileUploadi.addAll( fileUpload);
fileUploadFileNamei.addAll(fileUploadFileName);
fileUploadContentTypei.addAll(fileUploadContentType);
   for (int i = 0;  i < fileUploadFileNamei.size();  i++)
   {
       if (echo == null)
           echo =   fileUploadFileNamei.get(i);
       else
      echo +=  "<br>" + fileUploadFileNamei.get(i);
    log.info(echo);
   }
    return SUCCESS;
  }

  public String getEcho()
  {
    return echo;
  }


  public List<File> getFileUpload() {
        return fileUpload;
    }

    public void setFileUpload(List<File> fileUpload) {
        this.fileUpload = fileUpload;
    }

    public List<String> getFileUploadContentType() {
        return fileUploadContentType;
    }

    public void setFileUploadContentType(List<String> fileUploadContentType) {
        this.fileUploadContentType = fileUploadContentType;
    }

    public List<String> getFileUploadFileName() {
        return fileUploadFileName;
    }

    public void setFileUploadFileName(List<String> fileUploadFileName) {
        this.fileUploadFileName = fileUploadFileName;
    }

    public List<File> getFileUploadi() {
        return fileUploadi;
    }

    public void setFileUploadi(List<File> fileUploadi) {
        this.fileUploadi = fileUploadi;
    }

    public List<String> getFileUploadContentTypei() {
        return fileUploadContentTypei;
    }

    public void setFileUploadContentTypei(List<String> fileUploadContentTypei) {
        this.fileUploadContentTypei = fileUploadContentTypei;
    }

    public List<String> getFileUploadFileNamei() {
        return fileUploadFileNamei;
    }

    public void setFileUploadFileNamei(List<String> fileUploadFileNamei) {
        this.fileUploadFileNamei = fileUploadFileNamei;
    }




    }

公共类PrepareUpload扩展了ActionSupport{
@In（scope=ScopeType.CONVERSATION）
@Out（scope=ScopeType.CONVERSATION）
private List fileUploadi=new ArrayList（）；
@In（scope=ScopeType.CONVERSATION）
@Out（scope=ScopeType.CONVERSATION）
私有列表fileUploadContentTypei=newArrayList（）；
@In（scope=ScopeType.CONVERSATION）
@Out（scope=ScopeType.CONVERSATION）
私有列表fileUploadFileNamei=newarraylist（）；
@操作（value=“/prepareupload”，结果={
@结果（location=“upload.jsp”，name=“success”）
})
@结束
公共字符串execute（）引发异常
{
回归成功；
}
公共列表getFileUploadi（）{
返回文件上传；
}
public void setFileUploadi（列表fileUploadi）{
this.fileUploadi=fileUploadi；
}
公共列表getFileUploadContentTypei（）{
返回fileUploadContentTypei；
}
public void setFileUploadContentTypei（列表fileUploadContentTypei）{
this.fileUploadContentTypei=fileUploadContentTypei；
}
公共列表getFileUploadFileNamei（）{
返回fileUploadFileNamei；
}
public void setFileUploadFileNamei（列表fileUploadFileNamei）{
this.fileUploadFileNamei=fileUploadFileNamei；
}
}

以及一个用于添加到列表和处理ajax调用的类，如下所示：

 public class PrepareUpload extends ActionSupport{
     @In (scope=ScopeType.CONVERSATION)
      @Out (scope=ScopeType.CONVERSATION)
      private List<File> fileUploadi = new ArrayList<File>();

      @In (scope=ScopeType.CONVERSATION)
      @Out (scope=ScopeType.CONVERSATION)
        private List<String> fileUploadContentTypei = new ArrayList<String>();

      @In (scope=ScopeType.CONVERSATION)
      @Out (scope=ScopeType.CONVERSATION)
        private List<String> fileUploadFileNamei = new ArrayList<String>();

    @Action(value = "/prepareupload", results = {
            @Result(location = "upload.jsp", name = "success")
          })
          @End
    public String execute() throws Exception

      {
        return SUCCESS;

      }

    public List<File> getFileUploadi() {
        return fileUploadi;
    }

    public void setFileUploadi(List<File> fileUploadi) {
        this.fileUploadi = fileUploadi;
    }

    public List<String> getFileUploadContentTypei() {
        return fileUploadContentTypei;
    }

    public void setFileUploadContentTypei(List<String> fileUploadContentTypei) {
        this.fileUploadContentTypei = fileUploadContentTypei;
    }

    public List<String> getFileUploadFileNamei() {
        return fileUploadFileNamei;
    }

    public void setFileUploadFileNamei(List<String> fileUploadFileNamei) {
        this.fileUploadFileNamei = fileUploadFileNamei;
    }

}

public class UploadAction extends ActionSupport {

  private static final long serialVersionUID = 7968544374444173511L;
  private static final Log  log              = LogFactory.getLog(UploadAction.class);


  private String            echo;
  @In (scope=ScopeType.CONVERSATION)
  @Out (scope=ScopeType.CONVERSATION)
  private List<File> fileUploadi = new ArrayList<File>();
  private List<File> fileUpload = new ArrayList<File>();
  @In (scope=ScopeType.CONVERSATION)
  @Out (scope=ScopeType.CONVERSATION)
    private List<String> fileUploadContentTypei = new ArrayList<String>();
  private List<String> fileUploadContentType = new ArrayList<String>();
  @In (scope=ScopeType.CONVERSATION)
  @Out (scope=ScopeType.CONVERSATION)
    private List<String> fileUploadFileNamei = new ArrayList<String>();
  private List<String> fileUploadFileName = new ArrayList<String>();
  @Action(value = "/uploada", results = {
    @Result(location = "simpleecho.jsp", name = "success")
  })
  @Begin
  public String execute() throws Exception
  {

fileUploadi.addAll( fileUpload);
fileUploadFileNamei.addAll(fileUploadFileName);
fileUploadContentTypei.addAll(fileUploadContentType);
   for (int i = 0;  i < fileUploadFileNamei.size();  i++)
   {
       if (echo == null)
           echo =   fileUploadFileNamei.get(i);
       else
      echo +=  "<br>" + fileUploadFileNamei.get(i);
    log.info(echo);
   }
    return SUCCESS;
  }

  public String getEcho()
  {
    return echo;
  }


  public List<File> getFileUpload() {
        return fileUpload;
    }

    public void setFileUpload(List<File> fileUpload) {
        this.fileUpload = fileUpload;
    }

    public List<String> getFileUploadContentType() {
        return fileUploadContentType;
    }

    public void setFileUploadContentType(List<String> fileUploadContentType) {
        this.fileUploadContentType = fileUploadContentType;
    }

    public List<String> getFileUploadFileName() {
        return fileUploadFileName;
    }

    public void setFileUploadFileName(List<String> fileUploadFileName) {
        this.fileUploadFileName = fileUploadFileName;
    }

    public List<File> getFileUploadi() {
        return fileUploadi;
    }

    public void setFileUploadi(List<File> fileUploadi) {
        this.fileUploadi = fileUploadi;
    }

    public List<String> getFileUploadContentTypei() {
        return fileUploadContentTypei;
    }

    public void setFileUploadContentTypei(List<String> fileUploadContentTypei) {
        this.fileUploadContentTypei = fileUploadContentTypei;
    }

    public List<String> getFileUploadFileNamei() {
        return fileUploadFileNamei;
    }

    public void setFileUploadFileNamei(List<String> fileUploadFileNamei) {
        this.fileUploadFileNamei = fileUploadFileNamei;
    }




    }

public类UploadAction扩展了ActionSupport{
私有静态最终长serialVersionUID=7968544374444173511L；
私有静态最终日志Log=LogFactory.getLog（UploadAction.class）；
私有串回波；
@In（scope=ScopeType.CONVERSATION）
@Out（scope=ScopeType.CONVERSATION）
private List fileUploadi=new ArrayList（）；
private List fileUpload=new ArrayList（）；
@In（scope=ScopeType.CONVERSATION）
@Out（scope=ScopeType.CONVERSATION）
私有列表fileUploadContentTypei=newArrayList（）；
私有列表fileUploadContentType=new ArrayList（）；
@In（scope=ScopeType.CONVERSATION）
@Out（scope=ScopeType.CONVERSATION）
私有列表fileUploadFileNamei=newarraylist（）；
private List fileUploadFileName=new ArrayList（）；
@操作（value=“/uploada”），结果={
@结果（location=“simpleecho.jsp”，name=“success”）
})
@开始
公共字符串execute（）引发异常
{
fileUploadi.addAll（fileUpload）；
fileUploadFileNamei.addAll（fileUploadFileName）；
fileUploadContentTypei.addAll（fileUploadContentType）；
对于（int i=0；i”+fileUploadFileNamei.get（i）；
日志信息（echo）；
}
回归成功；
}
公共字符串getEcho（）
{
回波；
}
公共列表getFileUpload（）{
返回文件上传；
}
public void setFileUpload（列表fileUpload）{
this.fileUpload=fileUpload；
}
公共列表getFileUploadContentType（）{
返回fileUploadContentType；
}
public void setFileUploadContentType（列表fileUploadContentType）{
this.fileUploadContentType=fileUploadContentType；
}
公共列表getFileUploadFileName（）{
返回fileUploadFileName；
}
public void setFileUploadFileName（列出fileUploadFileName）{
this.fileUploadFileName=fileUploadFileName；
}
公共列表getFileUploadi（）{
返回文件上传；
}
public void setFileUploadi（列表fileUploadi）{
this.fileUploadi=fileUploadi；
}
公共列表getFileUploadContentTypei（）{
返回fileUploadContentTypei；
}
public void setFileUploadContentTypei（列表fileUploadContentTypei）{
this.fileUploadContentTypei=fileUploadContentTypei；
}
公共列表getFileUploadFileNamei（）{
返回fileUploadFileNamei；
}
public void setFileUploadFileNamei（列表fileUploadFileNamei）{
this.fileUploadFileNamei=fileUploadFileNamei；
}
}

最后，jsp应该类似于：

<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ taglib prefix="sj" uri="/struts-jquery-tags"%>

<html>
<head>
<sj:head jqueryui="true" defaultLoadingText="Please wait ..."/>
<s:head />
</head>

<body>
<h1>File Upload:</h1>

<s:form action="uploada" 
method="POST" enctype="multipart/form-data" theme="xhtml" >

<s:file label="File:" name="fileUpload" size="40" />

 <div id="result" >Add Files Below:</div>
<sj:submit 
            targets="result" 
            button="true" 
            validate="true" 
            value="Add File" 
            indicator="indicator"
            parentTheme="xhtml"
            />
<sj:submit 
            button="true" 
            validate="true" 
            value="Submit" 
            indicator="indicator"
            parentTheme="xhtml"
            />

</s:form>

</body>
</html>

文件上载：
在下面添加文件：

我知道如何使用操作和此多文件表单。我不知道的是如何将上传的文件数量增加到100例如，我能做一个循环吗？例如，当他上传一个文件时，它会添加它，并要求他上传另一个文件，当用户提交表单时，我可以用一个文件数组来处理它。这只是一个UI iP配置，与我相信你的操作无关看起来像gmail提供的东西，所以它提供的只是支持i帧的功能，可以找到deta