Struts2上傳多個文件，下載

import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.util.List;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadList extends ActionSupport { private String username; private String passwrod; private List<File> file; private List<String> fileFileName; private List<String> fileContentType;

public String getUsername() {
    return username;
}
public void setUsername(String username) {
    this.username = username;
}
public String getPasswrod() {
    return passwrod;
}
public void setPasswrod(String passwrod) {
    this.passwrod = passwrod;
}
public List<File> getFile() {
    return file;
}
public void setFile(List<File> file) {
    this.file = file;
}
public List<String> getFileFileName() {
    return fileFileName;
}
public void setFileFileName(List<String> fileFileName) {
    this.fileFileName = fileFileName;
}
public List<String> getFileContentType() {
    return fileContentType;
}
public void setFileContentType(List<String> fileContentType) {
    this.fileContentType = fileContentType;
}

@Override
public void validate() {
    System.out.println("執行了驗證器...");
    if(null==file){
        addFieldError("file", "請選擇文件!");
    }
}


@Override
public String execute() throws Exception {
    if(null==file||file.size()<=0){
        addFieldError("file", "請上傳符合格式的文件....");
        return INPUT;
    }
//獲得路么
String path=ServletActionContext.getRequest().getRealPath("upload");

for(int i=0;i<file.size();i++){
//輸入流
InputStream is=new FileInputStream(file.get(i));

//File 對象
File fileObj=new File(path,fileFileName.get(i)); 

//輸出流
OutputStream os=new FileOutputStream(fileObj);

byte [] by=new byte[400];
int length=0;
while(-1!=(length=is.read(by))){
    os.write(by,0,length);
}

os.close();
is.close();

}


    return SUCCESS;
}

}</pre>

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