Struts2文件的上传
Struts2文件的上传
文件的上传和下载分为单个文件上传和多个文件上传
一 单个的文件上传
.1．首先写一个jsp页面：
<body>
<div align="center">
<h1>单个文件上传和多个文件上传</h1>
<form action="${pageContext.request.contextPath}/csdn/upFile.action" enctype="multipart/form-data" method="post">
上传文件：<input type="file" name="upload"/>
<input type="submit" value="上传"/>
</form>
</div>
</body>
2．访问到的struts.xml文件
<?xml version="1.0" encoding="GBK"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<package name="upload" namespace="/csdn" extends="struts-default">
<action name="upFile" class="cn.csdn.hr.up.action.UploadAction" method="upload">
<result>../success.jsp</result>
</action>
</package>
</struts>
3．访问到UploadAction.java的action
package cn.csdn.hr.up.action;
import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class UploadAction extends ActionSupport {
private static final long serialVersionUID = 1L;
/**
都是规定，File的对象和input中的name(xxx)相同，文件类型和文件名都是xxxContextType,xxxFileName
*/
// 得到上传文件的名称一定与name值一直
private File upload;
// 上传文件的类型 ContentType
private String uploadContentType;
// 上传文件的名称
private String uploadFileName;
public File getUpload() {
return upload;
}
public void setUpload(File upload) {
this.upload = upload;
}
public String getUploadContentType() {
return uploadContentType;
}
public void setUploadContentType(String uploadContentType) {
this.uploadContentType = uploadContentType;
}
public String getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
public static long getSerialversionuid() {
return serialVersionUID;
}
public String upload() {
String path = ServletActionContext.getServletContext().getRealPath(
"/upload");
// 写到指定路径
File file = new File(path);
//判断指定的路径下是否有uplaod，如果没有，自动创建
if (!file.exists()) {
file.mkdirs();
}
try {
FileUtils.copyFile(upload, new File(file, uploadFileName));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return SUCCESS;
}
}
二 多个文件的上传
多个文件的上传不同的是在action中的获取到的是数组或者是list集合
数组的action为：
package cn.csdn.hr.up.action;
import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class UploadsAction extends ActionSupport {
private static final long serialVersionUID = 1L;
// 得到上传文件的名称一定与name值一直
private File upload[];
// 上传文件的类型 ContentType
private String uploadContentType[];
// 上传文件的名称
private String uploadFileName[];
public File[] getUpload() {
return upload;
}
public void setUpload(File[] upload) {
this.upload = upload;
}
public String[] getUploadContentType() {
return uploadContentType;
}
public void setUploadContentType(String[] uploadContentType) {
this.uploadContentType = uploadContentType;
}
public String[] getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String[] uploadFileName) {
this.uploadFileName = uploadFileName;
}
public static long getSerialversionuid() {
return serialVersionUID;
}
public String uploads() {
String path = ServletActionContext.getServletContext().getRealPath(
"/upload");
// 写到指定路径
File file = new File(path);
//判断指定的路径下是否有uplaod，如果没有，自动创建
if (!file.exists()) {
file.mkdirs();
}
try {
for(int i = 0;i<upload.length;i++){
FileUtils.copyFile(upload[i], new File(file, uploadFileName[i]));
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("上传文件的名称:" + uploadFileName + "上传的路径:" + path
+ "上传的类型:" + uploadContentType);
return SUCCESS;
}
}
List集合的action为：；
package cn.csdn.hr.up.action;
import java.io.File;
import java.io.IOException;
import java.util.List;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class UploadListAction extends ActionSupport {
private static final long serialVersionUID = 1L;
// 得到上传文件的名称一定与name值一直
private List<File> upload;
// 上传文件的类型 ContentType
private List<String> uploadContentType;
// 上传文件的名称
private List<String> uploadFileName;
public List<File> getUpload() {
return upload;
}
public void setUpload(List<File> upload) {
this.upload = upload;
}
public List<String> getUploadContentType() {
return uploadContentType;
}
public void setUploadContentType(List<String> uploadContentType) {
this.uploadContentType = uploadContentType;
}
public List<String> getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(List<String> uploadFileName) {
this.uploadFileName = uploadFileName;
}
public static long getSerialversionuid() {
return serialVersionUID;
}
public String uploadList() {
String path = ServletActionContext.getServletContext().getRealPath(
"/upload");
// 写到指定路径
File file = new File(path);
// 判断指定的路径下是否有uplaod，如果没有，自动创建
if (!file.exists()) {
file.mkdirs();
}
try {
for (int i = 0; i < upload.size(); i++) {
FileUtils.copyFile(upload.get(i), new File(file, uploadFileName
.get(i)));
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("上传文件的名称:" + uploadFileName + "上传的路径:" + path
+ "上传的类型:" + uploadContentType);
return SUCCESS;
}
}