struts2 单个文件上传的三种方法以及多文件上传

<!--[if !supportLists]-->1、
<!--[endif]-->填加JAR包：commons-fileupload-1.2.1.jar
、connons-io-1.3.2.jar放在WEB-INF/lib下
2、在from表单增加enctype属性<form action=”” method=””
enctype=”multipart/form-data”
3、Struts.xml配置文件中引入上传文件的配置
<include file=”cn/csdn/struts2/xml/file/struts-upload.xml”></include>
4、Struts-upload.xml配置文件中填加上传的action处理.并且初始化上传文件路径参数

<!-- 上传文件action的处理 -->

Xml代码

<action name="uploadfile" class="cn.csdn.action.GoodsAction2" method="uploadfile">
<!-- 初始化文件保存路径参数为/uploads -->
<param name="savePath">/uploads</param>
<result name="success">/ac.jsp</result>
</action>

<action name="uploadfile" class="cn.csdn.action.GoodsAction2" method="uploadfile">
<!-- 初始化文件保存路径参数为/uploads -->
<param name="savePath">/uploads</param>
<result name="success">/ac.jsp</result>
</action>

以上是准备工作 ，做好之后就是上传功能的实现

第一种方法：用字节流实现

核心代码：

Java代码

private String savePath;
private String title;
private File pic;// 文件名 与视图层的名称一致

private String picContentType;//文件名+ContentType

private String picFileName;//文件名+FileName

public String getSavePath() {
return ServletActionContext.getServletContext().getRealPath(savePath);
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public File getPic() {
return pic;
}
public void setPic(File pic) {
this.pic = pic;
}
public String getPicContentType() {
return picContentType;
}
public void setPicContentType(String picContentType) {
this.picContentType = picContentType;
}
public String getPicFileName() {
return picFileName;
}
public void setPicFileName(String picFileName) {
this.picFileName = picFileName;
}
//文件上传功能实现：方法一：字节流
public String uploadfile(){
System.out.println("getSavePath()"+getSavePath());
System.out.println("savePath:"+savePath);
System.out.println("title:"+title);
System.out.println("pic:"+pic);
System.out.println("picContentType:"+picContentType);
System.out.println("picFileName:"+picFileName);

FileInputStream fis=null;
FileOutputStream fos=null;
//定义保存的路径
String savepath=getSavePath();

//根据路径创建文件路径对象
File file=new File(savepath);
if(!file.exists()){
file.mkdirs();
}

try {
//创建输入流
fis=new FileInputStream(pic);
//创建输出流
fos=new FileOutputStream(savepath+"//"+picFileName);

byte buf[]=new byte[1024];
int n=0;
while((n=fis.read(buf))!=-1){
fos.write(buf, 0, n);
}
if(fis!=null){
fis.close();
}
if(fos!=null){
fos.close();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block

e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block

e.printStackTrace();
}
return SUCCESS;
}

private String savePath;
private String title;
private File pic;// 文件名   与视图层的名称一致
private String picContentType;//文件名+ContentType
private String picFileName;//文件名+FileName

public String getSavePath() {
return ServletActionContext.getServletContext().getRealPath(savePath);
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public File getPic() {
return pic;
}
public void setPic(File pic) {
this.pic = pic;
}
public String getPicContentType() {
return picContentType;
}
public void setPicContentType(String picContentType) {
this.picContentType = picContentType;
}
public String getPicFileName() {
return picFileName;
}
public void setPicFileName(String picFileName) {
this.picFileName = picFileName;
}
//文件上传功能实现：方法一：字节流
public String uploadfile(){
System.out.println("getSavePath()"+getSavePath());
System.out.println("savePath:"+savePath);
System.out.println("title:"+title);
System.out.println("pic:"+pic);
System.out.println("picContentType:"+picContentType);
System.out.println("picFileName:"+picFileName);

FileInputStream fis=null;
FileOutputStream fos=null;
//定义保存的路径
String savepath=getSavePath();

//根据路径创建文件路径对象
File file=new File(savepath);
if(!file.exists()){
file.mkdirs();
}

try {
//创建输入流
fis=new FileInputStream(pic);
//创建输出流
fos=new FileOutputStream(savepath+"//"+picFileName);

byte buf[]=new byte[1024];
int n=0;
while((n=fis.read(buf))!=-1){
fos.write(buf, 0, n);
}
if(fis!=null){
fis.close();
}
if(fos!=null){
fos.close();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return SUCCESS;
}

第二种方法：用FileUtils

核心代码：

Java代码

// 文件上传功能实现：方法二:FileUtils public String uploadfile() { // 定义保存的路径 String savepath = getSavePath(); // 根据路径创建文件路径对象 File file = new File(savepath); if (!file.exists()) { file.mkdirs(); } try { FileUtils.copyFile(pic, new File(file, getPicFileName())); } catch (Exception ex) { ex.printStackTrace(); } return SUCCESS; }

// 文件上传功能实现：方法二:FileUtils
public String uploadfile() {
// 定义保存的路径
String savepath = getSavePath();

// 根据路径创建文件路径对象
File file = new File(savepath);
if (!file.exists()) {
file.mkdirs();
}

try {
FileUtils.copyFile(pic, new File(file, getPicFileName()));
} catch (Exception ex) {
ex.printStackTrace();
}
return SUCCESS;
}

第三种方法：三层管道

核心代码：

Java代码

// 文件上传功能实现：方法三：三层管道
public String uploadfile() {

BufferedReader br = null;
BufferedWriter bw = null;

// 定义保存的路径
String savepath = getSavePath();

// 根据路径创建文件路径对象
File file = new File(savepath);
if (!file.exists()) {
file.mkdirs();
}

try {
// 创建输入流
br = new BufferedReader(new InputStreamReader(new FileInputStream(
pic)));
// 创建输出流
bw = new BufferedWriter(new OutputStreamWriter(
new FileOutputStream(file + "//" + getPicFileName())));

char buf[] = new char[1024];
int n = 0;
while ((n = br.read(buf)) != -1) {
bw.write(buf, 0, n);
}
if (br != null) {
br.close();
}
if (bw != null) {
bw.close();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block

e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block

e.printStackTrace();
}
return SUCCESS;
}

// 文件上传功能实现：方法三：三层管道
public String uploadfile() {

BufferedReader br = null;
BufferedWriter bw = null;

// 定义保存的路径
String savepath = getSavePath();

// 根据路径创建文件路径对象
File file = new File(savepath);
if (!file.exists()) {
file.mkdirs();
}

try {
// 创建输入流
br = new BufferedReader(new InputStreamReader(new FileInputStream(
pic)));
// 创建输出流
bw = new BufferedWriter(new OutputStreamWriter(
new FileOutputStream(file + "//" + getPicFileName())));

char buf[] = new char[1024];
int n = 0;
while ((n = br.read(buf)) != -1) {
bw.write(buf, 0, n);
}
if (br != null) {
br.close();
}
if (bw != null) {
bw.close();
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return SUCCESS;
}

三种比较 ，笔者认为还是第二种比较简单。

会了单文件上传，多文件上传就简单了。只需要把获得文件、文件类型、文件名称 定义声明时定义为数组的就可以了

核心代码：

Java代码

private String savePath;
private String title;
private File[] pic;// 文件名 与视图层的名称一致

private String[] picContentType;// 文件名+ContentType

private String[] picFileName;// 文件名+FileName

public String getSavePath() {
return ServletActionContext.getServletContext().getRealPath(savePath);
}

public void setSavePath(String savePath) {
this.savePath = savePath;
}

public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

public File[] getPic() {
return pic;
}

public void setPic(File[] pic) {
this.pic = pic;
}

public String[] getPicContentType() {
return picContentType;
}

public void setPicContentType(String[] picContentType) {
this.picContentType = picContentType;
}

public String[] getPicFileName() {
return picFileName;
}

public void setPicFileName(String[] picFileName) {
this.picFileName = picFileName;
}

// 文件上传功能实现：多文件上传
public String uploadfiles() {
// 定义保存的路径
String savepath = getSavePath();

// 根据路径创建文件路径对象
File file = new File(savepath);
if (!file.exists()) {
file.mkdirs();
}

try {
for(int i=0;i<pic.length;i++){
FileUtils.copyFile(pic[i], new File(file, getPicFileName()[i]));
}

} catch (Exception ex) {
ex.printStackTrace();
}
return SUCCESS;
}

}