IOS客服端代码

@interface ViewController ()

{

NSString *boundary;

NSString *fileParam;

NSString *baseUrl;

NSString *fileName;

}

@end

@implementation ViewController

- (void)viewDidLoad

{

[super viewDidLoad];

boundary = @"----------V2ymHFg03ehbqgZCaKO6jy";

fileParam = @"file";

baseUrl = @"http://url/from/server";

fileName = @"image.png";//此文件提前放在可读写区域

}

//请求方法

-(void)method4{

NSURL *uploadURL;

//文件路径处理(随意)

NSLog(@"请求路径为%@",uploadURL);

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void){

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];

NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:nil delegateQueue:nil];

//body

NSData *body = [self prepareDataForUpload];

//request

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:uploadURL];

[request setHTTPMethod:@"POST"];

// 以下2行是关键，NSURLSessionUploadTask不会自动添加Content-Type头

NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];

[request setValue:contentType forHTTPHeaderField: @"Content-Type"];

NSURLSessionUploadTask *uploadTask = [session uploadTaskWithRequest:request fromData:body completionHandler:^(NSData *data, NSURLResponse *response, NSError *error){

NSString *message = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"message: %@", message);

[session invalidateAndCancel];

}];

[uploadTask resume];

});

}

//生成bodyData

-(NSData*) prepareDataForUpload

{

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

NSString *uploadFilePath = [documentsDirectory stringByAppendingPathComponent:fileName];//将图片放在了documents中

NSString *lastPathfileName = [uploadFilePath lastPathComponent];

NSMutableData *body = [NSMutableData data];

NSData *dataOfFile = [[NSData alloc] initWithContentsOfFile:uploadFilePath];

if (dataOfFile) {

[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", fileParam, lastPathfileName] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[@"Content-Type: application/zip\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:dataOfFile];

[body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

}

[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

return body;

}

Java服务器端代码

//创建一个临时文件存放要上传的文件，第一个参数为上传文件大小，第二个参数为存放的临时目录

DiskFileItemFactory factory = new DiskFileItemFactory(1024*1024*5,new File("D:\\temp1"));

// 设置缓冲区大小为 5M

factory.setSizeThreshold(1024 * 1024 * 5);

// 创建一个文件上传的句柄

ServletFileUpload upload = new ServletFileUpload(factory);

//设置上传文件的整个大小和上传的单个文件大小

upload.setSizeMax(1024*1024*50);

upload.setFileSizeMax(1024*1024*5);

String[] fileExts = {"doc","zip","rar","jpg","txt"};

try { //把页面表单中的每一个表单元素解析成一个

FileItem List items = upload.parseRequest(request);

for (FileItem fileItem : items) {

//如果是一个普通的表单元素(type不是file的表单元素)

if(fileItem.isFormField()){

System.out.println(fileItem.getFieldName());

//得到对应表单元素的名字

System.out.println(fileItem.getString());

// 得到表单元素的值

}else{ //获取文件的后缀名

String fileName = fileItem.getName();//得到文件的名字

String fileExt = fileName.substring(fileName.lastIndexOf(".")+1, fileName.length());

if(Arrays.binarySearch(fileExts, fileExt)!=-1){

try { //将文件上传到项目的upload目录并命名，getRealPath可以得到该web项目下包含/upload的绝对路径//

fileItem.write(new File(request.getServletContext().getRealPath("/upload")+"/" + UUID.randomUUID().toString()+"."+fileExt));

fileItem.write(new File("D:/test2.png"));

logger.info("文件上传路径："+request.getServletContext().getRealPath("/upload")+"/" + UUID.randomUUID().toString()+"."+fileExt);

} catch (Exception e) {

e.printStackTrace();

}

}else{

System.out.println("该文件类型不能够上传");

}

}

}

} catch (FileUploadBase.SizeLimitExceededException e) {

System.out.println("整个请求的大小超过了规定的大小...");

} catch (FileUploadBase.FileSizeLimitExceededException e) {

System.out.println("请求中一个上传文件的大小超过了规定的大小...");

}catch (FileUploadException e) {

e.printStackTrace();

}