我用 plus.uploader.createUpload 上传文件，返回400

var url = 'http://192.168.57.58:8080/mobileserver/mpospartner/operateCertificateUpload.action';
//反馈信息上传到网络
function qualificationUpload(f) {
task.uploader = plus.uploader.createUpload(url, {
method: 'POST',
}, function(upload, status) {
plus.nativeUI.closeWaiting();
//console.log(upload.getAllResponseHeaders());
console.log("upload cb:" + upload.responseText);
if(status == 200 && upload.stat == 4) {
var data = JSON.parse(upload.responseText); //服务器返回
//上传成功，重置表单
if(data.ret === 0 && data.desc === 'Success') {
console.log("upload success");
}
} else {
console.log(JSON.stringify(upload));
console.log(status);
}

                    });  
                    console.log(f.path);  
                    //var ss =["customerNo":"8619133295"];  
                    task.uploader.addData("customerNo", "8619133295");  
                    task.uploader.addFile(f.path, {  
                        key: 'identityFrontPhoto'  
                    });  
                    task.uploader.addFile(f.path, {  
                        key: 'identityBackPhoto'  
                    });  
                    task.uploader.addFile(f.path, {  
                        key: 'businessLicenesPhoto'  
                    });  
                    task.uploader.addFile(f.path, {  
                        key: 'businessDoorWayPhoto',  
                    });  
                    task.uploader.addFile(f.path, {  
                        key: 'businessInDoorPhoto'  
                    });  
                    task.uploader.addFile(f.path, {  
                        key: 'bankCardPhoto'  
                    });  
                    task.uploader.start();  
                    console.log('开始上传~~~');  
                    plus.nativeUI.showWaiting();  
                };  

这样的上传方式，后台的接收用 form表单的形接收的，我用html form 上传的方式是成功的，但是用 plus.uploader.createUpload总报400........