java pdf文件上传

---

1.前端需要限制上传类型   accept =".pdf" 限制只有pdf的可以上传

<form action="clientCreditQueryOrder_importFile.do" id="form2" enctype="multipart/form-data" method="post" >
   <table width="100%">
      <input id="ccqoid" hidden="hidden" />
      <tr>
         <td >附件：</td> <td ><input id="file" type="file" accept=".pdf" name="file" size="chars"></td>
      </tr>
   </table>
</form>

2，js编写

function myUpLoadFile(i){
   var form = myUp.find('form:first');
   myUp.dialog({
      title:'上传附件',
      width:'340',
      height:'160',
      buttons:[{
         text:'确定',
         handler:function(){
            console.log(i+" ------");
            $("#ccqoid").val(i);
            var file = document.getElementById('file').files[0];
            if(file == null){
               $.messager.alert('提示',"请选择上传文件");
               return false;
            }
            var a = 2;
            var b = file.size;
            var c = b/(1024 * 1024);
            if(c>a){
               $.messager.alert('提示',"上传失败，建议文件大小为2M以内");
               return false;
            }
            submitForm(i);
         }},
         {
            text:'取消',
            handler:function(){
               myUp.dialog('close');
            }
         }]
   });
   myUp.dialog('open');
}


function submitForm(i){
    var formDate=new FormData($("#form2")[0]);
    $.ajax({
        url:'upload_importFile.do?ccqoid='+i,
        type:'POST',
        data:formDate,
        async:false,
        cache:false,
        contentType:false,
        processData:false,
            success:function(data){
                if(data.success){
                    $.messager.alert('提示','导入成功!');
                    myUp.dialog('close');
                    dg.datagrid('refreshReload');
                }
            },
            error:function(returndata){
            
            }
        });
};

2。后端java代码编写

private String fileFileName;
    private File file;
    private String ccqoid;
    private String fileContentType;

    public String getFileContentType() {
        return fileContentType;
    }

    public void setFileContentType(String fileContentType) {
        this.fileContentType = fileContentType;
    }

    public String getFileFileName() {
        return fileFileName;
    }

    public void setFileFileName(String fileFileName) {
        this.fileFileName = fileFileName;
    }

    public File getFile() {
        return file;
    }

    public void setFile(File file) {
        this.file = file;
    }

    public String getCcqoid() {
        return ccqoid;
    }

    public void setCcqoid(String ccqoid) {
        this.ccqoid = ccqoid;
    }

    /**
     * 上传pdf文件  * @throws IOException
     */
    public JObject importFile() throws IOException {
        String savePath = Constants.PDF_SAVEPATH;
        String relPath = "";
        File f1 = new File(savePath);
        if (!f1.exists()) {
            f1.mkdirs();
        }
        if (fileFileName == null || ("".equals(fileFileName))) {
            throw new RuntimeException("请选择文件！");
        }
        DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
        String format = df.format(new Date());
        InputStream inputStream = new FileInputStream(file);
        byte[] data = new byte[1024];
        int len = 0;
        FileOutputStream fileOutputStream = null;
        try {
            relPath = savePath + "" + format + "-" + fileFileName;
            fileOutputStream = new FileOutputStream(relPath);
            while ((len = inputStream.read(data)) != -1) {
                fileOutputStream.write(data, 0, len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (fileOutputStream != null) {
                try {
                    fileOutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return new JResult("成功");
    }

注意：tomcat默认最多上传2M,所以如果上传文件大小超过2M就报错