程序运行正常 但是就是不能生成二维码

package com.zxing;

import java.io.File;

import java.nio.file.Path;

import java.util.HashMap;

import com.google.zxing.*;

import com.google.zxing.client.j2se.MatrixToImageWriter;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

public class CreatQRcode {

public static void main(String[] args) {

// TODO 自动生成的方法存根

int width=300;

int height=300;

String format = "png";

String contents = "www.immoc.com";

//定义二维码的参数

HashMap hints = new HashMap();

hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

hints.put(EncodeHintType.ERROR_CORRECTION,ErrorCorrectionLevel.M);

hints.put(EncodeHintType.MARGIN, 2);

//生成二维码

try {

BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height,hints);

Path file  = new File("D:/eclipse/immoc.png").toPath();

MatrixToImageWriter.writeToPath(bitMatrix, format, file);

} catch (Exception e) {

// TODO 自动生成的 catch 块

e.printStackTrace();

}

}

}