java使用zxing外掛繪製二維碼

<!-- https://mvnrepository.com/artifact/com.google.zxing/core -->

        <dependency>

            <groupId>com.google.zxing</groupId>

            <artifactId>core</artifactId>

            <version>3.3.0</version>

        </dependency>

        <!-- https://mvnrepository.com/artifact/com.google.zxing/javase -->

        <dependency>

            <groupId>com.google.zxing</groupId>

            <artifactId>javase</artifactId>

            <version>3.3.0</version>

        </dependency>

package com.example.demo.controller;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.EncodeHintType;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.WriterException;

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

import com.google.zxing.common.BitMatrix;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import java.io.OutputStream;

import java.util.HashMap;

import java.util.Map;

/**

 * 　@Description:

 * 　@author miaoying

 * 　@date 2018/6/4

 */

@Controller

public class DrawController {

    @RequestMapping("/getQrCodePic")

    public String getQrCodePic(@RequestParam("content") String content, HttpServletResponse response) throws WriterException, IOException {

        OutputStream outputStream = response.getOutputStream();

        int width = 200;

        int height = 200;

        String format = "png";

        Map<EncodeHintType, Object> hints = new HashMap<>();

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

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

        MatrixToImageWriter.writeToStream(bitMatrix, format, outputStream);

        return "qrcode";

    }

}