java 實現圖片合成，并添加文字

更新時間：2020年12月15日 10:30:31 作者：阿若蜜意

這篇文章主要介紹了java 實現圖片合成，并添加文字的示例，幫助大家更好的利用Java處理圖片，感興趣的朋友可以了解下

最近公司一個需要，需要把商品的優(yōu)惠卷分享鏈接，生成一個二維碼然后和商品主圖合成一張，并且在新合成的主圖增加商品信息的描述，好了直接看合成后圖片的樣式

下面我就直接貼代碼，首先是Contorller層

/**
   * 淘寶二維碼，商品主圖，合成一張圖
   * 
   * @param pictUrl
   * @param request
   * @param response
   * @throws IOException
   */
  @RequestMapping("/getTaoBaoqQRCode")
  public void getTaoBaoqQRCode(TaoBaoQRCode taoBaoQRCode, HttpServletRequest request,
      HttpServletResponse response) throws IOException {
    ServletOutputStream os = null;
    InputStream buffin = null;
    try {
      // 二維碼
      String couponUlr = "https:" + taoBaoQRCode.getCouponShareUrl();// 高額卷分享鏈接
      byte[] imgByte = QrCodeUtil.createQrCode2Bytes(250, 250, couponUlr);
      buffin = new ByteArrayInputStream(imgByte);
      BufferedImage couponImage = ImageIO.read(buffin);
      // 商品主圖
      String imageUrl = "https:" + taoBaoQRCode.getPictUrl();
      URL url = new URL(imageUrl);
      BufferedImage picImage = ImageIO.read(url);
      BufferedImage modifyImage =
          imageHandleUtil.mergeImage(picImage, couponImage, taoBaoQRCode.getTitle(),
              taoBaoQRCode.getReservePrice(), taoBaoQRCode.getZkFinalPrice());
      response.setContentType("image/jpg");
      os = response.getOutputStream();
      ImageIO.write(modifyImage, "jpg", os);
      os.flush();
    } catch (Exception e) {
      LOGGER.error("getTaoBaoqQRCode error");
      e.printStackTrace();
    } finally {
      buffin.close();
      os.close();
    }
  }

二維碼QrCodeUtil 生成幫助類

public class QrCodeUtil {
  private static final int DAFAULT_WIDTH = 360;
  private static final int DAFAULT_HEIGHT = 360;

  private static final Logger LOGGER = LoggerFactory.getLogger(QrCodeUtil.class);

  public static String createQrCode(String text) {
    return createQrCode(DAFAULT_WIDTH, DAFAULT_HEIGHT, text);
  }

  public static String createQrCode(int widht, int height, String text) {
    HashMap<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>();
    hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
    try {
      byte[] bytes = createQrCode2Bytes(widht, height, text);
      String fileName = UUID.randomUUID().toString().replaceAll("-", "") + ".png";
      return UpYunClient.upload(fileName, bytes);
    } catch (Exception e) {
      LOGGER.error("create qrcode error", e);
    }
    return null;
  }


  public static byte[] createQrCode2Bytes(String text) {
    return createQrCode2Bytes(DAFAULT_WIDTH, DAFAULT_HEIGHT, text);
  }

  public static byte[] createQrCode2Bytes(int widht, int height, String text) {
    HashMap<EncodeHintType, String> hints = new HashMap<EncodeHintType, String>();
    hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
    try {
      BitMatrix bitMatrix =
          new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, widht, height,
              hints);
      ByteArrayOutputStream out = new ByteArrayOutputStream();
      BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix);
      ImageIO.write(image, "png", out);
      return out.toByteArray();
    } catch (Exception e) {
      LOGGER.error("create qrcode error", e);
    }
    return null;
  }

  /**
   * 生成條形碼并已字節(jié)碼形式返回，生成的圖片格式為png
   * 
   * @param contents
   * @param width
   * @param height
   * @return
   */
  public static byte[] createBarcode2Byte(String contents, int width, int height) {
    int codeWidth = 3 + // start guard
        (7 * 6) + // left bars
        5 + // middle guard
        (7 * 6) + // right bars
        3; // end guard
    codeWidth = Math.max(codeWidth, width);
    try {
      BitMatrix bitMatrix =
          new MultiFormatWriter().encode(contents, BarcodeFormat.CODE_128, codeWidth,
              height, null);
      BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix);
      ByteArrayOutputStream out = new ByteArrayOutputStream();
      ImageIO.write(image, "png", out);
      return out.toByteArray();
    } catch (Exception e) {
      e.printStackTrace();
    }
    return null;
  }
}

二維碼生成我這里用的是谷歌的看下面maven pom.xml 文件

<!-- 條形碼、二維碼生成 -->
    <dependency>
      <groupId>com.google.zxing</groupId>
      <artifactId>core</artifactId>
      <version>2.2</version>
    </dependency>
    <dependency>
      <groupId>com.google.zxing</groupId>
      <artifactId>javase</artifactId>
      <version>2.2</version>
    </dependency>

合成圖片方法如何

package com.qft.campuscircle.common.util;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import org.springframework.stereotype.Component;

@Component
public class ImageHandleUtil {
  private Font font = null;
  private Graphics2D g = null;

  /**
   * 導入本地圖片到緩沖區(qū)
   * 
   * @param imgName
   * @return
   */
  public BufferedImage loadImageLocal(String imgName) {
    try {
      return ImageIO.read(new File(imgName));
    } catch (IOException e) {
      e.printStackTrace();
    }
    return null;
  }

  /**
   * 導入網絡圖片到緩沖區(qū)
   * 
   * @param imgName
   * @return
   */
  public BufferedImage loadImageUrl(String imgName) {
    try {
      URL url = new URL(imgName);
      return ImageIO.read(url);
    } catch (IOException e) {
      e.printStackTrace();
    }
    return null;
  }

  /**
   * 生成新圖片到本地
   * 
   * @param newImage
   * @param img
   */
  public void writeImageLocal(String newImage, BufferedImage img) {
    if (newImage != null && img != null) {
      try {
        // 目錄不存在則創(chuàng)建
        String dirUrl = newImage.substring(0, newImage.lastIndexOf(File.separator));
        File dir = new File(dirUrl);
        if (!dir.exists()) {
          dir.mkdirs();
        }
        File outputfile = new File(newImage);
        ImageIO.write(img, "png", outputfile);
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }

  /**
   * 設定文字的字體等
   * 
   * @param fontStyle
   * @param fontSize
   */
  public void setFont(String name, int style, int fontSize) {
    this.font = new Font(name, style, fontSize);
  }

  /**
   * 修改圖片,返回修改后的圖片緩沖區(qū)（只輸出一行文本）,圖片居中顯示
   * 
   * @param img
   * @param content
   * @param y
   * @param color
   * @return
   */
  public BufferedImage modifyImage(BufferedImage img, Object content, int y, Color color) {
    try {
      g = img.createGraphics();
      g.setBackground(Color.WHITE);
      g.setColor(color);// 設置字體顏色
      g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);// 抗鋸齒
      if (this.font != null)
        g.setFont(this.font);
      int width = img.getWidth();// 圖片寬度
      if (content != null) {
        String str = content.toString();
        int strWidth = g.getFontMetrics().stringWidth(str);// 字體寬度
        g.drawString(str, (width - strWidth) / 2, y);
      }
      g.dispose();
    } catch (Exception e) {
      e.printStackTrace();
    }
    return img;
  }

  public BufferedImage modifyImage(BufferedImage img, Object content, int x, int y, Color color) {
    try {
      g = img.createGraphics();
      g.setBackground(Color.WHITE);
      g.setColor(color);// 設置字體顏色
      g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);// 抗鋸齒
      if (this.font != null)
        g.setFont(this.font);
      if (content != null) {
        String str = content.toString();
        g.drawString(str, x, y);
      }
      g.dispose();
    } catch (Exception e) {
      e.printStackTrace();
    }
    return img;
  }

  /**
   * 將一張圖片畫在另一張圖片上
   * 
   * @param addImage 被添加的圖片
   * @param sourceImg 源圖
   * @param x
   * @param y
   * @param width
   * @param height
   * @return
   */
  public BufferedImage modifyImagetogeter(BufferedImage addImage, BufferedImage sourceImg, int x,
      int y) {
    int width = addImage.getWidth();
    int height = addImage.getHeight();
    try {
      g = sourceImg.createGraphics();
      g.drawImage(addImage, x, y, width, height, null);
      g.dispose();
    } catch (Exception e) {
      e.printStackTrace();
    }
    return sourceImg;
  }
  /**
   * 
   * @param img1 
   * @param img2
   * @param title 標題
   * @param reservePrice 現價
   * @param zkFinalPrice 折扣價
   * @return BufferedImage
   * @throws IOException
   */
  public BufferedImage mergeImage(BufferedImage img1, BufferedImage img2,String title,String reservePrice,String zkFinalPrice)
      throws IOException {
    Font font = new Font("微軟雅黑", Font.BOLD, 20);
    int w1 = img1.getWidth();
    int h1 = img1.getHeight();
    int w2 = img2.getWidth();
    int h2 = img2.getHeight();
    BufferedImage newImage = new BufferedImage(w1, h2 + h1 + h2/2, BufferedImage.TYPE_INT_RGB);// 新的圖
    Graphics2D graphics = (Graphics2D) newImage.getGraphics();
    graphics.setBackground(Color.WHITE);
    graphics.fillRect(0, 0, newImage.getWidth(), newImage.getHeight());
    graphics.drawImage(img1, 0, 0, null);
    graphics.drawImage(img2, (newImage.getWidth()) / 2 - (w2 / 2), newImage.getHeight() - h2,
        null);
    graphics.setFont(font);
    graphics.setColor(Color.BLACK);
    int width = graphics.getFontMetrics(font).stringWidth(title);
    int startY = h1 + 30;
    if (width > newImage.getWidth()) {
      char[] array = title.toCharArray();
      StringBuilder sb = new StringBuilder(array[0]);
      for (char c : array) {
        sb.append(c);
        int newWidth = graphics.getFontMetrics(font).stringWidth(sb.toString());
        if ((newWidth + 19) >= newImage.getWidth()) {// 準備換行
          graphics.drawString(sb.toString(), 0, startY);
          startY += 30;
          sb.delete(0, sb.length());
        }
      }
      graphics.drawString(sb.toString(), 0, startY);
    } else {
      graphics.drawString(title, 0, startY);
    }
    graphics.drawString("現價￥"+reservePrice, 0, startY + 30);
    startY += 30;
    graphics.drawString("卷后價￥"+zkFinalPrice, 0, startY + 30);
    return newImage;
  }
}

兩個幫助類里面有很多方法沒用到，大家只要看幾個關鍵的方法就可以了，TaoBaoQRCode 對象里面的屬性我就沒列出來了，大家自己根據自己的需求而定

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