JAVA生成二维码输出jsp页面
SpringMVC 生成二维码输出到jsp页面：
1.引用Google生成二维码的jar包：zxing.jar
（注意：jdk1.6 需要引用2.3.0以下版本，引用新的3.3.0版本包需要jdk1.7+）
使用maven配置3.3.0版本的zxing.jar
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.0</version>
</dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.0</version>
</dependency>
使用maven配置2.3.0版本的zxing.jar
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>2.3.0</version>
</dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>2.3.0</version>
</dependency>
2.生成二维码代码：
import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Hashtable;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
/***************************************************************************
* <pre>生成二维码工具类</pre>
* @文件名称: QRCodeTool.java
* @包 路 径：
* @版权所有：2017
*
* @类描述:
* @版本: V2.0
* @创建人：
* @创建时间：2017年8月16日 下午2:58:58
***************************************************************************/
public class QRCodeTool {
private static final String CHARSET = "UTF-8"; // 字符集格式
public static final String FORMAT_NAME = "JPG"; // 二维码图片格式
private static final int QRCODE_SIZE = 100; // 二维码尺寸
private static final int WIDTH = 60; // LOGO宽度
private static final int HEIGHT = 60; // LOGO高度
/**
* <p>生成二维码图片</p>
* @Description:
* @param content
* @return
* @throws Exception
*/
public static BufferedImage createImage(String content) throws Exception {
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
hints.put(EncodeHintType.MARGIN, 1);
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
int width = bitMatrix.getWidth();
int height = bitMatrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
}
}
insertImage(image, "D:/logo.jpg", true); // 生成的二维码中添加logo
return image;
}
/**
* <p>二维码中添加LOGO</p>
* @Description:
* @param source 二维码
* @param imgPath 需要添加的logo图片路径
* @param needCompress 是否压缩logo true/false
* @throws Exception
*/
public static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
File file = new File(imgPath);
if (!file.exists()) {
System.err.println("" + imgPath + " 该文件不存在！");
return;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 压缩LOGO
if (width > WIDTH) {
width = WIDTH;
}
if (height > HEIGHT) {
height = HEIGHT;
}
Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(image, 0, 0, null); // 绘制缩小后的图
g.dispose();
src = image;
}
// 插入LOGO
Graphics2D graph = source.createGraphics();
int x = (QRCODE_SIZE - width) / 2;
int y = (QRCODE_SIZE - height) / 2;
graph.drawImage(src, x, y, width, height, null);
Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
graph.setStroke(new BasicStroke(3f));
graph.draw(shape);
graph.dispose();
}
}
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Hashtable;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
/***************************************************************************
* <pre>生成二维码工具类</pre>
* @文件名称: QRCodeTool.java
* @包 路 径：
* @版权所有：2017
*
* @类描述:
* @版本: V2.0
* @创建人：
* @创建时间：2017年8月16日 下午2:58:58
***************************************************************************/
public class QRCodeTool {
private static final String CHARSET = "UTF-8"; // 字符集格式
public static final String FORMAT_NAME = "JPG"; // 二维码图片格式
private static final int QRCODE_SIZE = 100; // 二维码尺寸
private static final int WIDTH = 60; // LOGO宽度
private static final int HEIGHT = 60; // LOGO高度
/**
* <p>生成二维码图片</p>
* @Description:
* @param content
* @return
* @throws Exception
*/
public static BufferedImage createImage(String content) throws Exception {
Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
hints.put(EncodeHintType.MARGIN, 1);
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
int width = bitMatrix.getWidth();
int height = bitMatrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
}
}
insertImage(image, "D:/logo.jpg", true); // 生成的二维码中添加logo
return image;
}
/**
* <p>二维码中添加LOGO</p>
* @Description:
* @param source 二维码
* @param imgPath 需要添加的logo图片路径
* @param needCompress 是否压缩logo true/false
* @throws Exception
*/
public static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {
File file = new File(imgPath);
if (!file.exists()) {
System.err.println("" + imgPath + " 该文件不存在！");
return;
}
Image src = ImageIO.read(new File(imgPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 压缩LOGO
if (width > WIDTH) {
width = WIDTH;
}
if (height > HEIGHT) {
height = HEIGHT;
}
Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
g.drawImage(image, 0, 0, null); // 绘制缩小后的图
g.dispose();
src = image;
}
// 插入LOGO
Graphics2D graph = source.createGraphics();
int x = (QRCODE_SIZE - width) / 2;
int y = (QRCODE_SIZE - height) / 2;
graph.drawImage(src, x, y, width, height, null);
Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
graph.setStroke(new BasicStroke(3f));
graph.draw(shape);
graph.dispose();
}
}
3.SpringMVC controller实现
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/***************************************************************************
* <pre>生成二维码</pre>
* @文件名称: QRCodeController.java
* @包 路 径：
* @版权所有：
*
* @类描述:
* @版本: V2.0
* @创建人：
* @创建时间：2017年8月16日 下午4:23:45
***************************************************************************/
@Controller
@RequestMapping(value = "/QRCode")
public class QRCodeController {
/**
* <p>二维码内容</p>
* @Description:
* @param request
* @param response
* @throws Exception
*/
@RequestMapping("/getQRCode")
public void getQRCode(HttpServletRequest request,HttpServletResponse response) throws Exception{
String content = "http://www.bjca.org.cn/";
encode(content, response);
}
/**
* <p>生成二维码输出页面</p>
* @Description:
* @param content
* @param response
* @throws Exception
*/
public static void encode(String content,HttpServletResponse response) throws Exception {
BufferedImage image = QRCodeTool.createImage(content);
ImageIO.write(image, QRCodeTool.FORMAT_NAME, response.getOutputStream());
}
}
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/***************************************************************************
* <pre>生成二维码</pre>
* @文件名称: QRCodeController.java
* @包 路 径：
* @版权所有：
*
* @类描述:
* @版本: V2.0
* @创建人：
* @创建时间：2017年8月16日 下午4:23:45
***************************************************************************/
@Controller
@RequestMapping(value = "/QRCode")
public class QRCodeController {
/**
* <p>二维码内容</p>
* @Description:
* @param request
* @param response
* @throws Exception
*/
@RequestMapping("/getQRCode")
public void getQRCode(HttpServletRequest request,HttpServletResponse response) throws Exception{
String content = "http://www.bjca.org.cn/";
encode(content, response);
}
/**
* <p>生成二维码输出页面</p>
* @Description:
* @param content
* @param response
* @throws Exception
*/
public static void encode(String content,HttpServletResponse response) throws Exception {
BufferedImage image = QRCodeTool.createImage(content);
ImageIO.write(image, QRCodeTool.FORMAT_NAME, response.getOutputStream());
}
}
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/***************************************************************************
* <pre>生成二维码</pre>
* @文件名称: QRCodeController.java
* @包 路 径： cn.org.bjca.seal.esspdf.platform.tools
* @版权所有：北京数字认证股份有限公司 (C) 2017
*
* @类描述:
* @版本: V2.0
* @创建人： dongxiaobing
* @创建时间：2017年8月16日 下午4:23:45
***************************************************************************/
@Controller
@RequestMapping(value = "/QRCode")
public class QRCodeController {
/**
* <p>映射二维码生成页面</p>
* @Description:
* @param request
* @return
*/
@RequestMapping("")
public String indexJsp(HttpServletRequest request){
return "index";
}
/**
* <p>二维码内容</p>
* @Description:
* @param request
* @param response
* @throws Exception
*/
@RequestMapping("/getQRCode")
public void getQRCode(HttpServletRequest request,HttpServletResponse response) throws Exception{
String content = "http://www.baidu.com/";
encode(content, response);
}
/**
* <p>生成二维码输出页面</p>
* @Description:
* @param content
* @param response
* @throws Exception
*/
public static void encode(String content,HttpServletResponse response) throws Exception {
BufferedImage image = QRCodeTool.createImage(content);
ImageIO.write(image, QRCodeTool.FORMAT_NAME, response.getOutputStream());
}
}
4.Jsp页面展示二维码
<img style="float:right" alt="扫描二维码，将统计数据上传至运营系统。" src="${ctx}/QRCode/getQRCode">