Java產生圖片驗證碼2

標籤：

Photo類

package com.baowei.utils;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.IOException;import java.util.Random;import javax.imageio.ImageIO;import javax.servlet.http.HttpServletResponse;public class Photo {    private static final int width = 120;    private static final int height = 25;    private HttpServletResponse response;    private String randomData = "";    public Photo(HttpServletResponse response) {        this.response = response;    }    public void createImage() throws IOException {        // 1、在記憶體裡面建立一個圖片        BufferedImage bimage = new BufferedImage(width, height,                BufferedImage.TYPE_INT_RGB);        // 2.1得到圖片        Graphics g = bimage.getGraphics();        // 2.2設定圖片的背景顏色        setBackground(g);        // 3、設定圖片邊框        setBorder(g);        // 4、設定圖片幹擾線        setLine(g);        // 5、向圖片寫資料        setRandomData(g);        // 6、將圖片寫給客戶機        response.setContentType("image/jpeg");        ImageIO.write(bimage, "jpg", response.getOutputStream());    }    public void setBackground(Graphics g) {        Color color = g.getColor();        g.setColor(Color.WHITE);        g.fillRect(0, 0, width, height);        g.setColor(color);    }    public void setBorder(Graphics g) {        Color color = g.getColor();        g.setColor(Color.BLUE);        g.drawRect(1, 1, width - 2, height - 2);        g.setColor(color);    }    public void setLine(Graphics g) {        for (int i = 0; i < 4; i++) {            // 此處獲得到的x,y應該與上面的圖片的寬高關聯起來            int x1 = new Random().nextInt(width);            int x2 = new Random().nextInt(width);            int y1 = new Random().nextInt(height);            int y2 = new Random().nextInt(height);            Color color = g.getColor();            g.setColor(Color.GREEN);            g.drawLine(x1, y1, x2, y2);            g.setColor(color);        }    }    public void setRandomData(Graphics g) {        // 擷取隨機的資料        // String data = "";        for (int i = 0; i < 4; i++) {            randomData += new Random().nextInt(10) + " ";        }        // 設定資料的字型和顏色        Color color = g.getColor();        g.setColor(Color.RED);        g.setFont(new Font("宋體", Font.BOLD, 20));        g.drawString(randomData, 20, 20);        g.setColor(color);    }        public String getRandomData() {        String data[] = randomData.split(" ");        String returnData = "";        for (int i = 0; i < data.length; i++) {            returnData += data[i];        }                return returnData;    }}

Demo01測試用的servlet

package com.baowei.servlet;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.IOException;import java.util.Random;import javax.imageio.ImageIO;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import com.baowei.utils.Photo;public class Demo01 extends HttpServlet {        public void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        doPost(request, response);    }    public void doPost(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        response.setHeader("Pragma", "No-cache");        response.setHeader("Cache-Control", "no-cache");        response.setDateHeader("Expires", 0);        response.setContentType("image/jpeg");        Photo pt = new Photo(response);        pt.createImage();        System.out.println(pt.getRandomData());        String data = pt.getRandomData();        // 存入會話session        //HttpSession session = request.getSession(true);        //session.setAttribute("data", data);        getServletContext().setAttribute("data", data);    }}

 

Java產生圖片驗證碼2