Implementation code _java Java Practical Verification Code

This article for everyone to share the Java Practical Verification Code implementation code, for your reference, the specific contents are as follows

1, Validcode

Package validimg;
Import Java.awt.Color;
Import java.io.IOException;
Import Java.util.Random;
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.github.bingoohuang.patchca.color.ColorFactory;
Import Com.github.bingoohuang.patchca.custom.ConfigurableCaptchaService;
Import Com.github.bingoohuang.patchca.filter.predefined.CurvesRippleFilterFactory;
Import Com.github.bingoohuang.patchca.filter.predefined.DiffuseRippleFilterFactory;
Import Com.github.bingoohuang.patchca.filter.predefined.DoubleRippleFilterFactory;
Import Com.github.bingoohuang.patchca.filter.predefined.MarbleRippleFilterFactory;
Import Com.github.bingoohuang.patchca.filter.predefined.WobbleRippleFilterFactory;
Import Com.github.bingoohuang.patchca.utils.encoder.EncoderHelper;
 
Import Com.github.bingoohuang.patchca.word.RandomWordFactory; public class VaLidcode extends HttpServlet {private static Configurablecaptchaservice cs = new Configurablecaptchaservice ();
  private static Random Random = new Random ();
  
    static {//Cs.setcolorfactory (New Singlecolorfactory (New Color (25, 60, 170)); 
        Cs.setcolorfactory (New Colorfactory () {@Override public Color getcolor (int x) {int[] c = new int[3];
        int i = Random.nextint (c.length);
          for (int fi = 0; fi < c.length fi++) {if (fi = i) {C[fi] = Random.nextint (71);
          else {C[fi] = Random.nextint (256);
      } return new Color (C[0], c[1], c[2]);
    }
    });
    randomwordfactory wf = new Randomwordfactory ();
    Wf.setcharacters ("23456789abcdefghigkmnpqrstuvwxyzABCDEFGHIGKLMNPQRSTUVWXYZ");
    Wf.setmaxlength (4);
    Wf.setminlength (4);
  Cs.setwordfactory (WF); public void doget (HttpServletRequest request, httpservletresponse response) throws Servletexception, ioexception {switch (Random.nextint (5)) {Case 0:cs.setfilterfactory (new Curvesripplefilterfactory (CS
      . Getcolorfactory ());
    Break
      Case 1:cs.setfilterfactory (New Marbleripplefilterfactory ());
    Break
      Case 2:cs.setfilterfactory (New Doubleripplefilterfactory ());
    Break
      Case 3:cs.setfilterfactory (New Wobbleripplefilterfactory ());
    Break
      Case 4:cs.setfilterfactory (New Diffuseripplefilterfactory ());
    Break
    HttpSession session = Request.getsession (false);
    if (session = NULL) {session = Request.getsession ();
    } setresponseheaders (response);
    String token = encoderhelper.getchallangeandwriteimage (cs, PNG, Response.getoutputstream ());
    Session.setattribute ("Validcode", token);
 
  System.out.println ("Current sessionid=" + session.getid () + ", Verification code =," + token); } protected void Setresponseheaders (HttpServletResponse response) {Response.setcontEnttype ("Image/png");
    Response.setheader ("Cache-control", "No-cache, No-store");
    Response.setheader ("Pragma", "No-cache");
    Long time = System.currenttimemillis ();
    Response.setdateheader ("last-modified", time);
    Response.setdateheader ("Date", time);
  Response.setdateheader ("Expires", time); public void DoPost (HttpServletRequest request, httpservletresponse response) throws Servletexception, ioexcept
 Ion {}}

2.XML Code

<dependency>
  <groupId>com.github.bingoohuang</groupId>
  <artifactId>patchca< /artifactid>
  <version>0.0.1</version>
 </dependency>
 
<servlet>
 < Servlet-name>validcode</servlet-name>
 <servlet-class>validimg.validcode</servlet-class >
</servlet>
<servlet-mapping>
 <servlet-name>ValidCode</servlet-name>
 <url-pattern>/validImg.jpg</url-pattern>
</servlet-mapping>

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