import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.PrintWriter;
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;
public class RadomCodeServlet 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 {
//讄面不缓?br /> response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", 0);
//在内存中创徏图象
int width=60, height=20;
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
//获取囑Ş上下?br /> Graphics g = image.getGraphics();
//生成随机c?br /> Random random = new Random();
//讑֮背景?br /> g.setColor(getRandColor(200,250));
g.fillRect(0, 0, width, height);
//讑֮字体
g.setFont(new Font("Times New Roman",Font.PLAIN,18));
//随机产生155条干扰线Q图象中的认证码不易被其它E序探测?br /> g.setColor(getRandColor(160,200));
for (int i=0;i<155;i++)
{
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x,y,x+xl,y+yl);
}
//取随Z生的认证?4位数?
String sRand="";
for (int i=0;i<4;i++)
{
String rand=String.valueOf(random.nextInt(10));
sRand+=rand;
// 认证码昄到图象中
g.setColor(new Color(20+random.nextInt(110),20+random.nextInt(110),20+random.nextInt(110)));//调用函数出来的颜色相同，可能是因为种子太接近Q所以只能直接生?br /> g.drawString(rand,13*i+6,16);
}
//认证码存入SESSION
request.getSession().setAttribute("rand",sRand);
//图象生效
g.dispose();
//输出图象到页?br /> ImageIO.write(image, "JPEG", response.getOutputStream());
}
//l定范围获得随机颜色
private Color getRandColor(int fc,int bc)
{
Random random = new Random();
if(fc>255) fc=255;
if(bc>255) bc=255;
int r=fc+random.nextInt(bc-fc);
int g=fc+random.nextInt(bc-fc);
int b=fc+random.nextInt(bc-fc);
return new Color(r,g,b);
}
调用:
<td height="25">
<div align="right">
<font color="#000000">验证码：</font>
</div>
</td>
<td align="left">
<input type="text" name="randCode" size=10></input>
<img style="cursor:hand" name="validatecode"
src=" servlet/RadomCodeServlet" height="17" align="middle"
onclick="document.validatecode.src=' servlet/RadomCodeServlet'">
</td>
]]>
public class MD5
{
private static MD5 md5 = null;
private MD5(){}
public static MD5 getInstance()
{
if (md5 == null)
{
md5 = new MD5();
}
return md5;
}
/**
* Description:encrypt the String by "MD5"
* @param str String
* @return String
*/
public String calcMD5(String str)
{
try
{
MessageDigest alga = MessageDigest.getInstance("MD5");
alga.update(str.getBytes());
byte[] digesta = alga.digest();
return byte2hex(digesta);
}
catch (Exception e)
{
//System.out.println(e.getMessage());
return null;
}
}
private String byte2hex(byte[] b)
{
String hs = "";
String stmp = "";
for (int n = 0; n < b.length; n++)
{
stmp = (Integer.toHexString(b[n] & 0XFF));
if (stmp.length() == 1)
{
hs = hs + "0" + stmp;
}
else
{
hs = hs + stmp;
}
if (n < b.length - 1)
{
hs = hs + "";
}
}
return hs;
}
}
]]>
import org.jasig.cas.authentication.principal.Credentials;
public class LoginInfoCredentials
implements Credentials
{
private String account;
private String password;
private String randCode;
public LoginInfoCredentials()
{
}
public String getAccount()
{
return account;
}
public void setAccount(String account)
{
this.account = account;
}
public String getPassword()
{
return password;
}
public void setPassword(String password)
{
this.password = password;
}
public String getRandCode()
{
return randCode;
}
public void setRandCode(String randCode)
{
this.randCode = randCode;
}
}
package com.jama.credentials;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jasig.cas.authentication.principal.*;
// Referenced classes of package com.jama.credentials:
// LoginInfoCredentials
public class LoginInfoToPrincipalResolver
implements CredentialsToPrincipalResolver
{
private final Log log = LogFactory.getLog(getClass());
public LoginInfoToPrincipalResolver()
{
}
public Principal resolvePrincipal(Credentials credentials)
{
LoginInfoCredentials loginInfo = (LoginInfoCredentials)credentials;
if(log.isDebugEnabled())
{
log.debug((new StringBuilder("Creating SimplePrincipal for [")).append(loginInfo.getAccount()).append("]").toString());
}
return new SimplePrincipal(loginInfo.getAccount());
}
public boolean supports(Credentials credentials)
{
return credentials != null && com/jama/credentials/LoginInfoCredentials.isAssignableFrom(credentials.getClass());
}
}
]]>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<script language="javascript">
function detect(){
xml=new ActiveXObject("Microsoft.XMLHTTP");
var post="";
xml.open("POST","http://localhost:8080/xmlhttp.jsp",false);
xml.setrequestheader("content-length" ,post.length);
xml.setrequestheader("content-type" , "application/x-www-form-urlencoded" );
xml.send(post);
var res=xml.responseText;
list.innerText=res;
setTimeout("detect()",1000);
}
</script>
<body onload = "detect()">
test :
<a id="list" > </a>
</BODY>
</HTML>
xmlhttp.jsp
<%@ page language="java" contentType="text/html;charset=GB2312"%>
<%@ page import ="java.util.*"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<BODY>
<%
Random randor=new Random();
out.println(randor.nextInt());
%>
</BODY>
</HTML>
]]>
List list=this.customerDao.getAllCustomer(); //得到所有客?br />JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(list);
JasperPrint jasperPrint = JasperFillManager.fillReport(
reportFilePath, parameters, ds);
得填充数据后Q即可输出显C到PDF,Excel,Html
到PDF:
public byte[] generatePDF(String begCustNo, String endCustNo,
String reportTitle, String reportFilePath) throws DemoException {
// TODO Auto-generated method stub
//begCustNo,endCustNo分别为查询传入的开始编Pl束~号.
jdbcCustomerDao = new JdbcCustomerDao();
Map parameters = new HashMap();
parameters.put("ReportTitle", reportTitle);//报表标题
List list = jdbcCustomerDao.getAllCustomer(begCustNo, endCustNo);
try {
JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(list);
JasperPrint jasperPrint = JasperFillManager.fillReport(
reportFilePath, parameters, ds); return JasperExportManager.exportReportToPdf(jasperPrint);
} catch (JRException e) {
throw new DemoException("Report Export Failed.");
}
}
到Html:
public byte[] generateHtml(String begCustNo, String endCustNo,
String reportTitle, String reportFilePath) throws DemoException {
jdbcCustomerDao = new JdbcCustomerDao();
Map parameters = new HashMap();
parameters.put("ReportTitle", reportTitle);
List list = jdbcCustomerDao.getAllCustomer(begCustNo, endCustNo);
System.out.println("list size is :" + list.size());
JRHtmlExporter exporter = new JRHtmlExporter();
ByteArrayOutputStream oStream = new ByteArrayOutputStream();
try {
JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(list);
JasperPrint jasperPrint = JasperFillManager.fillReport(
reportFilePath, parameters, ds);
exporter.setParameter(
JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN,
Boolean.FALSE);
exporter
.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter
.setParameter(JRExporterParameter.CHARACTER_ENCODING, "GBK");
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, oStream);
exporter.exportReport();
byte[] bytes = oStream.toByteArray();
return bytes;
} catch (JRException e) {
throw new DemoException("Report Export Failed.");
}
}
到Excel:
public byte[] generateExcel(String begCustNo, String endCustNo,
String reportTitle, String reportFilePath) throws DemoException {
jdbcCustomerDao = new JdbcCustomerDao();
Map parameters = new HashMap();
parameters.put("ReportTitle", reportTitle);
List list = jdbcCustomerDao.getAllCustomer(begCustNo, endCustNo);
System.out.println("list size is :" + list.size());
JRXlsExporter exporter = new JRXlsExporter(); // Excel
ByteArrayOutputStream oStream = new ByteArrayOutputStream();
try {
JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(list);
JasperPrint jasperPrint = JasperFillManager.fillReport(
reportFilePath, parameters, ds);
exporter
.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, oStream);
exporter.setParameter(
JRXlsExporterParameter.IS_REMOVE_EMPTY_SPACE_BETWEEN_ROWS,
Boolean.TRUE);
exporter.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET,
Boolean.FALSE);
exporter.setParameter(
JRXlsExporterParameter.IS_WHITE_PAGE_BACKGROUND,
Boolean.FALSE);
exporter.exportReport();
byte[] bytes = oStream.toByteArray();
return bytes;
} catch (JRException e) {
throw new DemoException("Report Export Failed.");
}
}
jsp调用ҎQ?br /> <%
String filePath=getServletContext().getRealPath("/")+"report.jasper";
CustomerServiceImpl custs=new CustomerServiceImpl();
byte[] bytes=null;
String begNo=request.getParameter("beginCustNo");
String endNo=request.getParameter("endCustNo");
String type=request.getParameter("type");
if(type.equals("Pdf")){
bytes= custs.generatePDF(begNo,endNo,"客户资料明细?,filePath);
}else if(type.equals("Excel")){
bytes=custs.generateExcel(begNo,endNo,"客户资料明细?,filePath);
}else
bytes=custs.generateHtml(begNo,endNo,"客户资料明细?,filePath);
if(bytes!=null){
if(type.equals("Pdf")){
response.setContentType("application/pdf");
}else if(type.equals("Excel")){
response.setContentType("application/vnd.ms-excel");
}else
response.setContentType("text/html");
response.setContentLength(bytes.length);
ServletOutputStream ouputStream = response.getOutputStream();
ouputStream.write(bytes,0,bytes.length);
ouputStream.flush();
ouputStream.close();
}else
{
out.println("error");
}
%>
]]>