Java实现中文算数验证码的实现示例(算数运算+-*/)

为了防止，页面向数据库暴力注册入力，用户登录暴力破解，所以加入验证码，验证码无法被软件获取上边的内容(加入算数计算，更加安全)，所以在现在技术，暂时安全。

先看效果图：

第一次加载比较慢，防止无法加载验证码显示，后台获取准备好的默认正在加载图片(静态图片)，后台图片获取好后，替代。

验证码效果图：

后台Java图片实现类VerificationCodeTool：

package com.tsXs.fileshare.tools;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import org.apache.log4j.Logger;

/**
*
* ClassName: VerificationCodeTool <br/>
* Description: creat verification code <br/>
* Date: 2015-3-3 下午08:37:55 <br/>
* <br/>
*
* @author yptian@aliyun.com
*
* first made
* @version 1.0.0<br/>
*
*/
public class VerificationCodeTool {
//LOG
private static final Logger LOG =Logger.getLogger(VerificationCodeTool.class);
//verification code image width
private static final int IMG_WIDTH=146;
//verification code image height
private static final int IMG_HEIGHT=30;
//The number of interference lines
private static final int DISTURB_LINE_SIZE = 15;
//generate a random number
private Random random = new Random();
//result
private int xyresult;
//result random string
private String randomString;
//Chinese Numbers
//private static final String [] CNUMBERS = "零,一,二,三,四,五,六,七,八,九,十".split(",");
//零一二三四五六七八九十乘除加减
//Here, must be java Unicode code
private static final String CVCNUMBERS = "\u96F6\u4E00\u4E8C\u4E09\u56DB\u4E94\u516D\u4E03\u516B\u4E5D\u5341\u4E58\u9664\u52A0\u51CF";
//Definition of drawings in the captcha characters font, font name, font style, font size
//static final font : In Chinese characters garbled
private final Font font = new Font("黑体", Font.BOLD, 18);
//data operator
private static final Map<String, Integer> OPMap = new HashMap<String, Integer>();

static{
OPMap.put("*", 11);
OPMap.put("/", 12);
OPMap.put("+", 13);
OPMap.put("-", 14);
}
/**
* The generation of image verification code
* */
public BufferedImage drawVerificationCodeImage(){
//image
BufferedImage image = new BufferedImage(IMG_WIDTH, IMG_HEIGHT, BufferedImage.TYPE_INT_RGB);
//In memory to create a brush
Graphics g = image.getGraphics();
//Set the brush color
//g.setColor(getRandomColor(200,250));
g.setColor(Color.WHITE);
//Fill the background color, using the current brush colour changing background color images
//The meaning of the four parameters respectively, starting x coordinates, starting y, width, height.
//image background
g.fillRect(0, 0, IMG_WIDTH, IMG_HEIGHT);
//Set the brush color
g.setColor(getRandomColor(200,250));
//image border
g.drawRect(0, 0, IMG_WIDTH-2, IMG_HEIGHT-2);

//Set disturb line color
g.setColor(getRandomColor(110, 133));
//Generate random interference lines
for(int i =0;i < DISTURB_LINE_SIZE; i++){
drawDisturbLine1(g);
drawDisturbLine2(g);
}
//Generate a random number, set return data
getRandomMathString();
LOG.info("验证码 : "+randomString);
LOG.info("验证码结果 : "+xyresult);
//The generated random string used to save the system
StringBuffer logsu = new StringBuffer();
for(int j=0,k = randomString.length(); j < k; j++){
    int chid = 0;
    if(j==1){
      chid = OPMap.get(String.valueOf(randomString.charAt(j)));
    }else{
      chid = Integer.parseInt(String.valueOf(randomString.charAt(j)));
    }
    String ch = String.valueOf(CVCNUMBERS.charAt(chid));
    logsu.append(ch);
    drawRandomString((Graphics2D)g,ch, j);
}
//= ?
drawRandomString((Graphics2D)g,"\u7B49\u4E8E\uFF1F", 3);
logsu.append("\u7B49\u4E8E \uFF1F");
LOG.info("汉字验证码 : "+logsu);
randomString = logsu.toString();
//Release the brush object
g.dispose();
return image;
}
/**
* Get a random string
* */
private void getRandomMathString(){
//Randomly generated number 0 to 10
int xx = random.nextInt(10);
int yy = random.nextInt(10);
//save getRandomString
StringBuilder suChinese = new StringBuilder();
//random 0,1,2
int Randomoperands = (int) Math.round(Math.random()*2);
//multiplication
if(Randomoperands ==0){
this.xyresult = yy * xx;
//suChinese.append(CNUMBERS[yy]);
suChinese.append(yy);
suChinese.append("*");
suChinese.append(xx);
//division, divisor cannot be zero, Be divisible
}else if(Randomoperands ==1){
if(!(xx==0) && yy％xx ==0){
this.xyresult = yy/xx;
       suChinese.append(yy);
       suChinese.append("/");
       suChinese.append(xx);
}else{
this.xyresult = yy + xx;
       suChinese.append(yy);
       suChinese.append("+");
       suChinese.append(xx);
}
//subtraction
}else if(Randomoperands ==2){
this.xyresult = yy - xx;
       suChinese.append(yy);
       suChinese.append("-");
       suChinese.append(xx);
//add
}else{
this.xyresult = yy + xx;
       suChinese.append(yy);
       suChinese.append("+");
       suChinese.append(xx);
}
this.randomString = suChinese.toString();
}
/**
* Draw a random string
* @param g Graphics
* @param randomString random string
* @param i the random number of characters
* */
public void drawRandomString(Graphics2D g,String randomvcch,int i){
//Set the string font style
g.setFont(font);
//Set the color string
int rc = random.nextInt(255);
int gc = random.nextInt(255);
int bc = random.nextInt(255);
g.setColor(new Color(rc, gc, bc));
//random string
//Set picture in the picture of the text on the x, y coordinates, random offset value
int x = random.nextInt(3);
int y = random.nextInt(2);
g.translate(x, y);
//Set the font rotation angle
int degree = new Random().nextInt() ％ 15;
//Positive point of view
g.rotate(degree * Math.PI / 180, 5+i*25, 20);
//Character spacing is set to 15 px
//Using the graphics context of the current font and color rendering by the specified string for a given text.
//The most on the left side of the baseline of the characters in the coordinate system of the graphics context (x, y) location
//str- to draw string.x - x coordinate.y - y coordinate.
g.drawString(randomvcch, 5+i*25, 20);
//Reverse Angle
g.rotate(-degree * Math.PI / 180, 5+i*25, 20);
}
/**
*Draw line interference
*@param g Graphics
* */
public void drawDisturbLine1(Graphics g){
int x1 = random.nextInt(IMG_WIDTH);
int y1 = random.nextInt(IMG_HEIGHT);
int x2 = random.nextInt(13);
int y2 = random.nextInt(15);
//x1 - The first point of the x coordinate.
//y1 - The first point of the y coordinate
//x2 - The second point of the x coordinate.
//y2 - The second point of the y coordinate.
//X1 and x2 is the starting point coordinates, x2 and y2 is end coordinates.
g.drawLine(x1, y1, x1 + x2, y1 + y2);
}

/**
*Draw line interference
*@param g Graphics
* */
public void drawDisturbLine2(Graphics g){
int x1 = random.nextInt(IMG_WIDTH);
int y1 = random.nextInt(IMG_HEIGHT);
int x2 = random.nextInt(13);
int y2 = random.nextInt(15);
//x1 - The first point of the x coordinate.
//y1 - The first point of the y coordinate
//x2 - The second point of the x coordinate.
//y2 - The second point of the y coordinate.
//X1 and x2 is the starting point coordinates, x2 and y2 is end coordinates.
g.drawLine(x1, y1, x1 - x2, y1 - y2);
}
/**
* For random color
* @param fc fc
* @param bc bc
* @return color random color
* */
public Color getRandomColor(int fc,int bc){
if(fc > 255){
fc = 255;
}
if(bc > 255){
bc = 255;
}
//Generate random RGB trichromatic
int r = fc+random.nextInt(bc -fc - 16);
int g = fc+random.nextInt(bc - fc - 14);
int b = fc+random.nextInt(bc - fc - 18);
return new Color(r, g, b);
}

/**
  * xyresult.<br/>
  *
  * @return the xyresult <br/>
  *
  */
public int getXyresult() {
return xyresult;
}

/**
  * randomString.<br/>
  *
  * @return the randomString <br/>
  *
  */
 public String getRandomString() {
   return randomString;
 }
}

生产静态验证码(为了防止，加载慢，空白显示)：

package com.tsXs.fileshare.tools;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.filechooser.FileSystemView;

import org.apache.log4j.Logger;

import com.tsXs.fileshare.configuration.properties.StaticConstants;
/**
* ClassName: ImageTool <br/>
* Description: get BufferedImage creat image<br/>
* Date: 2015-3-10 下午05:05:38 <br/>
* <br/>
*
* @author yptian@aliyun.com
*
* first made
* @version 1.0.0<br/>
*
*/
public class ImageTool {
//LOG
private static final Logger LOG = Logger.getLogger(ImageTool.class);
//image
 private BufferedImage image;  

/**
  * createImage : out dest path for image
  * @param fileLocation dest path
  */
 private void createImage(String fileLocation) {    
   try {      
     FileOutputStream fos = new FileOutputStream(fileLocation);      
     BufferedOutputStream bos = new BufferedOutputStream(fos);
     ImageIO.write(image, "png", bos);
//      com.sun.image.codec.jpeg.JPEGImageEncoder encoder = com.sun.image.codec.jpeg.JPEGCodec.createJPEGEncoder(bos);      
//      encoder.encode(image);      
     bos.flush();
     bos.close();
     LOG.info("@2"+fileLocation+"图片生成输出成功");  
   } catch (Exception e) {      
     LOG.info("@2"+fileLocation+"图片生成输出失败",e);  
   }
 }
 /**
  * createFileIconImage ：create share file list icon
  * @param destOutPath create file icon save dictory
  */
 public void createFileIconImage(String destOutPath){
  //get properties operate tool
  PropertiesTool propertiesTool = PropertiesTool.getInstance(StaticConstants.SHARE_FILE_CONFGURATION_PROPERTIES_PATH);
  //get share file root path
  String shareFileRootPath = propertiesTool.getPropertiesValue("FileShareRootPath");
  //root dictory
  File rootDictory = new File(shareFileRootPath);
  //child file list
  File [] fileList = rootDictory.listFiles();
  //child list files
  File file = null;
  if(fileList != null && fileList.length>0){
  LOG.info("分享文件根目录下文件数:"+fileList.length);
  for(int i = 0,j = fileList.length;i < j;i++){
  String fileName = fileList[i].getName();
  String fileAllName = shareFileRootPath +fileName;
  file = new File(fileAllName);
  //get file system icon
  ImageIcon fileIcon = (ImageIcon) FileSystemView.getFileSystemView().getSystemIcon(file);
  image = (BufferedImage) fileIcon.getImage();
  if(image != null){
  LOG.info("@1"+fileName+"文件的图标获取成功");
  }
  Graphics g = image.getGraphics();
  g.drawImage(image, 0, 0, null);
  String fileNameX = fileName.substring(0,fileName.lastIndexOf("."));
  //out image to dest
  createImage(destOutPath+"\\"+fileNameX+".png");
  LOG.info("@3"+fileName+"文件的图标生成成功");
  }
  }
 }

/**
  * creatDefaultVerificationCode ：create default verification code
  * @param destOutPath create creatDefaultVerificationCode save dictory
  */
 public void creatDefaultVerificationCode(String destOutPath){
 //verification code image height
 //comment to com.tss.fileshare.tools.VerificationCodeTool 65 row,please
 int imgwidth=146;
 int imgheight=30;
 int disturblinesize = 15;
 VerificationCodeTool vcTool = new VerificationCodeTool();
 //default verification code
image = new BufferedImage(imgwidth, imgheight, BufferedImage.TYPE_INT_RGB);
Graphics g = image.getGraphics();
g.setColor(Color.WHITE);
g.fillRect(0, 0, 146, 30);
g.setColor(vcTool.getRandomColor(200,250));
g.drawRect(0, 0, imgwidth-2, imgheight-2);
for(int i =0;i < disturblinesize; i++){
vcTool.drawDisturbLine1(g);
vcTool.drawDisturbLine2(g);
}
//玩命加载中…
String defaultVCString = "\u73A9\u547D\u52A0\u8F7D\u4E2D\u2026";
String dfch = null;
for(int i = 0;i < 6;i++){
dfch = String.valueOf(defaultVCString.charAt(i));
vcTool.drawRandomString((Graphics2D)g, dfch, i);
}
LOG.info("默然验证码生成成功");
//Graphics gvc = imagevc.getGraphics();
createImage(destOutPath+"\\defaultverificationcode.jpeg");
 }
 /**
 * graphicsGeneration : create image
 * @param imgurl display picture url . eg:F:/imagetool/7.jpg<br/>
 * @param imageOutPathName image out path+naem .eg:F:\\imagetool\\drawimage.jpg<br/>
 * @param variableParmeterLength ; int, third parameter length.<br/>
 * @param drawString variableParmeterLength ;String [] .<br/>
 */
 public void graphicsGeneration(String imgurl,String imageOutPathName,int variableParmeterLength,String...drawString) {
   //The width of the picture
   int imageWidth = 500;  
   //The height of the picture
   int imageHeight = 400;  
   image = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);    
   Graphics graphics = image.getGraphics();    
   graphics.setColor(Color.WHITE);  
   //drawing image
   graphics.fillRect(0, 0, imageWidth, imageHeight);    
   graphics.setColor(Color.BLACK);    
   //draw string string , left margin,top margin
   for(int i = 0,j = variableParmeterLength;i < j;i++){
   graphics.drawString(drawString[i], 50, 10+15*i);
   }
   //draw image url
   ImageIcon imageIcon = new ImageIcon(imgurl);
   //draw image , left margin,top margin
   //The coordinates of the top left corner as the center(x,y)[left top angle]
   //Image observer :If img is null, this method does not perform any action
   graphics.drawImage(imageIcon.getImage(), 200, 0, null);
   createImage(imageOutPathName);  
 }

public BufferedImage getImage() {
return image;
}
public void setImage(BufferedImage image) {
this.image = image;
}
}

服务器，启动的时候，调用一次，生成默认图片到服务器“/servertempdictory/fileicon/”目录下：

      //create default verification code
      String fileIconDictory = serverPath+"\\servertempdictory\\fileicon";
       imageTool.creatDefaultVerificationCode(fileIconDictory);

生成动态验证码，并保存值到session中(此处有登录和注册的分路，这个读者可忽略，走一条既可)：

/**
  * creat verification code
  * */
 public void verificationcode(){
  //response
  HttpServletResponse response = ServletActionContext.getResponse();
  //request
  HttpServletRequest request = ServletActionContext.getRequest();
  //verification code demander
  String vCdemander = request.getParameter("vcdemander");
  try{
   //set encoding
   request.setCharacterEncoding("utf-8");
   response.setContentType("text/html;charset=utf-8");
   //Verification code tool
   VerificationCodeTool vcTool = new VerificationCodeTool();
   BufferedImage image = vcTool.drawVerificationCodeImage();
   //Verification code result
   int vcResult = vcTool.getXyresult();
   String vcValue = vcTool.getRandomString();
//Set ban cache
 //Cache-control : Specify the request and response following caching mechanism
 //no-cache: Indicates a request or response message cannot cache
 response.setHeader("Cache-Control", "no-cache");
 //Entity header field response expiration date and time are given
 response.setHeader("Pragma", "No-cache");
 response.setDateHeader("Expires", 0);
 // Set the output stream content format as image format
 response.setContentType("image/jpeg");
 //session
 //true: if the session exists, it returns the session, or create a new session.
 //false: if the session exists, it returns the session, otherwise it returns null.
 HttpSession session=request.getSession(true);
 //set verificationcode to session
 //login
 if("userlogin".equals(vCdemander)){
 session.setAttribute("verificationcodeuserlogin",vcResult);
 }
 //regiser
 if("userregister".equals(vCdemander)){
 session.setAttribute("verificationcodeuserregister",vcResult);
 }
 //To the output stream output image
ImageIO.write(image, "JPEG", response.getOutputStream());
LOG.info("获取验证码成功 :\n验证码:"+vcValue+"\n验证码结果:"+vcResult);
} catch (Exception e) {
LOG.error("获取验证码失败",e);
}
}

用struts2实现，所以配置文件struts.xml：

<!-- Set whether to support dynamic method calls, true to support, false does not support. -->
<constant name="struts.enable.DynamicMethodInvocation" value="true" />
<!-- The suffix specified request -->
<constant name="struts.action.extension" value="do,go,tsXs,action"></constant>
<!-- user operation [first login server,server initialize]-->
<package name="user" namespace="/fileshare" extends="struts-default">
<!-- user operate ; The wildcard method call-->
<action name="user*" class="com.tsXs.fileshare.controller.UserController" method="{1}">
<result name="success">/view/common/message.jsp</result>
<result name="error">/view/userLogin.jsp</result>
</action>
</package>

页面jsp显示代码：

<tr>
<td width="100">
 <span class="hint">*[验证码]:只能输入数字和负号"-"</span>
</td>
</tr>
<tr>
<td width="100">
 <label for="userRegPassWord">验证码</label>
  <input type="text" id="verificationcodereg" name="verificationcodereg" tabindex="3" maxlength="3" class="t_input" value="" style="ime-mode:disabled;" οnblur="checkuserverificationcode(this);" οnkeypress="return (/[\d-]/.test(String.fromCharCode(event.keyCode)));" />
  <span id="usvcmsg"></span>
 <input type="hidden" id="verificationcoderegflag" value="" />
</td>
</tr>
<tr>
<td width="140">
 <div id="refreshvc">
 <span οnclick="refreshvc();" style="padding-left: 49px;cursor: pointer;"><img id="verificationcodeimg" src="${pageContext.request.contextPath}/servertempdictory/fileicon/defaultverificationcode.jpeg" />
 <span style="height: 30px;width: 16px;padding-left: 4px;"><img src="image/refreshvc.png" /></span>
 <span style="font-size: 12px;color:#2c629e; width: 20px;">换一张</span>
 </span>
 </div>
</td>
</tr>

在js中用正则，保证只能输入，最多3位，可以在数字前输入一个"-",即onkeypress保证只能输入数字和"-":

var userverificationcoderegex = /^(-{0,1}\d+){1,3}$/;
if(userverificationcoderegex.test(userverificationcode)){.....

jsp图片效果：

js动态刷新验证码：

$(document).ready(function(){
//load verificatino code
refreshvc();
});
//refresh verification code
function refreshvc(){
var path = $("#contextPath").val();
var refreshvcurl =path+"/fileshare/userverificationcode.tsXs?vcdemander=userregister&time="+new Date();
$("#verificationcodeimg").attr("src",refreshvcurl);
}

验证码验证：

/**
  * checkverificationcode : check verification code equals
  */
 public void checkverificationcode(){
   //request
   HttpServletRequest request = ServletActionContext.getRequest();
   //response
   HttpServletResponse response = ServletActionContext.getResponse();
   //output stream
   PrintWriter out = null;
   //session
   HttpSession session = request.getSession();
   //verification code from client
   String vcclient = null;
   //verification code from server
   String vcserver = null;
   //verification code demander
   String vCdemander = request.getParameter("vcdemander");
   //check verification code to clien flag
   String checktoclienflag = null;
   try{
   //get verificationcode to session
 //login
   if("userlogin".equals(vCdemander)){
   vcclient = request.getParameter("vclogincode");
   vcserver = String.valueOf(session.getAttribute("verificationcodeuserlogin"));
   }
   //regiser
   if("userregister".equals(vCdemander)){
     vcclient = request.getParameter("vcregcode");
     vcserver = String.valueOf(session.getAttribute("verificationcodeuserregister"));
   }
   vcclient = UserController.encodingconvert(vcclient);
   vcclient = vcclient == null ? "" : vcclient;
   if(vcclient.equals(vcserver)){
     checktoclienflag = "vcok";
   }else{
     checktoclienflag = "vcwrong";
   }
     //set no cache,content type ,encoding
     response.setHeader("Cache-Control", "no-cache");
     response.setContentType("text/html");
     response.setCharacterEncoding("GBK");
     //output stream
     out = response.getWriter();
     out.print(checktoclienflag);
     LOG.info("验证码：vcclient: "+vcclient+"vcserver: "+vcserver+"验证顺利");
   }catch (Exception e) {
     LOG.error("vcclient: "+vcclient+"vcserver: "+vcserver+"验证失败",e);
   }finally{
     out.flush();
     out.close();
   }
 }

properties辅助类：

/**
* Copyright (c) 2015,TravelSky.
* All Rights Reserved.
* TravelSky CONFIDENTIAL
*
* Project Name:filesharetss
* Package Name:com.tss.fileshare.controller.tools
* File Name:PropertiesFileOperation.java
* Date:2015-2-27 下午05:30:05
*
*/
package com.tsXs.fileshare.tools;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.Properties;

import org.apache.log4j.Logger;

/**
*
* ClassName: PropertiesFileOperationTool <br/>
* Description: inner class Properties file operation <br/>
* Date: 2015-2-27 下午05:10:52 <br/>
* <br/>
*
* @author yptian@aliyun.com
*
*     first made
* @version 1.0.0<br/>
*
*/

public class PropertiesTool {
 // LOG
 private static final Logger LOG = Logger.getLogger(PropertiesTool.class);
 // Singleton instance
 private static PropertiesTool instance = new PropertiesTool();

private static Properties properties;
 /**
  *
  * Creates a new Singleton instance of PropertiesFileOperation.<br/>
  */
 private PropertiesTool() {

}
 /**
  * getInstance :get properties object
  * @param propertiesFilePathName properties file path and name
  * @return
  */
 public static PropertiesTool getInstance(String propertiesFilePathName){
   properties = loadPropertiesFile(propertiesFilePathName);
   return instance;
 }
 /**
  *
  * loadPropertiesFile:Load properties file by path and name<br/>
  * @param propertiesFilePathName path and name of properties file <br/>
  * @return properties properties
  */
 private static Properties loadPropertiesFile(String propertiesFilePathName) {
   Properties properties = new Properties();
   InputStream isLoad = PropertiesTool.class.getClassLoader().getResourceAsStream(propertiesFilePathName);
   try {
     // loader properties
     properties.load(isLoad);
   } catch (IOException e) {
     LOG.error(propertiesFilePathName + " properties file read failure", e);
   } finally {
try {
isLoad.close();
} catch (IOException e) {
LOG.error("properties file stream close error",e);
}
   }
   return properties;
 }
 /**
  * *
  * getPropertiesValue:Get properties value by key <br/>
  * @param key properties key <br/>
  * @return value properties value
  */
 public String getPropertiesValue(String key) {
   return properties.getProperty(key);
 }

public static String getInstanceByServerRealPathOfValue(String propertiesFileServerRealPathName,String key){
 String pValue = null;
 try {
InputStream isrLoad = new FileInputStream(propertiesFileServerRealPathName);
properties.load(isrLoad);
isrLoad.close();
pValue = properties.getProperty(key);
} catch (IOException e) {
LOG.error("Failed to get the value under the server of the properties file",e);
}
 return pValue;
 }
 /**
  *
  * getProperties:Get properties by key and value <br/>
  * @param key properties key <br/>
  * @param value properties value
  */
 public void setProperties(String filePath,String key,String value){
 try {
   InputStream is = new FileInputStream(filePath);
   OutputStream os = new FileOutputStream(filePath);
properties.load(is);
properties.setProperty(key, value);
properties.store(os, null);
os.flush();
is.close();
os.close();
} catch (IOException e) {
LOG.error("properties file stream close error",e);
}
 }

/**
  *
  * alterProperties:alter properties by key and value <br/>
  * @param key properties key <br/>
  * @param value properties value
  */
 public void alterProperties(String filePath,String key,String value){
   try{
     InputStream is = new FileInputStream(filePath);
     OutputStream os = new FileOutputStream(filePath);
     properties.load(is);
     properties.remove(key);
     properties.setProperty(key, value);
     properties.store(os, null);
os.flush();
is.close();
os.close();
   } catch (IOException e) {
     LOG.error("properties file stream close error",e);
   }
 }
 /**
  *
  * getAllProperties:Read the properties of all the information <br/>
  * @return properties information
  */
 @SuppressWarnings("rawtypes")
public String getAllProperties(){
Enumeration en = properties.propertyNames();
   StringBuffer sf = new StringBuffer();
   while (en.hasMoreElements()) {
     String key = (String) en.nextElement();
     String value = properties.getProperty (key);
     sf.append("\n"+key);
     sf.append("=");
     value = value.replace(":", "\\:");
     sf.append(value);
   }
   return sf.toString();
 }

}

来源：https://blog.csdn.net/weixin_34355881/article/details/90616273