首先實現前臺界面,上傳圖片並保存到指定路徑,而後java製做dll,利用jni調用C++代碼,將保存的圖片路徑傳給dll處理,並返回一個處理結果。css
整個環境以下:
window10 x64
jdk1.7 x86,tomcat7.0 x86
myeclipse 2014 32位
struts-2.3.16.3html
第一步:利用struts2實現多圖片上傳,界面以下:java
項目的目錄結構以下:web
首先下載struts2,並在struts-2.3.16.3apps找到struts2-blank.war,將其解壓,而後把WEB-INF目錄下的全部jar包複製到這,以下圖:spring
在src文件夾右鍵,新創建一個struts.xml(這裏用直接複製struts目錄下的struts.xml到項目下,編譯器會報錯,具體緣由我也沒弄清楚),具體步驟如圖:apache
struts.xml內容:segmentfault
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <!-- 該屬性指定須要Struts2處理的請求後綴,該屬性的默認值是action,即全部匹配*.action的請求都由Struts2處理。 若是用戶須要指定多個請求後綴,則多個後綴之間以英文逗號(,)隔開。 --> <constant name="struts.action.extension" value="do" /> <!-- 設置瀏覽器是否緩存靜態內容,默認值爲true(生產環境下使用),開發階段最好關閉 --> <constant name="struts.serve.static.browserCache" value="false" /> <!-- 當struts的配置文件修改後,系統是否自動從新加載該文件,默認值爲false(生產環境下使用),開發階段最好打開 --> <constant name="struts.configuration.xml.reload" value="true" /> <!-- 開發模式下使用,這樣能夠打印出更詳細的錯誤信息 --> <constant name="struts.devMode" value="true" /> <!-- 默認的視圖主題 --> <constant name="struts.ui.theme" value="simple" /> <!--<constant name="struts.objectFactory" value="spring" />--> <!--解決亂碼 --> <constant name="struts.i18n.encoding" value="UTF-8" /> <constant name="struts.multipart.maxSize" value="10701096"/> <package name="struts2" extends="struts-default"> <action name="upLoad" class="com.action.upLoadAction" method="execute"> <!-- 要建立/image文件夾,不然會報找不到文件 --> <param name="savePath">/image</param> <result name="success">index.jsp</result> </action> </package> </struts>
在WEB-INF目錄下新建web.xml以下圖:數組
web.xml內容:瀏覽器
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>Test</display-name> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app>
而後在WebRoot目錄下新建一個image(文件夾的名稱不一樣的話,須要在struts.xml進行同步修改)文件夾備用:緩存
接下來新建com.action包,在此包下新建upLoadAction.java,(如何要修更名稱的話,也須要在struts.xml中修改一下配置信息),代碼:
package com.action; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; /** * 使用數組上傳多個文件 * * @author ljq * */ @SuppressWarnings("serial") public class upLoadAction extends ActionSupport{ public native int Contrast(String path1,String path2); private File[] image; //上傳的文件 private String[] imageFileName; //文件名稱 private String[] imageContentType; //文件類型 private String savePath; @Override public String execute() throws Exception { ServletActionContext.getRequest().setCharacterEncoding("UTF-8"); //取得須要上傳的文件數組 File[] files = getImage(); String []str=new String[2]; if (files !=null && files.length > 0) { for (int i = 0; i < files.length; i++) { //創建上傳文件的輸出流, getImageFileName()[i] str[i]=getSavePath() + "\\" + getImageFileName()[i]; System.out.println(getSavePath() + "\\" + getImageFileName()[i]); FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + getImageFileName()[i]); //創建上傳文件的輸入流 FileInputStream fis = new FileInputStream(files[i]); byte[] buffer = new byte[1024]; int len = 0; while ((len=fis.read(buffer))>0) { fos.write(buffer, 0, len); } fos.close(); fis.close(); } } //這一段代碼是用來調用dll,進行圖片對比的 try{ upLoadAction t=new upLoadAction(); System.loadLibrary("Test4"); int a=3; a=t.Contrast(str[0],str[1]); System.out.println("**************"+a); }catch(Exception exp){ System.out.println("處理圖片出錯!"); } return SUCCESS; } public File[] getImage() { return image; } public void setImage(File[] image) { this.image = image; } public String[] getImageFileName() { return imageFileName; } public void setImageFileName(String[] imageFileName) { this.imageFileName = imageFileName; } public String[] getImageContentType() { return imageContentType; } public void setImageContentType(String[] imageContentType) { this.imageContentType = imageContentType; } /** * 返回上傳文件保存的位置 * * @return * @throws Exception */ public String getSavePath() throws Exception { return ServletActionContext.getServletContext().getRealPath(savePath); } public void setSavePath(String savePath) { this.savePath = savePath; } }
在WebRoot下新建upload.jsp,代碼以下:
<%@ page language="java" import="java.util.*" contentType="text/html; charset=UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'upLoad.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <!-- ${pageContext.request.contextPath}/upload/execute_upload.do --> <!-- ${pageContext.request.contextPath}/upload1/upload1.do --> <!-- ${pageContext.request.contextPath}/upload2/upload2.do --> <!-- --> <form action="${pageContext.request.contextPath}/upLoad.do" enctype="multipart/form-data" method="post"> 文件1:<input type="file" name="image"><br/> 文件2:<input type="file" name="image"><br/> <input type="submit" value="上傳" /> </form> </body> </html>
index.jsp代碼以下:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib uri="/struts-tags" prefix="s"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'message.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> </head> <body> 上傳成功 <br/> <s:debug></s:debug> </body> </html>
到此爲止,圖片就可上傳成功了
其中還有就是要注意tomcat,jdk版本要一致,我都是用的1.7對應7.0,而後myeclipse2014 32位,並且要在myeclipse中將本身的jdk1.7和tomcat配置進去,而不能用myeclipse自帶的
具體配置能夠參考個人另外一篇文章:
https://segmentfault.com/a/11...
第二步,製做dll,並調用,製做dll的過程在個人另外一篇文章裏面有:
https://segmentfault.com/a/11...
我這裏只貼出程序入口處的代碼:
#include "Test.h" #include "main.h" JNIEXPORT jint JNICALL Java_com_action_upLoadAction_Contrast (JNIEnv *env, jobject obj, jstring path1, jstring path2){ //將java字符串類型轉化爲char* 型 const char* str1 = env->GetStringUTFChars(path1, 0); const char* str2 = env->GetStringUTFChars(path2, 0); //不能直接把const char*型做爲imread()的實參,所以將char *str1複製到cap1中 char cap1[128]; char cap2[128]; strcpy(cap1, str1); strcpy(cap2, str2); //printf(cap1); //printf(cap2); cv::Mat im1 = cv::imread(cap1); cv::Mat im2 = cv::imread(cap2); int predictout = image(im1, im2); return predictout; }
頭文件的代碼:
/* DO NOT EDIT THIS FILE - it is machine generated */ #include <jni.h> /* Header for class com_action_upLoadAction */ #ifndef _Included_com_action_upLoadAction #define _Included_com_action_upLoadAction #ifdef __cplusplus extern "C" { #endif /* * Class: com_action_upLoadAction * Method: Contrast * Signature: (Ljava/lang/String;Ljava/lang/String;)I */ JNIEXPORT jint JNICALL Java_com_action_upLoadAction_Contrast (JNIEnv *env, jobject obj, jstring path1, jstring path2); #ifdef __cplusplus } #endif #endif
製做好的dll要放在tomcat的E:\tom1\apache-tomcat-7.0.78_x86\bin
目錄下還有這幾個數據文本也是