给商品导出初步增加带模板导出的逻辑

jshERP-boot/src/main/java/com/jsh/erp/utils/ExcelUtils.java

@@ -1,10 +1,14 @@
 package com.jsh.erp.utils;
 
 import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.InputStream;
 import java.text.SimpleDateFormat;
 import java.util.*;
 
 import jxl.*;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.util.StringUtils;
 import jxl.format.*;
 import jxl.write.Label;
@@ -13,10 +17,25 @@ import jxl.write.WritableFont;
 import jxl.write.WritableSheet;
 import jxl.write.WritableWorkbook;
 
+@Slf4j
 public class ExcelUtils {
 
 	public static WritableFont arial14font = null;
 
+	public static InputStream getPathByFileName(String template, String tmpFileName) {
+		File tmpFile = new File(template, tmpFileName);
+		InputStream path = null;
+		//判断文件或文件夹是否存在
+		if (tmpFile.exists()) {
+			try {
+				path = new FileInputStream(tmpFile);
+			} catch (FileNotFoundException e) {
+				log.error("", e);
+			}
+		}
+		return path;
+	}
+
 	public static File exportObjects(String fileName, String[] names,
 			String title, List<String[]> objects) throws Exception {
 		File excelFile = new File("fileName.xls");

jshERP-boot/src/main/java/com/jsh/erp/utils/ExportExecUtil.java

@@ -1,10 +1,13 @@
 package com.jsh.erp.utils;
 
-import javax.servlet.http.HttpServletResponse;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.OutputStream;
+import lombok.extern.slf4j.Slf4j;
 
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServletResponse;
+import java.io.*;
+import java.net.URLEncoder;
+
+@Slf4j
 public class ExportExecUtil {
 
 	public static void showExec(File excelFile,String fileName,HttpServletResponse response) throws Exception{
@@ -25,4 +28,31 @@ public class ExportExecUtil {
 		   fis.close();
 	}
 
+	public static void downloadFile(InputStream inputStream, String fileName , HttpServletResponse response) {
+		try {
+			response.setContentType("multipart/form-data");
+			response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
+			ServletOutputStream outputStream = response.getOutputStream();
+			byte[] buff = new byte[1024];
+			int length = 0;
+			while ((length = inputStream.read(buff)) != -1) {
+				outputStream.write(buff, 0, length);
+			}
+			if (outputStream != null) {
+				outputStream.flush();
+				outputStream.close();
+			}
+		} catch (Exception e) {
+			e.printStackTrace();
+		} finally {
+			if (inputStream != null) {
+				try {
+					inputStream.close();
+				} catch (IOException e) {
+					log.error("关闭资源出错" + e.getMessage());
+					e.printStackTrace();
+				}
+			}
+		}
+	}
 }