From 7bfcf69c25668c4a7e54b32a4b953c8187104009 Mon Sep 17 00:00:00 2001
From: pght2c95q <2582048197@qq.com>
Date: Sun, 15 Dec 2024 14:37:37 +0800
Subject: [PATCH] Update ExportExcelServlet.java

---
 .../com/cn/servlet/ExportExcelServlet.java    | 117 +++++++++---------
 1 file changed, 56 insertions(+), 61 deletions(-)

diff --git a/ticketing-master/src/com/cn/servlet/ExportExcelServlet.java b/ticketing-master/src/com/cn/servlet/ExportExcelServlet.java
index f7ce1d2..113dedc 100644
--- a/ticketing-master/src/com/cn/servlet/ExportExcelServlet.java
+++ b/ticketing-master/src/com/cn/servlet/ExportExcelServlet.java
@@ -24,69 +24,64 @@ import cn.hutool.poi.excel.StyleSet;
 /**
  * 
  * @ClassName: ExportExcelServlet 
- * @Description: 管理员  将所有订单信息导出为excel
+ * @Description: 管理员将所有订单信息导出为excel
  * @author: ljy
  * @date: 2019年11月24日 上午2:04:49
  */
 public class ExportExcelServlet extends HttpServlet {
-	private static final long serialVersionUID = 1L;
+    private static final long serialVersionUID = 1L;
        
-
-	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-		// 从数据库中拉取数据
-		PrepService prepService = new PrepServiceImpl();
-		List<Prep> rows = prepService.getAll();
-
-		
-		
-		// 通过工具类创建writer
-		ExcelWriter writer = ExcelUtil.getWriter();
-		
-
-		// 设置单元格样式 (好像没用，待修复)
-		StyleSet style = writer.getStyleSet();
-		CellStyle cellStyle = style.getHeadCellStyle();
-		cellStyle.setAlignment(HorizontalAlignment.CENTER); // 水平居中  
-		cellStyle.setShrinkToFit(true); //设置单元格列宽自适应
-		cellStyle.setDataFormat((short) 2);
-		
-		
-
-		//自定义标题别名
-		writer.addHeaderAlias("prepId", "订单ID");
-		writer.addHeaderAlias("trainId", "车次ID");
-		writer.addHeaderAlias("pmemberId", "会员资料ID");
-		writer.addHeaderAlias("startStation", "起始站");
-		writer.addHeaderAlias("endStation", "终点站");
-		writer.addHeaderAlias("trainNumber", "火车车次");
-		writer.addHeaderAlias("startTime", "开车时间");
-		writer.addHeaderAlias("endTime", "到站时间");
-		writer.addHeaderAlias("price", "车票价格");
-		writer.addHeaderAlias("way", "付款情况");
-		writer.addHeaderAlias("booktime", "订票时间");
-		
-		// 合并单元格后的标题行，使用默认标题样式
-		writer.merge(10, "订单中心");
-		// 一次性写出内容，使用默认样式，强制输出标题
-		writer.write(rows, true);
-		
-		//out为OutputStream，需要写出到的目标流
-
-		//response为HttpServletResponse对象
-		response.setContentType("application/vnd.ms-excel;charset=utf-8"); 
-		//test.xls是弹出下载对话框的文件名，不能为中文，中文请自行编码
-		response.setHeader("Content-Disposition","attachment;filename=preps.xls"); 
-		ServletOutputStream out=response.getOutputStream(); 
-
-		writer.flush(out, true);
-		// 关闭writer，释放内存
-		writer.close();
-		//此处记得关闭输出Servlet流
-		IoUtil.close(out);
-
-		
-	}
-
-
-
-}
+    /**
+     * 处理GET请求，用于导出Excel文件。
+     * @param request HttpServletRequest对象，包含客户端请求信息。
+     * @param response HttpServletResponse对象，用于发送响应到客户端。
+     * @throws ServletException 可能抛出的Servlet异常。
+     * @throws IOException 可能抛出的IO异常。
+     */
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        // 从数据库中拉取数据
+        PrepService prepService = new PrepServiceImpl();
+        List<Prep> rows = prepService.getAll();
+
+        // 通过工具类创建writer
+        ExcelWriter writer = ExcelUtil.getWriter();
+
+        // 设置单元格样式 
+        StyleSet style = writer.getStyleSet();
+        CellStyle cellStyle = style.getHeadCellStyle();
+        cellStyle.setAlignment(HorizontalAlignment.CENTER); // 水平居中  
+        cellStyle.setShrinkToFit(true); //设置单元格列宽自适应
+        cellStyle.setDataFormat((short) 2);
+
+        //自定义标题别名
+        writer.addHeaderAlias("prepId", "订单ID");
+        writer.addHeaderAlias("trainId", "车次ID");
+        writer.addHeaderAlias("pmemberId", "会员资料ID");
+        writer.addHeaderAlias("startStation", "起始站");
+        writer.addHeaderAlias("endStation", "终点站");
+        writer.addHeaderAlias("trainNumber", "火车车次");
+        writer.addHeaderAlias("startTime", "开车时间");
+        writer.addHeaderAlias("endTime", "到站时间");
+        writer.addHeaderAlias("price", "车票价格");
+        writer.addHeaderAlias("way", "付款情况");
+        writer.addHeaderAlias("booktime", "订票时间");
+
+        // 合并单元格后的标题行，使用默认标题样式
+        writer.merge(10, "订单中心");
+        // 一次性写出内容，使用默认样式，强制输出标题
+        writer.write(rows, true);
+
+        // 设置响应的内容类型为Excel文件
+        response.setContentType("application/vnd.ms-excel;charset=utf-8"); 
+        // 设置响应头，提示浏览器这是一个附件，需要下载
+        response.setHeader("Content-Disposition","attachment;filename=preps.xls"); 
+        ServletOutputStream out = response.getOutputStream(); 
+
+        // 将Excel写入到输出流
+        writer.flush(out, true);
+        // 关闭writer，释放内存
+        writer.close();
+        // 关闭输出流
+        IoUtil.close(out);
+    }
+}
\ No newline at end of file