com.beginner.core.utils.ObjectExcelView.java Source code

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Here is the source code for com.beginner.core.utils.ObjectExcelView.java

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/*
 * Copyright 2015-9999 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.beginner.core.utils;

import java.util.Date;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.springframework.web.servlet.view.document.AbstractExcelView;

import com.beginner.core.plugin.PageData;

/**
 * EXCEL
 * ??ObjectExcelView.java
 */
@SuppressWarnings("deprecation")
public class ObjectExcelView extends AbstractExcelView {

    @SuppressWarnings("unchecked")
    @Override
    protected void buildExcelDocument(Map<String, Object> model, HSSFWorkbook workbook, HttpServletRequest request,
            HttpServletResponse response) throws Exception {
        Date date = new Date();
        String filename = DateUtil.date2Str(date, "yyyyMMddHHmmss");
        HSSFSheet sheet;
        HSSFCell cell;
        response.setContentType("application/octet-stream");
        response.setHeader("Content-Disposition", "attachment;filename=" + filename + ".xls");
        sheet = workbook.createSheet("sheet1");

        List<String> titles = (List<String>) model.get("titles");
        int len = titles.size();
        HSSFCellStyle headerStyle = workbook.createCellStyle(); //?
        headerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        headerStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        HSSFFont headerFont = workbook.createFont(); //
        headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        headerFont.setFontHeightInPoints((short) 11);
        headerStyle.setFont(headerFont);
        short width = 20, height = 25 * 20;
        sheet.setDefaultColumnWidth(width);
        for (int i = 0; i < len; i++) { //
            String title = titles.get(i);
            cell = getCell(sheet, 0, i);
            cell.setCellStyle(headerStyle);
            setText(cell, title);
        }
        sheet.getRow(0).setHeight(height);

        HSSFCellStyle contentStyle = workbook.createCellStyle(); //?
        contentStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        List<PageData> varList = (List<PageData>) model.get("varList");
        int varCount = varList.size();
        for (int i = 0; i < varCount; i++) {
            PageData vpd = varList.get(i);
            for (int j = 0; j < len; j++) {
                String varstr = vpd.getString("var" + (j + 1)) != null ? vpd.getString("var" + (j + 1)) : "";
                cell = getCell(sheet, i + 1, j);
                cell.setCellStyle(contentStyle);
                setText(cell, varstr);
            }
        }
    }
}