001/* 002 * Copyright 2002-2015 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.web.servlet.view.document; 018 019import java.io.IOException; 020import java.util.Map; 021import javax.servlet.http.HttpServletRequest; 022import javax.servlet.http.HttpServletResponse; 023 024import org.apache.poi.ss.usermodel.Workbook; 025import org.apache.poi.xssf.streaming.SXSSFWorkbook; 026 027/** 028 * Convenient superclass for Excel document views in the Office 2007 XLSX format, 029 * using POI's streaming variant. Compatible with Apache POI 3.9 and higher. 030 * 031 * <p>For working with the workbook in subclasses, see 032 * <a href="https://poi.apache.org">Apache's POI site</a>. 033 * 034 * @author Juergen Hoeller 035 * @since 4.2 036 */ 037public abstract class AbstractXlsxStreamingView extends AbstractXlsxView { 038 039 /** 040 * This implementation creates a {@link SXSSFWorkbook} for streaming the XLSX format. 041 */ 042 @Override 043 protected SXSSFWorkbook createWorkbook(Map<String, Object> model, HttpServletRequest request) { 044 return new SXSSFWorkbook(); 045 } 046 047 /** 048 * This implementation disposes of the {@link SXSSFWorkbook} when done with rendering. 049 * @see org.apache.poi.xssf.streaming.SXSSFWorkbook#dispose() 050 */ 051 @Override 052 protected void renderWorkbook(Workbook workbook, HttpServletResponse response) throws IOException { 053 super.renderWorkbook(workbook, response); 054 055 // Dispose of temporary files in case of streaming variant... 056 ((SXSSFWorkbook) workbook).dispose(); 057 } 058 059}