jasper生成动态报表

jasper生成动态报表

业务：客户点击链接（get请求），在页面显示报表。根据请求信息动态获取报表。
环境/工具：springboot ，IDEA编译器， TIBCO JasperSoft

TIBCO JasperSoft 下载地址（百度云）
链接：https://pan.baidu.com/s/12AE1be2NW_2zpGFtoN52_A
提取码：yin8

配置依赖

添加工具类

创建测试类

测试

下载Jaspersoft

绘制报表

生成jasper文件

修改jrxml

Step1 Maven依赖

<!--        <dependencies>下-->
        <dependency>
            <groupId>net.sf.jasperreports</groupId>
            <artifactId>jasperreports</artifactId>
            <version>6.0.3</version>
        </dependency>
        <!--报表相关-->
        <dependency>
            <groupId>net.sf.ezmorph</groupId>
            <artifactId>ezmorph</artifactId>
            <version>1.0.6</version>
        </dependency>
        <dependency>
            <groupId>net.coobird</groupId>
            <artifactId>thumbnailator</artifactId>
            <version>0.4.7</version>
        </dependency>
        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
        </dependency>

        <dependency>
            <groupId>net.sf.jasperreports</groupId>
            <artifactId>jasperreports</artifactId>
            <version>6.0.0</version>
        </dependency>
        <dependency>
            <groupId>net.sf.jasperreports</groupId>
            <artifactId>jasperreports-fonts</artifactId>
            <version>6.0.0</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.0</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itext-pdfa</artifactId>
            <version>5.5.0</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itext-asian</artifactId>
            <version>5.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>fontbox</artifactId>
            <version>2.0.9</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.pdfbox/pdfbox -->
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>2.0.9</version>
        </dependency>
<!--        //如果直接使用文中附出的工具类,该依赖虽然不会被调用,但是不加上会报错-->
        <dependency>
            <groupId>org.codehaus.groovy</groupId>
            <artifactId>groovy-all</artifactId>
            <version>2.2.2</version>
        </dependency>






<!--        <build><plugins>下-->
		<plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <!--<encoding>UTF-8</encoding>-->
                    <nonFilteredFileExtensions>
                        <nonFilteredFileExtension>p12</nonFilteredFileExtension>
                        <nonFilteredFileExtension>xls</nonFilteredFileExtension>
                        <nonFilteredFileExtension>xlsx</nonFilteredFileExtension>
                        <nonFilteredFileExtension>jrxml</nonFilteredFileExtension>
                        <nonFilteredFileExtension>jasper</nonFilteredFileExtension>
                        <nonFilteredFileExtension>ttf</nonFilteredFileExtension>
                    </nonFilteredFileExtensions>
                </configuration>
            </plugin>

Step 2 工具类

1.JasperHelper.java

import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.base.JRBaseReport;
import net.sf.jasperreports.engine.export.*;
import net.sf.jasperreports.engine.util.JRLoader;
import net.sf.jasperreports.j2ee.servlets.ImageServlet;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.lang.reflect.Field;
import java.net.URLEncoder;
import java.sql.Connection;
import java.util.Base64;
import java.util.Map;

@SuppressWarnings("deprecation")
public class JasperHelper {
    public static final String PRINT_TYPE = "print";
    public static final String PDF_TYPE = "pdf";
    public static final String EXCEL_TYPE = "excel";
    public static final String HTML_TYPE = "html";
    public static final String WORD_TYPE = "word";



    public static enum DocType {
        PDF, HTML, XLS, XML, RTF
    }
    @SuppressWarnings("rawtypes")
    public static JRAbstractExporter getJRExporter(DocType docType) {
        JRAbstractExporter exporter = null;
        switch (docType) {
            case PDF:
                exporter = new JRPdfExporter();
                break;
            case HTML:
                exporter = new JRHtmlExporter();
                break;
            case XLS:
                exporter = new JExcelApiExporter();
                break;
            case XML:
                exporter = new JRXmlExporter();
                break;
            case RTF:
                exporter = new JRRtfExporter();
                break;
        }
        return exporter;
    }





    public static String showPdf(String type1, String reportfile, Map parameters, JRDataSource conn, String type) throws Exception {
//        request.setCharacterEncoding("utf-8");
//        response.setCharacterEncoding("utf-8");
//        response.setContentType("text/html");
//        response.setContentType("application/pdf");
        JRAbstractExporter exporter = getJRExporter(JasperHelper.DocType.PDF);
        JasperPrint jasperPrint = JasperFillManager.fillReport(reportfile, parameters, conn);
//        request.getSession().setAttribute("net.sf.jasperreports.j2ee.jasper_print", jasperPrint);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
        exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos);
        exporter.exportReport();
        byte[] bytes = baos.toByteArray();
        File file = new File("/usr/local/src/huier-product/print/1.pdf");
        FileOutputStream fos = new FileOutputStream(file);
        fos.write(bytes);
        fos.close();
        //pdf转图片
        if(type1.equals("barcode")){
            PdfUtil.pdf2pngBarcode("/usr/local/src/huier-product/print","1");
        }else {
            PdfUtil.pdf2pngShunFeng("/usr/local/src/huier-product/print","1");
        }
//        PdfUtil.pdf2png("/usr/local/src/huier-product/print","1");
//        File image = new File("D:\\apache-tomcat-6.0.29\\imag\\1.png");
        String base = fileToBase64("/usr/local/src/huier-product/print/1.png");
        return base;
//        printUtil.drawImage("D:\\apache-tomcat-6.0.29\\imag\\1.jpg", type1);
    }

    public static String showPdf(JasperPrint jasperPrint) throws Exception {
        JRAbstractExporter exporter = getJRExporter(JasperHelper.DocType.PDF);
        JasperPrint jasperPrint1=jasperPrint;
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint1);
        exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos);
        exporter.exportReport();
        byte[] bytes = baos.toByteArray();
        File file = new File("/usr/local/src/huier-product/print/1.pdf");
        FileOutputStream fos = new FileOutputStream(file);
        fos.write(bytes);
        fos.close();
        String base = fileToBase64("/usr/local/src/huier-product/print/1.png");
        return base;
    }

    public static  String fileToBase64(String path) {
        String base64 = null;
        InputStream in = null;
        try {
            File file = new File(path);
            in = new FileInputStream(file);
            byte[] bytes = new byte[(int) file.length()];
            in.read(bytes);
            base64 = Base64.getEncoder().encodeToString(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return base64;
    }

    public static void showPdf(String defaultFilename, String reportfile, HttpServletRequest request, HttpServletResponse response, Map parameters, Connection conn) throws JRException, IOException {
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/html");
        response.setContentType("application/pdf");
        JRAbstractExporter exporter = getJRExporter(JasperHelper.DocType.PDF);
        JasperPrint jasperPrint = JasperFillManager.fillReport(reportfile, parameters, conn);
        request.getSession().setAttribute("net.sf.jasperreports.j2ee.jasper_print", jasperPrint);
        OutputStream out = response.getOutputStream();
        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
        exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, out);
        exporter.exportReport();
        out.flush();
    }


    public static void prepareReport(JasperReport jasperReport, String type) {
        /*
         * 如果导出的是excel，则需要去掉周围的margin
         */
        if ("excel".equals(type))
            try {
                Field margin = JRBaseReport.class
                        .getDeclaredField("leftMargin");
                margin.setAccessible(true);
                margin.setInt(jasperReport, 0);
                margin = JRBaseReport.class.getDeclaredField("topMargin");
                margin.setAccessible(true);
                margin.setInt(jasperReport, 0);
                margin = JRBaseReport.class.getDeclaredField("bottomMargin");
                margin.setAccessible(true);
                margin.setInt(jasperReport, 0);
                Field pageHeight = JRBaseReport.class
                        .getDeclaredField("pageHeight");
                pageHeight.setAccessible(true);
                pageHeight.setInt(jasperReport, 2147483647);
            } catch (Exception exception) {
            }
    }

    /**
     * 导出excel
     */
    public static void exportExcel(JasperPrint jasperPrint,
                                   String defaultFilename, HttpServletRequest request,
                                   HttpServletResponse response) throws IOException, JRException {
        /*
         * 设置头信息
         */
        response.setContentType("application/vnd.ms-excel");
        String defaultname = null;
        if (defaultFilename.trim() != null && defaultFilename != null) {
            defaultname = defaultFilename + ".xls";
        } else {
            defaultname = "export.xls";
        }

        response.setHeader("Content-Disposition", "attachment; filename=\""
                + URLEncoder.encode(defaultname, "UTF-8") + "\"");


        ServletOutputStream ouputStream = response.getOutputStream();
        JRXlsExporter exporter = new JRXlsExporter();

        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);

        exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, ouputStream);

        exporter.setParameter(
                JRXlsExporterParameter.IS_REMOVE_EMPTY_SPACE_BETWEEN_ROWS,
                Boolean.TRUE); // 删除记录最下面的空行

        exporter.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET,
                Boolean.FALSE);// 删除多余的ColumnHeader
        //
        exporter.setParameter(JRXlsExporterParameter.IS_WHITE_PAGE_BACKGROUND,
                Boolean.FALSE);// 显示边框
        exporter.exportReport();
        ouputStream.flush();
        ouputStream.close();
    }


    /**
     * 导出pdf，注意此处中文问题，
     *
     * 这里应该详细说：主要在ireport里变下就行了。看图
     *
     * 1）在ireport的classpath中加入iTextAsian.jar 2）在ireport画jrxml时，看ireport最左边有个属性栏。
     *
     * 下边的设置就在点字段的属性后出现。 pdf font name ：STSong-Light ，pdf encoding ：UniGB-UCS2-H
     */
    private static void exportPdf(JasperPrint jasperPrint,
                                  String defaultFilename, HttpServletRequest request,
                                  HttpServletResponse response) throws IOException, JRException {
        response.setContentType("application/pdf");
        String defaultname = null;
        if (defaultFilename.trim() != null && defaultFilename != null) {
            defaultname = defaultFilename + ".pdf";
        } else {
            defaultname = "export.pdf";
        }
        String fileName = new String(defaultname.getBytes("GBK"), "ISO8859_1");
        response.setHeader("Content-disposition", "attachment; filename="
                + fileName);
        ServletOutputStream ouputStream = response.getOutputStream();
        JasperExportManager.exportReportToPdfStream(jasperPrint, ouputStream);
        ouputStream.flush();
        ouputStream.close();
    }

    /**
     * 导出html
     */
    private static void exportHtml(JasperPrint jasperPrint,
                                   String defaultFilename, HttpServletRequest request,
                                   HttpServletResponse response) throws IOException, JRException {
        response.setContentType("text/html");
        ServletOutputStream ouputStream = response.getOutputStream();
        JRHtmlExporter exporter = new JRHtmlExporter();
        exporter.setParameter(JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN,
                Boolean.FALSE);
        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
        exporter.setParameter(JRExporterParameter.CHARACTER_ENCODING, "UTF-8");
        exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, ouputStream);
        //设置图片文件存放路径，此路径为服务器上的绝对路径
        String imageDIR =request.getSession().getServletContext().getRealPath("/");
        exporter.setParameter(JRHtmlExporterParameter.IMAGES_DIR_NAME, imageDIR);

        //设置图片请求URI
        String imageURI = request.getContextPath() + "/";
        exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI, imageURI);

        //设置导出图片到图片存放路径
        exporter.setParameter(JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN, Boolean.TRUE);
        exporter.setParameter(JRHtmlExporterParameter.IS_OUTPUT_IMAGES_TO_DIR, Boolean.TRUE);

        exporter.exportReport();

        ouputStream.flush();
        ouputStream.close();
    }

    /**
     * 导出word
     */
    @SuppressWarnings("rawtypes")
    private static void exportWord(JasperPrint jasperPrint,
                                   String defaultFilename, HttpServletRequest request,
                                   HttpServletResponse response) throws JRException, IOException {
        response.setContentType("application/msword;charset=utf-8");
        String defaultname = null;
        if (defaultFilename.trim() != null && defaultFilename != null) {
            defaultname = defaultFilename + ".doc";
        } else {
            defaultname = "export.doc";
        }
        String fileName = new String(defaultname.getBytes("GBK"), "utf-8");
        response.setHeader("Content-disposition", "attachment; filename="
                + fileName);
        JRExporter exporter = new JRRtfExporter();
        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
        exporter.setParameter(JRExporterParameter.OUTPUT_STREAM,
                response.getOutputStream());

        exporter.exportReport();
    }

    /**
     * 按照类型导出不同格式文件
     *
     *            数据
     * @param type
     *            文件类型
     * @param is
     *            jasper文件的来源
     * @param request
     * @param response
     */
    public static void export(String type, String defaultFilename, File is,
                              HttpServletRequest request, HttpServletResponse response,
                              Map parameters, Connection conn) {
        try {
            JasperReport jasperReport = (JasperReport) JRLoader.loadObject(is);
            prepareReport(jasperReport, type);

            JasperPrint jasperPrint = JasperFillManager.fillReport(
                    jasperReport, parameters, conn);

            if (EXCEL_TYPE.equals(type)) {
                exportExcel(jasperPrint, defaultFilename, request, response);
            } else if (PDF_TYPE.equals(type)) {
                exportPdf(jasperPrint, defaultFilename, request, response);
            } else if (HTML_TYPE.equals(type)) {
                exportHtml(jasperPrint, defaultFilename, request, response);
            } else if (WORD_TYPE.equals(type)) {
                exportWord(jasperPrint, defaultFilename, request, response);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public static void export(String type, String defaultFilename, File is,
                              HttpServletRequest request, HttpServletResponse response,
                              Map parameters, JRDataSource conn) {
        try {
            JasperReport jasperReport = (JasperReport) JRLoader.loadObject(is);
            prepareReport(jasperReport, type);

            JasperPrint jasperPrint = JasperFillManager.fillReport(
                    jasperReport, parameters, conn);

            if (EXCEL_TYPE.equals(type)) {
                exportExcel(jasperPrint, defaultFilename, request, response);
            } else if (PDF_TYPE.equals(type)) {
                exportPdf(jasperPrint, defaultFilename, request, response);
            } else if (HTML_TYPE.equals(type)) {
                exportHtml(jasperPrint, defaultFilename, request, response);
            } else if (WORD_TYPE.equals(type)) {
                exportWord(jasperPrint, defaultFilename, request, response);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    /**
     * 输出html静态页面，必须注入request和response
     *
     *            报表文件使用的图片路径，比如 ../servlets/image?image=
     * @throws JRException
     * @throws IOException
     */
    public static void showHtml(String defaultFilename, String reportfile,
                                HttpServletRequest request, HttpServletResponse response, Map parameters,
                                JRDataSource conn) throws JRException, IOException {


        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/html");

        JRAbstractExporter exporter = getJRExporter(DocType.HTML);

        JasperPrint jasperPrint = JasperFillManager.fillReport(reportfile,
                parameters, conn);
        request.getSession().setAttribute(
                ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE,
                jasperPrint);

        PrintWriter out = response.getWriter();

        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
        exporter.setParameter(JRExporterParameter.OUTPUT_WRITER, out);
        exporter.setParameter(
                JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN,
                Boolean.FALSE);

        //设置图片文件存放路径，此路径为服务器上的绝对路径
        String imageDIR =request.getSession().getServletContext().getRealPath("/");
        exporter.setParameter(JRHtmlExporterParameter.IMAGES_DIR_NAME, imageDIR);

        //设置图片请求URI
        String imageURI = request.getContextPath() + "/";
        exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI, imageURI);

        //设置导出图片到图片存放路径
        exporter.setParameter(JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN, Boolean.TRUE);
        exporter.setParameter(JRHtmlExporterParameter.IS_OUTPUT_IMAGES_TO_DIR, Boolean.TRUE);
        exporter.exportReport();

        out.flush();

    }
    public static void showHtml(String defaultFilename, String reportfile,
                                HttpServletRequest request, HttpServletResponse response, Map parameters,
                                Connection conn) throws JRException, IOException {


        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/html");

        JRAbstractExporter exporter = getJRExporter(DocType.HTML);

        JasperPrint jasperPrint = JasperFillManager.fillReport(reportfile,
                parameters, conn);
        request.getSession().setAttribute(
                ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE,
                jasperPrint);

        PrintWriter out = response.getWriter();

        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
        exporter.setParameter(JRExporterParameter.OUTPUT_WRITER, out);
        exporter.setParameter(
                JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN,
                Boolean.FALSE);
        //设置图片文件存放路径，此路径为服务器上的绝对路径
        String imageDIR =request.getSession().getServletContext().getRealPath("/");
        exporter.setParameter(JRHtmlExporterParameter.IMAGES_DIR_NAME, imageDIR);

        //设置图片请求URI
        String imageURI = request.getContextPath() + "/";
        exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI, imageURI);

        //设置导出图片到图片存放路径
        exporter.setParameter(JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN, Boolean.TRUE);
        exporter.setParameter(JRHtmlExporterParameter.IS_OUTPUT_IMAGES_TO_DIR, Boolean.TRUE);
        exporter.exportReport();
        out.flush();

    }
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static void showPdf(String defaultFilename, String reportfile,
                               HttpServletRequest request, HttpServletResponse response, Map parameters,
                               JRDataSource conn) throws JRException, IOException {

        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/html");
        response.setContentType("application/pdf");

        JRAbstractExporter exporter = getJRExporter(DocType.PDF);

        JasperPrint jasperPrint = JasperFillManager.fillReport(reportfile,
                parameters, conn);
        request.getSession().setAttribute(
                ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE,
                jasperPrint);

        OutputStream out = response.getOutputStream();

        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
        exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, out);
        exporter.exportReport();
        out.flush();
    }

    public static void showPdf(String defaultFilename, HttpServletRequest request, HttpServletResponse response, JasperPrint jasperPrint) throws JRException, IOException {
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/html");
        response.setContentType("application/pdf");
        JRAbstractExporter exporter = getJRExporter(JasperHelper.DocType.PDF);
        JasperPrint jasperPrint1 = jasperPrint;
        request.getSession().setAttribute("net.sf.jasperreports.j2ee.jasper_print", jasperPrint1);
        OutputStream out = response.getOutputStream();
        exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint1);
        exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, out);
        exporter.exportReport();
        out.flush();
    }
}

2.PdfUtil

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;

public class PdfUtil {
    /**
     * 转换全部的pdf
     * @param fileAddress 文件地址
     * @param filename PDF文件名
     */
    public static void pdf2pngBarcode(String fileAddress, String filename) {
        // 将pdf装图片 并且自定义图片得格式大小
        File file = new File(fileAddress+"/"+filename+".pdf");
        try {
            PDDocument doc = PDDocument.load(file);
            PDFRenderer renderer = new PDFRenderer(doc);
            int pageCount = doc.getNumberOfPages();
            for (int i = 0; i < pageCount; i++) {
                BufferedImage image = renderer.renderImageWithDPI(i, 200); // Windows native DPI
//                 BufferedImage srcImage = resize(image, 240, 240);//产生缩略图

                ImageIO.write(image, "PNG", new File(fileAddress+"/"+filename+".png"));
//                changeSize(150, 100, fileAddress + "/" + filename + ".png");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    public static void pdf2pngShunFeng(String fileAddress, String filename) {
        // 将pdf装图片 并且自定义图片得格式大小
        File file = new File(fileAddress + "/" + filename + ".pdf");
        try {
            PDDocument doc = PDDocument.load(file);
            PDFRenderer renderer = new PDFRenderer(doc);
            int pageCount = doc.getNumberOfPages();
            for (int i = 0; i < pageCount; i++) {
                BufferedImage image = renderer.renderImageWithDPI(i, 200); // Windows native DPI
//                 BufferedImage srcImage = resize(image, 240, 240);//产生缩略图

                ImageIO.write(image, "PNG", new File(fileAddress + "/" + filename + ".png"));
//                changeSize(400, 600, fileAddress + "/" + filename + ".png");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static boolean changeSize(int newWidth, int newHeight, String path) {
        BufferedInputStream in = null;
        try {
            in = new BufferedInputStream(new FileInputStream(path));

            //字节流转图片对象
            Image bi = ImageIO.read(in);
            //构建图片流
            BufferedImage tag = new BufferedImage(newWidth, newHeight, BufferedImage.TYPE_INT_RGB);
            //绘制改变尺寸后的图
            tag.getGraphics().drawImage(bi, 0, 0, newWidth, newHeight, null);
            //输出流
            BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(path));
            //JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            //encoder.encode(tag);
            ImageIO.write(tag, "PNG", out);
            in.close();
            out.close();
            return true;
        } catch (IOException e) {
            return false;
        }
    }
}

Step3 测试类（利用SpringMVC直接配置）

package hdu.huier.huierbusiness.controller;

import hdu.huier.huierbusiness.utils.JasperHelper;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;

/**
 * @Author: Yin
 * @Date: 2020/7/4 15:21
 */
@CrossOrigin
@RestController
@EnableTransactionManagement
@RequestMapping("/report")
public class ReportController {
    @Value("${FilePath}")
    String FilePath;
    @Value("${spring.datasource.druid.datasource1.url}")
    String url;
    @Value("${spring.datasource.druid.datasource1.username}")
    String username;
    @Value("${spring.datasource.druid.datasource1.password}")
    String password;

    @GetMapping({"/huierReport"})
    @ResponseBody
    public void huierPrint(HttpServletRequest request, HttpServletResponse response, String s) throws Exception, IOException, JRException {
        //此处使用的pojo类必须和模板文件中的类一致,否则无法正确生成.
        HashMap<String,Object> hashMap = new HashMap<>(2);
        //这里的参数名与参数类型都要与jasper报表中的一致
        hashMap.put("stoid",1L);
        hashMap.put("stogctid","1212");
        List<HashMap> userList = Arrays.asList(hashMap,hashMap);
        //模拟数据源
        JRDataSource jrDataSource = new JRBeanCollectionDataSource(userList);
        File reporeFile = new File(this.FilePath + "/pp.jasper");
//        参数说明: 文件名   jasper文件路径  请求  回复   请求参数(Map)  数据库连接
        JasperHelper.showPdf("test1", reporeFile.getPath(), request, response, new HashMap(), jrDataSource);
    }

    @GetMapping({"/huierReport2"})
    @ResponseBody
    public void huierPrint2(HttpServletRequest request, HttpServletResponse response, String s) throws Exception, IOException, JRException {
        HashMap<String,Object> t = new HashMap<>();
        t.put("ceshi","1");
        String dburl = this.url;
        String dbuser = this.username;
        String dbpassword = this.password;
        Connection conn = DriverManager.getConnection(dburl, dbuser, dbpassword);
        File reporeFile = new File(this.FilePath + "/p3.jasper");
        JasperHelper.showPdf("test2", reporeFile.getPath(), request, response, t, conn);
    }
}

到这里我们就把环境配好了，现在我们需要进行报表的编辑，也就是生成jrxml,jasper文件。

Step4 绘制报表

打开TIBCO Jaspersoft

看到页面如下：【这里报表的绘制不多做介绍，看参看其他博主教程，这里附上一个链接：https://www.cnblogs.com/sharpest/p/6094031.html】

现在假如绘制了这样一张报表：

然后点击preview，会显示这样的数据：

然后点击build 获取jasper文件

这样，一张静态报表就完成了，放到合适的路径，就可以回到step3进行测试了。

Step5 实现动态sql

刚才已经实现了报表的生成，但还是达不到我们的需求，我们要将刚才的静态sql改成动态sql。我们去修改jrxml部分代码实现动态sql。
点击Source，进行xml查看

改成下面的样子

然后进行build，形成新的jasper。回到step3

@GetMapping({"/huierReport2"})
@ResponseBody
public void huierPrint2(HttpServletRequest request, HttpServletResponse response,@RequestParam String nioid) throws Exception, IOException, JRException {
        HashMap<String,Object> t = new HashMap<>();
        t.put("nioid",nioid);
        String dburl = this.url;
        String dbuser = this.username;
        String dbpassword = this.password;
        Connection conn = DriverManager.getConnection(dburl, dbuser, dbpassword);
        File reporeFile = new File(this.FilePath + "/2p.jasper");
        JasperHelper.showPdf("test2", reporeFile.getPath(), request, response, t, conn);
    }

最后，访问路径，即可动态获取报表

成功 撒花