Java 在调用 JasperRunManager.runReportToPdfStream 期间获取“Error loading object from InputStream”异常

Getting "Error loading object from InputStream" exception during call JasperRunManager.runReportToPdfStream

提问by Jaichander

I'm trying to generate pdf via button but my problem is this method JasperRunManager.runReportToPdfStream(reportStream,servletOutputStream, new HashMap<Object, Object>(), resultSetDataSource);

我正在尝试通过按钮生成 pdf 但我的问题是这种方法 JasperRunManager.runReportToPdfStream(reportStream,servletOutputStream, new HashMap<Object, Object>(), resultSetDataSource);

it is not supporting Hashmap it gives following error

它不支持 Hashmap 它给出以下错误

The method runReportToPdfStream(InputStream, OutputStream, Map<String,Object>, Connection) in the type JasperRunManager is 
 not applicable for the arguments (InputStream, ServletOutputStream, HashMap<Object,Object>, JRResultSetDataSource)

it Supports String parameter like Hashmap<String,Object>while generating pdf it gives following error

它支持字符串参数，例如Hashmap<String,Object>在生成 pdf 时会出现以下错误

net.sf.jasperreports.engine.JRException: Error loading object from InputStream
    at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:219)
    at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:632)
    at net.sf.jasperreports.engine.JasperRunManager.runToPdfStream(JasperRunManager.java:428)
    at net.sf.jasperreports.engine.JasperRunManager.runReportToPdfStream(JasperRunManager.java:849)
    at com.p41.jasper.Jasper.doPost(Jasper.java:103)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
    at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:546)
    at com.sun.faces.application.view.JspViewHandlingStrategy.executePageToBuildView(JspViewHandlingStrategy.java:364)
    at com.sun.faces.application.view.JspViewHandlingStrategy.buildView(JspViewHandlingStrategy.java:154)
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:100)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:410)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at com.p41.setting.FacesFilter.doFilter(FacesFilter.java:153)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.io.StreamCorruptedException: invalid stream header: 3C3F786D
    at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
    at java.io.ObjectInputStream.<init>(Unknown Source)
    at net.sf.jasperreports.engine.util.ContextClassLoaderObjectInputStream.<init>(ContextClassLoaderObjectInputStream.java:53)
    at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:214)

Servlet

小服务程序

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.HashMap;
import java.util.HashSet;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.jasperreports.engine.JRResultSetDataSource;
import net.sf.jasperreports.engine.JasperRunManager;

public class Jasper extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Connection connection;
        Statement statement;
        ResultSet resultSet;
        response.setContentType("text/html");
        String si = request.getParameter("input");

        ServletOutputStream servletOutputStream = response.getOutputStream();

        byte[] bytes = null;

        InputStream reportStream = getServletConfig().getServletContext().getResourceAsStream("WEB-INF/HR/Jasp.jasper");
        System.out.println("Print" + si);
        try {
            System.out.println("Second print" + si);

            String query = "SELECT  Where Empno = '" + si + "' ";
            Class.forName("com.mysql.jdbc.Driver");
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/schemedb?user=root&password=root");
            statement = connection.createStatement();
            resultSet = statement.executeQuery(query);
            JRResultSetDataSource resultSetDataSource = new JRResultSetDataSource(resultSet);

            response.setContentType("application/pdf");

            servletOutputStream.flush();
            servletOutputStream.close();

            System.out.println("print" + reportStream);
            System.out.println("print" + servletOutputStream);
            System.out.println("print" + resultSetDataSource);
            JasperRunManager.runReportToPdfStream(reportStream, servletOutputStream, new HashMap<Object, Object>(), resultSetDataSource);

            resultSet.close();
            statement.close();
            connection.close();
            response.setContentType("application/pdf");
            servletOutputStream.flush();
            servletOutputStream.close();
        } catch (Exception e) {
            StringWriter stringWriter = new StringWriter();
            PrintWriter printWriter = new PrintWriter(stringWriter);
            e.printStackTrace(printWriter);
            response.setContentType("text/plain");
            response.getOutputStream().print(stringWriter.toString());
        }
    }
}

采纳答案by Jaichander

Solution is I Removed Run Report pdf stream and used method as exportReport to pdf Stream

解决方案是我删除了运行报告 pdf 流并使用方法作为 exportReport to pdf Stream

JasperRunManager.runReportToPdfStream(reportStream,servletOutputStream, new HashMap<Object, Object>(), resultSetDataSource);

Coding:-

编码：-

 InputStream reportStream = getServletConfig().getServletContext().getResourceAsStream("WEB-INF/HR/Jasp.jrxml");


ByteArrayOutputStream baos =new ByteArrayOutputStream();
response.setContentType("application/pdf");

JasperDesign design = JRXmlLoader.load(reportStream);

JasperReport report = JasperCompileManager.compileReport(design);
JRResultSetDataSource jasperReports = new JRResultSetDataSource(rs);
JasperPrint print = JasperFillManager.fillReport(report, new HashMap(), jasperReports);


net.sf.jasperreports.engine.JasperExportManager.exportReportToPdfStream(print,baos);
response.setContentLength(baos.size());
ServletOutputStream out1 = response.getOutputStream();
baos.writeTo(out1);
out1.flush();
rs.close();
st.close();
conn.close();