我正在尝试通过按钮生成pdf但我的问题是这个方法
JasperRunManager.runReportToPdfStream(reportStream,servletOutputStream, new HashMap<Object, Object>(), resultSetDataSource);
它不支持Hashmap，它会出现以下错误
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)
它支持字符串参数，如Hashmap<String,Object>，同时生成pdf，它会产生以下错误
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)
的Servlet
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());
}
}
}
答案 0 :(得分：2)
解决方案是我删除了运行报告pdf流和使用的方法作为exportReport到pdf流
JasperRunManager.runReportToPdfStream(reportStream,servletOutputStream, new HashMap<Object, Object>(), resultSetDataSource);
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();