java.lang.IllegalStateException：getOutputStream方法（

2019-07-04 11:00发布

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我想的iReport / JasperReport的在JSF 2但是，当我生成的PDF我得到这个错误。 我搜索，发现了一些类似的问题和解决方案，但毫无效果。 对不起，再次发布了同样的问题。 但是，我尝试了所有可能的解决方案，我发现，但没有为我工作。 请帮忙 

java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:637)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:214)
at com.sun.faces.context.ExternalContextImpl.getResponseOutputWriter(ExternalContextImpl.java:723)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.createResponseWriter(FaceletViewHandlingStrategy.java:1009)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:382)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:124)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
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:594)
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.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
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:999)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)

以下是功能

public void init() throws IOException, JRException {
    JRBeanCollectionDataSource beanCollectionDataSource = new JRBeanCollectionDataSource(listReportObjects);
    ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
    HttpServletResponse httpServletResponse = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse();
    servletOutputStream = httpServletResponse.getOutputStream();
    ServletContext servletContext = (ServletContext) externalContext.getContext();
    String reportLocation = servletContext.getRealPath("/web/ireport/monthlyReport.jasper");
    jasperPrint = JasperFillManager.fillReport(reportLocation, new HashMap<String, Object>(), beanCollectionDataSource);
}


public void PDF(ActionEvent actionEvent) throws IOException, JRException {
    System.out.println("*****************PDF*********************");
    init();
    JasperExportManager.exportReportToPdfStream(jasperPrint, servletOutputStream);
}

而XHTML代码：;

我的POM文件： 

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.nic</groupId>
<artifactId>RFD</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>

<name>RFD</name>

<properties>
    <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <netbeans.hint.deploy.server>Tomcat</netbeans.hint.deploy.server>
</properties>

<dependencies>
    <dependency>
        <groupId>org.eclipse.persistence</groupId>
        <artifactId>eclipselink</artifactId>
        <version>2.3.2</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.persistence</groupId>
        <artifactId>javax.persistence</artifactId>
        <version>2.0.3</version>
    </dependency>
    <dependency>
        <groupId>org.eclipse.persistence</groupId>
        <artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
        <version>2.3.2</version>
        <scope>provided</scope>
    </dependency>        
    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-api</artifactId>
        <version>2.1.13</version>
    </dependency>
    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-impl</artifactId>
        <version>2.1.13</version>
    </dependency>
    <dependency>
        <groupId>taglibs</groupId>
        <artifactId>standard</artifactId>
        <version>1.1.2</version>
    </dependency>
    <!-- PrimeFaces -->
    <dependency>
        <groupId>org.primefaces</groupId>
        <artifactId>primefaces</artifactId>
        <version>3.4.1</version>
    </dependency>  
    <dependency>
        <groupId>org.primefaces.extensions</groupId>
        <artifactId>all-themes</artifactId>
        <version>1.0.8</version>
    </dependency>
    <dependency>
        <groupId>org.primefaces.extensions</groupId>
        <artifactId>primefaces-extensions</artifactId>
        <version>0.6.1</version>
    </dependency>
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>1.3.2</version>
    </dependency>
    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.2.2</version>
    </dependency>       
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate</artifactId>
        <version>3.2.6.ga</version>
        <exclusions>
            <exclusion>
                <artifactId>antlr</artifactId>
                <groupId>antlr</groupId>
            </exclusion>
            <exclusion>
                <artifactId>commons-logging</artifactId>
                <groupId>commons-logging</groupId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>3.3.2.GA</version>
        <exclusions>
            <exclusion>
                <artifactId>commons-logging</artifactId>
                <groupId>commons-logging</groupId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>javax.sql</groupId>
        <artifactId>jdbc-stdext</artifactId>
        <version>2.0</version>
    </dependency>
    <dependency>
        <groupId>javax.transaction</groupId>
        <artifactId>jta</artifactId>
        <version>1.1</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.21</version>
    </dependency>
    <dependency>
        <groupId>c3p0</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.1.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.servicemix.bundles</groupId>
        <artifactId>org.apache.servicemix.bundles.jettison</artifactId>
        <version>1.0.1_5</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>4.1.1.Final</version>
        <type>jar</type>
        <exclusions>
            <exclusion>
                <artifactId>antlr</artifactId>
                <groupId>antlr</groupId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>antlr</groupId>
        <artifactId>antlr</artifactId>
        <version>2.7.7</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.10</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>commons-beanutils</groupId>
        <artifactId>commons-beanutils</artifactId>
        <version>1.8.3</version>
    </dependency>
    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-web-api</artifactId>
        <version>6.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.mail</groupId>
        <artifactId>mail</artifactId>
        <version>1.4.5</version>
    </dependency>
    <dependency>
        <groupId>net.sf.jasperreports</groupId>
        <artifactId>jasperreports</artifactId>            
        <version>4.8.0</version>
        <exclusions>
            <exclusion>
                <artifactId>commons-beanutils</artifactId>
                <groupId>commons-beanutils</groupId>
            </exclusion>
        </exclusions>
    </dependency>
</dependencies>

<build>

    <plugins>        
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>               
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
                <compilerArguments>
                    <endorseddirs>${endorsed.dir}</endorseddirs>
                </compilerArguments>                    
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.1.1</version>
            <configuration>
                <failOnMissingWebXml>false</failOnMissingWebXml>
                <packagingExcludes>WEB-INF/web.xml</packagingExcludes>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>2.1</version>
            <executions>
                <execution>
                    <phase>validate</phase>
                    <goals>
                        <goal>copy</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>${endorsed.dir}</outputDirectory>
                        <silent>true</silent>
                        <artifactItems>
                            <artifactItem>
                                <groupId>javax</groupId>
                                <artifactId>javaee-endorsed-api</artifactId>
                                <version>6.0</version>
                                <type>jar</type>
                            </artifactItem>
                        </artifactItems>
                    </configuration>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>jasperreports-maven-plugin</artifactId>
            <version>1.0-beta-2</version>
            <configuration>
                <sourceDirectory>/web/ireport</sourceDirectory>
                <outputDirectory>/web/ireport</outputDirectory>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>compile-reports</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>
<repositories>
    <repository>
        <url>http://download.eclipse.org/rt/eclipselink/maven.repo/</url>
        <id>eclipselink</id>
        <layout>default</layout>
        <name>Repository for library EclipseLink (JPA 2.0)</name>
    </repository>
    <repository>
        <url>http://repository.primefaces.org/</url>
        <id>primefaces</id>
        <layout>default</layout>
        <name>Repository for library PrimeFaces 3.2</name>
    </repository>                
</repositories>

请帮忙

我没有使用功能的getOutputStream（）其他地方在我的项目。

Answer 1:

你可能没有那么直接这样做，但在你的代码的几件事情是犯罪嫌疑人，可以进行修改，以获得所需的响应。 你已经得到了比试图要求的响应输出流servlet容器后以外的任何其他理由而没有发生异常试图这样做或这样做两次

1）线

 ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
 HttpServletResponse httpServletResponse = (HttpServletResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse();
 ServletContext servletContext = (ServletContext) externalContext.getContext();

正在重复（和不必要的呼叫）上下文的资源。

2）你没有打电话responseComplete()在你的FacesContext实例，它几乎肯定会保证写文件下载到流将失败

3）虽然我不能肯定这一点，我建议你刚刚从移动你的报表处理actionListener到action上你commandButton和删除ActionListener因此从方法签名参数

4）我不知道是什么类型jasperPrint是的，但你可以使用的JasperReport的JasperRunManager.runReportToPdfStream()接受输入流的功能.jasper的文件输出到您的报告。

您可以将所有并使用下列内容： 

     FacesContext facesContext = FacesContext.getCurrentInstance(); //Get the context ONCE
     HttpServletResponse response = (HttpServletResponse)       facesContext.getExternalContext().getResponse();
     InputStream reportStream =   facesContext.getExternalContext().getResourceAsStream("/web/ireport/monthlyReport.jasper");
try {
    ServletOutputStream servletOutputStream = response.getOutputStream();
    response.setContentType("application/pdf");
    facesContext.responseComplete();

    try {  // Replace this with your desired JR utility method
        JasperRunManager.runReportToPdfStream(reportStream, servletOutputStream, params);
    } catch (JRException ex) {
        //
    }
    servletOutputStream.flush();
    servletOutputStream.close();
} catch (IOException ex) {
   //
} catch (Exception ex) {
       //
   }

无关你的问题，你必须绝对确保路径/web/ireport/*是安全的。 在我看来就像一个公开访问的路径。



Answer 2:

对于其他帮助IM发布我的最终工作（解决）代码

public void init() throws IOException, JRException {
    JRBeanCollectionDataSource beanCollectionDataSource = new JRBeanCollectionDataSource(listReportObjects);
    String reportPath = FacesContext.getCurrentInstance().getExternalContext().getRealPath("/web/ireport/monthlyReport.jasper");
    jasperPrint = JasperFillManager.fillReport(reportPath, new HashMap(), beanCollectionDataSource);
    httpServletResponse = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse();
}


public void pdf() throws IOException, JRException {
    init();
    httpServletResponse.addHeader("Content-disposition", "attachment; filename=report.pdf");
    servletOutputStream = httpServletResponse.getOutputStream();
    JasperExportManager.exportReportToPdfStream(jasperPrint, servletOutputStream);
    FacesContext.getCurrentInstance().responseComplete();
}

和XHTML 

<h:commandButton id="getPDF" value="PDF" actionListener="#{monthlyReportBean.pdf}" />


Answer 3:

使用FacesContext.getCurrentInstance().responseComplete(); 导出报表后，可以解决你的问题。



文章来源: java.lang.IllegalStateException: getOutputStream() has already been called for this response when calling JasperReport
标签： jsf-2 jasper-reports ireport servletexception jasper-plugin
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