我在服务器日志中收到以下错误,

08-May-2018 12:00:07.460 SEVERE [https-jsse-nio-8443-exec-1] org.apache.catalina.core.ApplicationDispatcher.invoke Servlet.service() for servlet [jsp] threw exception java.lang.IllegalStateException: getOutputStream() has already been called for this response
    at org.apache.catalina.connector.Response.getWriter(Response.java:624)
    at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:211)
    at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:109)
    at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:109)
    at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:109)
    at org.springframework.security.web.util.OnCommittedResponseWrapper.getWriter(OnCommittedResponseWrapper.java:149)
    at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:118)
    at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:111)
    at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:176)
    at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:120)
    at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:75)
    at org.apache.jsp.WEB_002dINF.views.uncaughtException_html._jspService(uncaughtException_html.java:209)


    08-May-2018 12:00:07.468 SEVERE [https-jsse-nio-8443-exec-1] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [xyz] in context with path [] threw exception java.lang.IllegalStateException: getOutputStream() has already been called for this response] with root cause java.lang.IllegalStateException: getOutputStream() has already been called for …

目前我正在将 Hibernate(MySQL) 与 Spring 一起使用，配置对我来说运行良好，但是一旦我配置了另一个配置 mongo-config.xml 文件并尝试使用 mongodb 运行测试用例，它就会显示 Error created bean with name .. ..从第一次配置。

下面是我的 mongo-config.xml

<context:annotation-config />
<context:component-scan base-package="com.test.mongo" />
<context:property-placeholder location="classpath:mongo-dao.properties" />

<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
    <constructor-arg name="mongoDbFactory" ref="mongoDbFactory" />

</bean>
<bean id="mongoDbFactory" class="org.springframework.data.mongodb.core.MongoFactoryBean">
    <property name="driverClassName" value="${spring.datasource.driverClassName}" />
    <property name="host" value="${spring.data.mongodb.host}" />
    <property name="port" value="${spring.data.mongodb.port}" />
    <property name="databaseName" value="${spring.data.mongodb.database}" />

我的第一个休眠配置看起来像

<context:component-scan base-package="com.hb.dao" />
<tx:annotation-driven transaction-manager="transactionManager" />

<bean id="dataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="${db.jdbc.driverClassName}" />
    <property name="url" value="${db.jdbc.url}" />
    <property name="username" value="${db.jdbc.username}" />
    <property name="password" value="${db.jdbc.password}" …

任何人都可以帮我解释上面代码的输出..它将在不同的编译器中打印不同的输出.哪一个要考虑.

码

#include<stdio.h>

int main()
{
    int a=0, b=1, c=2;
    *((a+1 == 1) ? &b : &a) = a ? b : c;
    printf("%d, %d, %d\n", a, b, c);
    return 0;
}

产量

0,2,2

_{此输出来自Codeblocks}