java - 什么是让 <jsp-config> 标签工作的标准 web.xml java header ？

Question

我有一个 GlassFish 3.1.2 应用服务器，并且我已经开始使用 JSP 页面，所以我有兴趣为 UTF-8 正确配置编码。

我的原创作品 web.xml文件开始于

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" 
   "http://java.sun.com/dtd/web-app_2_3.dtd"> 

但后来我在其中添加了以下内容以强制使用 UTF-8 编码

<jsp-config>
   <jsp-property-group>
       <url-pattern>*.jsp</url-pattern>
       <page-encoding>UTF-8</page-encoding>
   </jsp-property-group> 
</jsp-config>

报告了我的 GlassFish 3.1.2 服务器日志文件

Element type <jsp-config> must be declared web.xml

为了修复错误，我更改了 web.xml 的开头文件是

<?xml version="1.0" encoding="UTF-8"?>  
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
 version="2.4" >

现在我收到 GlassFish 服务器错误

Invalid Deployment Descriptors in Deployment descriptor file WEB-INF/web.xml ...
One of '{"http://java.sun.com/xml/ns/j2ee":servlet-class, 
         "http://java.sun.com/xml/ns/j2ee":jsp-file}' is expected.

我的语法有问题吗？如何获得 <jsp-config>在 xml.web 中使用 header 2.3 版本的文件？

更新 1

如果我启动 web.xml归档为

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_3.xsd"
    version="2.3">

<display-name>myApp</display-name>
<description>My Application</description>

<listener>
    <listener-class>...</listener-class>
</listener>

<servlet>
    <servlet-name>MessageBrokerServlet</servlet-name>
    <display-name>MessageBrokerServlet</display-name>
    <servlet-class>...</servlet-class>
    <init-param>
        <param-name>...</param-name>
        <param-value>...</param-value>
   </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet>
  <servlet-name>Reg</servlet-name>
  <servlet-class>com.mydomain.servlet.Reg</servlet-class>
</servlet>

<servlet-mapping>
   <servlet-name>Reg</servlet-name>
   <url-pattern>/reg</url-pattern>
</servlet-mapping>

<welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
</welcome-file-list>

<jsp-config>
  <jsp-property-group>
      <url-pattern>*.jsp</url-pattern>
      <page-encoding>UTF-8</page-encoding>
  </jsp-property-group>
</jsp-config>

</web-app>

我看到这个错误:

[#|2014-11-06T13:03:59.779-0800|SEVERE|glassfish3.1.2|javax.enterprise.system.tools.deployment.org.glassfish.deployment.common|_ThreadID=1;_ThreadName=Thread-2;|DPL8015:

Invalid Deployment Descriptors in Deployment descriptor file WEB-INF/web.xml in archive [myapp]. Line 7 Column 41 -- s4s-elt-character: Non-whitespace characters are not allowed in schema elements other than 'xs:appinfo' and 'xs:documentation'. Saw 'var _U = "undefined"; var g_HttpRelativeWebRoot = "/ocom/";'.|#]

[#|2014-11-06T13:03:59.779-0800|SEVERE|glassfish3.1.2|javax.enterprise.system.tools.deployment.org.glassfish.deployment.common|_ThreadID=1;_ThreadName=Thread-2;|DPL8005: Deployment Descriptor parsing failure : s4s-elt-character: Non-whitespace characters are not allowed in schema elements other than 'xs:appinfo' and 'xs:documentation'. Saw 'var _U = "undefined"; var g_HttpRelativeWebRoot = "/ocom/";'.|#]

更新 2

或者，我还有一个 glassfish-web.xml文件在 WEB-INF目录。如果我还原 web.xml将文件恢复原状并放置 <jsp-config> glassfish-web.xml 中的部分而不是 web.xml ，服务器启动正常。哪个文件是<jsp-config>应该进去，还是重要？

Answer 1

要使用 UTF-8 配置 JSP，您需要在 jsp 的第一行使用:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> 

你应该使用它，但要使用你的版本:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">

我的 web.xml 的一个例子

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">
    <display-name>base</display-name>
    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                /WEB-INF/spring/spring-mvc-dispatcher.xml
            </param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/spring/spring-database.xml,
            /WEB-INF/spring/spring-security.xml
        </param-value>
    </context-param>
    <filter>
        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>springSecurityFilterChain</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>