JSP：无法弄清楚如何为GlassFish 3.1.2响应设置UTF-8 [英] JSP: can't figure out how to set UTF-8 for GlassFish 3.1.2 response

问题描述

我正在使用GlassFish 3.1.2，并在访问我的JSP页面时看到以下警告：

I'm using GlassFish 3.1.2 and seeing the following warning whenever I access my JSP pages:

PWC4011：无法设置从
context / myapp请求字符编码为UTF-8，因为请求参数已被读取，
或ServletRequest.getReader（）已被调用

PWC4011: Unable to set request character encoding to UTF-8 from context /myapp, because request parameters have already been read, or ServletRequest.getReader() has already been called

我的JSP文件以：

<%@page pageEncoding="UTF-8"%>

我的 WEB-INF / glassfish-web.xml 文件是：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glassfish-web-app PUBLIC "-//GlassFish.org//DTD GlassFish Application Server 3.1 Servlet 3.0//EN" "http://glassfish.org/dtds/glassfish-web-app_3_0-1.dtd">
<glassfish-web-app>
    <parameter-encoding default-charset="UTF-8"/>

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

</glassfish-web-app>

我的 WEB-INF / web.xml 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/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
     version="2.5">

我相信警告被触发（根据 setCharacterEncoding（）代码时，.com / display / GlassFish / FaqWebAppUnableToSetRequestCharEncodingrel =nofollow noreferrer>这里）一个JSP页面中的 request.getAttribute（），如

I believe the warning is triggered (as per here) when executing the setCharacterEncoding() code that I always place before the first instance of request.getAttribute() in a JSP page, such as

request.setCharacterEncoding("UTF-8");
personName = request.getAttribute("personName");

但我不知道如何解决这个问题。

but I've no idea how to resolve this.

我的 web.xml 使用servlet 2.5，我相信是JSP 2.1（我知道JSP 1.x不支持UTF-8，但我认为 JSP 2.1支持UTF-8。我尝试升级 web.xml 文件以开始

My web.xml uses servlet 2.5, which I believe is JSP 2.1 (I know JSP 1.x does not support UTF-8, but I think JSP 2.1 does support UTF-8). I tried upgrading the web.xml file to start with

<?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">

但这只是导致GlassFish从

but this just led to GlassFish severe errors starting with

[＃| 2014-11-06T16：11：09.772-0800 | SEVERE | glassfish3.1.2 | javax.enterprise.system.tools.deployment.org.glassfish.deployment.common | _ThreadID = 1; _ThreadName = Thread-2; | DPL8015：
部署描述符文件中的部署描述符无效
归档[myapp]中的WEB-INF / web.xml。第25行第23列 -
cvc-complex-type.2.4.a：从
元素'display-name'开始发现无效的内容。其中一个
'{ http://java.sun.com/xml/ns / javaee ：servlet-class，
http：// java .sun.com / xml / ns / javaee ：jsp-file，
http://java.sun.com/xml/ns/javaee ：init-param，
http://java.sun.com/xml/ns/javaee ：load-on-startup，
http://java.sun.com/xml/ns/javaee ：enabled，
< a href =http://java.sun.com/xml/ns/javaee =nofollow noreferrer> http://java.sun.com/xml/ns/javaee ：async-支持，
http://java.sun.com/xml/ns/javaee ：run-as，
http ：//java.sun.com/xml/ns/javaee ：security-role-ref，
http://java.sun.com/xml/ns/javaee ：multipart-config}'。|＃]

[#|2014-11-06T16:11:09.772-0800|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 25 Column 23 -- cvc-complex-type.2.4.a: Invalid content was found starting with element 'display-name'. One of '{"http://java.sun.com/xml/ns/javaee":servlet-class, "http://java.sun.com/xml/ns/javaee":jsp-file, "http://java.sun.com/xml/ns/javaee":init-param, "http://java.sun.com/xml/ns/javaee":load-on-startup, "http://java.sun.com/xml/ns/javaee":enabled, "http://java.sun.com/xml/ns/javaee":async-supported, "http://java.sun.com/xml/ns/javaee":run-as, "http://java.sun.com/xml/ns/javaee":security-role-ref, "http://java.sun.com/xml/ns/javaee":multipart-config}' is expected.|#]

每当我进行更改，我确保重新启动GlassFish服务器。我假设GlassFish自动检测 glassfish-web.xml 的存在，但是让我知道如果我需要将其配置为GlassFish的某个地方，以实现该文件的存在。

Whenever I make changes I make sure I restart GlassFish server. I'm assuming GlassFish auto-detects the presence of glassfish-web.xml, but let me know if I need to configure it somewhere for GlassFish to realize this file exists.

我遵循了我可以在网上找到的所有建议。需要一些帮助来弄清楚这一点。任何建议非常感激。

I've followed all the advice I could find online. Need some help to figure this out. Any advice much appreciated.

更新1

我注意到，如果我删除请求.setCharacterEncoding（UTF-8）; 从JSP页面，以便以下

I notice that if I remove request.setCharacterEncoding("UTF-8"); from the JSP page so that the following

request.setCharacterEncoding("UTF-8");
personName = request.getAttribute("personName");

只是

personName = request.getAttribute("personName");

警告消失。这是否意味着 request.setCharacterEncoding（UTF-8）; 应仅在发布 request.getParameter（）之前存在于Java servlet中，而不是在JSP页面中？

that the warning goes away. Does this mean that request.setCharacterEncoding("UTF-8"); should only be present in the Java servlets before issuing a request.getParameter(), and NOT in the JSP pages at all?

更新2

我在GlassFish server.log文件中仍然看到编码警告，虽然这次不是来自我的网络应用程序：

I'm still seeing an encoding warning in GlassFish server.log file, although this time it is not coming from my web app:

[＃ | 2014-11-10T10：02：57.234-0800 |警告| glassfish3.1.2 | org.apache.catalina.connector.Request | _ThreadID = 57; _ThreadName = Thread-2; | PWC4011：
无法设置请求字符编码到上下文中的UTF-8，
因为请求参数已被读取，或
ServletRequest.getReader（）已经被调用|＃]

[#|2014-11-10T10:02:57.234-0800|WARNING|glassfish3.1.2|org.apache.catalina.connector.Request|_ThreadID=57;_ThreadName=Thread-2;|PWC4011: Unable to set request character encoding to UTF-8 from context , because request parameters have already been read, or ServletRequest.getReader() has already been called|#]

不知道这是来自哪里，或如何修复，但是我将通过在GlassFish管理控制台 -Dfile中添加选项来修改GlassFish JVM编码.encoding = UTF8 这里：配置> server-conf ig> JVM设置> JVM选项，然后重新启动服务器。

Not sure where this is coming from, or how to fix, but I'll modify GlassFish JVM encoding by adding in the option from the GlassFish admin console -Dfile.encoding=UTF8 here: Configurations>server-config>JVM Settings>JVM Options, and restart server.

我还添加了这里显示的字符集过滤器：如何让UTF-8在Java webapps中工作？虽然，它是为Tomcat，我希望它仍然适用于GlassFish。

I also added the character set filter shown here: How to get UTF-8 working in Java webapps? . Although, it's made for Tomcat, I hope it still works for GlassFish.

推荐答案

解决方案：
创建/编辑文件glassfish-web.xml（文件夹WEB-INF）：

The Solution: Create/edit the file glassfish-web.xml (folder WEB-INF):

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glassfish-web-app PUBLIC "-//GlassFish.org//DTD GlassFish Application Server 3.1 Servlet 3.0//EN" 
"http://glassfish.org/dtds/glassfish-web-app_3_0-1.dtd">
<glassfish-web-app error-url="">
    <class-loader delegate="true"/>
    <!-- Change the default character encoding from ISO-8859-1 to UTF-8 -->
    <parameter-encoding default-charset="UTF-8"/>
    <jsp-config>
        <property name="keepgenerated" value="true">
            <description>Keep a copy of the generated servlet class' java code.</description>
        </property>
    </jsp-config>
</glassfish-web-app>

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