我正在使用 GlassFish 3.1.2,每当我访问我的 JSP 页面时都会看到以下警告:
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 文件开始于:
<%@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">
我相信在执行 setCharacterEncoding()
代码时会触发警告(根据 here ),我总是将其放在 request.getAttribute()
的第一个实例之前> 在 JSP 页面中,例如
request.setCharacterEncoding("UTF-8");
personName = request.getAttribute("personName");
但我不知道如何解决这个问题。
我的 web.xml
使用 servlet 2.5,我认为它是 JSP 2.1(我知道 JSP 1.x 不支持 UTF-8,但我认为 JSP 2.1不支持 UTF-8)。我尝试升级 web.xml
文件以从
<?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">
但这只会导致 GlassFish 以
开头的严重错误[#|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.|#]
每当我进行更改时,我都会确保重新启动 GlassFish 服务器。我假设 GlassFish 自动检测 glassfish-web.xml
是否存在,但如果我需要在某处配置它以使 GlassFish 意识到此文件存在,请告诉我。
我遵循了所有可以在网上找到的建议。需要一些帮助来解决这个问题。非常感谢任何建议。
更新 1
我注意到,如果我从 JSP 页面中删除 request.setCharacterEncoding("UTF-8");
,那么下面的
request.setCharacterEncoding("UTF-8");
personName = request.getAttribute("personName");
变成了
personName = request.getAttribute("personName");
警告消失了。这是否意味着 request.setCharacterEncoding("UTF-8");
应该只在发出 request.getParameter()
之前出现在 Java servlet 中,而不应该出现在有 JSP 页面吗?
更新 2
我仍然在 GlassFish server.log 文件中看到编码警告,尽管这次它不是来 self 的 Web 应用程序:
[#|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|#]
不确定这是从哪里来的,也不知道如何修复,但我将通过在 GlassFish 管理控制台 -Dfile.encoding=UTF8
中添加选项来修改 GlassFish JVM 编码:Configurations>server-config>JVM Settings>JVM Options
,然后重启服务器。
我还添加了此处显示的字符集过滤器:How to get UTF-8 working in Java webapps? .尽管它是为 Tomcat 制作的,但我希望它仍然适用于 GlassFish。
最佳答案
解决方案: 创建/编辑文件 glassfish-web.xml(文件夹 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>
关于java - JSP:无法弄清楚如何为 GlassFish 3.1.2 响应设置 UTF-8,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26791888/