我想将我的 log4j.xml 与 log4j.xsd(xml 架构)连接起来。项目没有任何警告或错误。但是当我启动它时，我有这样的控制台警告:

log4j:WARN 可继续解析错误 6 和第 66 列。

log4j:WARN 文档根元素“log4j:configuration”，必须匹配 DOCTYPE 根“null”。

log4j:WARN 可继续解析错误 6 和第 66 列。

log4j:WARN 文档无效:找不到语法。

我认为，模式位置有问题。但是不知道，怎么写才正常。 希望得到您的指点。

我的 log4j.xml:

  <?xml version="1.0" encoding="UTF-8" ?>

   <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    debug="false"
    xsi:schemaLocation="http://www.example.org/log4j log4j.xsd ">

<appender name="logFileAppender" class="org.apache.log4j.RollingFileAppender">
        <param name="File" value="E:/Codes/HorseRacing/logFile.log"/>
        <param name="MaxFileSize" value="1MB"/>
        <param name="MaxBackupIndex" value="5"/>
        <param name="Encoding" value="UTF-8"/>
        <layout class="org.apache.log4j.EnhancedPatternLayout">
        <param name="ConversionPattern" value="%d{ISO8601} [%-5p][%-16.16t][%40.40c] - %m%n"/>
        </layout>
    </appender>

     <appender name="ConsoleAppender" class="org.apache.log4j.ConsoleAppender">
        <param name="Encoding" value="Cp866"/>
        <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern" value="%d{ISO8601} [%-5p][%-25.25l][%10.10c] - %m%n" />
        </layout>
    </appender>

   <logger name="appLogger">
        <level value="INFO"/>
        <appender-ref ref="logFileAppender"/>
        <appender-ref ref="ConsoleAppender"/>
    </logger>

</log4j:configuration>

还有我的 log4j.xsd:

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema attributeFormDefault="unqualified"
    elementFormDefault="qualified" version="1.0"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <xsd:element name="configuration">
   <xsd:complexType>
      <xsd:sequence>
        <xsd:element maxOccurs="unbounded" name="appender">
          <xsd:complexType>
            <xsd:sequence>
              <xsd:element maxOccurs="unbounded" name="param">
                <xsd:complexType>
                  <xsd:attribute name="name" type="xsd:string" />
                  <xsd:attribute name="value" type="xsd:string" />
                </xsd:complexType>
              </xsd:element>
              <xsd:element name="layout">
            <xsd:complexType>
              <xsd:sequence>
                <xsd:element name="param">
                  <xsd:complexType>
                    <xsd:attribute name="name" type="xsd:string" />
                    <xsd:attribute name="value" type="xsd:string" />
                  </xsd:complexType>
                </xsd:element>
              </xsd:sequence>
              <xsd:attribute name="class" type="xsd:string" />
            </xsd:complexType>
          </xsd:element>
        </xsd:sequence>
        <xsd:attribute name="name" type="xsd:string" />
        <xsd:attribute name="class" type="xsd:string" />
      </xsd:complexType>
    </xsd:element>
    <xsd:element name="logger">
      <xsd:complexType>
        <xsd:sequence>
          <xsd:element name="level">
            <xsd:complexType>
              <xsd:attribute name="value" type="xsd:string" />
            </xsd:complexType>
          </xsd:element>
          <xsd:element maxOccurs="unbounded" name="appender-ref">
               <xsd:complexType>
                <xsd:attribute name="ref" type="xsd:string" />
               </xsd:complexType>
             </xsd:element>
           </xsd:sequence>
          <xsd:attribute name="name" type="xsd:string" />
         </xsd:complexType>
       </xsd:element>
     </xsd:sequence>
     <xsd:attribute name="debug" type="xsd:boolean" />
     <xsd:attribute name="schemaLocation" type="xsd:string" />
   </xsd:complexType>
  </xsd:element>
   </xsd:schema>

   <logger name="appLogger">
    <level value="INFO"/>
    <appender-ref ref="logFileAppender"/>
    <appender-ref ref="ConsoleAppender"/>
    </logger>

    </log4j:configuration>

附言对不起我的英语...

最佳答案

在 <xml> 之后将以下行添加到您的 log4j.xml 配置文件中元素:

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

Complete log4j Configuration Example from their wiki:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
  <appender name="console" class="org.apache.log4j.ConsoleAppender"> 
    <param name="Target" value="System.out"/> 
    <layout class="org.apache.log4j.PatternLayout"> 
      <param name="ConversionPattern" value="%-5p %c{1} - %m%n"/> 
    </layout> 
  </appender> 

  <root> 
    <priority value ="debug" /> 
    <appender-ref ref="console" /> 
  </root>

</log4j:configuration>

关于xml - log4j:WARN 文档根元素 "log4j:configuration"，必须匹配 DOCTYPE 根 "null"，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11146461/