Tomcat不显示验证码

你的名字 2022-02-18 10:04 295阅读 0赞

1.错误出现java.lang.NoClassDefFoundError: sun/awt/X11GraphicsEnvironment异常

异常信息如下：

Caused by: java.lang.NoClassDefFoundError: sun/awt/X11GraphicsEnvironment
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:169)
    at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
    at sun.font.FontManager.initSGEnv(FontManager.java:1094)
    at sun.font.FontManager.findFont2D(FontManager.java:1756)
    at java.awt.Font.getFont2D(Font.java:452)
    at java.awt.Font.canDisplay(Font.java:1835)
    at java.awt.Font.canDisplayUpTo(Font.java:1901)
    at java.awt.font.TextLayout.singleFont(TextLayout.java:451)
    at java.awt.font.TextLayout.(TextLayout.java:509)
    at com.ai.mapp.service.table.utils.ReportExportExcel.exportExcel(ReportExportExcel.java:70)
    at com.ai.mapp.action.business.ReportDataAction.expReportExcel(ReportDataAction.java:362)
    ... 56 more

解决方案：

在tomcat配置文件catalina.sh文件中添加 CATALINA_OPTS="-Djava.awt.headless=true"

catalina.sh添加之后如下：

#                   of the catalina startup java process, when start (fork) is
    #                   used
    #
    #   LOGGING_CONFIG  (Optional) Override Tomcat's logging config file
    #                   Example (all one line)
    #                   LOGGING_CONFIG="-Djava.util.logging.config.file=$CATALINA_BASE/conf/logging.properties"
    #
    #   LOGGING_MANAGER (Optional) Override Tomcat's logging manager
    #                   Example (all one line)
    #                   LOGGING_MANAGER="-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager"
    # -----------------------------------------------------------------------------
    CATALINA_OPTS="-Djava.awt.headless=true"
    # OS specific support.  $var _must_ be set to either true or false.
    cygwin=false
    darwin=false
    os400=false
    case "`uname`" in
    CYGWIN*) cygwin=true;;
    Darwin*) darwin=true;;
    OS400*) os400=true;;
    esac
    # resolve links - $0 may be a softlink
    PRG="$0"
    while [ -h "$PRG" ]; do
      ls=`ls -ld "$PRG"`
      link=`expr "$ls" : '.*-> $.*$$'`
      if expr "$link" : '/.*' > /dev/null; then
        PRG="$link"
      else
        PRG=`dirname "$PRG"`/"$link"
      fi
    done

重启Tomcat即可