Question

我正在尝试迁移一个java应用程序，该应用程序包含一些从Windows到Linux的图形图表，但我得到了以下异常：

    java.awt.HeadlessException:
    No X11 DISPLAY variable was set, but this program performed an operation which requires it.
    at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
    at java.awt.Window.<init>(Window.java:432)
    at java.awt.Frame.<init>(Frame.java:403)
    at java.awt.Frame.<init>(Frame.java:368)
    at javachart.servlet.Bean.makeURLImage(Unknown Source)
    at javachart.applet.ParameterParser.makeURLImage(Unknown Source)
    at javachart.applet.ParameterParser.populateGc(Unknown Source)
    at javachart.applet.ParameterParser.getDatasetPropertiesFromParameters(Unknown Source)
    at javachart.applet.ParameterParser.getDatasetParameters(Unknown Source)
    at javachart.applet.ParameterParser.getDataset(Unknown Source)
    at javachart.applet.ParameterParser.getDatasets(Unknown Source)
    at javachart.applet.ParameterParser.getOptions(Unknown Source)
    at javachart.servlet.Bean.getOptions(Unknown Source)
    at javachart.servlet.labelLineApp.init(Unknown Source)
    at javachart.servlet.Bean.buildChart(Unknown Source)
    at javachart.servlet.Bean.generate(Unknown Source)
    at javachart.servlet.Bean.getFileName(Unknown Source)
    at org.apache.jsp.www.SaveHtml.chartByHotelSNS_jsp._jspService(chartByHotelSNS_jsp.java:676)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:322)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Thread.java:662)

我也试过通过Putty设置Display环境变量但是也没有用谁能告诉我问题到底在哪里？
它是在应用程序还是linux方面？

Answer 1

我相信，你的问题的根本原因是linux服务器没有安装X11，另一方面你运行的代码使用图形环境，或者至少你的图形输出没有正确配置。

我认为this文章在这种情况下很有用。此外，Alex K提供的链接也可以作为您问题的答案。

祝你好运！

Answer 2

你需要以某种方式设置System.setProperty（“java.awt.headless”，“true”）;

告诉服务器团队使用额外的命令行参数

启动他们开始的Java

java -Djava.awt.headless=true

Answer 3

设置以下sytem属性（如果安装了X11）：

DISPLAY=:0.0
export DISPLAY

或者启动自己的虚拟X11服务器。例如：

vncserver :1
export DISPLAY=:1

或者查看Xvfb

将Java应用程序从Windows迁移到Linux服务器

3 个答案: