java - java应用程序从Windows迁移到Linux服务器

Question

我正在尝试将包含一些图表的 java 应用程序从 Windows 迁移到 Linux，但出现以下异常:

    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)

我还尝试通过 Putty 设置显示环境变量，但这也不起作用。
谁能告诉我问题到底出在哪里？
是在应用程序端还是linux端？

Answer 1

您需要以某种方式设置 System.setProperty("java.awt.headless", "true");

告诉服务器团队使用附加命令行参数启动他们正在启动的任何 Java

java -Djava.awt.headless=true