Question

我有一个使用java.awt.swing代码的java项目，但是当程序到达使用代码的函数时，它会出现以下错误：

X11 connection rejected because of wrong authentication

在catalina.out logfile

中输出以下内容

SEVERE: Servlet.service() for servlet [program$Servlet] in context with path [/picture] threw exception [com.vaadin.server.ServiceException: java.lang.InternalError: Can't connect to X11 window server using 'localhost:11.0' as the value of the DISPLAY variable.] with root cause
java.lang.InternalError: Can't connect to X11 window server using 'localhost:11.0' as the value of the DISPLAY variable.

根据this site上的论坛帖子，如果您想使用任何AWT或Swing组件，则需要以无头模式运行JVM。我通过执行this site中的以下代码尝试了这一点：

CATALINA_OPTS="-server -Djava.awt.headless=true"

但是，问题仍然存在且X11Forwarding已启用

我是否想在tomcat启动时想要使用java.awt.headless这个错误的方向，还是真的要走的路？操作系统是红帽企业Linux服务器版本6.7

为了完整性：使用swing的代码，我想在图像上绘制String username的内容

public File generatePhoto(String username) throws NamingException { 
    BufferedImage noImg = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
    Graphics2D g2d = noImg.createGraphics();
    Font font = new Font("Arial", Font.PLAIN, 48);
    g2d.setFont(font);
    g2d.setPaint(Color.red);
    FontMetrics fm = g2d.getFontMetrics();
    g2d.dispose();

    noImg = new BufferedImage(180, 180, BufferedImage.TYPE_INT_ARGB);
    g2d = noImg.createGraphics();
    g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
    g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
    g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
    g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
    g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
    g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
    g2d.setFont(font);

    fm = g2d.getFontMetrics();
    g2d.setColor(Color.WHITE);
    g2d.drawString(username, 60, 100);
    g2d.dispose();
    try {
        ImageIO.write(noImg, "jpg", new File(tmp_dir + "/noimg" + username + ".jpg"));
    } catch (IOException ex) {
        ex.printStackTrace();
    }

    File outputfilenoImg = new File(tmp_dir + "/noimg" + username + ".jpg");
    System.out.println("location of no image: " + outputfilenoImg.toString()) ;

    return outputfilenoImg ;

}

我尝试过的其他解决方案

static { /* works fine! ! */
      System.setProperty("java.awt.headless", "true");
      System.out.println("Headless?" + java.awt.GraphicsEnvironment.isHeadless());
      /* ---> prints true */
    }

打印错误

        protected void init(VaadinRequest request) 
        {
            System.setProperty("java.awt.headless", "true");
            System.out.println("Headless?" + java.awt.GraphicsEnvironment.isHeadless());
...
}

打印错误

Answer 1

经过一番搜索，我找到了解决方案：

vi ../bin/setenv.sh

使用..作为tomcat的位置并添加以下代码

JAVA_OPTS="$JAVA_OPTS -Dopenam.agents.bootstrap.dir=/oam/tomcat-xtrapps/j2ee_agents/tomcat_v6_agent/Agent_002/config" 

export JAVA_OPTS="$JAVA_OPTS\
 -server\
 -Djava.awt.headless=true\

第一行已经存在，其余部分由我添加

由于认证tomcat错误，X11连接被拒绝

1 个答案: