Java系统公告弹窗实现-优快云博客

效果图
在这里插入图片描述

代码：

@RequestMapping(value="getMessage",method=RequestMethod.POST)
	@ResponseBody
	public void getMessage(Long id ){

		List<SystemNotice> systemList=userService.selAllSystemNotic();
		
	    JFrame frame = new JFrame("系统公告");
	    frame.setAlwaysOnTop(true);
	    frame.setSize(1000,800 );
	    frame.setLocationRelativeTo(null);
        
        JPanel panel = new JPanel();
        panel.setLayout(null);
        
        String temStr="";
        int i=1;
        if(systemList.size()>0) {
        	for(SystemNotice sys:systemList) {
        	
        		temStr=temStr+"<big>"+i+"、"+sys.getContent()+"</big><br>";
           		 i++;
        		
        	}
        }
      
        temStr="<html>"+temStr+"</html>";
       
	    JLabel jlable=new JLabel(temStr);
	
	  jlable.setFont(new Font("楷体", Font.BOLD, 13));
	  jlable.setHorizontalAlignment(SwingConstants.CENTER);
	  jlable.setBounds(50, 50, 900, 700);
	  jlable.setVerticalAlignment(SwingConstants.CENTER);
	  panel.add(jlable);
	  
	  
	  JButton button = new JButton("已知悉");
	  button.setBounds(450, 710, 85, 35);
	
	  button.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent e) {
        	  userService.updateAlertTag(id);
        	  frame.dispose();
        	  
        	 
          }
      });
	 
	  panel.add(button);
	  frame.add(panel);
	 
        // 显示窗口
	   if(systemList.size()>0) {
		   frame.setVisible(true);
	   }
        
		 
	
	}