用Java实现弹框(☆)

矫情吗；* 2023-02-25 03:39 3阅读 0赞

**效果图**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg1MzY2OQ_size_16_color_FFFFFF_t_70]

**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);
    	   }
            
    		 
    	
    	}

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg1MzY2OQ_size_16_color_FFFFFF_t_70_pic_center_pic_center]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg1MzY2OQ_size_16_color_FFFFFF_t_70]: /images/20230209/10fed431b91941b8a0e268f415e612e2.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg1MzY2OQ_size_16_color_FFFFFF_t_70_pic_center_pic_center]: https://img-blog.csdnimg.cn/20201102112836336.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDg1MzY2OQ==,size_16,color_FFFFFF,t_70#pic_center#pic_center