Question

我的React应用程序中的背景图片没有显示！

我已通过以下方式将其应用于index.html文件：

public class MyRedisCacheManager extends RedisCacheManager
{
    private RedisSerializer redisSerializer;

    public MyRedisCacheManager(RedisTemplate<?, ?> redisTemplate)
    {
        super( redisTemplate );

        //Create the key serializer
        Jackson2JsonRedisSerializer<Object> jKeySerializer = new Jackson2JsonRedisSerializer<>( Object.class );

        ObjectMapper keyObjectMapper = new ObjectMapper();
        keyObjectMapper.setVisibility( PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY );
        keyObjectMapper.enableDefaultTyping( ObjectMapper.DefaultTyping.NON_FINAL );

        //Set on our key serializer
        jKeySerializer.setObjectMapper( keyObjectMapper );

        //Save on the template (which is used to communicate with Redis)
        redisTemplate.setKeySerializer( jKeySerializer );
    }
}

但是，出现以下错误：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>React and Webpack4</title>
  <style type="text/css">
    body {
      background: url("background.png");
      background-size: cover;    
      height: 100%;
      width: 100%;   /* For flexibility */
    }
  </style>
</head>
<body>
  <section id="index"></section>
</body>
</html>

我的应用程序中的背景图片未显示

0 个答案: