SpringMVC模块数据绑定详细介绍

一时失言乱红尘 2023-06-26 12:20 26阅读 0赞

SpringMVC模块数据是怎样绑定的？

在数据绑定过程中,Spring MVC框架会通过数据绑定组件（DataBinder）将请求参数串的内容进行类型转换,然后将转换后的值赋给控制器类中方法的形参,这样后台方法就可以正确绑定并获取客户端请求携带的参数了。接下来,将通过一张数据流程图来介绍数据绑定的过程。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70]  
数据绑定分类：  
根据客户端请求参数类型和个数的不同,我们将Spring MVC中的数据绑定主要分为简单数据绑定和复杂数据绑定,接下来的几个小节中,就对这两种类型数据绑定进行详细讲解。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 1]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 4]  
**绑定POJO类型**  
![加粗样式][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 5]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 6]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 7]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 8]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 9]  
**自定义数据绑定**  
一般情况下,使用基本数据类型和POJO类型的参数数据已经能够满足需求,然而有些特殊类型的参数是无法在后台进行直接转换的,但也有特殊数据类型无法直接进行数据绑定,必须先经过数据转换,例如日期数据。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 10]  
**复杂的数据绑定**  
![在这里插入图片描述][20200101173910624.png]  
**数组的绑定**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 11]  
**集合的绑定**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3pfc3N5eQ_size_16_color_FFFFFF_t_70 12]

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