Spring MVC form表单post提交出现乱码

转自：https://blog.csdn.net/yifansj/article/details/63008780

主要原因是：页面提交时，使用<contentType:utf-8/>格式，而服务端HttpMessageConverter解码时使用其它格式解码（如：ISO-8859-1）导致

解决方案：在Servlet中设置CharacterEncoding为UTF-8格式。

方法一：在Web.xml中加入Spring的字符集过滤器（已测）

[java] view plain copy

1. <filter>  
2.     <filter-name>characterEncodingFilter</filter-name>  
3.     <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
4.     <init-param>  
5.         <param-name>encoding</param-name><span style="white-space:pre;">    </span>  
6.         <param-value>UTF-8</param-value>  
7.     </init-param>  
8.     <init-param>  
9.         <param-name>forceEncoding</param-name><span style="white-space:pre;">   </span>  
10.         <param-value>true</param-value>  
11.     </init-param>  
12. </filter>  

encoding

字符集，将request字符集设置成encoding指定格式（相当于request.setCharacterEncoding）

forceEncoding

强制字符集设置，主要用来设置response字符集是否也是encoding指定格式

当设置为true时，相当于request.setCharacterEncoding + response.setCharacterEncoding

当设置为false时（默认），相当于request.setCharacterEncoding

加入后相当于在servlet中加入下面代码

[java] view plain copy

1. request.setCharacterEncoding("UTF-8");    
2. response.setCharacterEncoding("UTF-8");    

方法二：手动写Filter（未测）

对每个访问进行拦截，并执行下列代码

[java] view plain copy

1. request.setCharacterEncoding("UTF-8");    
2. response.setCharacterEncoding("UTF-8");    

方法三：设置HttpMessageConverter实现类的解码方式（未测试）

[java] view plain copy

1. <mvc:annotation-driven>    
2.     <mvc:message-converters>    
3.         <bean class="org.springframework.http.converter.StringHttpMessageConverter">    
4.             <property name="supportedMediaTypes">    
5.                 <list>    
6.                     <value>text/plain;charset=UTF-8</value>    
7.                     <value>text/html;charset=UTF-8</value>    
8.                 </list>    
9.             </property>    
10.         </bean>    
11.         <bean    
12.             class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">    
13.             <property name="supportedMediaTypes">    
14.                 <list>    
15.                     <value>application/json; charset=UTF-8</value>    
16.                     <value>application/x-www-form-urlencoded; charset=UTF-8</value>    
17.                 </list>    
18.             </property>    
19.         </bean>    
20.     </mvc:message-converters>    
21. </mvc:annotation-driven>