1.如果spring返回页面乱码则在web.xml配置文件写入
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
2.如果spring返回json格式乱码 配置下面这段代码中文乱码json乱码日期乱码----好像配置了下面这个东西就不需要把json格式在转换了，可以直接返回string字符串
<!--springmvc 统一解决json中文乱码问题-->
<mvc:annotation-driven>
<mvc:message-converters register-defaults="true">
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<constructor-arg value="UTF-8"/>
</bean>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="objectMapper">
<bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">
<property name="failOnEmptyBeans" value="false"/>
</bean>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
<!-- 配置FastJson的消息转化器 —— FastJsonHttpMessageConverter -->
<mvc:annotation-driven>
<mvc:message-converters>
<!--处理中文乱码-->
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
<bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
<!--处理中文乱码-->
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
<value>application/json</value>
</list>
</property>
<property name="features">
<list>
<!-- Date的日期转换器 -->
<value>WriteDateUseDateFormat</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
然后编写一个类然后使controller继承这个类就可以解决日期保存报错400的问题了
原文：https://www.cnblogs.com/lizehong/p/14253037.html