SpringMVC 错误解决

心已赠人 2023-10-10 16:49 27阅读 0赞

###### **1、SpringMVC中解决@ResponseBody注解返回中文乱码问题** ######

在@RequestMapping()注解内加上produces = “application/json;charset=utf-8”

![fb8a809852b229e0e87f4a200c2048c9.png][]

在spring处理ResponseBody时涉及到org.springframework.http.converter.StringHttpMessageConverter这个类，该类在默认实现中将defaultCharset设为ISO-8859-1。当@RequestMapping标记的方法未配置produces属性时，将自动使用默认编码；如果配置了produces属性，AbstractHttpMessageConverter中的write方法将不会受supportedMediaTypes影响，而用produce设置的header赋值给contenttype。改造一下RequestMappingHandlerAdapter的配置，springMvc.xml如下：

<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
            <property name="messageConverters">
                <list>
                    <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                        <property name="supportedMediaTypes">
                            <list>
                                <value>text/plain;charset=UTF-8</value>
                                <value>text/html;charset=UTF-8</value>
                                <value>applicaiton/javascript;charset=UTF-8</value>
                            </list>
                        </property>
                    </bean>
                </list>
            </property>
        </bean>

原文参考：[(3条消息) SpringMVC解决@ResponseBody注解返回中文乱码\_@restbody返回不是中文\_c.的博客-CSDN博客][3_ SpringMVC_ResponseBody_restbody_c._-CSDN]

###### **2、解决response中文乱码，通知浏览器服务器发送的数据格式** ######

response.setContentType("text/html;charset=utf-8”);

![4293ffcb4804dbd8d6c607e2dc2b1691.png][]

原文链接：[(3条消息) SpringMVC中解决@ResponseBody注解返回中文乱码问题\_@responsebody 乱码\_一234567博的博客-CSDN博客][3_ SpringMVC_ResponseBody_responsebody _234567_-CSDN]

###### **3、找不到类错误**： ######

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.http.converter.cbor.MappingJackson2CborHttpMessageConverter\#4b8c8349' defined in class path resource \[spring-mvc.xml\]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate \[org.springframework.http.converter.cbor.MappingJackson2CborHttpMessageConverter\]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/dataformat/cbor/CBORFactory

![29e5c541fc85904f99027fdbe23fd9ca.png][]

解决办法：

在spring-mvc.xml配置文件中，将上图圈起来的类org.springframework.http.converter.cbor.MappingJackson2CborHttpMessageConverter换成org.springframework.http.converter.json.MappingJackson2HttpMessageConverter即可

原文链接：[https://blog.csdn.net/junR\_980218/article/details/124328479][https_blog.csdn.net_junR_980218_article_details_124328479]

###### **4、jsp页面get请求和post请求中文乱码问题** ######

tomcat8.5以后版本， get请求方式，request对象使用的字符集默认为utf-8 ， post请求方式，request对象使用的编码方式为ISO8859-1。

所以new String(str.getBytes("ISO-8859-1"), charset);出现本来是utf-8编码，用ISO-8859-1取导致乱码。

[fb8a809852b229e0e87f4a200c2048c9.png]: https://img-blog.csdnimg.cn/img_convert/fb8a809852b229e0e87f4a200c2048c9.png
[3_ SpringMVC_ResponseBody_restbody_c._-CSDN]: https://blog.csdn.net/cckevincyh/article/details/81227864
[4293ffcb4804dbd8d6c607e2dc2b1691.png]: https://img-blog.csdnimg.cn/img_convert/4293ffcb4804dbd8d6c607e2dc2b1691.png
[3_ SpringMVC_ResponseBody_responsebody _234567_-CSDN]: https://blog.csdn.net/yi234567bo/article/details/121972764
[29e5c541fc85904f99027fdbe23fd9ca.png]: https://img-blog.csdnimg.cn/img_convert/29e5c541fc85904f99027fdbe23fd9ca.png
[https_blog.csdn.net_junR_980218_article_details_124328479]: https://blog.csdn.net/junR_980218/article/details/124328479