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The problem of json transmission data garbled in java

Dec 30, 2019 am 09:24 AM
java json Garbled characters

The problem of json transmission data garbled in java

Solution to the garbled problem of json transmission data in java: (Recommended: java video tutorial)

1. Perform ISO-8859 on the parameters first -1 encoding, and then decoding with utf-8

    @RequestMapping(method=RequestMethod.GET)
    @ResponseBody
    public ResponseEntity<ResultModel> searchBorrows(String borrow_name) 
    throws UnsupportedEncodingException{
           //解決亂碼問題
         System.out.println("編碼前===:"+borrow_name);//亂碼
         String borrowName=new String(borrow_name.getBytes("ISO-8859-1"),"utf-8");
         System.out.println("編碼后:========="+borrowName);//正常

2. If it is a general request (non-ajax json** request garbled**, configure the Chinese filter directly in web.xml) as follows:

<filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern><!-- 對請求項目下所有資源進行過濾-->
    </filter-mapping>

When springmvc is not used, you can also add this sentence to solve the garbled problem of post requests: request.setCharacterEncoding("UTF-8");
Note: tomcat8 has solved the garbled problem of get requests. Yes, tomcat7 still needs to solve it by itself

3. The json data of ajax is garbled

Sometimes asynchronous requests are needed in the project, which can be implemented in the annotations in the springmvc configuration file Just add two converters to the adapter and mapper tags, which can solve the problem of garbled characters in json data requests and responses (if the tomcat encoding has not been changed, there will still be garbled characters, and all garbled characters are caused by many factors).

The following is to configure the two json converters in spinngmvc to solve the problem of json data request and response garbled characters.

<!-- 注解的適配器和映射器 -->
    <mvc:annotation-driven>
        <mvc:message-converters>
            <!--@ResponseBody 中文響應亂碼 -->
            <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>
                            application/json;charset=UTF-8
                        </value>
                        <value>
                            application/x-www-form-urlencoded;charset=UTF-8                     
                        </value>
                    </list>
                </property>
            </bean>


<!-- JSON中文請求亂碼及解決 
HttpMediaTypeNotAcceptableException: Could not find acceptable representation  異常信息-->
            <bean id="jacksonMessageConverter"
                class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>
                            application/json;charset=UTF-8
                        </value>
                        <value>
                            application/x-www-form-urlencoded;charset=UTF-8                     
                        </value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

For more java knowledge, please pay attention to the java basic tutorial column.

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