Solution to garbled value transfer in java

When doing JavaWeb, you will always encounter the problem of garbled Chinese value transmission from time to time. After you change all "ISO-8859-1" to "UTF-8", you still find that the problem still exists It's of no use. So I found a method that works all the time (at least for now), which is to force conversion to "UTF-8" encoding. Look at the code:

@RequestMapping("/success.html")
public String success(String userCode, Model model) {
    try {
        // 编码转换，防止中文乱码
        userCode = new String(userCode.getBytes("ISO-8859-1"), "UTF-8");
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    log.info("userCode:" + userCode);
    model.addAttribute("userCode", userCode);
    return "success";
}

Another way is to add an encoding filter to the configuration web.xml file, which can also achieve Chinese value transmission without garbled characters.

<!-- 编码过滤器 -->
<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>
</filter-mapping>

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