springboot配置字元轉換器以準備應對讀寫字元亂碼的重要問題，配置的方法如下

1、在application.properties中設定

#編碼格式 spring.http.encoding.force=true spring.http.encoding.charset=UTF-8 spring.http.encoding.enabled=true server.tomcat.uri-encoding=UTF-8

2、自己手寫編碼過濾器

//字元編碼過濾器

@WebFilter(urlPatterns = "/*",filterName = "CharacterEncodingFilter")

public class CharacterEncodingFilter implements Filter{

@Override

public void init(FilterConfig filterConfig) throws ServletException {

}

@Override

public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

HttpServletRequest request = (HttpServletRequest) servletRequest;

HttpServletResponse response = (HttpServletResponse) servletResponse;

request.setCharacterEncoding("UTF-8");

response.setCharacterEncoding("UTF-8");

filterChain.doFilter(request , response);

}

@Override

public void destroy() {

}

}

3、使用java配置寫一個字元編碼配置類

/**

* 中文亂碼解決

*/

@Configuration

public class CharsetConfig extends WebMvcConfigurerAdapter {

@Bean

public HttpMessageConverter<String> responseBodyConverter() {

StringHttpMessageConverter converter = new StringHttpMessageConverter(

Charset.forName("UTF-8"));

return converter;

}

@Override

public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {

super.configureMessageConverters(converters);

converters.add(responseBodyConverter());

}

@Override

public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {

configurer.favorPathExtension(false);

}

}

　　StringHttpMessageConverter是一個請求和響應資訊的編碼轉換器，透過原始碼我們發現預設編碼ISO-8859-1，不是UTF-8，所以我們只要透過上述配置將請求字串轉為UTF-8 即可。

WebMvcConfigurerAdapter 是springmvc的一個配置支配器類，我們可以實現我們感興趣的方法。