springboot乱码现象可以用以下方法来解决，本人是以防万一，所以都设置了。
1.jsp文件编码方式设置为UTF-8,如果新建的jsp文件，默认不是utf-8，在eclipse中，设置新建的jsp文件为utf-8
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
2.在application.properties中添加如下 spring.http.encoding.force=true spring.http.encoding.charset=UTF-8 spring.http.encoding.enabled=true server.tomcat.uri-encoding=UTF-8
3.在@RequestMapping中添加produces="application/json;charset=utf-8"，如下
@RequestMapping(value="hello",produces="application/json;charset=utf-8")
4.添加一个消息转换器
@Configuration public class CustomMVCConfiguration extends WebMvcConfigurerAdapter { @Bean public HttpMessageConverter<String> responseBodyConverter() { StringHttpMessageConverter converter = new StringHttpMessageConverter( Charset.forName("UTF-8")); return converter; } public void configureMessageConverters( List<HttpMessageConverter<?>> converters) { super.configureMessageConverters(converters); converters.add(responseBodyConverter()); } public void configureContentNegotiation( ContentNegotiationConfigurer configurer) { configurer.favorPathExtension(false); }