问题描述
- spring Boot 中文返回给浏览器乱码 解析成问号？？ fastJson jackJson
- spring boot 新增配置解决后台返回 json 到前台中文乱码之后,出现返回json数据报错：no convertter for return value of type
- 注释掉解决中文乱码的问题之后返回对象json正常
- Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableException:
No converter found for return value of type: class www.it399.com.controller.file.ResultBean
解决中文乱码的配置
@Configuration
@EnableWebMvc
@ComponentScan
public class MvcConfiguration 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);
//解决中文乱码
converters.add(responseBodyConverter());
//解决 添加解决中文乱码后 上述配置之后，返回json数据直接报错 500：no convertter for return value of type
converters.add(messageConverter());
}
}
除了上述配置之后还有添加MappingJackson2HttpMessageConverter
@Bean
public MappingJackson2HttpMessageConverter messageConverter() {
MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
converter.setObjectMapper(getObjectMapper());
return converter;
}
注意:responseBodyConverter和MappingJackson2HttpMessageConverter如果分开配置要确保前者不被覆盖，不然就会出现返回springboot返回json正常，但是返回中文乱码，或者返回中文不乱吗，但是返回对象或者json异常。
解决springboot范湖中文乱码和返回json 500错误的完整代码
/**
* spring boot 解决后台返回 json 到前台出现中文乱码的问题
* 在线助手博客 http://www.it399.com/blog/index.jsp
*/
@Configuration
@EnableWebMvc
@ComponentScan
public class MvcConfiguration extends WebMvcConfigurerAdapter {
@Bean
public HttpMessageConverter<String> responseBodyConverter(){
StringHttpMessageConverter converter = new StringHttpMessageConverter(Charset.forName("UTF-8"));
return converter;
}
@Bean
public ObjectMapper getObjectMapper() {
return new ObjectMapper();
}
@Bean
public MappingJackson2HttpMessageConverter messageConverter() {
MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
converter.setObjectMapper(getObjectMapper());
return converter;
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
super.configureMessageConverters(converters);
//解决中文乱码
converters.add(responseBodyConverter());
//解决 添加解决中文乱码后 上述配置之后，返回json数据直接报错 500：no convertter for return value of type
converters.add(messageConverter());
}
}