1) RequestMapping
@Controller @RequestMapping(value = "/just") public class TestController { @ResponseBody @RequestMapping(value = "/test", method = {RequestMethod.GET}) public String test() { return "中文"; } }
2) 配置
<mvc:annotation-driven conversion-service="conversion-service" validator="validator"> <mvc:message-converters register-defaults="false"> <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter" /> <bean class="org.springframework.http.converter.FormHttpMessageConverter" /> <bean class="org.springframework.http.converter.xml.SourceHttpMessageConverter" /> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" /> <bean class="org.springframework.http.converter.StringHttpMessageConverter" /> </mvc:message-converters> </mvc:annotation-driven>
3) 原因是org.springframework.http.converter.StringHttpMessageConverter类默认编码是IOS-8859-1
自己定义一个HttpMessageConverter<String>的实现类即可解决问题。
public class UTF8StringHttpMessageConverter extends AbstractHttpMessageConverter<String> { public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8"); private final List<Charset> availableCharsets; private boolean writeAcceptCharset = true; public UTF8StringHttpMessageConverter() { super(new MediaType("text", "plain", DEFAULT_CHARSET), MediaType.ALL); this.availableCharsets = new ArrayList<Charset>(Charset.availableCharsets().values()); } public void setWriteAcceptCharset(boolean writeAcceptCharset) { this.writeAcceptCharset = writeAcceptCharset; } @Override public boolean supports(Class<?> clazz) { return String.class.equals(clazz); } @Override protected String readInternal(@SuppressWarnings("rawtypes") Class clazz, HttpInputMessage inputMessage) throws IOException { Charset charset = getContentTypeCharset(inputMessage.getHeaders().getContentType()); return FileCopyUtils.copyToString(new InputStreamReader(inputMessage.getBody(), charset)); } @Override protected Long getContentLength(String s, MediaType contentType) { Charset charset = getContentTypeCharset(contentType); try { return (long) s.getBytes(charset.name()).length; } catch (UnsupportedEncodingException ex) { throw new InternalError(ex.getMessage()); } } @Override protected void writeInternal(String s, HttpOutputMessage outputMessage) throws IOException { if (writeAcceptCharset) { outputMessage.getHeaders().setAcceptCharset(getAcceptedCharsets()); } Charset charset = getContentTypeCharset(outputMessage.getHeaders().getContentType()); FileCopyUtils.copy(s, new OutputStreamWriter(outputMessage.getBody(), charset)); } protected List<Charset> getAcceptedCharsets() { return this.availableCharsets; } private Charset getContentTypeCharset(MediaType contentType) { if (contentType != null && contentType.getCharSet() != null) { return contentType.getCharSet(); } else { return DEFAULT_CHARSET; } } }
<mvc:annotation-driven conversion-service="conversion-service" validator="validator"> <mvc:message-converters register-defaults="false"> <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter" /> <bean class="org.springframework.http.converter.FormHttpMessageConverter" /> <bean class="org.springframework.http.converter.xml.SourceHttpMessageConverter" /> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" /> <bean class="my.pkg.UTF8StringHttpMessageConverter" /> </mvc:message-converters> </mvc:annotation-driven>
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2012-12-24 补充:
不用这么麻烦
<mvc:annotation-driven conversion-service="conversion-service" validator="validator"> <mvc:message-converters> <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter" /> <bean class="org.springframework.http.converter.FormHttpMessageConverter" /> <bean class="org.springframework.http.converter.xml.SourceHttpMessageConverter" /> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" /> <bean class="org.springframework.http.converter.StringHttpMessageConverter"> <constructor-arg value="UTF-8" /> </bean> </mvc:message-converters> </mvc:annotation-driven>