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本篇內(nèi)容介紹了“怎么將RestTemplate的編碼格式改為UTF-8”的有關(guān)知識(shí),在實(shí)際案例的操作過(guò)程中,不少人都會(huì)遇到這樣的困境,接下來(lái)就讓小編帶領(lǐng)大家學(xué)習(xí)一下如何處理這些情況吧!希望大家仔細(xì)閱讀,能夠?qū)W有所成!
我是在調(diào)用微信的API 的時(shí)候發(fā)現(xiàn)微信給我返回的用戶數(shù)據(jù)不能夠正常顯示昵稱,昵稱都是亂碼。
//修改RestTemplate的編碼格式為UTF-8 RestTemplate restTemplate = new RestTemplate(); List<HttpMessageConverter<?>> httpMessageConverters = restTemplate.getMessageConverters(); httpMessageConverters.stream().forEach(httpMessageConverter -> { if(httpMessageConverter instanceof StringHttpMessageConverter){ StringHttpMessageConverter messageConverter = (StringHttpMessageConverter) httpMessageConverter; messageConverter.setDefaultCharset(Charset.forName("UTF-8")); } //發(fā)送請(qǐng)求 String jsonStr = restTemplate.getForEntity(url, String.class).getBody();
上面的代碼中很簡(jiǎn)單的寫(xiě)出來(lái)了,直接自己分裝成一個(gè)方法就好。這樣就解決了中文的亂碼問(wèn)題了
restTemplate作為spring web client下的一個(gè)工具類 對(duì)http請(qǐng)求做了一層封裝,用起來(lái)也更加簡(jiǎn)潔容易,但最近遇到一個(gè)問(wèn)題就是在發(fā)送請(qǐng)求時(shí)由于請(qǐng)求中包含中文導(dǎo)致亂碼,都變成???????一堆問(wèn)號(hào),網(wǎng)上很多解決方案,但很多都比較…..
@Bean配置方法:
@Bean public RestTemplate restTemplate() { RestTemplate restTemplate = new RestTemplate(); restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8)); return restTemplate; }
applicationContext.xml配置方法:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd" default-autowire="byName" default-lazy-init="true"> <!--方式一、使用jdk的實(shí)現(xiàn)--> <bean id="ky.requestFactory" class="org.springframework.http.client.SimpleClientHttpRequestFactory"> <property name="readTimeout" value="10000"/> <property name="connectTimeout" value="5000"/> </bean> <bean id="simpleRestTemplate" class="org.springframework.web.client.RestTemplate"> <constructor-arg ref="ky.requestFactory"/> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.FormHttpMessageConverter"/> <bean class="org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter"/> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/> <bean class="org.springframework.http.converter.StringHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/plain;charset=UTF-8</value> </list> </property> </bean> </list> </property> </bean> </beans>
然后在使用的地方自動(dòng)注入就好啦~~
public RestTemplate() { this.messageConverters.add(new ByteArrayHttpMessageConverter()); this.messageConverters.add(new StringHttpMessageConverter()); this.messageConverters.add(new ResourceHttpMessageConverter()); this.messageConverters.add(new SourceHttpMessageConverter<Source>()); this.messageConverters.add(new AllEncompassingFormHttpMessageConverter()); if (romePresent) { this.messageConverters.add(new AtomFeedHttpMessageConverter()); this.messageConverters.add(new RssChannelHttpMessageConverter()); } if (jaxb2Present) { this.messageConverters.add(new Jaxb2RootElementHttpMessageConverter()); } if (jackson2Present) { this.messageConverters.add(new MappingJackson2HttpMessageConverter()); } else if (jacksonPresent) { this.messageConverters.add(new MappingJacksonHttpMessageConverter()); } }
從RestTemplate 構(gòu)造方法可以看出restTemplate默認(rèn)的messageConverters有好幾個(gè),這次的主角是StringHttpMessageConverter:
public class StringHttpMessageConverter extends AbstractHttpMessageConverter<String> { public static final Charset DEFAULT_CHARSET = Charset.forName("ISO-8859-1"); private final Charset defaultCharset; private final List<Charset> availableCharsets; private boolean writeAcceptCharset = true; /** * A default constructor that uses {@code "ISO-8859-1"} as the default charset. * @see #StringHttpMessageConverter(Charset) */ public StringHttpMessageConverter() { this(DEFAULT_CHARSET); } /** * A constructor accepting a default charset to use if the requested content * type does not specify one. */ public StringHttpMessageConverter(Charset defaultCharset) { super(new MediaType("text", "plain", defaultCharset), MediaType.ALL); this.defaultCharset = defaultCharset; this.availableCharsets = new ArrayList<Charset>(Charset.availableCharsets().values()); } /** * Indicates whether the {@code Accept-Charset} should be written to any outgoing request. * <p>Default is {@code true}. */ public void setWriteAcceptCharset(boolean writeAcceptCharset) { this.writeAcceptCharset = writeAcceptCharset; } @Override public boolean supports(Class<?> clazz) { return String.class.equals(clazz); } @Override protected String readInternal(Class<? extends String> clazz, HttpInputMessage inputMessage) throws IOException { Charset charset = getContentTypeCharset(inputMessage.getHeaders().getContentType()); return StreamUtils.copyToString(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) { // should not occur throw new IllegalStateException(ex); } } @Override protected void writeInternal(String s, HttpOutputMessage outputMessage) throws IOException { if (this.writeAcceptCharset) { outputMessage.getHeaders().setAcceptCharset(getAcceptedCharsets()); } Charset charset = getContentTypeCharset(outputMessage.getHeaders().getContentType()); StreamUtils.copy(s, charset, outputMessage.getBody()); } /** * Return the list of supported {@link Charset}. * <p>By default, returns {@link Charset#availableCharsets()}. Can be overridden in subclasses. * @return the list of accepted charsets */ protected List<Charset> getAcceptedCharsets() { return this.availableCharsets; } private Charset getContentTypeCharset(MediaType contentType) { if (contentType != null && contentType.getCharSet() != null) { return contentType.getCharSet(); } else { return this.defaultCharset; } } }
可以看到StringHttpMessageConverter默認(rèn)是ISO-8859-1編碼(有空可以看下別的MessageConverter其實(shí)都是UTF-8的)
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