下面列出了怎么用org.springframework.http.converter.ResourceHttpMessageConverter的API类实例代码及写法，或者点击链接到github查看源代码。
@Before
public void setup() {
ByteArrayHttpMessageConverter emptyBodyConverter = new ByteArrayHttpMessageConverter();
emptyBodyConverter.setSupportedMediaTypes(Collections.singletonList(MediaType.APPLICATION_JSON));
List<HttpMessageConverter<?>> converters = new ArrayList<>(3);
converters.add(emptyBodyConverter);
converters.add(new ByteArrayHttpMessageConverter());
converters.add(new ResourceHttpMessageConverter());
converters.add(new MappingJackson2HttpMessageConverter());
AllEncompassingFormHttpMessageConverter converter = new AllEncompassingFormHttpMessageConverter();
converter.setPartConverters(converters);
restTemplate = new RestTemplate(new HttpComponentsClientHttpRequestFactory());
restTemplate.setMessageConverters(Collections.singletonList(converter));
}
@Test
public void handleReturnValueImage() throws Exception {
this.servletRequest.addHeader("Accept", "*/*");
Method method = getClass().getDeclaredMethod("getImage");
MethodParameter returnType = new MethodParameter(method, -1);
List<HttpMessageConverter<?>> converters = new ArrayList<>();
converters.add(new ResourceHttpMessageConverter());
RequestResponseBodyMethodProcessor processor = new RequestResponseBodyMethodProcessor(converters);
ClassPathResource resource = new ClassPathResource("logo.jpg", getClass());
processor.writeWithMessageConverters(resource, returnType, this.request);
assertEquals("image/jpeg", this.servletResponse.getHeader("Content-Type"));
}
@SuppressWarnings("unchecked")
private void verifyMessageConverters(Object bean, boolean hasDefaultRegistrations) {
assertNotNull(bean);
Object value = new DirectFieldAccessor(bean).getPropertyValue("messageConverters");
assertNotNull(value);
assertTrue(value instanceof List);
List<HttpMessageConverter<?>> converters = (List<HttpMessageConverter<?>>) value;
if (hasDefaultRegistrations) {
assertTrue("Default and custom converter expected", converters.size() > 2);
}
else {
assertTrue("Only custom converters expected", converters.size() == 2);
}
assertTrue(converters.get(0) instanceof StringHttpMessageConverter);
assertTrue(converters.get(1) instanceof ResourceHttpMessageConverter);
}
@Before
public void setup() {
ByteArrayHttpMessageConverter emptyBodyConverter = new ByteArrayHttpMessageConverter();
emptyBodyConverter.setSupportedMediaTypes(Collections.singletonList(MediaType.APPLICATION_JSON));
List<HttpMessageConverter<?>> converters = new ArrayList<>(3);
converters.add(emptyBodyConverter);
converters.add(new ByteArrayHttpMessageConverter());
converters.add(new ResourceHttpMessageConverter());
converters.add(new MappingJackson2HttpMessageConverter());
AllEncompassingFormHttpMessageConverter converter = new AllEncompassingFormHttpMessageConverter();
converter.setPartConverters(converters);
restTemplate = new RestTemplate(new HttpComponentsClientHttpRequestFactory());
restTemplate.setMessageConverters(Collections.singletonList(converter));
}
@Test
public void handleReturnValueImage() throws Exception {
this.servletRequest.addHeader("Accept", "*/*");
Method method = getClass().getDeclaredMethod("getImage");
MethodParameter returnType = new MethodParameter(method, -1);
List<HttpMessageConverter<?>> converters = new ArrayList<>();
converters.add(new ResourceHttpMessageConverter());
RequestResponseBodyMethodProcessor processor = new RequestResponseBodyMethodProcessor(converters);
ClassPathResource resource = new ClassPathResource("logo.jpg", getClass());
processor.writeWithMessageConverters(resource, returnType, this.request);
assertEquals("image/jpeg", this.servletResponse.getHeader("Content-Type"));
}
@SuppressWarnings("unchecked")
private void verifyMessageConverters(Object bean, boolean hasDefaultRegistrations) {
assertNotNull(bean);
Object value = new DirectFieldAccessor(bean).getPropertyValue("messageConverters");
assertNotNull(value);
assertTrue(value instanceof List);
List<HttpMessageConverter<?>> converters = (List<HttpMessageConverter<?>>) value;
if (hasDefaultRegistrations) {
assertTrue("Default and custom converter expected", converters.size() > 2);
}
else {
assertTrue("Only custom converters expected", converters.size() == 2);
}
assertTrue(converters.get(0) instanceof StringHttpMessageConverter);
assertTrue(converters.get(1) instanceof ResourceHttpMessageConverter);
}
@Override
public void afterPropertiesSet() throws Exception {
if (logger.isWarnEnabled() && CollectionUtils.isEmpty(this.locations)) {
logger.warn("Locations list is empty. No resources will be served unless a " +
"custom ResourceResolver is configured as an alternative to PathResourceResolver.");
}
if (this.resourceResolvers.isEmpty()) {
this.resourceResolvers.add(new PathResourceResolver());
}
initAllowedLocations();
if (this.resourceHttpMessageConverter == null) {
this.resourceHttpMessageConverter = new ResourceHttpMessageConverter();
}
if (this.resourceRegionHttpMessageConverter == null) {
this.resourceRegionHttpMessageConverter = new ResourceRegionHttpMessageConverter();
}
this.contentNegotiationStrategy = initContentNegotiationStrategy();
}
@Before
public void setUp() {
ByteArrayHttpMessageConverter emptyBodyConverter = new ByteArrayHttpMessageConverter();
emptyBodyConverter.setSupportedMediaTypes(Collections.singletonList(MediaType.APPLICATION_JSON));
List<HttpMessageConverter<?>> converters = new ArrayList<>(3);
converters.add(emptyBodyConverter);
converters.add(new ByteArrayHttpMessageConverter());
converters.add(new ResourceHttpMessageConverter());
converters.add(new MappingJackson2HttpMessageConverter());
AllEncompassingFormHttpMessageConverter converter = new AllEncompassingFormHttpMessageConverter();
converter.setPartConverters(converters);
restTemplate = new RestTemplate(new HttpComponentsClientHttpRequestFactory());
restTemplate.setMessageConverters(Collections.singletonList(converter));
}
public static RestTemplate getRestTemplate() {// 手动添加
SimpleClientHttpRequestFactory requestFactory=new SimpleClientHttpRequestFactory();
requestFactory.setReadTimeout(120000);
List<HttpMessageConverter<?>> messageConverters = new LinkedList<>();
messageConverters.add(new ByteArrayHttpMessageConverter());
messageConverters.add(new StringHttpMessageConverter(StandardCharsets.UTF_8));
messageConverters.add(new ResourceHttpMessageConverter());
messageConverters.add(new SourceHttpMessageConverter<Source>());
messageConverters.add(new AllEncompassingFormHttpMessageConverter());
messageConverters.add(new MappingJackson2HttpMessageConverter());
RestTemplate restTemplate=new RestTemplate(messageConverters);
restTemplate.setRequestFactory(requestFactory);
return restTemplate;
}
@Override
public void afterPropertiesSet() throws Exception {
resolveResourceLocations();
if (logger.isWarnEnabled() && CollectionUtils.isEmpty(this.locations)) {
logger.warn("Locations list is empty. No resources will be served unless a " +
"custom ResourceResolver is configured as an alternative to PathResourceResolver.");
}
if (this.resourceResolvers.isEmpty()) {
this.resourceResolvers.add(new PathResourceResolver());
}
initAllowedLocations();
// Initialize immutable resolver and transformer chains
this.resolverChain = new DefaultResourceResolverChain(this.resourceResolvers);
this.transformerChain = new DefaultResourceTransformerChain(this.resolverChain, this.resourceTransformers);
if (this.resourceHttpMessageConverter == null) {
this.resourceHttpMessageConverter = new ResourceHttpMessageConverter();
}
if (this.resourceRegionHttpMessageConverter == null) {
this.resourceRegionHttpMessageConverter = new ResourceRegionHttpMessageConverter();
}
this.contentNegotiationStrategy = initContentNegotiationStrategy();
}
@Before
public void createContext() {
this.messageConverter = new ResourceHttpMessageConverter();
this.context = new ServerResponse.Context() {
@Override
public List<HttpMessageConverter<?>> messageConverters() {
return Collections.singletonList(messageConverter);
}
};
}
@Override
public void afterPropertiesSet() throws Exception {
resolveResourceLocations();
if (logger.isWarnEnabled() && CollectionUtils.isEmpty(this.locations)) {
logger.warn("Locations list is empty. No resources will be served unless a " +
"custom ResourceResolver is configured as an alternative to PathResourceResolver.");
}
if (this.resourceResolvers.isEmpty()) {
this.resourceResolvers.add(new PathResourceResolver());
}
initAllowedLocations();
// Initialize immutable resolver and transformer chains
this.resolverChain = new DefaultResourceResolverChain(this.resourceResolvers);
this.transformerChain = new DefaultResourceTransformerChain(this.resolverChain, this.resourceTransformers);
if (this.resourceHttpMessageConverter == null) {
this.resourceHttpMessageConverter = new ResourceHttpMessageConverter();
}
if (this.resourceRegionHttpMessageConverter == null) {
this.resourceRegionHttpMessageConverter = new ResourceRegionHttpMessageConverter();
}
this.contentNegotiationStrategy = initContentNegotiationStrategy();
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
converters.add(new StringHttpMessageConverter());
converters.add(new FormHttpMessageConverter());
GsonHttpMessageConverter c = new GsonHttpMessageConverter();
c.setGson(new GsonBuilder().disableHtmlEscaping().create());
converters.add(c);
converters.add(new ResourceHttpMessageConverter());
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
converters.add(new StringHttpMessageConverter());
converters.add(new FormHttpMessageConverter());
GsonHttpMessageConverter c = new GsonHttpMessageConverter();
c.setGson(new GsonBuilder().disableHtmlEscaping().create());
converters.add(c);
converters.add(new ResourceHttpMessageConverter());
}
private List<HttpMessageConverter<?>> getHttpMessageConverters() {
List<HttpMessageConverter<?>> messageConverters = new ArrayList<>();
messageConverters.add(new ByteArrayHttpMessageConverter());
messageConverters.add(new StringHttpMessageConverter());
messageConverters.add(new ResourceHttpMessageConverter());
messageConverters.add(new MappingJackson2HttpMessageConverter());
return messageConverters;
}
/**
* Adds a set of default HttpMessageConverter instances to the given list.
* Subclasses can call this method from {@link #configureMessageConverters(List)}.
* @param messageConverters the list to add the default message converters to
*/
protected final void addDefaultHttpMessageConverters(List<HttpMessageConverter<?>> messageConverters) {
StringHttpMessageConverter stringConverter = new StringHttpMessageConverter();
stringConverter.setWriteAcceptCharset(false);
messageConverters.add(new ByteArrayHttpMessageConverter());
messageConverters.add(stringConverter);
messageConverters.add(new ResourceHttpMessageConverter());
messageConverters.add(new SourceHttpMessageConverter<Source>());
messageConverters.add(new AllEncompassingFormHttpMessageConverter());
if (romePresent) {
messageConverters.add(new AtomFeedHttpMessageConverter());
messageConverters.add(new RssChannelHttpMessageConverter());
}
if (jackson2XmlPresent) {
messageConverters.add(new MappingJackson2XmlHttpMessageConverter(
Jackson2ObjectMapperBuilder.xml().applicationContext(this.applicationContext).build()));
}
else if (jaxb2Present) {
messageConverters.add(new Jaxb2RootElementHttpMessageConverter());
}
if (jackson2Present) {
messageConverters.add(new MappingJackson2HttpMessageConverter(
Jackson2ObjectMapperBuilder.json().applicationContext(this.applicationContext).build()));
}
else if (gsonPresent) {
messageConverters.add(new GsonHttpMessageConverter());
}
}
/**
* Create a new instance of the {@link RestTemplate} using default settings.
* Default {@link HttpMessageConverter}s are initialized.
*/
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 (jackson2XmlPresent) {
this.messageConverters.add(new MappingJackson2XmlHttpMessageConverter());
}
else if (jaxb2Present) {
this.messageConverters.add(new Jaxb2RootElementHttpMessageConverter());
}
if (jackson2Present) {
this.messageConverters.add(new MappingJackson2HttpMessageConverter());
}
else if (gsonPresent) {
this.messageConverters.add(new GsonHttpMessageConverter());
}
}
@Bean
public ResourceHttpMessageConverter resourceHttpMessageConverter(){
ResourceHttpMessageConverter res = new ResourceHttpMessageConverter();
List<MediaType> mediaTypes = new LinkedList<MediaType>();
mediaTypes.add(MediaType.APPLICATION_JSON);
mediaTypes.add(MediaType.APPLICATION_OCTET_STREAM);
mediaTypes.add(MediaType.IMAGE_JPEG);
mediaTypes.add(MediaType.IMAGE_PNG);
mediaTypes.add(MediaType.IMAGE_GIF);
mediaTypes.add(MediaType.TEXT_PLAIN);
res.setSupportedMediaTypes(mediaTypes);
return res;
}
@Test
public void handleReturnValueImage() throws Exception {
this.servletRequest.addHeader("Accept", "*/*");
Method method = getClass().getDeclaredMethod("getImage");
MethodParameter returnType = new MethodParameter(method, -1);
List<HttpMessageConverter<?>> converters = Collections.singletonList(new ResourceHttpMessageConverter());
RequestResponseBodyMethodProcessor processor = new RequestResponseBodyMethodProcessor(converters);
ClassPathResource resource = new ClassPathResource("logo.jpg", getClass());
processor.writeWithMessageConverters(resource, returnType, this.webRequest);
assertEquals("image/jpeg", this.servletResponse.getHeader("Content-Type"));
}
@SuppressWarnings("unchecked")
private void verifyMessageConverters(Object bean, boolean hasDefaultRegistrations) {
assertNotNull(bean);
Object value = new DirectFieldAccessor(bean).getPropertyValue("messageConverters");
assertNotNull(value);
assertTrue(value instanceof List);
List<HttpMessageConverter<?>> converters = (List<HttpMessageConverter<?>>) value;
if (hasDefaultRegistrations) {
assertTrue("Default converters are registered in addition to custom ones", converters.size() > 2);
} else {
assertTrue("Default converters should not be registered", converters.size() == 2);
}
assertTrue(converters.get(0) instanceof StringHttpMessageConverter);
assertTrue(converters.get(1) instanceof ResourceHttpMessageConverter);
}
/**
* Create a new instance of the {@link RestTemplate} using default settings.
* Default {@link HttpMessageConverter}s are initialized.
*/
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 (jackson2XmlPresent) {
this.messageConverters.add(new MappingJackson2XmlHttpMessageConverter());
}
else if (jaxb2Present) {
this.messageConverters.add(new Jaxb2RootElementHttpMessageConverter());
}
if (jackson2Present) {
this.messageConverters.add(new MappingJackson2HttpMessageConverter());
}
else if (gsonPresent) {
this.messageConverters.add(new GsonHttpMessageConverter());
}
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
converters.add(new ResourceHttpMessageConverter());
GsonHttpMessageConverter converter = new GsonHttpMessageConverter();
converter.setGson(gson());
converters.add(converter);
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
StringHttpMessageConverter stringConverter = new StringHttpMessageConverter(Charset.forName("UTF-8"));
stringConverter.setWriteAcceptCharset(false);
converters.add(new ByteArrayHttpMessageConverter());
converters.add(stringConverter);
converters.add(new ResourceHttpMessageConverter());
converters.add(new SourceHttpMessageConverter<Source>());
converters.add(new AllEncompassingFormHttpMessageConverter());
}
@Bean
public HttpMessageConverters messageConverters(ObjectMapper objectMapper) {
return new HttpMessageConverters(
// Prevent default converters
false,
Arrays.<HttpMessageConverter<?>>asList(new MappingJackson2HttpMessageConverter(objectMapper),
new ResourceHttpMessageConverter()));
}
public FormHttpMessageConverter() {
this.supportedMediaTypes.add(MediaType.APPLICATION_FORM_URLENCODED);
this.supportedMediaTypes.add(MediaType.MULTIPART_FORM_DATA);
StringHttpMessageConverter stringHttpMessageConverter = new StringHttpMessageConverter();
stringHttpMessageConverter.setWriteAcceptCharset(false); // see SPR-7316
this.partConverters.add(new ByteArrayHttpMessageConverter());
this.partConverters.add(stringHttpMessageConverter);
this.partConverters.add(new ResourceHttpMessageConverter());
applyDefaultCharset();
}
@Override
protected void configureMessageConverters(final List<HttpMessageConverter<?>> converters) {
final StringHttpMessageConverter stringConverter = new StringHttpMessageConverter();
stringConverter.setWriteAcceptCharset(false);
converters.add(new ByteArrayHttpMessageConverter());
converters.add(stringConverter);
converters.add(new ResourceHttpMessageConverter());
converters.add(new SourceHttpMessageConverter<>());
converters.add(mappingJackson2HttpMessageConverter());
super.configureMessageConverters(converters);
}
@PostConstruct
public void init() {
restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new StringHttpMessageConverter());
restTemplate.getMessageConverters().add(new FormHttpMessageConverter());
restTemplate.getMessageConverters().add(new ResourceHttpMessageConverter());
requestConfig = RequestConfig.custom().setSocketTimeout(TIME_OUT).setConnectTimeout(TIME_OUT).build();
}
private static RestTemplate createRestTemplate() {
List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
messageConverters.add(new ByteArrayHttpMessageConverter());
messageConverters.add(new StringHttpMessageConverter(Charset.forName("UTF-8")));
messageConverters.add(new ResourceHttpMessageConverter());
messageConverters.add(new SourceHttpMessageConverter<Source>());
messageConverters.add(new AllEncompassingFormHttpMessageConverter());
messageConverters.add(new Jaxb2RootElementHttpMessageConverter());
messageConverters.add(new MappingJackson2HttpMessageConverter());
return new RestTemplate(messageConverters);
}
private List<HttpMessageConverter<?>> getHttpMessageConverters() {
List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
messageConverters.add(new ByteArrayHttpMessageConverter());
messageConverters.add(new StringHttpMessageConverter());
messageConverters.add(new ResourceHttpMessageConverter());
messageConverters.add(new UploadApplicationPayloadHttpMessageConverter());
messageConverters.add(getFormHttpMessageConverter());
messageConverters.add(new MappingJacksonHttpMessageConverter());
return messageConverters;
}
private List<HttpMessageConverter<?>> getFormPartsMessageConverters() {
List<HttpMessageConverter<?>> partConverters = new ArrayList<HttpMessageConverter<?>>();
StringHttpMessageConverter stringConverter = new StringHttpMessageConverter();
stringConverter.setSupportedMediaTypes(Collections.singletonList(JsonUtil.JSON_MEDIA_TYPE));
stringConverter.setWriteAcceptCharset(false);
partConverters.add(stringConverter);
partConverters.add(new ResourceHttpMessageConverter());
partConverters.add(new UploadApplicationPayloadHttpMessageConverter());
return partConverters;
}