Spring工具类

比眉伴天荒 2022-12-27 07:30 1阅读 0赞

## 你可能用到的Spring工具类？ ##

> 现在绝大部分项目都已经拥抱Spring生态，掌握Spring常用的工具类，是非常重要，零成本增加编码效率。

### 常用工具类 ###

1.ObjectUtils  
org.springframework.util.ObjectUtils

2.StringUtils  
org.springframework.util.StringUtils

3.CollectionUtils  
org.springframework.util.CollectionUtils

4.BeanUtils  
org.springframework.beans.BeanUtils

5.Assert  
org.springframework.util.Assert

5.NumberUtils  
org.springframework.util.NumberUtils

6.ClassUtils  
org.springframework.util.ClassUtils

7.AnnotationUtils  
org.springframework.core.annotation.AnnotationUtils

8.AopUtils  
org.springframework.aop.support.AopUtils

9.AopContext  
org.springframework.aop.framework.AopContext

10.ReflectionUtils  
org.springframework.util.ReflectionUtils

11.FileCopyUtils  
org.springframework.util.FileCopyUtils

12.FileSystemUtils  
org.springframework.util.FileSystemUtils

13.StreamUtils  
org.springframework.util.StreamUtils

14.HtmlUtils  
org.springframework.web.util.HtmlUtils

15.TypeUtils  
org.springframework.util.TypeUtils

16.Base64Utils  
org.springframework.util.Base64Utils

17.DigestUtils  
org.springframework.util.DigestUtils

18.UriUtils  
org.springframework.web.util.UriUtils

19.ResourceUtils  
org.springframework.util.ResourceUtils

20.SocketUtils  
org.springframework.util.SocketUtils

21.AntPathMatcher  
org.springframework.util.AntPathMatcher

22.ParameterNameDiscoverer  
org.springframework.core.ParameterNameDiscoverer

23.SerializationUtils  
org.springframework.util.SerializationUtils

24.SystemPropertyUtils  
org.springframework.util.SystemPropertyUtils

25.ServletRequestUtils  
org.springframework.web.bind.ServletRequestUtils

26.MimeTypeUtils  
org.springframework.util.MimeTypeUtils

27.ResolvableType  
org.springframework.core.ResolvableType

### 工具类详情 ###

1.ObjectUtils  
org.springframework.util.ObjectUtils

int ObjectUtils.nullSafeHashCode(obj)
    boolean ObjectUtils.isCheckedException(ex)
    boolean ObjectUtils.containsConstant(enumValues,constant,caseSensitive)
    boolean ObjectUtils.isCompatibleWithThrowsClause(ex,declaredExceptions)
    int ObjectUtils.nullSafeHashCode(array)
    String ObjectUtils.getIdentityHexString(obj)
    String ObjectUtils.getDisplayString(obj)
    String ObjectUtils.nullSafeToString(obj)
    String ObjectUtils.identityToString(obj)
    Object ObjectUtils.unwrapOptional(obj)
    boolean ObjectUtils.containsElement(array,element)
    Object[] ObjectUtils.toObjectArray(source)
    boolean ObjectUtils.isEmpty(obj)
    String ObjectUtils.nullSafeClassName(obj)
    boolean ObjectUtils.containsConstant(enumValues,constant)
    boolean ObjectUtils.nullSafeEquals(o1,o2)
    int ObjectUtils.hashCode(lng)
    int ObjectUtils.hashCode(bool)
    Object[] ObjectUtils.addObjectToArray(array,obj)
    boolean ObjectUtils.isEmpty(array)
    boolean ObjectUtils.isArray(obj)
    int ObjectUtils.hashCode(flt)
    Enum ObjectUtils.caseInsensitiveValueOf(enumValues,constant)
    String ObjectUtils.nullSafeToString(array)
    int ObjectUtils.hashCode(dbl)

2.StringUtils  
org.springframework.util.StringUtils

String StringUtils.collectionToDelimitedString(coll,delim,prefix,suffix)
    boolean StringUtils.substringMatch(str,index,substring)
    String[] StringUtils.addStringToArray(array,str)
    boolean StringUtils.hasText(str)
    String StringUtils.getFilename(path)
    String StringUtils.uriDecode(source,charset)
    String StringUtils.uncapitalize(str)
    String StringUtils.trimWhitespace(str)
    Properties StringUtils.splitArrayElementsIntoProperties(array,delimiter)
    String StringUtils.toLanguageTag(locale)
    String[] StringUtils.toStringArray(enumeration)
    String[] StringUtils.tokenizeToStringArray(str,delimiters)
    boolean StringUtils.pathEquals(path1,path2)
    String StringUtils.collectionToCommaDelimitedString(coll)
    TimeZone StringUtils.parseTimeZoneString(timeZoneString)
    String[] StringUtils.tokenizeToStringArray(str,delimiters,trimTokens,ignoreEmptyTokens)
    String[] StringUtils.commaDelimitedListToStringArray(str)
    boolean StringUtils.startsWithIgnoreCase(str,prefix)
    String StringUtils.getFilenameExtension(path)
    Properties StringUtils.splitArrayElementsIntoProperties(array,delimiter,charsToDelete)
    String StringUtils.capitalize(str)
    int StringUtils.countOccurrencesOf(str,sub)
    boolean StringUtils.isEmpty(str)
    String StringUtils.trimLeadingWhitespace(str)
    String[] StringUtils.delimitedListToStringArray(str,delimiter)
    String[] StringUtils.sortStringArray(array)
    String[] StringUtils.toStringArray(collection)
    String StringUtils.trimTrailingCharacter(str,trailingCharacter)
    String StringUtils.quote(str)
    Object StringUtils.quoteIfString(obj)
    String[] StringUtils.concatenateStringArrays(array1,array2)
    String StringUtils.arrayToDelimitedString(arr,delim)
    String[] StringUtils.split(toSplit,delimiter)
    String[] StringUtils.mergeStringArrays(array1,array2)
    String StringUtils.replace(inString,oldPattern,newPattern)
    String StringUtils.delete(inString,pattern)
    boolean StringUtils.endsWithIgnoreCase(str,suffix)
    Locale StringUtils.parseLocale(localeValue)
    String StringUtils.trimLeadingCharacter(str,leadingCharacter)
    String StringUtils.deleteAny(inString,charsToDelete)
    boolean StringUtils.hasLength(str)
    String[] StringUtils.trimArrayElements(array)
    Set StringUtils.commaDelimitedListToSet(str)
    String StringUtils.stripFilenameExtension(path)
    String[] StringUtils.delimitedListToStringArray(str,delimiter,charsToDelete)
    String StringUtils.trimAllWhitespace(str)
    String[] StringUtils.removeDuplicateStrings(array)
    String StringUtils.cleanPath(path)
    String StringUtils.collectionToDelimitedString(coll,delim)
    Locale StringUtils.parseLocaleString(localeString)
    boolean StringUtils.containsWhitespace(str)
    String StringUtils.unqualify(qualifiedName,separator)
    String StringUtils.unqualify(qualifiedName)
    String StringUtils.arrayToCommaDelimitedString(arr)
    String StringUtils.applyRelativePath(path,relativePath)
    String StringUtils.trimTrailingWhitespace(str)

3.CollectionUtils  
org.springframework.util.CollectionUtils

void CollectionUtils.mergePropertiesIntoMap(props,map)
    MultiValueMap CollectionUtils.unmodifiableMultiValueMap(map)
    Object[] CollectionUtils.toArray(enumeration,array)
    boolean CollectionUtils.isEmpty(collection)
    boolean CollectionUtils.contains(iterator,element)
    Object CollectionUtils.lastElement(set)
    void CollectionUtils.mergeArrayIntoCollection(array,collection)
    boolean CollectionUtils.isEmpty(map)
    Object CollectionUtils.lastElement(list)
    Object CollectionUtils.findValueOfType(collection,types)
    MultiValueMap CollectionUtils.toMultiValueMap(map)
    boolean CollectionUtils.containsAny(source,candidates)
    Object CollectionUtils.findValueOfType(collection,type)
    List CollectionUtils.arrayToList(source)
    boolean CollectionUtils.contains(enumeration,element)
    Object CollectionUtils.findFirstMatch(source,candidates)
    boolean CollectionUtils.hasUniqueObject(collection)
    Iterator CollectionUtils.toIterator(enumeration)
    Class CollectionUtils.findCommonElementType(collection)
    boolean CollectionUtils.containsInstance(collection,element)

4.BeanUtils  
org.springframework.beans.BeanUtils

PropertyDescriptor BeanUtils.getPropertyDescriptor(clazz,propertyName)
    Constructor BeanUtils.findPrimaryConstructor(clazz)
    Method BeanUtils.resolveSignature(signature,clazz)
    Method BeanUtils.findMethodWithMinimalParameters(clazz,methodName)
    Class BeanUtils.findPropertyType(propertyName,beanClasses)
    Method BeanUtils.findMethod(clazz,methodName,paramTypes)
    void BeanUtils.copyProperties(source,target,ignoreProperties)
    MethodParameter BeanUtils.getWriteMethodParameter(pd)
    Method BeanUtils.findDeclaredMethod(clazz,methodName,paramTypes)
    boolean BeanUtils.isSimpleProperty(type)
    PropertyEditor BeanUtils.findEditorByConvention(targetType)
    boolean BeanUtils.isSimpleValueType(type)
    Object BeanUtils.instantiate(clazz)
    Method BeanUtils.findMethodWithMinimalParameters(methods,methodName)
    Object BeanUtils.instantiateClass(clazz)
    void BeanUtils.copyProperties(source,target)
    Method BeanUtils.findDeclaredMethodWithMinimalParameters(clazz,methodName)
    PropertyDescriptor BeanUtils.findPropertyForMethod(method,clazz)
    PropertyDescriptor BeanUtils.findPropertyForMethod(method)
    void BeanUtils.copyProperties(source,target,editable)
    PropertyDescriptor[] BeanUtils.getPropertyDescriptors(clazz)
    Object BeanUtils.instantiateClass(clazz,assignableTo)
    Object BeanUtils.instantiateClass(ctor,args)

5.Assert  
org.springframework.util.Assert

void Assert.isInstanceOf(type,obj,messageSupplier)
    void Assert.notEmpty(collection)
    void Assert.hasText(text,message)
    void Assert.doesNotContain(textToSearch,substring)
    void Assert.notEmpty(collection,messageSupplier)
    void Assert.notNull(object,messageSupplier)
    void Assert.isInstanceOf(type,obj,message)
    void Assert.notEmpty(array,messageSupplier)
    void Assert.noNullElements(array,message)
    void Assert.state(expression)
    void Assert.hasText(text,messageSupplier)
    void Assert.isNull(object)
    void Assert.isTrue(expression,message)
    void Assert.doesNotContain(textToSearch,substring,messageSupplier)
    void Assert.notEmpty(map,message)
    void Assert.notEmpty(map)
    void Assert.hasLength(text,message)
    void Assert.state(expression,messageSupplier)
    void Assert.isInstanceOf(type,obj)
    void Assert.notNull(object,message)
    void Assert.isTrue(expression,messageSupplier)
    void Assert.isTrue(expression)
    void Assert.isAssignable(superType,subType,message)
    void Assert.notNull(object)
    void Assert.isNull(object,messageSupplier)
    void Assert.noNullElements(array,messageSupplier)
    void Assert.doesNotContain(textToSearch,substring,message)
    void Assert.notEmpty(array,message)
    void Assert.isNull(object,message)
    void Assert.notEmpty(array)
    void Assert.hasLength(text,messageSupplier)
    void Assert.notEmpty(collection,message)
    void Assert.isAssignable(superType,subType)
    void Assert.noNullElements(array)
    void Assert.hasLength(text)
    void Assert.state(expression,message)
    void Assert.isAssignable(superType,subType,messageSupplier)
    void Assert.notEmpty(map,messageSupplier)
    void Assert.hasText(text)

5.NumberUtils  
org.springframework.util.NumberUtils

Number NumberUtils.parseNumber(text,targetClass)
    Number NumberUtils.parseNumber(text,targetClass,numberFormat)
    Number NumberUtils.convertNumberToTargetClass(number,targetClass)

6.ClassUtils  
org.springframework.util.ClassUtils

boolean ClassUtils.isPrimitiveWrapperArray(clazz)
    Class ClassUtils.createCompositeInterface(interfaces,classLoader)
    String ClassUtils.getQualifiedMethodName(method,clazz)
    boolean ClassUtils.isCglibProxyClass(clazz)
    boolean ClassUtils.matchesTypeName(clazz,typeName)
    Class[] ClassUtils.getAllInterfacesForClass(clazz,classLoader)
    String ClassUtils.getPackageName(fqClassName)
    Class ClassUtils.getUserClass(instance)
    String ClassUtils.getShortNameAsProperty(clazz)
    Class ClassUtils.resolvePrimitiveClassName(name)
    boolean ClassUtils.hasConstructor(clazz,paramTypes)
    Set ClassUtils.getAllInterfacesForClassAsSet(clazz)
    boolean ClassUtils.isInnerClass(clazz)
    Class ClassUtils.determineCommonAncestor(clazz1,clazz2)
    int ClassUtils.getMethodCountForName(clazz,methodName)
    Method ClassUtils.getMethod(clazz,methodName,paramTypes)
    ClassLoader ClassUtils.getDefaultClassLoader()
    Set ClassUtils.getAllInterfacesForClassAsSet(clazz,classLoader)
    boolean ClassUtils.hasAtLeastOneMethodWithName(clazz,methodName)
    boolean ClassUtils.isAssignableValue(type,value)
    boolean ClassUtils.isJavaLanguageInterface(ifc)
    boolean ClassUtils.isPrimitiveArray(clazz)
    boolean ClassUtils.isCacheSafe(clazz,classLoader)
    String ClassUtils.classPackageAsResourcePath(clazz)
    Class ClassUtils.getUserClass(clazz)
    String ClassUtils.classNamesToString(classes)
    String ClassUtils.getDescriptiveType(value)
    Class ClassUtils.resolveClassName(className,classLoader)
    Class[] ClassUtils.toClassArray(collection)
    Class[] ClassUtils.getAllInterfacesForClass(clazz)
    Class ClassUtils.resolvePrimitiveIfNecessary(clazz)
    String ClassUtils.getShortName(clazz)
    String ClassUtils.addResourcePathToPackagePath(clazz,resourceName)
    Set ClassUtils.getAllInterfacesAsSet(instance)
    Constructor ClassUtils.getConstructorIfAvailable(clazz,paramTypes)
    boolean ClassUtils.hasMethod(clazz,methodName,paramTypes)
    String ClassUtils.convertClassNameToResourcePath(className)
    boolean ClassUtils.isPrimitiveOrWrapper(clazz)
    boolean ClassUtils.isPresent(className,classLoader)
    boolean ClassUtils.isCglibProxyClassName(className)
    boolean ClassUtils.isCglibProxy(object)
    String ClassUtils.getQualifiedName(clazz)
    String ClassUtils.getShortName(className)
    Method ClassUtils.getInterfaceMethodIfPossible(method)
    boolean ClassUtils.isUserLevelMethod(method)
    Method ClassUtils.getMostSpecificMethod(method,targetClass)
    String ClassUtils.convertResourcePathToClassName(resourcePath)
    ClassLoader ClassUtils.overrideThreadContextClassLoader(classLoaderToUse)
    Method ClassUtils.getMethodIfAvailable(clazz,methodName,paramTypes)
    String ClassUtils.getPackageName(clazz)
    Class[] ClassUtils.getAllInterfaces(instance)
    boolean ClassUtils.isVisible(clazz,classLoader)
    String ClassUtils.getClassFileName(clazz)
    boolean ClassUtils.isAssignable(lhsType,rhsType)
    Class ClassUtils.forName(name,classLoader)
    boolean ClassUtils.isPrimitiveWrapper(clazz)
    Method ClassUtils.getStaticMethod(clazz,methodName,args)
    String ClassUtils.getQualifiedMethodName(method)

7.AnnotationUtils  
org.springframework.core.annotation.AnnotationUtils

Annotation AnnotationUtils.synthesizeAnnotation(annotation,annotatedElement)
    Annotation AnnotationUtils.getAnnotation(annotation,annotationType)
    Set AnnotationUtils.getDeclaredRepeatableAnnotations(annotatedElement,annotationType)
    boolean AnnotationUtils.isInJavaLangAnnotationPackage(annotation)
    Object AnnotationUtils.getDefaultValue(annotationType)
    void AnnotationUtils.postProcessAnnotationAttributes(annotatedElement,attributes,classValuesAsString)
    Annotation AnnotationUtils.synthesizeAnnotation(annotationType)
    Set AnnotationUtils.getRepeatableAnnotations(annotatedElement,annotationType)
    AnnotationAttributes AnnotationUtils.getAnnotationAttributes(annotatedElement,annotation,classValuesAsString,nestedAnnotationsAsMap)
    Annotation AnnotationUtils.getAnnotation(annotatedElement,annotationType)
    Annotation AnnotationUtils.findAnnotation(clazz,annotationType)
    Map AnnotationUtils.getAnnotationAttributes(annotation)
    void AnnotationUtils.registerDefaultValues(attributes)
    Map AnnotationUtils.getAnnotationAttributes(annotation,classValuesAsString)
    Object AnnotationUtils.getValue(annotation,attributeName)
    Set AnnotationUtils.getDeclaredRepeatableAnnotations(annotatedElement,annotationType,containerAnnotationType)
    Object AnnotationUtils.getDefaultValue(annotation)
    boolean AnnotationUtils.isInJavaLangAnnotationPackage(annotationType)
    boolean AnnotationUtils.isAnnotationDeclaredLocally(annotationType,clazz)
    Annotation[] AnnotationUtils.getAnnotations(method)
    Annotation AnnotationUtils.findAnnotation(annotatedElement,annotationType)
    Object AnnotationUtils.getValue(annotation)
    void AnnotationUtils.validateAnnotation(annotation)
    Annotation[] AnnotationUtils.getAnnotations(annotatedElement)
    AnnotationAttributes AnnotationUtils.getAnnotationAttributes(annotatedElement,annotation)
    boolean AnnotationUtils.isAnnotationInherited(annotationType,clazz)
    boolean AnnotationUtils.isAnnotationMetaPresent(annotationType,metaAnnotationType)
    Annotation AnnotationUtils.synthesizeAnnotation(attributes,annotationType,annotatedElement)
    Set AnnotationUtils.getRepeatableAnnotations(annotatedElement,annotationType,containerAnnotationType)
    void AnnotationUtils.clearCache()
    AnnotationAttributes AnnotationUtils.getAnnotationAttributes(annotation,classValuesAsString,nestedAnnotationsAsMap)
    Class AnnotationUtils.findAnnotationDeclaringClass(annotationType,clazz)
    Class AnnotationUtils.findAnnotationDeclaringClassForTypes(annotationTypes,clazz)
    Object AnnotationUtils.getDefaultValue(annotationType,attributeName)
    Object AnnotationUtils.getDefaultValue(annotation,attributeName)
    Annotation AnnotationUtils.getAnnotation(method,annotationType)
    Annotation AnnotationUtils.findAnnotation(method,annotationType)

8.AopUtils  
org.springframework.aop.support.AopUtils

List AopUtils.findAdvisorsThatCanApply(candidateAdvisors,clazz)
    Class AopUtils.getTargetClass(candidate)
    boolean AopUtils.canApply(pc,targetClass)
    boolean AopUtils.canApply(advisor,targetClass)
    boolean AopUtils.isAopProxy(object)
    boolean AopUtils.canApply(pc,targetClass,hasIntroductions)
    Object AopUtils.invokeJoinpointUsingReflection(target,method,args)
    Method AopUtils.selectInvocableMethod(method,targetType)
    Method AopUtils.getMostSpecificMethod(method,targetClass)
    boolean AopUtils.isToStringMethod(method)
    boolean AopUtils.isJdkDynamicProxy(object)
    boolean AopUtils.isEqualsMethod(method)
    boolean AopUtils.isCglibProxy(object)
    boolean AopUtils.isHashCodeMethod(method)
    boolean AopUtils.isFinalizeMethod(method)
    boolean AopUtils.canApply(advisor,targetClass,hasIntroductions)

9.AopContext  
org.springframework.aop.framework.AopContext

Object AopContext.currentProxy()

10.ReflectionUtils  
org.springframework.util.ReflectionUtils

void ReflectionUtils.makeAccessible(method)
    void ReflectionUtils.makeAccessible(ctor)
    Method[] ReflectionUtils.getUniqueDeclaredMethods(leafClass)
    Object ReflectionUtils.invokeMethod(method,target)
    Method ReflectionUtils.findMethod(clazz,name)
    boolean ReflectionUtils.isEqualsMethod(method)
    void ReflectionUtils.rethrowRuntimeException(ex)
    boolean ReflectionUtils.isObjectMethod(method)
    void ReflectionUtils.handleInvocationTargetException(ex)
    boolean ReflectionUtils.isCglibRenamedMethod(renamedMethod)
    boolean ReflectionUtils.isToStringMethod(method)
    boolean ReflectionUtils.declaresException(method,exceptionType)
    void ReflectionUtils.shallowCopyFieldState(src,dest)
    void ReflectionUtils.doWithMethods(clazz,mc,mf)
    Object ReflectionUtils.invokeMethod(method,target,args)
    void ReflectionUtils.makeAccessible(field)
    Field ReflectionUtils.findField(clazz,name)
    Object ReflectionUtils.invokeJdbcMethod(method,target,args)
    void ReflectionUtils.rethrowException(ex)
    Method[] ReflectionUtils.getAllDeclaredMethods(leafClass)
    void ReflectionUtils.doWithLocalMethods(clazz,mc)
    Object ReflectionUtils.getField(field,target)
    Method ReflectionUtils.findMethod(clazz,name,paramTypes)
    void ReflectionUtils.doWithMethods(clazz,mc)
    void ReflectionUtils.doWithLocalFields(clazz,fc)
    void ReflectionUtils.doWithFields(clazz,fc)
    void ReflectionUtils.doWithFields(clazz,fc,ff)
    Constructor ReflectionUtils.accessibleConstructor(clazz,parameterTypes)
    void ReflectionUtils.clearCache()
    boolean ReflectionUtils.isHashCodeMethod(method)
    boolean ReflectionUtils.isPublicStaticFinal(field)
    void ReflectionUtils.setField(field,target,value)
    void ReflectionUtils.handleReflectionException(ex)
    Object ReflectionUtils.invokeJdbcMethod(method,target)
    Field ReflectionUtils.findField(clazz,name,type)

11.FileCopyUtils  
org.springframework.util.FileCopyUtils

byte[] FileCopyUtils.copyToByteArray(in)
    void FileCopyUtils.copy(in,out)
    String FileCopyUtils.copyToString(in)
    int FileCopyUtils.copy(in,out)

12.FileSystemUtils  
org.springframework.util.FileSystemUtils

boolean FileSystemUtils.deleteRecursively(root)
    void FileSystemUtils.copyRecursively(src,dest)

13.StreamUtils  
org.springframework.util.StreamUtils

void StreamUtils.copy(in,charset,out)
    int StreamUtils.drain(in)
    InputStream StreamUtils.nonClosing(in)
    OutputStream StreamUtils.nonClosing(out)
    long StreamUtils.copyRange(in,out,start,end)
    String StreamUtils.copyToString(in,charset)
    int StreamUtils.copy(in,out)
    byte[] StreamUtils.copyToByteArray(in)
    void StreamUtils.copy(in,out)
    InputStream StreamUtils.emptyInput()

14.HtmlUtils  
org.springframework.web.util.HtmlUtils

String HtmlUtils.htmlEscapeHex(input,encoding)
    String HtmlUtils.htmlUnescape(input)
    String HtmlUtils.htmlEscapeHex(input)
    String HtmlUtils.htmlEscapeDecimal(input,encoding)
    String HtmlUtils.htmlEscape(input,encoding)
    String HtmlUtils.htmlEscapeDecimal(input)
    String HtmlUtils.htmlEscape(input)

15.TypeUtils  
org.springframework.util.TypeUtils

boolean TypeUtils.isAssignable(lhsType,rhsType)
    boolean TypeUtils.isAssignableBound(lhsType,rhsType)

16.Base64Utils  
org.springframework.util.Base64Utils

byte[] Base64Utils.decodeUrlSafe(src)
    String Base64Utils.encodeToString(src)
    byte[] Base64Utils.encode(src)
    byte[] Base64Utils.encodeUrlSafe(src)
    byte[] Base64Utils.decodeFromString(src)
    byte[] Base64Utils.decode(src)
    byte[] Base64Utils.decodeFromUrlSafeString(src)
    String Base64Utils.encodeToUrlSafeString(src)

17.DigestUtils  
org.springframework.util.DigestUtils

String DigestUtils.md5DigestAsHex(bytes)
    StringBuilder DigestUtils.appendMd5DigestAsHex(bytes,builder)
    byte[] DigestUtils.md5Digest(bytes)
    StringBuilder DigestUtils.appendMd5DigestAsHex(inputStream,builder)
    byte[] DigestUtils.md5Digest(inputStream)
    String DigestUtils.md5DigestAsHex(inputStream)

18.UriUtils  
org.springframework.web.util.UriUtils

String UriUtils.encode(source,charset)
    String UriUtils.encodeAuthority(authority,charset)
    String UriUtils.encodeQueryParam(queryParam,charset)
    String UriUtils.encodeQuery(query,charset)
    String UriUtils.encodeUserInfo(userInfo,encoding)
    String UriUtils.encodePort(port,charset)
    String UriUtils.encode(source,encoding)
    String UriUtils.encodePathSegment(segment,charset)
    String UriUtils.encodeUserInfo(userInfo,charset)
    String UriUtils.encodeQuery(query,encoding)
    String UriUtils.extractFileExtension(path)
    String UriUtils.decode(source,charset)
    String UriUtils.encodeHost(host,charset)
    String UriUtils.encodeAuthority(authority,encoding)
    String UriUtils.encodePath(path,charset)
    String UriUtils.encodeHost(host,encoding)
    String UriUtils.decode(source,encoding)
    String UriUtils.encodeScheme(scheme,encoding)
    String UriUtils.encodePathSegment(segment,encoding)
    String UriUtils.encodeFragment(fragment,encoding)
    String UriUtils.encodePort(port,encoding)
    String UriUtils.encodePath(path,encoding)
    String UriUtils.encodeScheme(scheme,charset)
    Map UriUtils.encodeUriVariables(uriVariables)
    String UriUtils.encodeFragment(fragment,charset)
    String UriUtils.encodeQueryParam(queryParam,encoding)
    Object[] UriUtils.encodeUriVariables(uriVariables)

19.ResourceUtils  
org.springframework.util.ResourceUtils

URL ResourceUtils.extractArchiveURL(jarUrl)
    void ResourceUtils.useCachesIfNecessary(con)
    File ResourceUtils.getFile(resourceUri)
    URI ResourceUtils.toURI(location)
    URL ResourceUtils.extractJarFileURL(jarUrl)
    boolean ResourceUtils.isJarURL(url)
    boolean ResourceUtils.isFileURL(url)
    File ResourceUtils.getFile(resourceUrl,description)
    boolean ResourceUtils.isJarFileURL(url)
    File ResourceUtils.getFile(resourceUri,description)
    File ResourceUtils.getFile(resourceLocation)
    URL ResourceUtils.getURL(resourceLocation)
    File ResourceUtils.getFile(resourceUrl)
    boolean ResourceUtils.isUrl(resourceLocation)
    URI ResourceUtils.toURI(url)

20.SocketUtils  
org.springframework.util.SocketUtils

int SocketUtils.findAvailableUdpPort(minPort,maxPort)
    SortedSet SocketUtils.findAvailableTcpPorts(numRequested,minPort,maxPort)
    int SocketUtils.findAvailableTcpPort(minPort)
    int SocketUtils.findAvailableUdpPort()
    SortedSet SocketUtils.findAvailableTcpPorts(numRequested)
    int SocketUtils.findAvailableUdpPort(minPort)
    SortedSet SocketUtils.findAvailableUdpPorts(numRequested)
    SortedSet SocketUtils.findAvailableUdpPorts(numRequested,minPort,maxPort)
    int SocketUtils.findAvailableTcpPort()
    int SocketUtils.findAvailableTcpPort(minPort,maxPort)

21.AntPathMatcher  
org.springframework.util.AntPathMatcher

void AntPathMatcher.setPathSeparator(pathSeparator)
    String AntPathMatcher.combine(pattern1,pattern2)
    boolean AntPathMatcher.isPattern(path)
    void AntPathMatcher.setCachePatterns(cachePatterns)
    void AntPathMatcher.setTrimTokens(trimTokens)
    void AntPathMatcher.setCaseSensitive(caseSensitive)
    Map AntPathMatcher.extractUriTemplateVariables(pattern,path)
    boolean AntPathMatcher.matchStart(pattern,path)
    boolean AntPathMatcher.match(pattern,path)
    String AntPathMatcher.extractPathWithinPattern(pattern,path)
    Comparator AntPathMatcher.getPatternComparator(path)

22.ParameterNameDiscoverer  
org.springframework.core.ParameterNameDiscoverer

String[] ParameterNameDiscoverer.getParameterNames()

23.SerializationUtils  
org.springframework.util.SerializationUtils

Object SerializationUtils.deserialize(bytes)
    byte[] SerializationUtils.serialize(object)

24.SystemPropertyUtils  
org.springframework.util.SystemPropertyUtils

String SystemPropertyUtils.resolvePlaceholders(text)
    String SystemPropertyUtils.resolvePlaceholders(text,ignoreUnresolvablePlaceholders)

25.ServletRequestUtils  
org.springframework.web.bind.ServletRequestUtils

String ServletRequestUtils.getStringParameter(request,name)
    String[] ServletRequestUtils.getStringParameters(request,name)
    long ServletRequestUtils.getRequiredLongParameter(request,name)
    int[] ServletRequestUtils.getIntParameters(request,name)
    long[] ServletRequestUtils.getRequiredLongParameters(request,name)
    float ServletRequestUtils.getRequiredFloatParameter(request,name)
    double[] ServletRequestUtils.getDoubleParameters(request,name)
    String ServletRequestUtils.getStringParameter(request,name,defaultVal)
    Integer ServletRequestUtils.getIntParameter(request,name)
    Double ServletRequestUtils.getDoubleParameter(request,name)
    double ServletRequestUtils.getDoubleParameter(request,name,defaultVal)
    long[] ServletRequestUtils.getLongParameters(request,name)
    double ServletRequestUtils.getRequiredDoubleParameter(request,name)
    boolean[] ServletRequestUtils.getRequiredBooleanParameters(request,name)
    float[] ServletRequestUtils.getFloatParameters(request,name)
    Boolean ServletRequestUtils.getBooleanParameter(request,name)
    Float ServletRequestUtils.getFloatParameter(request,name)
    double[] ServletRequestUtils.getRequiredDoubleParameters(request,name)
    int ServletRequestUtils.getRequiredIntParameter(request,name)
    float[] ServletRequestUtils.getRequiredFloatParameters(request,name)
    float ServletRequestUtils.getFloatParameter(request,name,defaultVal)
    boolean ServletRequestUtils.getRequiredBooleanParameter(request,name)
    boolean ServletRequestUtils.getBooleanParameter(request,name,defaultVal)
    boolean[] ServletRequestUtils.getBooleanParameters(request,name)
    Long ServletRequestUtils.getLongParameter(request,name)
    String ServletRequestUtils.getRequiredStringParameter(request,name)
    int ServletRequestUtils.getIntParameter(request,name,defaultVal)
    long ServletRequestUtils.getLongParameter(request,name,defaultVal)
    String[] ServletRequestUtils.getRequiredStringParameters(request,name)
    int[] ServletRequestUtils.getRequiredIntParameters(request,name)

26.MimeTypeUtils  
org.springframework.util.MimeTypeUtils

List MimeTypeUtils.tokenize(mimeTypes)
    MimeType MimeTypeUtils.parseMimeType(mimeType)
    byte[] MimeTypeUtils.generateMultipartBoundary()
    List MimeTypeUtils.parseMimeTypes(mimeTypes)
    String MimeTypeUtils.toString(mimeTypes)
    void MimeTypeUtils.sortBySpecificity(mimeTypes)
    String MimeTypeUtils.generateMultipartBoundaryString()

27.ResolvableType  
org.springframework.core.ResolvableType

### 备注 ###

打印工具类方法

/**
     * @author kancy
     * @date 2019/12/23 23:08
     **/
    public class SpringUtils {
        private static final ParameterNameDiscoverer parameterNameDiscoverer = new DefaultParameterNameDiscoverer();
    
        public static void main(String[] args) {
            printClassMethod();
        }
    
        private static void printClassMethod() {
            printClassMethod(ObjectUtils.class);
            printClassMethod(StringUtils.class);
            printClassMethod(CollectionUtils.class);
            printClassMethod(BeanUtils.class);
            printClassMethod(Assert.class);
            printClassMethod(NumberUtils.class);
            printClassMethod(ClassUtils.class);
            printClassMethod(AnnotationUtils.class);
            printClassMethod(AopUtils.class);
            printClassMethod(AopContext.class);
            printClassMethod(ReflectionUtils.class);
            printClassMethod(FileCopyUtils.class);
            printClassMethod(FileSystemUtils.class);
            printClassMethod(StreamUtils.class);
            printClassMethod(HtmlUtils.class);
            printClassMethod(TypeUtils.class);
            printClassMethod(Base64Utils.class);
            printClassMethod(DigestUtils.class);
            printClassMethod(UriUtils.class);
            printClassMethod(ResourceUtils.class);
            printClassMethod(SocketUtils.class);
            printClassMethod(AntPathMatcher.class);
            printClassMethod(ParameterNameDiscoverer.class);
            printClassMethod(SerializationUtils.class);
            printClassMethod(SystemPropertyUtils.class);
            printClassMethod(ServletRequestUtils.class);
            printClassMethod(MimeTypeUtils.class);
        }
    
        private static AtomicInteger atomicInteger = new AtomicInteger(0);
        private static void printClassMethod(Class<?> utilsClass) {
            Method[] methods = utilsClass.getMethods();
            Set<String> set = new HashSet();
            Arrays.stream(methods).forEach(method -> {
                if (method.getDeclaringClass() == utilsClass){
                    String methodPath = String.format("%s %s.%s(%s)",
                            method.getReturnType().getSimpleName(),
                            method.getDeclaringClass().getSimpleName(),
                            method.getName(),
                            StringUtils.arrayToCommaDelimitedString(parameterNameDiscoverer.getParameterNames(method))
                    );
                    set.add(methodPath);
                }
            });
            System.out.println(atomicInteger.incrementAndGet()+". "+utilsClass.getSimpleName());
            System.out.println("`"+utilsClass.getName()+"`");
        }
    }

转载自：https://www.cnblogs.com/kancy/p/12089025.html