ClassUtils (Commons core 1.4 API)

java.lang.Object
- cn.ponfee.commons.reflect.ClassUtils

public final class ClassUtils
extends Object

基于asm的Class工具类

作者:: Ponfee

构造器概要

构造器
构造器和说明

ClassUtils()

构造器
构造器和说明
`ClassUtils()`

方法概要

所有方法静态方法具体方法
限定符和类型	方法和说明
`static String`	`getClassFilePath(Class<?> clazz)` 获取类文件的路径（文件） ClassUtils.getClassFilePath(ClassUtils.class) -> /Users/ponfee/scm/github/commons-core/target/classes/code/ponfee/commons/reflect/ClassUtils.class ClassUtils.getClassFilePath(org.apache.commons.lang3.StringUtils.class) -> /Users/ponfee/.m2/repository/org/apache/commons/commons-lang3/3.12.0/commons-lang3-3.12.0.jar!
`static String`	`getClassName(Class<?> clazz)` 获取类名称 ClassUtils.getClassName(ClassUtils.class) -> cn.ponfee.commons.reflect.ClassUtils
`static String`	`getClasspath()` 获取当前的类路径（目录） ClassUtils.getClasspath() -> /Users/ponfee/scm/github/commons-core/target/test-classes/
`static String`	`getClasspath(Class<?> clazz)` 获取指定类的类路径（目录） ClassUtils.getClasspath(ClassUtils.class) -> /Users/ponfee/scm/github/commons-core/target/classes/ ClassUtils.getClasspath(org.apache.commons.lang3.StringUtils.class) -> /Users/ponfee/.m2/repository/org/apache/commons/commons-lang3/3.12.0/
`static <T> Constructor<T>`	`getConstructor(Class<T> type, Class<?>... parameterTypes)`
`static Field`	`getField(Class<?> clazz, String fieldName)` Returns the member field(include super class)
`static Method`	`getMethod(Object caller, String methodName, Class<?>... parameterTypes)`
`static String[]`	`getMethodParamNames(Method method)` 获取方法的参数名（编译未清除） ClassUtils.getMethodParamNames(ClassUtils.class.getMethod("newInstance", Class.class, Class.class, Object.class)) -> [type, parameterType, arg]
`static String`	`getMethodSignature(Method method)` 获取方法签名 ClassUtils.getMethodSignature(ClassUtils.class.getMethod("newInstance", Class.class, Class.class, Object.class)) -> public static java.lang.Object cn.ponfee.commons.reflect.ClassUtils.newInstance(java.lang.Class type, java.lang.Class parameterType, java.lang.Object arg)
`static String`	`getPackagePath(Class<?> clazz)` 包名称转目录路径名 ClassUtils.getPackagePath(ClassUtils.class) -> code/ponfee/commons/reflect
`static String`	`getPackagePath(String packageName)` 包名称转目录路径名 getPackagePath("cn.ponfee.commons.reflect") -> code/ponfee/commons/reflect
`static Field`	`getStaticField(Class<?> clazz, String staticFieldName)` Returns the static field
`static Tuple2<Class<?>,Field>`	`getStaticFieldInClassChain(Class<?> clazz, String staticFieldName)` Returns the static field, find in class pointer chain
`static <T> T`	`invoke(Object caller, Method method)`
`static <T> T`	`invoke(Object caller, Method method, Object[] args)`
`static <T> T`	`invoke(Object caller, String methodName)`
`static <T> T`	`invoke(Object caller, String methodName, Class<?>[] parameterTypes, Object[] args)`
`static <T> T`	`invoke(Object caller, String methodName, Object[] args)`
`static List<Field>`	`listFields(Class<?> clazz)` Returns member field list include super class(exclude transient field)
`static <T> T`	`newInstance(Class<T> type)`
`static <T> T`	`newInstance(Class<T> type, Class<?>[] parameterTypes, Object[] args)`
`static <T> T`	`newInstance(Class<T> type, Object[] args)` 泛型参数的构造函数需要使用 {`newInstance(Class, Class[], Object[])`} ClassUtils.newInstance(Tuple3.class, new Object[]{1, 2, 3}) ClassUtils.newInstance(Tuple2.class, new Object[]{new String[]{"a", "b"}, new Integer[]{1, 2}})
`static <T> T`	`newInstance(Constructor<T> constructor)`
`static <T> T`	`newInstance(Constructor<T> constructor, Object[] args)`
`static Tuple2<Class<?>,Predicates>`	`obtainClass(Object obj)`

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - ClassUtils
```
public ClassUtils()
```
- 方法详细资料
  - getMethodParamNames
```
public static String[] getMethodParamNames(Method method)
```
    获取方法的参数名（编译未清除）
    ClassUtils.getMethodParamNames(ClassUtils.class.getMethod("newInstance", Class.class, Class.class, Object.class)) -> [type, parameterType, arg]
    
    参数:
    
    method - the method
    
    返回:
    
    method args name
    
    另请参阅:
    
    LocalVariableTableParameterNameDiscoverer.getParameterNames(Method)
  - getMethodSignature
```
public static String getMethodSignature(Method method)
```
    获取方法签名
    ClassUtils.getMethodSignature(ClassUtils.class.getMethod("newInstance", Class.class, Class.class, Object.class)) -> public static java.lang.Object cn.ponfee.commons.reflect.ClassUtils.newInstance(java.lang.Class type, java.lang.Class parameterType, java.lang.Object arg)
    
    参数:
    
    method - the method
    
    返回:
    
    the method string
    
    另请参阅:
    
    Method.toString(), Method.toGenericString()
  - getField
```
public static Field getField(Class<?> clazz,
                             String fieldName)
```
    Returns the member field(include super class)
    
    参数:
    
    clazz - the type
    
    fieldName - the field name
    
    返回:
    
    member field object
  - listFields
```
public static List<Field> listFields(Class<?> clazz)
```
    Returns member field list include super class(exclude transient field)
    
    参数:
    
    clazz - the class
    
    返回:
    
    a list filled fields
  - getStaticFieldInClassChain
```
public static Tuple2<Class<?>,Field> getStaticFieldInClassChain(Class<?> clazz,
                                                                String staticFieldName)
```
    Returns the static field, find in class pointer chain
    
    参数:
    
    clazz - the clazz
    
    staticFieldName - the static field name
    
    返回:
    
    static field object
  - getStaticField
```
public static Field getStaticField(Class<?> clazz,
                                   String staticFieldName)
```
    Returns the static field
    
    参数:
    
    clazz - the clazz
    
    staticFieldName - the static field name
    
    返回:
    
    static field object
  - getClassName
```
public static String getClassName(Class<?> clazz)
```
    获取类名称
    ClassUtils.getClassName(ClassUtils.class) -> cn.ponfee.commons.reflect.ClassUtils
    
    参数:
    
    clazz - the class
    
    返回:
    
    class full name
  - getPackagePath
```
public static String getPackagePath(String packageName)
```
    包名称转目录路径名
    getPackagePath("cn.ponfee.commons.reflect") -> code/ponfee/commons/reflect
    
    参数:
    
    packageName - the package name
    
    返回:
    
    另请参阅:
    
    ClassUtils.convertClassNameToResourcePath(java.lang.String)
  - getPackagePath
```
public static String getPackagePath(Class<?> clazz)
```
    包名称转目录路径名
    ClassUtils.getPackagePath(ClassUtils.class) -> code/ponfee/commons/reflect
    
    参数:
    
    clazz - the class
    
    返回:
    
    spec class file path
  - getClassFilePath
```
public static String getClassFilePath(Class<?> clazz)
```
    获取类文件的路径（文件）
    ClassUtils.getClassFilePath(ClassUtils.class) -> /Users/ponfee/scm/github/commons-core/target/classes/code/ponfee/commons/reflect/ClassUtils.class
    ClassUtils.getClassFilePath(org.apache.commons.lang3.StringUtils.class) -> /Users/ponfee/.m2/repository/org/apache/commons/commons-lang3/3.12.0/commons-lang3-3.12.0.jar!/org/apache/commons/lang3/StringUtils.class
    
    参数:
    
    clazz - the class
    
    返回:
    
    spec class file path
  - getClasspath
```
public static String getClasspath(Class<?> clazz)
```
    获取指定类的类路径（目录）
    ClassUtils.getClasspath(ClassUtils.class) -> /Users/ponfee/scm/github/commons-core/target/classes/
    ClassUtils.getClasspath(org.apache.commons.lang3.StringUtils.class) -> /Users/ponfee/.m2/repository/org/apache/commons/commons-lang3/3.12.0/
    
    参数:
    
    clazz - the class
    
    返回:
    
    spec classpath
  - getClasspath
```
public static String getClasspath()
```
    获取当前的类路径（目录）
    ClassUtils.getClasspath() -> /Users/ponfee/scm/github/commons-core/target/test-classes/
    
    返回:
    
    current main classpath
  - getConstructor
```
public static <T> Constructor<T> getConstructor(Class<T> type,
                                                Class<?>... parameterTypes)
```
  - newInstance
```
public static <T> T newInstance(Constructor<T> constructor)
```
  - newInstance
```
public static <T> T newInstance(Constructor<T> constructor,
                                Object[] args)
```
  - newInstance
```
public static <T> T newInstance(Class<T> type,
                                Class<?>[] parameterTypes,
                                Object[] args)
```
  - newInstance
```
public static <T> T newInstance(Class<T> type)
```
  - newInstance
```
public static <T> T newInstance(Class<T> type,
                                Object[] args)
```
    泛型参数的构造函数需要使用 {newInstance(Class, Class[], Object[])}
    ClassUtils.newInstance(Tuple3.class, new Object[]{1, 2, 3})
    ClassUtils.newInstance(Tuple2.class, new Object[]{new String[]{"a", "b"}, new Integer[]{1, 2}})
    
    类型参数:
    
    T -
    
    参数:
    
    type - the type
    
    args - the args
    
    返回:
  - getMethod
```
public static Method getMethod(Object caller,
                               String methodName,
                               Class<?>... parameterTypes)
```
  - invoke
```
public static <T> T invoke(Object caller,
                           Method method)
```
  - invoke
```
public static <T> T invoke(Object caller,
                           Method method,
                           Object[] args)
```
  - invoke
```
public static <T> T invoke(Object caller,
                           String methodName)
```
  - invoke
```
public static <T> T invoke(Object caller,
                           String methodName,
                           Class<?>[] parameterTypes,
                           Object[] args)
```
  - invoke
```
public static <T> T invoke(Object caller,
                           String methodName,
                           Object[] args)
```
  - obtainClass
```
public static Tuple2<Class<?>,Predicates> obtainClass(Object obj)
```

类 ClassUtils

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

ClassUtils

方法详细资料

getMethodParamNames

getMethodSignature

getField

listFields

getStaticFieldInClassChain

getStaticField

getClassName

getPackagePath

getPackagePath

getClassFilePath

getClasspath

getClasspath

getConstructor

newInstance

newInstance

newInstance

newInstance

newInstance

getMethod

invoke

invoke

invoke

invoke

invoke

obtainClass