org.springframework.util

类 Assert

java.lang.Object

org.springframework.util.Assert

public abstract class Assert
extends Object

构造器概要

构造器

构造器和说明
Assert()

方法概要

限定符和类型	方法和说明
static void	isTrue(boolean expression, String message) Assert a boolean expression, throwing an IllegalArgumentException if the expression evaluates to false.
static void	notNull(Object object, String message) Assert that an object is not null.

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

Assert

public Assert()

方法详细资料

notNull

public static void notNull(@Nullable
                           Object object,
                           String message)

Assert that an object is not null.

Assert.notNull(clazz, "The class must not be null");

参数:

object - the object to check

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if the object is null

isTrue

public static void isTrue(boolean expression,
                          String message)

Assert a boolean expression, throwing an IllegalArgumentException if the expression evaluates to false.

Assert.isTrue(i > 0, "The value must be greater than zero");

参数:

expression - a boolean expression

message - the exception message to use if the assertion fails

抛出:

IllegalArgumentException - if expression is false