com.lc.core

Class Assert

java.lang.Object

com.lc.core.Assert

public class Assert
extends Object

断言
断言某些对象或值是否符合规定，否则抛出异常。经常用于做变量检查

Author:

LC

Constructor Summary

Constructors

Constructor and Description
Assert()

Method Summary

Modifier and Type	Method and Description
static void	isTrue(boolean expression) 断言是否为真，如果为 false 抛出 IllegalArgumentException 异常 Assert.isTrue(i > 0, "The value must be greater than zero");
static void	isTrue(boolean expression, String errorMsgTemplate, Object... params) 断言是否为真，如果为 false 抛出 IllegalArgumentException 异常 Assert.isTrue(i > 0, "The value must be greater than zero");
static String	notBlank(String text) 检查给定字符串是否为空白（null、空串或只包含空白符），为空抛出 IllegalArgumentException Assert.notBlank(name, "Name must not be blank");
static String	notBlank(String text, String errorMsgTemplate, Object... params) 检查给定字符串是否为空白（null、空串或只包含空白符），为空抛出 IllegalArgumentException Assert.notBlank(name, "Name must not be blank");
static <T> T	notNull(T object) 断言对象是否不为null ，如果为null 抛出NullPointerException 异常 Assert.notNull(clazz);
static <T> T	notNull(T object, String errorMsgTemplate, Object... params) 断言对象是否不为null ，如果为null 抛出NullPointerException 异常 Assert that an object is not null .

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Assert

public Assert()

Method Detail

isTrue

public static void isTrue(boolean expression,
                          String errorMsgTemplate,
                          Object... params)
                   throws IllegalArgumentException

断言是否为真，如果为 false 抛出 IllegalArgumentException 异常

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

Parameters:

expression - 波尔值

errorMsgTemplate - 错误抛出异常附带的消息模板，变量用{}代替

params - 参数列表

Throws:

IllegalArgumentException - if expression is false

isTrue

public static void isTrue(boolean expression)
                   throws IllegalArgumentException

断言是否为真，如果为 false 抛出 IllegalArgumentException 异常

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

Parameters:

expression - 波尔值

Throws:

IllegalArgumentException - if expression is false

notNull

public static <T> T notNull(T object,
                            String errorMsgTemplate,
                            Object... params)
                     throws NullPointerException

断言对象是否不为null ，如果为null 抛出NullPointerException 异常 Assert that an object is not null .

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

Type Parameters:

T - 被检查对象泛型类型

Parameters:

object - 被检查对象

errorMsgTemplate - 错误消息模板，变量使用{}表示

params - 参数

Returns:

被检查后的对象

Throws:

NullPointerException - if the object is null

notNull

public static <T> T notNull(T object)
                     throws NullPointerException

断言对象是否不为null ，如果为null 抛出NullPointerException 异常

 Assert.notNull(clazz);
 

Type Parameters:

T - 被检查对象类型

Parameters:

object - 被检查对象

Returns:

非空对象

Throws:

NullPointerException - if the object is null

notBlank

public static String notBlank(String text)
                       throws IllegalArgumentException

检查给定字符串是否为空白（null、空串或只包含空白符），为空抛出 IllegalArgumentException

 Assert.notBlank(name, "Name must not be blank");
 

Parameters:

text - 被检查字符串

Returns:

非空字符串

Throws:

IllegalArgumentException - 被检查字符串为空白

See Also:

UStringUtil.isNotBlank(CharSequence)

notBlank

public static String notBlank(String text,
                              String errorMsgTemplate,
                              Object... params)
                       throws IllegalArgumentException

检查给定字符串是否为空白（null、空串或只包含空白符），为空抛出 IllegalArgumentException

 Assert.notBlank(name, "Name must not be blank");
 

Parameters:

text - 被检查字符串

errorMsgTemplate - 错误消息模板，变量使用{}表示

params - 参数

Returns:

非空字符串

Throws:

IllegalArgumentException - 被检查字符串为空白

See Also:

UStringUtil.isNotBlank(CharSequence)