知识大全 jsp if else语句使用方法

Posted 2022-07-20 语句

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　　if else在大部份编程语言中都是这样使用的我们今天来简单的介绍一下关于jsp教程中的if else 与多重条件判断

　　<HTML> <HEAD> <TITLE>Using the if Statement</TITLE> </HEAD>

　　<BODY> <H >Using the if Statement</H > <% int value = ;

　　if(value > ) out println("Absolute value of " + value + " = " + value); %> </BODY> </HTML> 简单对比

　　<HTML> <HEAD> <TITLE>Using Compound Statements</TITLE> </HEAD>

　　<BODY> <H >Using Compound Statements</H > <% int value = ;

　　if(value > ) out println("The number was positive "); out println("Absolute value of " + value + " = " + value); %> </BODY> </HTML>

　　if else

　　<HTML> <HEAD> <TITLE>Nested if Statements</TITLE> </HEAD>

　　<BODY> <H >Nested if Statements</H > <% double value = ;

　　if (value != ) if (value > ) out println("The result = " + ( / value)); else out println("Sorry we need a positive number "); %> </BODY> </HTML> 多个条件if else

　　<HTML> <HEAD> <TITLE>Using an if else Ladder</TITLE> </HEAD>

　　<BODY> <H >Using an if else Ladder</H > <% String day = "Friday";

　　if(day == "Monday") out println("It s Monday "); else if (day == "Tuesday") out println("It s Tuesday "); else if (day == "Wednesday") out println("It s Wednesday "); else if (day == "Thurssday") out println("It s Thursday "); else if (day == "Friday") out println("It s Friday "); else if (day == "Saturday") out println("It s else if (day == "Sunday") out println("It s Sunday "); %> </BODY> </HTML>

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