org.beetl.core

接口 Function

所有已知实现类:

AccessExpressionIfFunction, AccessUrlIfFunction, AssertFunction, AuthenticationFunction, BaseSimulate.ReuqestBodyFunction, CheckExistFunction, CookieFunction, DateFunction, DebugFunction, DecodeFunction, DynamicGlobalValueFunction, EmptyExpressionFunction, EmptyFunction, FileFunctionWrapper, Flush, FunctionWrapper, GetValueFunction, HasAttributeFunction, HasWebSession, IsNotEmptyExpressionFunction, Json, MutipleFunctionWrapper, NutJsonFunction, NVLFunction, PageContextFunction, ParseDouble, ParseInt, ParseLong, Print, Printf, PrintFile, Println, QuestionMark, Range, ResourceFunction, SingleFunctionWrapper, SpELFunction, Test.TestFun, TruncFunction, TruncFunction2, TypeNameFunction, TypeNewFunction

public interface Function

Beetl函数接口，用户可以通过实现此接口来自定一方法，譬如 实现一个将字符创转为大写的函数"str.upcase"

 group.registerFunction("str.upcase", new Function() {
 
        public String call(Object[] paras, Context ctx) {
                String str = (String) paras[0];
                return str.toUpperCase();
        }
 
 });
 

str.upcase接收一个字符串参数，并将其转为大写，如下调用

 hello,this is ${str.upcase(user.name)}
 

从以下版本开始:

1.1

作者:

jeolli

方法概要

限定符和类型	方法和说明
Object	call(Object[] paras, Context ctx)

方法详细资料

call

Object call(Object[] paras,
            Context ctx)

参数:

paras - beetl传递的参数

ctx -

返回: