Enjoy 3.2 release ^_^

src/main/java/com/jfinal/template/ext/directive/DateDirective.java

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+/**
+ * Copyright (c) 2011-2017, James Zhan 詹波 (jfinal@126.com).
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jfinal.template.ext.directive;
+
+import java.io.Writer;
+import java.text.SimpleDateFormat;
+import com.jfinal.template.Directive;
+import com.jfinal.template.Env;
+import com.jfinal.template.TemplateException;
+import com.jfinal.template.expr.ast.Expr;
+import com.jfinal.template.expr.ast.ExprList;
+import com.jfinal.template.stat.ParseException;
+import com.jfinal.template.stat.Scope;
+
+/**
+ * 不带参时，按默认 pattern 输出当前日期
+ * 
+ * #date() 指令支持无参时获取当前指令，第一个参数 string 当成是 pattern
+ * 
+ * 日期输出指令，第一个参数是被输出的 java.util.Date 对象或其子类对象
+ * 无第二个参数时按默认 patter 输出，第二个参数为 expr 表达式，表示 pattern
+ * 第二个为 date 时，表示当第一个为 null 时的默认值
+ */
+public class DateDirective extends Directive {
+	
+	private Expr valueExpr;
+	private Expr datePatternExpr;
+	private int paraNum;
+	
+	public void setExprList(ExprList exprList) {
+		this.paraNum = exprList.length();
+		if (paraNum > 2) {
+			throw new ParseException("Wrong number parameter of #date directive, two parameters allowed at most", location);
+		}
+		
+		if (paraNum == 0) {
+			this.valueExpr = null;
+			this.datePatternExpr = null;
+		} else if (paraNum == 1) {
+			this.valueExpr = exprList.getExprArray()[0];
+			this.datePatternExpr = null;
+		} else if (paraNum == 2) {
+			this.valueExpr = exprList.getExprArray()[0];
+			this.datePatternExpr = exprList.getExprArray()[1];
+		}
+	}
+	
+	public void exec(Env env, Scope scope, Writer writer) {
+		if (paraNum == 0) {
+			outputToday(env, writer);
+		} else if (paraNum == 1) {
+			outputWithoutDatePattern(env, scope, writer);
+		} else if (paraNum == 2) {
+			outputWithDatePattern(env, scope, writer);
+		}
+	}
+	
+	private void outputToday(Env env, Writer writer) {
+		Object value = format(new java.util.Date(), env.getEngineConfig().getDatePattern());
+		write(writer, value.toString());
+	}
+	
+	private void outputWithoutDatePattern(Env env, Scope scope, Writer writer) {
+		Object value = valueExpr.eval(scope);
+		if (value != null) {
+			value = format(value, env.getEngineConfig().getDatePattern());
+			write(writer, value.toString());
+		}
+	}
+	
+	private void outputWithDatePattern(Env env, Scope scope, Writer writer) {
+		Object value = valueExpr.eval(scope);
+		if (value == null) {
+			return ;
+		}
+		
+		Object dp = this.datePatternExpr.eval(scope);
+		if ( !(dp instanceof String) ) {
+			throw new TemplateException("The sencond parameter dataPattern of #date directive must be String", location);
+		}
+		value = format(value, (String)dp);
+		write(writer, value.toString());
+	}
+	
+	private String format(Object value, String datePattern) {
+		try {
+			return new SimpleDateFormat(datePattern).format(value);
+		} catch (Exception e) {
+			throw new TemplateException(e.getMessage(), location, e);
+		}
+	}
+}
+
+
+
+
+
+
+
+