解释器模式

Folgerjun · web-flow · commit 608469548198 · 2018-03-12T10:42:43.000+08:00
解释器模式
diff --git a/java-des/src/com/java/design/interpreter/AdvanceExpression.java b/java-des/src/com/java/design/interpreter/AdvanceExpression.java
@@ -0,0 +1,10 @@
+package com.java.design.interpreter;
+
+public class AdvanceExpression extends Expression {
+
+	@Override
+	void interpret() {
+
+		System.out.println("这是一个高级解析器 ...");
+	}
+}
diff --git a/java-des/src/com/java/design/interpreter/Context.java b/java-des/src/com/java/design/interpreter/Context.java
@@ -0,0 +1,28 @@
+package com.java.design.interpreter;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Context {
+
+	private String content;
+
+	private List<Expression> expressionList = new ArrayList<Expression>();
+
+	public String getContent() {
+		return content;
+	}
+
+	public void setContent(String content) {
+		this.content = content;
+	}
+
+	public void add(Expression expression) {
+		expressionList.add(expression);
+	}
+
+	public List<Expression> getList() {
+		return expressionList;
+	}
+
+}
diff --git a/java-des/src/com/java/design/interpreter/Expression.java b/java-des/src/com/java/design/interpreter/Expression.java
@@ -0,0 +1,6 @@
+package com.java.design.interpreter;
+
+public abstract class Expression {
+
+	abstract void interpret();
+}
diff --git a/java-des/src/com/java/design/interpreter/InterpreterPattern.java b/java-des/src/com/java/design/interpreter/InterpreterPattern.java
@@ -0,0 +1,25 @@
+package com.java.design.interpreter;
+
+/**
+ * 解释器模式 -----> 是一种用得比较少的行为型模式.提供了一种解释语言的语法或表达式的方式. 通过定义一个表达式接口,解释一个特定的上下文.
+ * 
+ * @author Administrator
+ *
+ */
+public class InterpreterPattern {
+
+	public static void main(String[] args) {
+
+		Context context = new Context();
+		context.add(new SimpleExpression());
+		context.add(new SimpleExpression());
+		context.add(new AdvanceExpression());
+		context.add(new SimpleExpression());
+
+		for (Expression ex : context.getList()) {
+
+			ex.interpret();
+		}
+	}
+
+}
diff --git a/java-des/src/com/java/design/interpreter/SimpleExpression.java b/java-des/src/com/java/design/interpreter/SimpleExpression.java
@@ -0,0 +1,10 @@
+package com.java.design.interpreter;
+
+public class SimpleExpression extends Expression {
+
+	@Override
+	void interpret() {
+
+		System.out.println("这是一个简单的解析器 ...");
+	}
+}
