StringTemplate初步使用

例子1：

    private static void test_1(String[] args) throws Exception {
        ST hello = new ST("Hello, <name>");
        hello.add("name", "World");
        System.out.println(hello.render());
    }

例子1输出：

Hello, World

例子2：

    private static void test_2(String[] args) throws Exception {

        String g =
                "a(x) ::= <<foo>>\n"+
                "b() ::= <<bar>>\n";
        STGroup group = new STGroupString(g);
        ST st = group.getInstanceOf("a");
        String result = st.render();

        System.out.println(result);
    }

例子2输出：

foo

例子3：

    private static void test_3(String[] args) throws Exception {

        STGroup group = new STGroupFile("./src/com/test/stringtemplate/a.stg");
        ST st = group.getInstanceOf("a");
        String result = st.render();

        System.out.println(result);
    }

例子3输出：

foo