spring中PropertyPlaceholderHelper替换占位符的值

最新推荐文章于 2024-06-04 10:29:58 发布

转载最新推荐文章于 2024-06-04 10:29:58 发布 · 263 阅读

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原文链接：http://www.cnblogs.com/xunianchong/p/6650677.html

文章标签：

#java

本文通过两个示例展示了如何使用Java中的PropertyPlaceholderHelper类来实现字符串中属性占位符（如${foo}

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1.Properties中的值替换￥{}或者#{}占位符

    String text = "foo=${foo},bar=${bar}";
        Properties props = new Properties();
        props.setProperty("foo", "foo_value");
        props.setProperty("bar", "bar_value");
        PropertyPlaceholderHelper helper = new PropertyPlaceholderHelper("${", "}", null, false);
        System.out.println( helper.replacePlaceholders(text, props));

2.hashmap或者对象替换￥{}或者#{}占位符

final Map<String,String> params = new HashMap<>();
        params.put("foo", "bar");
        params.put("bar", "bar");
        PropertyPlaceholderHelper helper1 = new PropertyPlaceholderHelper("${", "}", null, false);
        String s = helper1.replacePlaceholders(text, new PlaceholderResolver() {
            @Override
            public String resolvePlaceholder(String placeholderName) {
                // TODO Auto-generated method stub
                return params.get(placeholderName);
            }
        });
        System.out.println(s);