Posted on 2013-01-17 01:18
penngo 阅读(1627)
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javascript
在制作模板内容输出时，很经常会使用<%=%>之类的占位符，用正则的方式很方便替换这个内容，工作中只接触到java、php、js，三种语言的简单的实现方式：
java版
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class TestRex {
public static void main(String[] args) {
Map<String, String> map = new HashMap<String, String>();
map.put("name", "penngo");
map.put("date", "2013-01-17");
Pattern p = Pattern.compile("<%=(\\w+?)%>");
String str = "<%=date%>, Hello <%=name%>";
Matcher m = p.matcher(str);
StringBuffer sb = new StringBuffer();
boolean result = m.find();
while (result) {
String key = m.group(1);
String value = map.get(key);
m.appendReplacement(sb, value);
result = m.find();
}
m.appendTail(sb);
System.out.println(sb.toString());
}
}
php版
<?php
$data = array('name'=>'penngo', 'date'=>'2013-01-17');
function replaceStr($key, $data){
return $data[$key];
}
$str = '<%=date%>, Hello <%=name%>';
$str = preg_replace("/<%=(\w+?)%>/ise", "replaceStr('\\1', \$data)", $str);
echo $str;
?>
js版
<html>
<head>
<meta charset="UTF-8">
<script type="text/javascript">
var date = {'name':'penngo', 'date':'2013-01-17'};
var str = '<%=date%>, Hello <%=name%>';
str = str.replace(/<%=(\w+?)%>/g, function($0, $1){
var value = date[$1];
return value;
});
document.write(str);
</script>
</head>
<body>
</body>
</html>
运行结果输出:
2013-01-17, Hello penngo