经常在一些网站注册以后，收到一封邮件。
下面分析怎样解析mailTemplate.
主要就是利用Matcher中的appendReplacement和appendTail方法。
package com.free.regular;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.InvalidPropertiesFormatException;
import java.util.Map;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Replacement {
/**
* source: source
*/
private static StringBuilder source = null;
/**
*
* Replacement
*
* @since ver1.00
*/
private Replacement(){
}
/**
* getMessage
* @param template
* @param params
* @return Syring
*/
public String getMessage(final String template,
final Map<String, Object> params) {
Pattern pattern = Pattern
.compile("(\\$([a-zA-Z][a-zA-Z0-9_-]*))");
Matcher matcher = pattern.matcher(template);
StringBuffer result = new StringBuffer();
while (matcher.find()) {
matcher.appendReplacement(result, "$1"
+ " : " + params.get(matcher.group(1)).toString().replace("\\",
"\\\\").replace("$", "\\$"));
}
matcher.appendTail(result);
return result.toString().replace("\\$", "$").replace("\\\\", "\\");
}
/**
* perparedData
*
* @since ver1.00
*/
private void perparedData() {
Properties prop = new Properties();
// need to modify
String fileName = "C:\\classes\\MailResource.properties";//下面有
FileInputStream fis;
try {
fis = new FileInputStream(fileName);
prop.loadFromXML(fis);
} catch (InvalidPropertiesFormatException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new RuntimeException(e);
}
source = new StringBuilder().append(prop.getProperty("issuePassword-content"));
}
/**
* test method
*
* @param args args
* @since ver1.00
*/
public static void main(String [] args) {
Replacement test = new Replacement();
test.perparedData();
Map<String, Object> params = new HashMap<String, Object>();
params.put("$user_name", "challengehope");
params.put("$temp_password", "1234");
params.put("$temp_password_expiration_date", "2007/08/11");
params.put("$system_name", "Test");
params.put("$system_url", "Http://it_pub:8080/index.do");
System.out.println(test.getMessage(source.toString(), params));
}
}
MailResource.properties
//
<?xml version="1.0" encoding="Windows-31J"?>
<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
<properties>
<comment>Mail Properties</comment>
<entry key="issuePassword-subject"><![CDATA[
($system_name)注册会员登录账号
]]></entry>
<entry key="issuePassword-content"><![CDATA[
亲爱的会员：您好！
现在您已经成功地注册了，账号如下：
您的注册用户名：$user_name
您的登录密码是：$temp_password
您的密码的有效期限：$temp_password_expiration_date
现在您可以使用这个账号在$system_name登录了！
如果您是刚刚注册，请先了解本站：$system_url
上面的邮件是自动的送信，请不要回复。
$system_name
$system_url
]]></entry>
</properties>
如有问题请及时联系QQ:573322952
mail：hufeng@neusoft.com
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