common_helper/src/main/java/com/xiongyingqi/util/StringHelper.java
public static String line() {
        String lineSeparator = java.security.AccessController.doPrivileged(
                new sun.security.action.GetPropertyAction("line.separator"));
//		String lineSeparator = System.getProperty("line.separator");
        return lineSeparator;
    }
public static String line() {
        String lineSeparator = java.security.AccessController.doPrivileged(
                new sun.security.action.GetPropertyAction("line.separator"));
//		String lineSeparator = System.getProperty("line.separator");
        return lineSeparator;
    }
换行符 <br>
2013-8-14 下午1:20:06

@return