[英]Handling Strings with special characters in Java
我正在实现一个字符串匹配算法,需要使用特殊字符处理字符串。 在匹配的一方面,字符串是用Python编写的,然后通过JAVA。 另一方面,他们是由另一个环境准备的。 现在我在我的Java程序中匹配它们(从JSON输入中检索的字符串)。
虽然处理了一些角色,但我处理许多其他角色时遇到了问题。
例如,我为此获得了一个MATCH (两者都在我的控制台上显示为>> AS IT COMES CRUMBLING
):
"text":"\u003e\u003e AS IT COMES CRUMBLING"
"caption":">> AS IT COMES CRUMBLING"
但这些显示为非匹配 :
"text":"What if you had fewer headaches\nand migraines a month?"
"text":"What if you had fewer headaches\\nand migraines a month?"
或者这一个:
"text":"Effects of BOTOX® may spread"
"text":"Effects of BOTOX\\xc2\\xae may spread"
或这个:
"text":"Let's also rethink how\nwe care for ourselves."
"text":"Let'\\xe2\\x80\\x99s also rethink how\\nwe care for ourselves."
在我的代码中,我使用JSONPath
从两端读取JSON
输入,将它们放在ArrayList
,然后将其与列表中的所有项进行比较。
boolean found=false;
myText foundText = null;
for (int i = 0; i < scheduledText.size(); i++) {
if(current.text.equals(scheduledText.get(i).text)) {
found = true;
foundText =scheduledText.get(i);
break;
}
}
if(found)
//print MATCH
else
//print NON_MATCH
我很沮丧。 我该怎么办? 我怎么处理这些?
因此,对于我提出的解决方案,您将在Java代码中使用函数,如下所示。
private static String cleanTextContent(String text)
{
// strips off all non-ASCII characters
text = text.replaceAll("[^\\x00-\\x7F]", "");
// erases all the ASCII control characters
text = text.replaceAll("[\\p{Cntrl}&&[^\r\n\t]]", "");
// removes non-printable characters from Unicode
text = text.replaceAll("\\p{C}", "");
text = text.replaceAll("[^ -~]","");
text = text.replaceAll("[^\\p{ASCII}]", "");
text = text.replaceAll("\\\\x\\p{XDigit}{2}", "");
text = text.replaceAll("\\n","");
text = text.replaceAll("[^\\x20-\\x7e]", "");
return text.trim();
}
一旦调用此函数,您就可以使用Apache Commons lib将字符串转换为md5 hash这样的东西。
private static String hashMyString(String text) {
String hashText= text;
String md5Hex = DigestUtils
.md5Hex(hashText).toUpperCase();
return md5Hex;
}
最后只比较主程序中的两个哈希值。
编辑:如果使用maven这是库,基本上使DigestUtils工作。
<!-- https://mvnrepository.com/artifact/commons-codec/commons-codec -->
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.9</version>
</dependency>
编辑:我的完整测试代码为String。
public class App
{
public static void main( String[] args ) throws UnsupportedEncodingException
{
String sideOneString = "Effects of BOTOX® may spread";
String sideTwoString = "Effects of BOTOX\\xc2\\xae may spread";
String sideThreeString = "BOTOX injections take about\n15 mins";
String sideFourString = "BOTOX\\xc2\\xae injections take about\\n15 mins";
System.out.println( hashMyString(cleanTextContent(sideOneString)));
System.out.println( hashMyString(cleanTextContent(sideTwoString)));
System.out.println( hashMyString(cleanTextContent(sideThreeString)));
System.out.println( hashMyString(cleanTextContent(sideFourString)));
}
private static String hashMyString(String text) {
String hashText= text;
String md5Hex = DigestUtils.md5Hex(hashText).toUpperCase();
//System.out.println(md5Hex);
return md5Hex;
}
private static String cleanTextContent(String text)
{
// strips off all non-ASCII characters
text = text.replaceAll("[^\\x00-\\x7F]", "");
// erases all the ASCII control characters
text = text.replaceAll("[\\p{Cntrl}&&[^\r\n\t]]", "");
// removes non-printable characters from Unicode
text = text.replaceAll("\\p{C}", "");
text = text.replaceAll("[^ -~]","");
text = text.replaceAll("[^\\p{ASCII}]", "");
text = text.replaceAll("\\\\x\\p{XDigit}{2}", "");
text = text.replaceAll("\\\\n","");
text = text.replaceAll("[^\\x20-\\x7e]", "");
return text.trim();
}
}
结果:
F928A529F380EB59575AC8A175FDFE79
F928A529F380EB59575AC8A175FDFE79
B4740299C53E18C9ECAF18BA35151D43
B4740299C53E18C9ECAF18BA35151D43
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