如何将这个 Javascript 代码转换为 Java ？

[andybest]

一个 Javascript 代码的函数，其中替换的正则是 JS 语法，如何转换为 Java 语法代码？

function HTML2UBB(str) {
str = str.replace(/\r/g,"");
str = str.replace(/on(load|click|dbclick|mouseover|mousedown|mouseup)="[^"]+"/ig,"");
str = str.replace(/<script[^>]*?>([\w\W]*?)<\/script>/ig,"");
str = str.replace(/<p align=(.*)>(.*?)<\/p>/ig,"[$1]$2[\/$1]");
str = str.replace(/<a[^>]+href="([^"]+)"[^>]*>(.*?)<\/a>/ig,"[url=$1]$2[/url]");

str = str.replace(/<font[^>]+color=([^ >]+)[^>]*>(.*?)<\/font>/ig,"[color=$1]$2[/color]");
str = str.replace(/<img[^>]+src="([^"]+)"[^>]*>/ig,"[img]$1[/img]");

str = str.replace(/&nbsp;/ig," ");
str = str.replace(/\n/g," ");
str = str.replace(/<\/p>/ig,"\n");
str = str.replace(/<br[^>]*>/ig,"\n");
str = str.replace(/<([\/]?)b>/ig,"[$1b]");
str = str.replace(/<([\/]?)strong>/ig,"[$1b]");
str = str.replace(/<([\/]?)u>/ig,"[$1u]");
str = str.replace(/<([\/]?)i>/ig,"[$1i]");
str = str.replace(/<([\/]?)em>/ig,"[$1i]");
str = str.replace(/<([\/]?)center>/ig,"[$1center]");


str = str.replace(/<([\/]?)pre>/ig, "[$1code]");
str = str.replace(/<([\/]?)blockquote>/ig, "[$1quote]");

//if the text mark as del, just remove it
str = str.replace(/<del[^>]*>.*<\/del>/ig, "");

str = str.replace(/&amp;/g,"&");
str = str.replace(/ +/g," ");
str = str.replace(/\n /g,"\n");
str = str.replace(/ \n/g,"\n");
str = str.replace(/&quot;/g,"\"");
str = str.replace(/&lt;/g,"<");
str = str.replace(/&gt;/g,">");

str = str.replace(/<[^>]*?>/g,"");
str = str.replace(/\[url=([^\]]+)\]\n(\[img\]\1\[\/img\])\n\[\/url\]/g,"$2");

return str;
}

[tonghuashuai]

扔到文本编辑器里查找替换就行吧，比如所有 replace 替换成 replaceAll

[andybest]

@tonghuashuai 谢谢，主要是正则部分，比如： str.replace(/<\/p>/ig,"\n"); 这个怎么替换成 Java 语法？

[jsonline]

这代码写的好那啥

[PhilCai]

@andybest Java有专门正则的库，花几分钟看看就好了

[tonghuashuai]

@andybest java 中 replaceAll 的第一个参数正则表达式就是字符串，比如"<[^>]*?>"，所以剩下的就好说了，举例：
js 代码：
str = str.replace(/<[^>]*?>/g,"");

java 代码：
String str = str.replaceAll("<[^>]*?>", "")

将 /正则表达式/g 替换为 “正则表达式”，也就是将 / 和 /g 替换成 “

注意默写符号的转义