在纯Java代码中输出HTML时,是否有一种推荐的方法来转义<,>,"和&字符?(除了手动执行以下操作之外)。
String source = "The less than sign (<) and ampersand (&) must be escaped before using them in HTML";
String escaped = source.replace("<", "<").replace("&", "&"); // ...
在纯Java代码中输出HTML时,是否有一种推荐的方法来转义<,>,"和&字符?(除了手动执行以下操作之外)。
String source = "The less than sign (<) and ampersand (&) must be escaped before using them in HTML";
String escaped = source.replace("<", "<").replace("&", "&"); // ...
当前回答
有一个更新版本的Apache Commons Lang库,它使用了一个不同的包名(org.apache.commons.lang3)。StringEscapeUtils现在有不同的静态方法来转义不同类型的文档(http://commons.apache.org/proper/commons-lang/javadocs/api-3.0/index.html)。转义HTML 4.0版本的字符串:
import static org.apache.commons.lang3.StringEscapeUtils.escapeHtml4;
String output = escapeHtml4("The less than sign (<) and ampersand (&) must be escaped before using them in HTML");
其他回答
出于某些目的,htmltils:
import org.springframework.web.util.HtmlUtils;
[...]
HtmlUtils.htmlEscapeDecimal("&"); //gives &
HtmlUtils.htmlEscape("&"); //gives &
简单的方法:
public static String escapeHTML(String s) {
StringBuilder out = new StringBuilder(Math.max(16, s.length()));
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (c > 127 || c == '"' || c == '\'' || c == '<' || c == '>' || c == '&') {
out.append("&#");
out.append((int) c);
out.append(';');
} else {
out.append(c);
}
}
return out.toString();
}
基于https://stackoverflow.com/a/8838023/1199155(放大器不在那里)。根据http://www.w3.org/TR/html4/sgml/entities.html的说法,if子句中选中的四个字符是唯一低于128的字符
Apache Commons的替代方案:使用Spring的htmltils。htmlEscape(字符串输入)方法。
StringEscapeUtils from Apache Commons Lang:
import static org.apache.commons.lang.StringEscapeUtils.escapeHtml;
// ...
String source = "The less than sign (<) and ampersand (&) must be escaped before using them in HTML";
String escaped = escapeHtml(source);
版本3:
import static org.apache.commons.lang3.StringEscapeUtils.escapeHtml4;
// ...
String escaped = escapeHtml4(source);
stringescapeutils现在已弃用。您现在必须使用org.apache.commons.text.StringEscapeUtils by
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-text</artifactId>
<version>${commons.text.version}</version>
</dependency>