Java中如何转义HTML符号呢?

使用 Apache Commons Lang 中的 
   StringEscapeUtils方法即可对html字符进行转移

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);

//version 3

import static org.apache.commons.lang3.StringEscapeUtils.escapeHtml4;
// ...
String escaped = escapeHtml4(source);