防止javascript 注入解方法

??? ??? //防止javascript 注入：
??? ??? String strings = "<java>test</java>";
??? ??? System.out.println(strings.replace("<", "<").replace(">", ">"));

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public class StringUtil {
??? public static String getClassShortNameByEntity(Object entity) {
??? ??? String classPackage = entity.getClass().toString();
??? ??? return classPackage.substring(classPackage.lastIndexOf(".") + 1);
??? }
??? public static String getHtmlIncodeByString(String str){
??? ??? if(null!=str && !"".equals(str)){
??? ??? ??? return str.trim().replace("<", "<").replace(">", ">");
??? ??? }
??? ??? return null;
??? }
}