Fixed #3. Added support for htmlEncode function

src/main/java/strman/Strman.java

@@ -897,6 +897,17 @@ public abstract class Strman {
         return Arrays.stream(entities).map(e -> HtmlEntities.decodedEntities.get(e)).collect(joining());
     }
 
+    /**
+     * Convert all applicable characters to HTML entities.
+     *
+     * @param html The HTML to encode
+     * @return The encoded data
+     */
+    public static String htmlEncode(final String html) {
+        validate(html, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
+        return html.chars().mapToObj(c -> "\\u" + String.format("%04x", c).toUpperCase()).map(e -> HtmlEntities.encodedEntities.get(e)).collect(joining());
+    }
+
     public static String decode(final String value, final int digits, final int radix) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         return Arrays

src/test/java/strman/StrmanTest.java

@@ -654,4 +654,13 @@ public class StrmanTest {
         assertThat(htmlDecode("Ж"), equalTo("Ж"));
         assertThat(htmlDecode("┐"), equalTo("┐"));
     }
+
+    @Test
+    public void htmlEncode_shouldBeEncodedToHtmlEntities() throws Exception {
+        assertThat(htmlEncode("á"), equalTo("á"));
+        assertThat(htmlEncode("áéíóú"), equalTo("áéíóú"));
+        assertThat(htmlEncode("Ш"), equalTo("Ш"));
+        assertThat(htmlEncode("Ж"), equalTo("Ж"));
+        assertThat(htmlEncode("┐"), equalTo("┐"));
+    }
 }