|
1
16
17 package org.springframework.web.util;
18
19 import org.springframework.util.StringUtils;
20
21
42 public abstract class HtmlUtils {
43
44
47 private static final HtmlCharacterEntityReferences characterEntityReferences =
48 new HtmlCharacterEntityReferences();
49
50 private static final String  PARAMETER_DELIMETER = "&";
51
52
53
65 public static String htmlEscape(String input) {
66 if (input == null) {
67 return null;
68 }
69 StringBuffer escaped = new StringBuffer (input.length() * 2);
70 for (int i = 0; i < input.length(); i++) {
71 char character = input.charAt(i);
72 String reference = characterEntityReferences.convertToReference(character);
73 if (reference != null) {
74 escaped.append(reference);
75 }
76 else {
77 escaped.append(character);
78 }
79 }
80 return escaped.toString();
81 }
82
83
95 public static String htmlEscapeDecimal(String input) {
96 if (input == null) {
97 return null;
98 }
99 StringBuffer escaped = new StringBuffer (input.length() * 2);
100 for (int i = 0; i < input.length(); i++) {
101 char character = input.charAt(i);
102 if (characterEntityReferences.isMappedToReference(character)) {
103 escaped.append(HtmlCharacterEntityReferences.DECIMAL_REFERENCE_START);
104 escaped.append((int) character);
105 escaped.append(HtmlCharacterEntityReferences.REFERENCE_END);
106 }
107 else {
108 escaped.append(character);
109 }
110 }
111 return escaped.toString();
112 }
113
114
123 public static String htmlEscapeQueryStringParameters(String queryString) {
124 if (!StringUtils.hasText(queryString)) {
125 return "";
126 }
127 StringBuffer buffer = new StringBuffer (queryString.length() * 2);
128 String [] parameters = StringUtils.tokenizeToStringArray(queryString, PARAMETER_DELIMETER);
129 if (parameters.length > 0) {
130 for (int i = 0; i < parameters.length; ++i) {
131 String parameter = parameters[i];
132 buffer.append(HtmlUtils.htmlEscape(parameter));
133 if (i < parameters.length - 1) {
134 buffer.append(PARAMETER_DELIMETER);
135 }
136 }
137 }
138 return buffer.toString();
139 }
140
141
153 public static String htmlEscapeHex(String input) {
154 if (input == null) {
155 return null;
156 }
157 StringBuffer escaped = new StringBuffer (input.length() * 2);
158 for (int i = 0; i < input.length(); i++) {
159 char character = input.charAt(i);
160 if (characterEntityReferences.isMappedToReference(character)) {
161 escaped.append(HtmlCharacterEntityReferences.HEX_REFERENCE_START);
162 escaped.append(Integer.toString((int) character, 16));
163 escaped.append(HtmlCharacterEntityReferences.REFERENCE_END);
164 }
165 else {
166 escaped.append(character);
167 }
168 }
169 return escaped.toString();
170 }
171
172
191 public static String htmlUnescape(String input) {
192 if (input == null) {
193 return null;
194 }
195 return new HtmlCharacterEntityDecoder(characterEntityReferences, input).decode();
196 }
197
198 }
199 |
Popular Tags |
Java API By Example, From Geeks To Geeks.