WEB工具类

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我是靠谱客的博主机智路人，最近开发中收集的这篇文章主要介绍WEB工具类，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述


1 import java.io.UnsupportedEncodingException;

2 import java.net.URLDecoder;

3 import java.net.URLEncoder;

4 import java.nio.charset.Charset;

5 import java.util.HashMap;

6 import java.util.Map;

7

8 import javax.servlet.http.Cookie;

9 import javax.servlet.http.HttpServletRequest;
 10 import javax.servlet.http.HttpServletResponse;
 11
 12 import org.apache.commons.lang.StringUtils;
 13 import org.springframework.util.Assert;
 14
 15 import com.qbskj.project.common.Setting;
 16
 17 /**
 18  * Utils - Web
 19  *
 20
*/
 21 public final class WebUtils {
 22
 23
/**
 24 
* 不可实例化
 25
*/
 26
private WebUtils() {
 27 
}
 28
 29
/**
 30 
* 添加cookie
 31 
*
 32 
* @param request
 33 
*
HttpServletRequest
 34 
* @param response
 35 
*
HttpServletResponse
 36 
* @param name
 37 
*
cookie名称
 38 
* @param value
 39 
*
cookie值
 40 
* @param maxAge
 41 
*
有效期(单位: 秒)
 42 
* @param path
 43 
*
路径
 44 
* @param domain
 45 
*
域
 46 
* @param secure
 47 
*
是否启用加密
 48
*/
 49
public static void addCookie(HttpServletRequest request, HttpServletResponse response, String name, String value,
 50 
Integer maxAge, String path, String domain, Boolean secure) {
 51 
Assert.notNull(request);
 52 
Assert.notNull(response);
 53 
Assert.hasText(name);
 54
try {
 55
name = URLEncoder.encode(name, "UTF-8");
 56
value = URLEncoder.encode(value, "UTF-8");
 57
Cookie cookie = new Cookie(name, value);
 58
if (maxAge != null) {
 59 
cookie.setMaxAge(maxAge);
 60 
}
 61
if (StringUtils.isNotEmpty(path)) {
 62 
cookie.setPath(path);
 63 
}
 64
if (StringUtils.isNotEmpty(domain)) {
 65 
cookie.setDomain(domain);
 66 
}
 67
if (secure != null) {
 68 
cookie.setSecure(secure);
 69 
}
 70 
response.addCookie(cookie);
 71
} catch (UnsupportedEncodingException e) {
 72 
e.printStackTrace();
 73 
}
 74 
}
 75
 76
/**
 77 
* 添加cookie
 78 
*
 79 
* @param request
 80 
*
HttpServletRequest
 81 
* @param response
 82 
*
HttpServletResponse
 83 
* @param name
 84 
*
cookie名称
 85 
* @param value
 86 
*
cookie值
 87 
* @param maxAge
 88 
*
有效期(单位: 秒)
 89
*/
 90
public static void addCookie(HttpServletRequest request, HttpServletResponse response, String name, String value,
 91 
Integer maxAge) {
 92
Setting setting = SettingUtils.get();
 93
addCookie(request, response, name, value, maxAge, setting.getCookiePath(), setting.getCookieDomain(), null);
 94 
}
 95
 96
/**
 97 
* 添加cookie
 98 
*
 99 
* @param request
100 
*
HttpServletRequest
101 
* @param response
102 
*
HttpServletResponse
103 
* @param name
104 
*
cookie名称
105 
* @param value
106 
*
cookie值
107
*/
108
public static void addCookie(HttpServletRequest request, HttpServletResponse response, String name, String value) {
109
Setting setting = SettingUtils.get();
110
addCookie(request, response, name, value, null, setting.getCookiePath(), setting.getCookieDomain(), null);
111 
}
112
113
/**
114 
* 获取cookie
115 
*
116 
* @param request
117 
*
HttpServletRequest
118 
* @param name
119 
*
cookie名称
120 
* @return 若不存在则返回null
121
*/
122
public static String getCookie(HttpServletRequest request, String name) {
123 
Assert.notNull(request);
124 
Assert.hasText(name);
125
Cookie[] cookies = request.getCookies();
126
if (cookies != null) {
127
try {
128
name = URLEncoder.encode(name, "UTF-8");
129
for (Cookie cookie : cookies) {
130
if (name.equals(cookie.getName())) {
131
return URLDecoder.decode(cookie.getValue(), "UTF-8");
132 
}
133 
}
134
} catch (UnsupportedEncodingException e) {
135 
e.printStackTrace();
136 
}
137 
}
138
return null;
139 
}
140
141
/**
142 
* 移除cookie
143 
*
144 
* @param request
145 
*
HttpServletRequest
146 
* @param response
147 
*
HttpServletResponse
148 
* @param name
149 
*
cookie名称
150 
* @param path
151 
*
路径
152 
* @param domain
153 
*
域
154
*/
155
public static void removeCookie(HttpServletRequest request, HttpServletResponse response, String name, String path,
156 
String domain) {
157 
Assert.notNull(request);
158 
Assert.notNull(response);
159 
Assert.hasText(name);
160
try {
161
name = URLEncoder.encode(name, "UTF-8");
162
Cookie cookie = new Cookie(name, null);
163
cookie.setMaxAge(0);
164
if (StringUtils.isNotEmpty(path)) {
165 
cookie.setPath(path);
166 
}
167
if (StringUtils.isNotEmpty(domain)) {
168 
cookie.setDomain(domain);
169 
}
170 
response.addCookie(cookie);
171
} catch (UnsupportedEncodingException e) {
172 
e.printStackTrace();
173 
}
174 
}
175
176
/**
177 
* 移除cookie
178 
*
179 
* @param request
180 
*
HttpServletRequest
181 
* @param response
182 
*
HttpServletResponse
183 
* @param name
184 
*
cookie名称
185
*/
186
public static void removeCookie(HttpServletRequest request, HttpServletResponse response, String name) {
187
Setting setting = SettingUtils.get();
188 
removeCookie(request, response, name, setting.getCookiePath(), setting.getCookieDomain());
189 
}
190
191
/**
192 
* 获取参数
193 
*
194 
* @param queryString
195 
*
查询字符串
196 
* @param encoding
197 
*
编码格式
198 
* @param name
199 
*
参数名称
200 
* @return 参数
201
*/
202
public static String getParameter(String queryString, String encoding, String name) {
203
String[] parameterValues = getParameterMap(queryString, encoding).get(name);
204
return parameterValues != null && parameterValues.length > 0 ? parameterValues[0] : null;
205 
}
206
207
/**
208 
* 获取参数
209 
*
210 
* @param queryString
211 
*
查询字符串
212 
* @param encoding
213 
*
编码格式
214 
* @param name
215 
*
参数名称
216 
* @return 参数
217
*/
218
public static String[] getParameterValues(String queryString, String encoding, String name) {
219
return getParameterMap(queryString, encoding).get(name);
220 
}
221
222
/**
223 
* 获取参数
224 
*
225 
* @param queryString
226 
*
查询字符串
227 
* @param encoding
228 
*
编码格式
229 
* @return 参数
230
*/
231
public static Map<String, String[]> getParameterMap(String queryString, String encoding) {
232
Map<String, String[]> parameterMap = new HashMap<String, String[]>();
233
Charset charset = Charset.forName(encoding);
234
if (StringUtils.isNotEmpty(queryString)) {
235
byte[] bytes = queryString.getBytes(charset);
236
if (bytes != null && bytes.length > 0) {
237
int ix = 0;
238
int ox = 0;
239
String key = null;
240
String value = null;
241
while (ix < bytes.length) {
242
byte c = bytes[ix++];
243
switch ((char) c) {
244
case '&':
245
value = new String(bytes, 0, ox, charset);
246
if (key != null) {
247 
putMapEntry(parameterMap, key, value);
248
key = null;
249 
}
250
ox = 0;
251
break;
252
case '=':
253
if (key == null) {
254
key = new String(bytes, 0, ox, charset);
255
ox = 0;
256
} else {
257
bytes[ox++] = c;
258 
}
259
break;
260
case '+':
261
bytes[ox++] = (byte) ' ';
262
break;
263
case '%':
264
bytes[ox++] = (byte) ((convertHexDigit(bytes[ix++]) << 4) + convertHexDigit(bytes[ix++]));
265
break;
266
default:
267
bytes[ox++] = c;
268 
}
269 
}
270
if (key != null) {
271
value = new String(bytes, 0, ox, charset);
272 
putMapEntry(parameterMap, key, value);
273 
}
274 
}
275 
}
276
return parameterMap;
277 
}
278
279
private static void putMapEntry(Map<String, String[]> map, String name, String value) {
280
String[] newValues = null;
281
String[] oldValues = map.get(name);
282
if (oldValues == null) {
283
newValues = new String[] { value };
284
} else {
285
newValues = new String[oldValues.length + 1];
286
System.arraycopy(oldValues, 0, newValues, 0, oldValues.length);
287
newValues[oldValues.length] = value;
288 
}
289 
map.put(name, newValues);
290 
}
291
292
private static byte convertHexDigit(byte b) {
293
if ((b >= '0') && (b <= '9')) {
294
return (byte) (b - '0');
295 
}
296
if ((b >= 'a') && (b <= 'f')) {
297
return (byte) (b - 'a' + 10);
298 
}
299
if ((b >= 'A') && (b <= 'F')) {
300
return (byte) (b - 'A' + 10);
301 
}
302
throw new IllegalArgumentException();
303 
}
304
305 }