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WEB工具类
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import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.Map; import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import org.apache.commons.lang.StringUtils;
import org.springframework.util.Assert; import com.qbskj.project.common.Setting; /**
* Utils - Web
*
*/
public final class WebUtils { /**
* 不可实例化
*/
private WebUtils() {
} /**
* 添加cookie
*
* @param request
* HttpServletRequest
* @param response
* HttpServletResponse
* @param name
* cookie名称
* @param value
* cookie值
* @param maxAge
* 有效期(单位: 秒)
* @param path
* 路径
* @param domain
* 域
* @param secure
* 是否启用加密
*/
public static void addCookie(HttpServletRequest request, HttpServletResponse response, String name, String value,
Integer maxAge, String path, String domain, Boolean secure) {
Assert.notNull(request);
Assert.notNull(response);
Assert.hasText(name);
try {
name = URLEncoder.encode(name, "UTF-8");
value = URLEncoder.encode(value, "UTF-8");
Cookie cookie = new Cookie(name, value);
if (maxAge != null) {
cookie.setMaxAge(maxAge);
}
if (StringUtils.isNotEmpty(path)) {
cookie.setPath(path);
}
if (StringUtils.isNotEmpty(domain)) {
cookie.setDomain(domain);
}
if (secure != null) {
cookie.setSecure(secure);
}
response.addCookie(cookie);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
} /**
* 添加cookie
*
* @param request
* HttpServletRequest
* @param response
* HttpServletResponse
* @param name
* cookie名称
* @param value
* cookie值
* @param maxAge
* 有效期(单位: 秒)
*/
public static void addCookie(HttpServletRequest request, HttpServletResponse response, String name, String value,
Integer maxAge) {
Setting setting = SettingUtils.get();
addCookie(request, response, name, value, maxAge, setting.getCookiePath(), setting.getCookieDomain(), null);
} /**
* 添加cookie
*
* @param request
* HttpServletRequest
* @param response
* HttpServletResponse
* @param name
* cookie名称
* @param value
* cookie值
*/
public static void addCookie(HttpServletRequest request, HttpServletResponse response, String name, String value) {
Setting setting = SettingUtils.get();
addCookie(request, response, name, value, null, setting.getCookiePath(), setting.getCookieDomain(), null);
} /**
* 获取cookie
*
* @param request
* HttpServletRequest
* @param name
* cookie名称
* @return 若不存在则返回null
*/
public static String getCookie(HttpServletRequest request, String name) {
Assert.notNull(request);
Assert.hasText(name);
Cookie[] cookies = request.getCookies();
if (cookies != null) {
try {
name = URLEncoder.encode(name, "UTF-8");
for (Cookie cookie : cookies) {
if (name.equals(cookie.getName())) {
return URLDecoder.decode(cookie.getValue(), "UTF-8");
}
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
return null;
} /**
* 移除cookie
*
* @param request
* HttpServletRequest
* @param response
* HttpServletResponse
* @param name
* cookie名称
* @param path
* 路径
* @param domain
* 域
*/
public static void removeCookie(HttpServletRequest request, HttpServletResponse response, String name, String path,
String domain) {
Assert.notNull(request);
Assert.notNull(response);
Assert.hasText(name);
try {
name = URLEncoder.encode(name, "UTF-8");
Cookie cookie = new Cookie(name, null);
cookie.setMaxAge(0);
if (StringUtils.isNotEmpty(path)) {
cookie.setPath(path);
}
if (StringUtils.isNotEmpty(domain)) {
cookie.setDomain(domain);
}
response.addCookie(cookie);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
} /**
* 移除cookie
*
* @param request
* HttpServletRequest
* @param response
* HttpServletResponse
* @param name
* cookie名称
*/
public static void removeCookie(HttpServletRequest request, HttpServletResponse response, String name) {
Setting setting = SettingUtils.get();
removeCookie(request, response, name, setting.getCookiePath(), setting.getCookieDomain());
} /**
* 获取参数
*
* @param queryString
* 查询字符串
* @param encoding
* 编码格式
* @param name
* 参数名称
* @return 参数
*/
public static String getParameter(String queryString, String encoding, String name) {
String[] parameterValues = getParameterMap(queryString, encoding).get(name);
return parameterValues != null && parameterValues.length > 0 ? parameterValues[0] : null;
} /**
* 获取参数
*
* @param queryString
* 查询字符串
* @param encoding
* 编码格式
* @param name
* 参数名称
* @return 参数
*/
public static String[] getParameterValues(String queryString, String encoding, String name) {
return getParameterMap(queryString, encoding).get(name);
} /**
* 获取参数
*
* @param queryString
* 查询字符串
* @param encoding
* 编码格式
* @return 参数
*/
public static Map<String, String[]> getParameterMap(String queryString, String encoding) {
Map<String, String[]> parameterMap = new HashMap<String, String[]>();
Charset charset = Charset.forName(encoding);
if (StringUtils.isNotEmpty(queryString)) {
byte[] bytes = queryString.getBytes(charset);
if (bytes != null && bytes.length > 0) {
int ix = 0;
int ox = 0;
String key = null;
String value = null;
while (ix < bytes.length) {
byte c = bytes[ix++];
switch ((char) c) {
case '&':
value = new String(bytes, 0, ox, charset);
if (key != null) {
putMapEntry(parameterMap, key, value);
key = null;
}
ox = 0;
break;
case '=':
if (key == null) {
key = new String(bytes, 0, ox, charset);
ox = 0;
} else {
bytes[ox++] = c;
}
break;
case '+':
bytes[ox++] = (byte) ' ';
break;
case '%':
bytes[ox++] = (byte) ((convertHexDigit(bytes[ix++]) << 4) + convertHexDigit(bytes[ix++]));
break;
default:
bytes[ox++] = c;
}
}
if (key != null) {
value = new String(bytes, 0, ox, charset);
putMapEntry(parameterMap, key, value);
}
}
}
return parameterMap;
} private static void putMapEntry(Map<String, String[]> map, String name, String value) {
String[] newValues = null;
String[] oldValues = map.get(name);
if (oldValues == null) {
newValues = new String[] { value };
} else {
newValues = new String[oldValues.length + 1];
System.arraycopy(oldValues, 0, newValues, 0, oldValues.length);
newValues[oldValues.length] = value;
}
map.put(name, newValues);
} private static byte convertHexDigit(byte b) {
if ((b >= '0') && (b <= '9')) {
return (byte) (b - '0');
}
if ((b >= 'a') && (b <= 'f')) {
return (byte) (b - 'a' + 10);
}
if ((b >= 'A') && (b <= 'F')) {
return (byte) (b - 'A' + 10);
}
throw new IllegalArgumentException();
} }
