liferay笑傲江湖-API之参数的工具类(ParamUtil)
2015-09-16 10:17
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public class ParamUtil { 036 037 public static boolean get( 038 HttpServletRequest request, String param, boolean defaultValue) { 039 040 return GetterUtil.get(request.getParameter(param), defaultValue); 041 } 042 043 public static Date get( 044 HttpServletRequest request, String param, DateFormat dateFormat, 045 Date defaultValue) { 046 047 return GetterUtil.get( 048 request.getParameter(param), dateFormat, defaultValue); 049 } 050 051 public static double get( 052 HttpServletRequest request, String param, double defaultValue) { 053 054 return GetterUtil.get(request.getParameter(param), defaultValue); 055 } 056 057 public static float get( 058 HttpServletRequest request, String param, float defaultValue) { 059 060 return GetterUtil.get(request.getParameter(param), defaultValue); 061 } 062 063 public static int get( 064 HttpServletRequest request, String param, int defaultValue) { 065 066 return GetterUtil.get(request.getParameter(param), defaultValue); 067 } 068 069 public static long get( 070 HttpServletRequest request, String param, long defaultValue) { 071 072 return GetterUtil.get(request.getParameter(param), defaultValue); 073 } 074 075 public static short get( 076 HttpServletRequest request, String param, short defaultValue) { 077 078 return GetterUtil.get(request.getParameter(param), defaultValue); 079 } 080 081 public static String get( 082 HttpServletRequest request, String param, String defaultValue) { 083 084 String returnValue = 085 GetterUtil.get(request.getParameter(param), defaultValue); 086 087 if (returnValue != null) { 088 return returnValue.trim(); 089 } 090 091 return null; 092 } 093 094 public static boolean get( 095 PortletRequest portletRequest, String param, boolean defaultValue) { 096 097 return GetterUtil.get(portletRequest.getParameter(param), defaultValue); 098 } 099 100 public static Date get( 101 PortletRequest portletRequest, String param, DateFormat dateFormat, 102 Date defaultValue) { 103 104 return GetterUtil.get( 105 portletRequest.getParameter(param), dateFormat, defaultValue); 106 } 107 108 public static double get( 109 PortletRequest portletRequest, String param, double defaultValue) { 110 111 return GetterUtil.get(portletRequest.getParameter(param), defaultValue); 112 } 113 114 public static float get( 115 PortletRequest portletRequest, String param, float defaultValue) { 116 117 return GetterUtil.get(portletRequest.getParameter(param), defaultValue); 118 } 119 120 public static int get( 121 PortletRequest portletRequest, String param, int defaultValue) { 122 123 return GetterUtil.get(portletRequest.getParameter(param), defaultValue); 124 } 125 126 public static long get( 127 PortletRequest portletRequest, String param, long defaultValue) { 128 129 return GetterUtil.get(portletRequest.getParameter(param), defaultValue); 130 } 131 132 public static short get( 133 PortletRequest portletRequest, String param, short defaultValue) { 134 135 return GetterUtil.get(portletRequest.getParameter(param), defaultValue); 136 } 137 138 public static String get( 139 PortletRequest portletRequest, String param, String defaultValue) { 140 141 String returnValue = 142 GetterUtil.get(portletRequest.getParameter(param), defaultValue); 143 144 if (returnValue != null) { 145 return returnValue.trim(); 146 } 147 148 return null; 149 } 150 151 public static boolean get( 152 ServiceContext serviceContext, String param, boolean defaultValue) { 153 154 return GetterUtil.get(serviceContext.getAttribute(param), defaultValue); 155 } 156 157 public static Date get( 158 ServiceContext serviceContext, String param, DateFormat dateFormat, 159 Date defaultValue) { 160 161 return GetterUtil.get( 162 serviceContext.getAttribute(param), dateFormat, defaultValue); 163 } 164 165 public static double get( 166 ServiceContext serviceContext, String param, double defaultValue) { 167 168 return GetterUtil.get(serviceContext.getAttribute(param), defaultValue); 169 } 170 171 public static float get( 172 ServiceContext serviceContext, String param, float defaultValue) { 173 174 return GetterUtil.get(serviceContext.getAttribute(param), defaultValue); 175 } 176 177 public static int get( 178 ServiceContext serviceContext, String param, int defaultValue) { 179 180 return GetterUtil.get(serviceContext.getAttribute(param), defaultValue); 181 } 182 183 public static long get( 184 ServiceContext serviceContext, String param, long defaultValue) { 185 186 return GetterUtil.get(serviceContext.getAttribute(param), defaultValue); 187 } 188 189 public static short get( 190 ServiceContext serviceContext, String param, short defaultValue) { 191 192 return GetterUtil.get(serviceContext.getAttribute(param), defaultValue); 193 } 194 195 public static String get( 196 ServiceContext serviceContext, String param, String defaultValue) { 197 198 String returnValue = 199 GetterUtil.get(serviceContext.getAttribute(param), defaultValue); 200 201 if (returnValue != null) { 202 return returnValue.trim(); 203 } 204 205 return null; 206 } 207 208 public static boolean getBoolean(HttpServletRequest request, String param) { 209 return GetterUtil.getBoolean(request.getParameter(param)); 210 } 211 212 public static boolean getBoolean( 213 HttpServletRequest request, String param, boolean defaultValue) { 214 215 return get(request, param, defaultValue); 216 } 217 218 public static boolean getBoolean( 219 PortletRequest portletRequest, String param) { 220 221 return GetterUtil.getBoolean(portletRequest.getParameter(param)); 222 } 223 224 public static boolean getBoolean( 225 PortletRequest portletRequest, String param, boolean defaultValue) { 226 227 return get(portletRequest, param, defaultValue); 228 } 229 230 public static boolean getBoolean( 231 ServiceContext serviceContext, String param) { 232 233 return GetterUtil.getBoolean(serviceContext.getAttribute(param)); 234 } 235 236 public static boolean getBoolean( 237 ServiceContext serviceContext, String param, boolean defaultValue) { 238 239 return get(serviceContext, param, defaultValue); 240 } 241 242 public static boolean[] getBooleanValues( 243 HttpServletRequest request, String param) { 244 245 return getBooleanValues(request, param, new boolean[0]); 246 } 247 248 public static boolean[] getBooleanValues( 249 HttpServletRequest request, String param, boolean[] defaultValue) { 250 251 return GetterUtil.getBooleanValues( 252 request.getParameterValues(param), defaultValue); 253 } 254 255 public static boolean[] getBooleanValues( 256 PortletRequest portletRequest, String param) { 257 258 return getBooleanValues(portletRequest, param, new boolean[0]); 259 } 260 261 public static boolean[] getBooleanValues( 262 PortletRequest portletRequest, String param, boolean[] defaultValue) { 263 264 return GetterUtil.getBooleanValues( 265 portletRequest.getParameterValues(param), defaultValue); 266 } 267 268 public static boolean[] getBooleanValues( 269 ServiceContext serviceContext, String param) { 270 271 return getBooleanValues(serviceContext, param, new boolean[0]); 272 } 273 274 public static boolean[] getBooleanValues( 275 ServiceContext serviceContext, String param, boolean[] defaultValue) { 276 277 return GetterUtil.getBooleanValues( 278 serviceContext.getAttribute(param), defaultValue); 279 } 280 281 public static Date getDate( 282 HttpServletRequest request, String param, DateFormat dateFormat) { 283 284 return GetterUtil.getDate(request.getParameter(param), dateFormat); 285 } 286 287 public static Date getDate( 288 HttpServletRequest request, String param, DateFormat dateFormat, 289 Date defaultValue) { 290 291 return get(request, param, dateFormat, defaultValue); 292 } 293 294 public static Date getDate( 295 PortletRequest portletRequest, String param, DateFormat dateFormat) { 296 297 return GetterUtil.getDate( 298 portletRequest.getParameter(param), dateFormat); 299 } 300 301 public static Date getDate( 302 PortletRequest portletRequest, String param, DateFormat dateFormat, 303 Date defaultValue) { 304 305 return get(portletRequest, param, dateFormat, defaultValue); 306 } 307 308 public static Date getDate( 309 ServiceContext serviceContext, String param, DateFormat dateFormat) { 310 311 return GetterUtil.getDate( 312 serviceContext.getAttribute(param), dateFormat); 313 } 314 315 public static Date getDate( 316 ServiceContext serviceContext, String param, DateFormat dateFormat, 317 Date defaultValue) { 318 319 return get(serviceContext, param, dateFormat, defaultValue); 320 } 321 322 public static Date[] getDateValues( 323 HttpServletRequest request, String param, DateFormat dateFormat) { 324 325 return getDateValues(request, param, dateFormat, new Date[0]); 326 } 327 328 public static Date[] getDateValues( 329 HttpServletRequest request, String param, DateFormat dateFormat, 330 Date[] defaultValue) { 331 332 return GetterUtil.getDateValues( 333 request.getParameterValues(param), dateFormat, defaultValue); 334 } 335 336 public static Date[] getDateValues( 337 PortletRequest portletRequest, String param, DateFormat dateFormat) { 338 339 return getDateValues(portletRequest, param, dateFormat, new Date[0]); 340 } 341 342 public static Date[] getDateValues( 343 PortletRequest portletRequest, String param, DateFormat dateFormat, 344 Date[] defaultValue) { 345 346 return GetterUtil.getDateValues( 347 portletRequest.getParameterValues(param), dateFormat, defaultValue); 348 } 349 350 public static Date[] getDateValues( 351 ServiceContext serviceContext, String param, DateFormat dateFormat) { 352 353 return getDateValues(serviceContext, param, dateFormat, new Date[0]); 354 } 355 356 public static Date[] getDateValues( 357 ServiceContext serviceContext, String param, DateFormat dateFormat, 358 Date[] defaultValue) { 359 360 return GetterUtil.getDateValues( 361 serviceContext.getAttribute(param), dateFormat, defaultValue); 362 } 363 364 public static double getDouble(HttpServletRequest request, String param) { 365 return GetterUtil.getDouble(request.getParameter(param)); 366 } 367 368 public static double getDouble( 369 HttpServletRequest request, String param, double defaultValue) { 370 371 return get(request, param, defaultValue); 372 } 373 374 public static double getDouble( 375 PortletRequest portletRequest, String param) { 376 377 return GetterUtil.getDouble(portletRequest.getParameter(param)); 378 } 379 380 public static double getDouble( 381 PortletRequest portletRequest, String param, double defaultValue) { 382 383 return get(portletRequest, param, defaultValue); 384 } 385 386 public static double getDouble( 387 ServiceContext serviceContext, String param) { 388 389 return GetterUtil.getDouble(serviceContext.getAttribute(param)); 390 } 391 392 public static double getDouble( 393 ServiceContext serviceContext, String param, double defaultValue) { 394 395 return get(serviceContext, param, defaultValue); 396 } 397 398 public static double[] getDoubleValues( 399 HttpServletRequest request, String param) { 400 401 return getDoubleValues(request, param, new double[0]); 402 } 403 404 public static double[] getDoubleValues( 405 HttpServletRequest request, String param, double[] defaultValue) { 406 407 return GetterUtil.getDoubleValues( 408 request.getParameterValues(param), defaultValue); 409 } 410 411 public static double[] getDoubleValues( 412 PortletRequest portletRequest, String param) { 413 414 return getDoubleValues(portletRequest, param, new double[0]); 415 } 416 417 public static double[] getDoubleValues( 418 PortletRequest portletRequest, String param, double[] defaultValue) { 419 420 return GetterUtil.getDoubleValues( 421 portletRequest.getParameterValues(param), defaultValue); 422 } 423 424 public static double[] getDoubleValues( 425 ServiceContext serviceContext, String param) { 426 427 return getDoubleValues(serviceContext, param, new double[0]); 428 } 429 430 public static double[] getDoubleValues( 431 ServiceContext serviceContext, String param, double[] defaultValue) { 432 433 return GetterUtil.getDoubleValues( 434 serviceContext.getAttribute(param), defaultValue); 435 } 436 437 public static float getFloat(HttpServletRequest request, String param) { 438 return GetterUtil.getFloat(request.getParameter(param)); 439 } 440 441 public static float getFloat( 442 HttpServletRequest request, String param, float defaultValue) { 443 444 return get(request, param, defaultValue); 445 } 446 447 public static float getFloat(PortletRequest portletRequest, String param) { 448 return GetterUtil.getFloat(portletRequest.getParameter(param)); 449 } 450 451 public static float getFloat( 452 PortletRequest portletRequest, String param, float defaultValue) { 453 454 return get(portletRequest, param, defaultValue); 455 } 456 457 public static float getFloat(ServiceContext serviceContext, String param) { 458 return GetterUtil.getFloat(serviceContext.getAttribute(param)); 459 } 460 461 public static float getFloat( 462 ServiceContext serviceContext, String param, float defaultValue) { 463 464 return get(serviceContext, param, defaultValue); 465 } 466 467 public static float[] getFloatValues( 468 HttpServletRequest request, String param) { 469 470 return getFloatValues(request, param, new float[0]); 471 } 472 473 public static float[] getFloatValues( 474 HttpServletRequest request, String param, float[] defaultValue) { 475 476 return GetterUtil.getFloatValues( 477 request.getParameterValues(param), defaultValue); 478 } 479 480 public static float[] getFloatValues( 481 PortletRequest portletRequest, String param) { 482 483 return getFloatValues(portletRequest, param, new float[0]); 484 } 485 486 public static float[] getFloatValues( 487 PortletRequest portletRequest, String param, float[] defaultValue) { 488 489 return GetterUtil.getFloatValues( 490 portletRequest.getParameterValues(param), defaultValue); 491 } 492 493 public static float[] getFloatValues( 494 ServiceContext serviceContext, String param) { 495 496 return getFloatValues(serviceContext, param, new float[0]); 497 } 498 499 public static float[] getFloatValues( 500 ServiceContext serviceContext, String param, float[] defaultValue) { 501 502 return GetterUtil.getFloatValues( 503 serviceContext.getAttribute(param), defaultValue); 504 } 505 506 public static int getInteger(HttpServletRequest request, String param) { 507 return GetterUtil.getInteger(request.getParameter(param)); 508 } 509 510 public static int getInteger( 511 HttpServletRequest request, String param, int defaultValue) { 512 513 return get(request, param, defaultValue); 514 } 515 516 public static int getInteger(PortletRequest portletRequest, String param) { 517 return GetterUtil.getInteger(portletRequest.getParameter(param)); 518 } 519 520 public static int getInteger( 521 PortletRequest portletRequest, String param, int defaultValue) { 522 523 return get(portletRequest, param, defaultValue); 524 } 525 526 public static int getInteger(ServiceContext serviceContext, String param) { 527 return GetterUtil.getInteger(serviceContext.getAttribute(param)); 528 } 529 530 public static int getInteger( 531 ServiceContext serviceContext, String param, int defaultValue) { 532 533 return get(serviceContext, param, defaultValue); 534 } 535 536 public static int[] getIntegerValues( 537 HttpServletRequest request, String param) { 538 539 return getIntegerValues(request, param, new int[0]); 540 } 541 542 public static int[] getIntegerValues( 543 HttpServletRequest request, String param, int[] defaultValue) { 544 545 return GetterUtil.getIntegerValues( 546 request.getParameterValues(param), defaultValue); 547 } 548 549 public static int[] getIntegerValues( 550 PortletRequest portletRequest, String param) { 551 552 return getIntegerValues(portletRequest, param, new int[0]); 553 } 554 555 public static int[] getIntegerValues( 556 PortletRequest portletRequest, String param, int[] defaultValue) { 557 558 return GetterUtil.getIntegerValues( 559 portletRequest.getParameterValues(param), defaultValue); 560 } 561 562 public static int[] getIntegerValues( 563 ServiceContext serviceContext, String param) { 564 565 return getIntegerValues(serviceContext, param, new int[0]); 566 } 567 568 public static int[] getIntegerValues( 569 ServiceContext serviceContext, String param, int[] defaultValue) { 570 571 return GetterUtil.getIntegerValues( 572 serviceContext.getAttribute(param), defaultValue); 573 } 574 575 public static long getLong(HttpServletRequest request, String param) { 576 return GetterUtil.getLong(request.getParameter(param)); 577 } 578 579 public static long getLong( 580 HttpServletRequest request, String param, long defaultValue) { 581 582 return get(request, param, defaultValue); 583 } 584 585 public static long getLong(PortletRequest portletRequest, String param) { 586 return GetterUtil.getLong(portletRequest.getParameter(param)); 587 } 588 589 public static long getLong( 590 PortletRequest portletRequest, String param, long defaultValue) { 591 592 return get(portletRequest, param, defaultValue); 593 } 594 595 public static long getLong(ServiceContext serviceContext, String param) { 596 return GetterUtil.getLong(serviceContext.getAttribute(param)); 597 } 598 599 public static long getLong( 600 ServiceContext serviceContext, String param, long defaultValue) { 601 602 return get(serviceContext, param, defaultValue); 603 } 604 605 public static long[] getLongValues( 606 HttpServletRequest request, String param) { 607 608 return getLongValues(request, param, new long[0]); 609 } 610 611 public static long[] getLongValues( 612 HttpServletRequest request, String param, long[] defaultValue) { 613 614 return GetterUtil.getLongValues( 615 request.getParameterValues(param), defaultValue); 616 } 617 618 public static long[] getLongValues( 619 PortletRequest portletRequest, String param) { 620 621 return getLongValues(portletRequest, param, new long[0]); 622 } 623 624 public static long[] getLongValues( 625 PortletRequest portletRequest, String param, long[] defaultValue) { 626 627 return GetterUtil.getLongValues( 628 portletRequest.getParameterValues(param), defaultValue); 629 } 630 631 public static long[] getLongValues( 632 ServiceContext serviceContext, String param) { 633 634 return getLongValues(serviceContext, param, new long[0]); 635 } 636 637 public static long[] getLongValues( 638 ServiceContext serviceContext, String param, long[] defaultValue) { 639 640 return GetterUtil.getLongValues( 641 serviceContext.getAttribute(param), defaultValue); 642 } 643 644 public static short getShort(HttpServletRequest request, String param) { 645 return GetterUtil.getShort(request.getParameter(param)); 646 } 647 648 public static short getShort( 649 HttpServletRequest request, String param, short defaultValue) { 650 651 return get(request, param, defaultValue); 652 } 653 654 public static short getShort(PortletRequest portletRequest, String param) { 655 return GetterUtil.getShort(portletRequest.getParameter(param)); 656 } 657 658 public static short getShort( 659 PortletRequest portletRequest, String param, short defaultValue) { 660 661 return get(portletRequest, param, defaultValue); 662 } 663 664 public static short getShort(ServiceContext serviceContext, String param) { 665 return GetterUtil.getShort(serviceContext.getAttribute(param)); 666 } 667 668 public static short getShort( 669 ServiceContext serviceContext, String param, short defaultValue) { 670 671 return get(serviceContext, param, defaultValue); 672 } 673 674 public static short[] getShortValues( 675 HttpServletRequest request, String param) { 676 677 return getShortValues(request, param, new short[0]); 678 } 679 680 public static short[] getShortValues( 681 HttpServletRequest request, String param, short[] defaultValue) { 682 683 return GetterUtil.getShortValues( 684 request.getParameterValues(param), defaultValue); 685 } 686 687 public static short[] getShortValues( 688 PortletRequest portletRequest, String param) { 689 690 return getShortValues(portletRequest, param, new short[0]); 691 } 692 693 public static short[] getShortValues( 694 PortletRequest portletRequest, String param, short[] defaultValue) { 695 696 return GetterUtil.getShortValues( 697 portletRequest.getParameterValues(param), defaultValue); 698 } 699 700 public static short[] getShortValues( 701 ServiceContext serviceContext, String param) { 702 703 return getShortValues(serviceContext, param, new short[0]); 704 } 705 706 public static short[] getShortValues( 707 ServiceContext serviceContext, String param, short[] defaultValue) { 708 709 return GetterUtil.getShortValues( 710 serviceContext.getAttribute(param), defaultValue); 711 } 712 713 public static String getString(HttpServletRequest request, String param) { 714 return GetterUtil.getString(request.getParameter(param)); 715 } 716 717 public static String getString( 718 HttpServletRequest request, String param, String defaultValue) { 719 720 return get(request, param, defaultValue); 721 } 722 723 public static String getString( 724 PortletRequest portletRequest, String param) { 725 726 return GetterUtil.getString(portletRequest.getParameter(param)); 727 } 728 729 public static String getString( 730 PortletRequest portletRequest, String param, String defaultValue) { 731 732 return get(portletRequest, param, defaultValue); 733 } 734 735 public static String getString( 736 ServiceContext serviceContext, String param) { 737 738 return GetterUtil.getString(serviceContext.getAttribute(param)); 739 } 740 741 public static String getString( 742 ServiceContext serviceContext, String param, String defaultValue) { 743 744 return get(serviceContext, param, defaultValue); 745 } 746 747 public static void print(HttpServletRequest request) { 748 Enumeration<String> enu = request.getParameterNames(); 749 750 while (enu.hasMoreElements()) { 751 String param = enu.nextElement(); 752 753 String[] values = request.getParameterValues(param); 754 755 for (int i = 0; i < values.length; i++) { 756 System.out.println(param + "[" + i + "] = " + values[i]); 757 } 758 } 759 } 760 761 public static void print(PortletRequest portletRequest) { 762 Enumeration<String> enu = portletRequest.getParameterNames(); 763 764 while (enu.hasMoreElements()) { 765 String param = enu.nextElement(); 766 767 String[] values = portletRequest.getParameterValues(param); 768 769 for (int i = 0; i < values.length; i++) { 770 System.out.println(param + "[" + i + "] = " + values[i]); 771 } 772 } 773 } 774 775 public static void print(ServiceContext serviceContext) { 776 Map<String, Serializable> attributes = serviceContext.getAttributes(); 777 778 for (Map.Entry<String, Serializable> entry : attributes.entrySet()) { 779 System.out.println( 780 entry.getKey() + " = " + String.valueOf(entry.getValue())); 781 } 782 } 783 784 }
在上述的源代码中ParamUtil这个类又调用了GetterUtil这个类中的方法,ParamUtil这个类是干什么用的啊,估计大家会有疑问,这个很类的作用就是获取我们从界面上输入的参数,传给后台用的,比如界面上有一个输入的用户名(“username”),你想获取的时候怎么办啊,在servlet中我们可以用request.getParamter("username");就可以得到用户名,但是在liferay中我们需要这样写,ParamUtil.getString(actionRequest,"username",StringPool.BLACK);就可以了,我首先说一下这里面的参数,第一个参数不用说大家也估计能猜出来,就是一个请求,类似于servlet中request,第二个参数就是你在界面上定义的name,第三个我特别想说一下,你说编写liferay的人是不是脑子有坑,为什么在StringPool中定义那么多的常量,明明一个 StringPool.BLANK = "",直接在上述的方法中写一个""就可以了,为什么这个复杂,真心不明白,下面献上StringPool中的源代码
package com.liferay.portal.kernel.util; 016 017 /** 018 * @author Brian Wing Shun Chan 019 */ 020 public class StringPool { 021 022 public static final String AMPERSAND = "&"; 023 024 public static final String AMPERSAND_ENCODED = "&"; 025 026 public static final String APOSTROPHE = "'"; 027 028 public static final String AT = "@"; 029 030 public static final String BACK_SLASH = "\\"; 031 032 public static final String BETWEEN = "BETWEEN"; 033 034 public static final String BLANK = ""; 035 036 public static final String CARET = "^"; 037 038 public static final String CDATA_CLOSE = "]]>"; 039 040 public static final String CDATA_OPEN = "<![CDATA["; 041 042 public static final String CLOSE_BRACKET = "]"; 043 044 public static final String CLOSE_CURLY_BRACE = "}"; 045 046 public static final String CLOSE_PARENTHESIS = ")"; 047 048 public static final String COLON = ":"; 049 050 public static final String COMMA = ","; 051 052 public static final String COMMA_AND_SPACE = ", "; 053 054 public static final String DASH = "-"; 055 056 public static final String DOLLAR = "$"; 057 058 public static final String DOLLAR_AND_OPEN_CURLY_BRACE = "${"; 059 060 public static final String DOUBLE_APOSTROPHE = "''"; 061 062 public static final String DOUBLE_CLOSE_BRACKET = "]]"; 063 064 public static final String DOUBLE_CLOSE_CURLY_BRACE = "}}"; 065 066 public static final String DOUBLE_OPEN_BRACKET = "[["; 067 068 public static final String DOUBLE_OPEN_CURLY_BRACE = "{{"; 069 070 public static final String DOUBLE_PERIOD = ".."; 071 072 public static final String DOUBLE_QUOTE = "\"\""; 073 074 public static final String DOUBLE_SLASH = "//"; 075 076 public static final String DOUBLE_SPACE = " "; 077 078 public static final String EXCLAMATION = "!"; 079 080 public static final String EQUAL = "="; 081 082 public static final String FALSE = "false"; 083 084 public static final String FORWARD_SLASH = "/"; 085 086 public static final String FOUR_SPACES = " "; 087 088 public static final String GRAVE_ACCENT = "`"; 089 090 public static final String GREATER_THAN = ">"; 091 092 public static final String GREATER_THAN_OR_EQUAL = ">="; 093 094 public static final String INVERTED_EXCLAMATION = "\u00A1"; 095 096 public static final String INVERTED_QUESTION = "\u00BF"; 097 098 public static final String IS_NOT_NULL = "IS NOT NULL"; 099 100 public static final String IS_NULL = "IS NULL"; 101 102 public static final String ISO_8859_1 = "ISO-8859-1"; 103 104 public static final String LESS_THAN = "<"; 105 106 public static final String LESS_THAN_OR_EQUAL = "<="; 107 108 public static final String LIKE = "LIKE"; 109 110 public static final String MINUS = "-"; 111 112 public static final String NBSP = " "; 113 114 public static final String NEW_LINE = "\n"; 115 116 public static final String NOT_EQUAL = "!="; 117 118 public static final String NOT_LIKE = "NOT LIKE"; 119 120 public static final String NULL = "null"; 121 122 public static final String OPEN_BRACKET = "["; 123 124 public static final String OPEN_CURLY_BRACE = "{"; 125 126 public static final String OPEN_PARENTHESIS = "("; 127 128 public static final String PERCENT = "%"; 129 130 public static final String PERIOD = "."; 131 132 public static final String PIPE = "|"; 133 134 public static final String PLUS = "+"; 135 136 public static final String POUND = "#"; 137 138 public static final String QUESTION = "?"; 139 140 public static final String QUOTE = "\""; 141 142 public static final String RETURN = "\r"; 143 144 public static final String RETURN_NEW_LINE = "\r\n"; 145 146 public static final String SEMICOLON = ";"; 147 148 public static final String SLASH = FORWARD_SLASH; 149 150 public static final String SPACE = " "; 151 152 public static final String STAR = "*"; 153 154 public static final String TAB = "\t"; 155 156 public static final String TILDE = "~"; 157 158 public static final String TRUE = "true"; 159 160 public static final String UNDERLINE = "_"; 161 162 public static final String UTC = "UTC"; 163 164 public static final String UTF8 = "UTF-8"; 165 166 }
上述就是获取参数的源代码,不管是什么样类型的数据,后台都可以通过这种方式获得。今天就到这,有兴趣的朋友大家可以写一个简单的页面和portlet来测试一下。