Java Regular Expression Verification

1 public class RegEx {2 3/** 4 * check whether email input is correct. 5 * the correct format is username @ domain 6 * @ Param value 7 * @ return 8 */ 9 Public Boolean checkemail (string value, int length) {10 return value. matches ("\ W + ([-+.] \ W +) * @ \ W + ([-.] \ W + )*\\. \ W + ([-.] \ W +) * ") & value. length () <= length; 11} 12 13/** 14 * check whether the phone number is correct 15 * correct format 012-87654321, 0123-87654321, 0123-7654321 16 * @ Param value 17 * @ return 18 */19 publi C Boolean checktel (string value) {20 return value. matches ("\ D {4}-\ D {8} | \ D {4}-\ D {7} | \ D (3) -\ D (8 )"); 21} 22 23/** 24 * check whether the mobile phone input is correct 25*26 * @ Param value 27 * @ return 28 */29 public Boolean checkmobile (string value) {30 return value. matches ("^ [1] [3, 5] + \ D {9 }"); 31} 32 33/** 34 * check whether the Chinese name is correctly entered 35*36 * @ Param value 37 * @ return 38 */39 public Boolean checkchinesename (string value, int le Ngth) {40 return value. matches ("^ [\ u4e00-\ u9fa5] + $") & value. length () <= length; 41} 42/** 43 * Check for empty rows or spaces at the beginning and end of HTML 44 * @ Param value 45 * @ return 46 */47 Public Boolean checkblank (string value) {48 return value. matches ("^ \ s * | \ s * $ "); 49} 50/** 51 * check whether the string contains the HTML Tag 52 * @ Param value 53 * @ return 54 */55 56 public Boolean checkhtmltag (string value) {57 Return Value. matches ("<(\ s *?) [^>] *> .*? </\ 1> | <.*? /> "); 58} 59/** 60 * check whether the URL is valid 61 * @ Param value 62 * @ return 63 */64 public Boolean checkurl (string value) {65 return value. matches ("[A-Za-Z] +: // [^ \ s] *"); 66} 67/** 68 * check whether the IP address is valid 69 * @ Param value 70 * @ return 71 */72 public Boolean checkip (string value) {73 return value. matches ("\ D {1, 3} + \\. \ D {1, 3} + \\. \ D {1, 3} + \\. \ D {1, 3} "); 74} 75/** 76 * check whether the ID is valid. It must start with a uppercase/lowercase letter. Other digits can contain uppercase/lowercase characters, numbers, and underscores (_). 77 * @ Param value 78 * @ return 79 */80 public Boolean checkid (string value) {81 return value. matches ("[A-Za-Z] [a-zA-Z0-9 _] {} $"); 82} 83/** 84 * Check if QQ is valid and must be a number, and the first digit cannot be 0, and the maximum length is 15 * @ Param value 86 * @ return 87 */88 89 Public Boolean checkqq (string value) {90 return value. matches ("[1-9] [0-9] {4, 13 }"); 91} 92/** 93 * check whether the zip code is valid 94 * @ Param value 95 * @ return 96 */97 Public Boolean checkpostcode (S Tring value) {98 return value. Matches ("[1-9] \ D {5 }(?! \ D) "); 99} 100/** 101 * check whether the ID card is valid, 15 or 18-bit 102 * @ Param value 103 * @ return 104 */105 public Boolean checkidcard (string value) {106 return value. matches ("\ D {15} | \ D {18 }"); 107} 108/** 109 * check whether the input exceeds the specified length of 110 * @ Param length 112 * @ Param value 113 * @ return 114 */115 public Boolean checklength (string value, int length) {116 return (value = NULL | "". equals (value. trim ()))? 0: value. length () <= length; 117} 118 119/** 120 * check whether it is a Null String, null: True, not empty: false 121*122 * @ Param value 123 * @ return 124 */125 public Boolean checknull (string value) {126 return value = NULL | "". equals (value. trim (); 127} 128 129}