1 import org.json.JSONException;
2 import org.json.JSONObject;
3 import org.dom4j.DocumentException;
4 import org.dom4j.DocumentHelper;
5
6 public class StringTest {
7
8 /**
9 * @param args
10 */
11 public static void main(String[] args) {
12 String string1 = "123";
13 String string2 = "fdgsewe323";
14 String string3 = "{/"task/":/"324vfsdfg/"}";
15 String string4 = "<ww>3243</ww>";
16 // System.out.println("string1::number"+isNumber(string1));
17 // System.out.println("string2::number"+isNumber(string2));
18 // System.out.println("string3::json"+isJson(string3));
19 // System.out.println("string4::xml"+isXML(string4));
20 // System.out.println("string1::json"+isJson(string1));
21 // System.out.println("string2::xml"+isXML(string2));
22 // System.out.println("string3::number"+isNumber(string3));
23 // System.out.println("string4::xml"+isXML(string4));
24
25 System.out.println("string1::"+getType(string1));
26 System.out.println("string2::"+getType(string2));
27 System.out.println("string3::"+getType(string3));
28 System.out.println("string4::"+getType(string4));
29 }
30
31 public static String getType(String string) {
32 if (isNumber(string))
33 return "Number";
34 else if (isJson(string))
35 return "Json";
36 else if (isXML(string))
37 return "xml";
38 else
39 return "String";
40 }
41
42
43 /**
44 * 判断字符串是否是数字
45 */
46 public static boolean isNumber(String value) {
47 return isInteger(value) || isDouble(value);
48 }
49
50 /**
51 * 判断字符串是否是整数
52 */
53 public static boolean isInteger(String value) {
54 try {
55 Integer.parseInt(value);
56 return true;
57 } catch (NumberFormatException e) {
58 return false;
59 }
60 }
61
62 /**
63 * 判断字符串是否是浮点数
64 */
65 public static boolean isDouble(String value) {
66 try {
67 Double.parseDouble(value);
68 if (value.contains("."))
69 return true;
70 return false;
71 } catch (NumberFormatException e) {
72 return false;
73 }
74 }
75
76 /**
77 * 判断是否是json结构
78 */
79 public static boolean isJson(String value) {
80 try {
81 new JSONObject(value);
82 } catch (JSONException e) {
83 return false;
84 }
85 return true;
86 }
87
88 /**
89 * 判断是否是xml结构
90 */
91 public static boolean isXML(String value) {
92 try {
93 DocumentHelper.parseText(value);
94 } catch (DocumentException e) {
95 return false;
96 }
97 return true;
98 }
99 }
