xml字符串 json java xml字符串转java对象

Java代码  

1. import java.lang.reflect.Field;  
2. import java.util.List;  
3. 
4. import com.thoughtworks.xstream.XStream;  
5. 
6. public class XmlUtil {  
7. // 所有需要注册的类的配置,  
8. public static final String CONFIGFILE = new GetClassPath()  
9. .getMyConfigPath()  
10. + "/xml.prop";  
11. 
12. private static XStream xs = null;  
13. 
14. private static XmlUtil xmlUtil = null;  
15. 
16. private XmlUtil() {  
17. try {  
18. // 获取所有需要与处理的java完整名  
19. List list = FileUtil.readFile(CONFIGFILE);  
20. 
21. //初始化xs  
22. xs = alias(list);  
23. } catch (ClassNotFoundException e) {  
24. e.printStackTrace();  
25. }  
26. }  
27. 
28. /** 
29. * 获得实例 
30. * @return 
31. */  
32. public static synchronized XmlUtil getInstance() {  
33. 
34. if(null == xmlUtil){  
35. xmlUtil = new XmlUtil();  
36. }  
37. 
38. return xmlUtil;  
39. }  
40. 
41. /** 
42. * 根据类名做反射 
43. *  
44. * @param list 
45. *            类完整名 
46. * @return 
47. * @throws ClassNotFoundException 
48. */  
49. public XStream alias(List list) throws ClassNotFoundException {  
50. XStream xs = new XStream();  
51. for (int i = 0; i < list.size(); i++) {  
52. Object obj;  
53. try {  
54. obj = Class.forName((String) list.get(i)).newInstance();  
55. Class zz = obj.getClass();  
56. aliasAtt(xs, zz);  
57. } catch (InstantiationException e) {  
58. e.printStackTrace();  
59. } catch (IllegalAccessException e) {  
60. e.printStackTrace();  
61. }  
62. }  
63. return xs;  
64. }  
65. 
66. /** 
67. * 对类进行xml解析配置 
68. *  
69. * @param xs 
70. * @param z 
71. *            class对象 
72. */  
73. public void aliasAtt(XStream xs, Class z) {  
74. if (null == z) {  
75. return;  
76. }  
77. 
78. // 类名注册  
79. xs.alias(z.getSimpleName(), z);  
80. Field[] field = z.getDeclaredFields();  
81. // 类中成员变量注册,继承的不注册  
82. for (int i = 0; i < field.length; i++) {  
83. xs.aliasField(field[i].getName(), z, field[i].getName());  
84. }  
85. }  
86. 
87. /** 
88. * xml 格式字符串转换为对象 
89. * @param str 
90. * @return 
91. */  
92. public Object xmlToObject(String str) {  
93. return xs.fromXML(str);  
94. }  
95. 
96. /** 
97. * 对象转换为xml格式字符串 
98. * @param obj 
99. * @return 
100. */  
101. public String objToXml(Object obj) {  
102. return xs.toXML(obj);  
103. }  
104. }  
105. 
106. FileUtil.readFile()方法如下  
107. 
108. /** 
109. * 读取文件 
110. *  
111. * @param filePath 
112. *            文件完整名 
113. * @return 文件内容 
114. * @throws IOException 
115. */  
116. public static List readFile(String filePath) {  
117. 
118. List list = new ArrayList();  
119. 
120. FileInputStream fs = null;  
121. InputStreamReader isr = null;  
122. BufferedReader br = null;  
123. 
124. try {  
125. fs = new FileInputStream(filePath);  
126. 
127. isr = new InputStreamReader(fs);  
128. 
129. br = new BufferedReader(isr);  
130. 
131. String data = "";  
132. while ((data = br.readLine()) != null) {  
133. list.add(data.trim());  
134. }  
135. } catch (IOException e) {  
136. e.printStackTrace();  
137. } finally {  
138. try {  
139. if (br != null)  
140. br.close();  
141. if (isr != null)  
142. isr.close();  
143. 
144. if (fs != null)  
145. fs.close();  
146. 
147. } catch (IOException e) {  
148. e.printStackTrace();  
149. }  
150. }  
151. 
152. return list;  
153. }  
154. 
155. Test  
156. Printdata pd = new Printdata();  
157. pd.setPrintFileList(printFileList);  
158. pd.setAuto("1");  
159. pd.setBillReceiver("billReceiver");  
160. pd.setCustId("cust_id");  
161. pd.setYear("2011");  
162. pd.setMonth("11");  
163. List list = FileUtil.readFile(XmlUtil.CONFIGFILE);  
164. XmlUtil xmlUtil = XmlUtil.getInstance();  
165. String xml = xmlUtil.objToXml(pd);//对象至xml  
166. System.out.println(xml);  
167. Printdata obj = (Printdata)xmlUtil.xmlToObject(xml);//xml至对象