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jackson工具类

2016-12-20 13:16| 发布者: zhangjf| 查看: 463| 评论: 0

摘要: jackson工具类 没有闭门造车.解决了lazyload的问题 JpaLazyIntrospector.java package com.rf.dtd.systemsupport.reportmodel.Util;import java.lang.annotation.Annotation;import javax. ...
jackson工具类
没有闭门造车.解决了lazyload的问题

JpaLazyIntrospector.java
  1. package com.rf.dtd.systemsupport.reportmodel.Util;
  3. import java.lang.annotation.Annotation;
  4. import javax.persistence.Basic;
  5. import javax.persistence.ElementCollection;
  6. import javax.persistence.FetchType;
  7. import javax.persistence.ManyToMany;
  8. import javax.persistence.ManyToOne;
  9. import javax.persistence.OneToMany;
  10. import javax.persistence.OneToOne;
  11. import org.codehaus.jackson.map.introspect.Annotated;
  12. import org.codehaus.jackson.map.introspect.JacksonAnnotationIntrospector;
  14. class JpaLazyIntrospector extends JacksonAnnotationIntrospector
  15. {
  16. public boolean isHandled(Annotation ann)
  17. {
  18. boolean handled = super.isHandled(ann);
  19. if (!handled) {
  20. handled = ann.toString().startsWith("@javax.persistence");
  21. }
  22. if (!handled) {
  23. handled = ann.annotationType().equals(JsonLazy.class);
  24. }
  25. return handled;
  26. }
  28. protected boolean _isIgnorable(Annotated a)
  29. {
  30. boolean ignor = super._isIgnorable(a);
  31. if (!ignor) {
  32. ignor = isLazy(a);
  33. }
  34. return ignor;
  35. }
  37. private boolean isLazy(Annotated a) {
  38. boolean lazy = false;
  40. JsonLazy jsonLazy = (JsonLazy)a.getAnnotation(JsonLazy.class);
  41. if (jsonLazy != null) {
  42. return false;
  43. }
  45. Basic basic = (Basic)a.getAnnotation(Basic.class);
  46. if ((basic != null) && (basic.fetch() == FetchType.LAZY)) {
  47. lazy = true;
  48. }
  50. ElementCollection elementCollection = (ElementCollection)a.getAnnotation(ElementCollection.class);
  51. if ((elementCollection != null) && (elementCollection.fetch() != FetchType.EAGER)) {
  52. lazy = true;
  53. }
  55. ManyToMany manyToMany = (ManyToMany)a.getAnnotation(ManyToMany.class);
  56. if ((manyToMany != null) && (manyToMany.fetch() != FetchType.EAGER)) {
  57. lazy = true;
  58. }
  60. OneToMany oneToMany = (OneToMany)a.getAnnotation(OneToMany.class);
  61. if ((oneToMany != null) && (oneToMany.fetch() != FetchType.EAGER)) {
  62. lazy = true;
  63. }
  65. ManyToOne manyToOne = (ManyToOne)a.getAnnotation(ManyToOne.class);
  66. if ((manyToOne != null) && (manyToOne.fetch() == FetchType.LAZY)) {
  67. lazy = true;
  68. }
  70. OneToOne oneToOne = (OneToOne)a.getAnnotation(OneToOne.class);
  71. if ((oneToOne != null) && (oneToOne.fetch() == FetchType.LAZY)) {
  72. lazy = true;
  73. }
  74. return lazy;
  75. }
  76. }
复制代码
JsonLazy.java
  1. package com.rf.dtd.systemsupport.reportmodel.Util;
  3. import java.lang.annotation.Retention;
  4. import java.lang.annotation.RetentionPolicy;
  5. import java.lang.annotation.Target;
  7. @Target({java.lang.annotation.ElementType.METHOD, java.lang.annotation.ElementType.FIELD})
  8. @Retention(RetentionPolicy.RUNTIME)
  9. public @interface JsonLazy
  10. {
  11. public abstract boolean value();
  12. }
复制代码
JsonUtil.java ~ 9KB
  1. package com.rf.dtd.systemsupport.reportmodel.Util;
  3. import java.io.BufferedReader;
  4. import java.io.File;
  5. import java.io.FileReader;
  6. import java.io.IOException;
  7. import java.io.Writer;
  8. import java.text.SimpleDateFormat;
  9. import java.util.ArrayList;
  10. import java.util.Iterator;
  11. import java.util.LinkedHashMap;
  12. import java.util.List;
  13. import java.util.Map;
  15. import org.codehaus.jackson.JsonNode;
  16. import org.codehaus.jackson.JsonParser;
  17. import org.codehaus.jackson.map.DeserializationConfig;
  18. import org.codehaus.jackson.map.ObjectMapper;
  19. import org.codehaus.jackson.map.SerializationConfig;
  20. import org.codehaus.jackson.node.TextNode;
  21. import org.codehaus.jackson.type.TypeReference;
  23. public abstract class JsonUtil
  24. {
  25. public static void main(String[] args)
  26. {
  27. Object ss = parseJson("{"datasourceId":12201,"dsName":"bj","jndiName":"","driverClass":"oracle.jdbc.OracleDriver","jdbcURL":"jdbc:oracle:thin:@10.88.107.250:1521:orcl","userName":"devtest","password":"devtest"}");
  29. String josnString = "{ "excelName" : "组织结构模板.xls", "sheet" : [ { "entryCode" : "epdm_pcOrganizationT", "columns" : [ { "field" : "orgName", "title" : "机构名称" }, { "field" : "orgCode", "title" : "机构代码" }, { "field" : "canton", "title" : "行政区名称" }, { "field" : "cantonCode", "title" : "行政区代码" }, { "field" : "mailingAddress", "title" : "邮递地址" }, { "field" : "orgId", "title" : "ORG_ID" }, { "field" : "orgLevel", "title" : "级别" }, { "field" : "parentId", "title" : "上级机构名称" } ], "sheetName" : "Sheet1", "rows" : [ { "" : "", "orgId" : "444.0", "parentId" : "雍和宫", "cantonCode" : "7777.0", "orgCode" : "9999.0", "canton" : "石景山", "orgName" : "八角", "mailingAddress" : "102300.0", "orgLevel" : "中级" }, { "" : "", "orgId" : "444.0", "parentId" : "雍和宫", "cantonCode" : "7777.0", "orgCode" : "10000.0", "canton" : "石景山", "orgName" : "八角", "mailingAddress" : "102300.0", "orgLevel" : "中级" }, { "" : "", "orgId" : "444.0", "parentId" : "雍和宫", "cantonCode" : "7777.0", "orgCode" : "10001.0", "canton" : "石景山", "orgName" : "八角", "mailingAddress" : "102300.0", "orgLevel" : "中级" }, { "" : "", "orgId" : "444.0", "parentId" : "雍和宫", "cantonCode" : "7777.0", "orgCode" : "10002.0", "canton" : "石景山", "orgName" : "八角", "mailingAddress" : "102300.0", "orgLevel" : "中级" } ] }, { "entryCode" : "epdm_pcOrganizationT", "columns" : [ { "field" : "orgName", "title" : "机构名称" }, { "field" : "orgCode", "title" : "机构代码" }, { "field" : "canton", "title" : "行政区名称" }, { "field" : "cantonCode", "title" : "行政区代码" }, { "field" : "mailingAddress", "title" : "邮递地址" }, { "field" : "orgId", "title" : "ORG_ID" }, { "field" : "orgLevel", "title" : "级别" }, { "field" : "parentId", "title" : "上级机构名称" } ], "sheetName" : "Sheet2", "rows" : [ { "" : "", "orgId" : "444.0", "parentId" : "雍和宫", "cantonCode" : "7777.0", "orgCode" : "888.0", "canton" : "石景山", "orgName" : "八角", "mailingAddress" : "102300.0", "orgLevel" : "中级" }, { "" : "", "orgId" : "444.0", "parentId" : "雍和宫", "cantonCode" : "7777.0", "orgCode" : "889.0", "canton" : "石景山", "orgName" : "八角", "mailingAddress" : "102300.0", "orgLevel" : "中级" }, { "" : "", "orgId" : "444.0", "parentId" : "雍和宫", "cantonCode" : "7777.0", "orgCode" : "890.0", "canton" : "石景山", "orgName" : "八角", "mailingAddress" : "102300.0", "orgLevel" : "中级" }, { "" : "", "orgId" : "444.0", "parentId" : "雍和宫", "cantonCode" : "7777.0", "orgCode" : "891.0", "canton" : "石景山", "orgName" : "八角", "mailingAddress" : "102300.0", "orgLevel" : "中级" } ] } ] }";
  31. Object sssw = parseJson(josnString);
  32. System.out.println(sssw);
  33. System.out.println(ss);
  34. }
  36. public static String getJSONString(String filePath) throws Exception{
  37. StringBuffer data = new StringBuffer();
  38. BufferedReader reader = null;
  39. reader = new BufferedReader(new FileReader(new File(filePath)));
  40. String temp = null;
  41. while((temp = reader.readLine()) != null){
  42. data.append(temp);
  43. }
  44. if (reader != null){
  45. reader.close();
  46. }
  47. return data.toString();
  48. }
  50. public static ObjectMapper getObjectMapper() {
  51. ObjectMapper om = new ObjectMapper().setAnnotationIntrospector(new JpaLazyIntrospector());
  53. om.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
  54. om.configure(SerializationConfig.Feature.INDENT_OUTPUT, true);
  55. om.configure(SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS, false);
  56. om.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
  57. om.configure(DeserializationConfig.Feature.FAIL_ON_NULL_FOR_PRIMITIVES, false);
  58. om.configure(DeserializationConfig.Feature.FAIL_ON_NUMBERS_FOR_ENUMS, false);
  59. om.configure(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true);
  60. om.configure(DeserializationConfig.Feature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT, true);
  61. om.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
  63. return om;
  64. }
  66. public static String toJsonString(Object object)
  67. {
  68. try
  69. {
  70. return getObjectMapper().writeValueAsString(object);
  71. } catch (IOException ex) {
  72. throw new RuntimeException(ex);
  73. }
  74. }
  76. public static void writeJsonString(Object object, Writer writer)
  77. {
  78. try
  79. {
  80. getObjectMapper().writeValue(writer, object);
  81. } catch (IOException ex) {
  82. throw new RuntimeException(ex);
  83. }
  84. }
  86. public static Map<?, ?> parseJson(String jsonString)
  87. {
  88. JsonNode jn = null;
  89. try {
  90. jn = getObjectMapper().readTree(jsonString);
  91. } catch (IOException ex) {
  92. ex.printStackTrace();
  93. }
  94. return (Map<?, ?>)JsonNodeToMap(jn);
  95. }
  97. public static Object parseJson2MapOrList(String jsonString)
  98. {
  99. JsonNode jn = null;
  100. try {
  101. jn = getObjectMapper().readTree(jsonString);
  102. } catch (IOException ex) {
  103. ex.printStackTrace();
  104. }
  105. return JsonNodeToMap(jn);
  106. }
  108. public static <T> T parseJson(String jsonString, Class<T> classType)
  109. {
  110. try {
  111. return getObjectMapper().readValue(jsonString, classType);
  112. } catch (Exception ex) {
  113. ex.printStackTrace();
  114. }return null;
  115. }
  117. public static <T> T parseJson(String jsonString, TypeReference<T> typeReference)
  118. {
  119. try
  120. {
  121. return getObjectMapper().readValue(jsonString, typeReference);
  122. } catch (Exception ex) {
  123. ex.printStackTrace();
  124. }return null;
  125. }
  127. public static <T> T parseJsonT(String jsonString)
  128. {
  129. try
  130. {
  131. return getObjectMapper().readValue(jsonString, new TypeReference<Object>() { } );
  132. }
  133. catch (Exception ex) {
  134. ex.printStackTrace();
  135. }return null;
  136. }
  138. public static <T> Map<?, ?> bean2Map(Object bean)
  139. {
  140. try
  141. {
  142. return (Map<?, ?>)getObjectMapper().convertValue(bean, Map.class);
  143. } catch (Exception ex) {
  144. ex.printStackTrace();
  145. }return null;
  146. }
  148. public static <T> T map2Bean(Map<?, ?> map, Class<T> clazz)
  149. {
  150. try
  151. {
  152. return getObjectMapper().convertValue(map, clazz);
  153. } catch (Exception ex) {
  154. ex.printStackTrace();
  155. }return null;
  156. }
  158. public static Object JsonNodeToMap(JsonNode root)
  159. {
  160. Map<String, Object> map = new LinkedHashMap<String, Object>();
  161. if (root == null) {
  162. return map;
  163. }
  164. if (root.isArray()) {
  165. List<Object> list = new ArrayList<Object>();
  166. for (JsonNode node : root) {
  167. Object nmp = JsonNodeToMap(node);
  168. list.add(nmp);
  169. }
  170. return list;
  171. }if (root.isTextual()) {
  172. try {
  173. return ((TextNode)root).asText();
  174. } catch (Exception e) {
  175. return root.toString();
  176. }
  177. }
  178. Iterator<?> iter = root.getFields();
  179. while (iter.hasNext()) {
  180. @SuppressWarnings("rawtypes")
  181. Map.Entry entry = (Map.Entry)iter.next();
  182. String key = (String)entry.getKey();
  183. JsonNode ele = (JsonNode)entry.getValue();
  184. if (ele.isObject())
  185. map.put(key, JsonNodeToMap(ele));
  186. else if (ele.isTextual())
  187. map.put(key, ((TextNode)ele).asText());
  188. else if (ele.isArray())
  189. map.put(key, JsonNodeToMap(ele));
  190. else {
  191. map.put(key, ele.toString());
  192. }
  193. }
  194. return map;
  195. }
  196. }
复制代码
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