jackson工具类详解编程语言

package com.rf.dtd.systemsupport.reportmodel.Util; 

import java.lang.annotation.Annotation; 

import javax.persistence.Basic; 

import javax.persistence.ElementCollection; 

import javax.persistence.FetchType; 

import javax.persistence.ManyToMany; 

import javax.persistence.ManyToOne; 

import javax.persistence.OneToMany; 

import javax.persistence.OneToOne; 

import org.codehaus.jackson.map.introspect.Annotated; 

import org.codehaus.jackson.map.introspect.JacksonAnnotationIntrospector; 

class JpaLazyIntrospector extends JacksonAnnotationIntrospector 

 public boolean isHandled(Annotation ann) 

 boolean handled = super.isHandled(ann); 

 if (!handled) { 

 handled = ann.toString().startsWith("@javax.persistence"); 

 if (!handled) { 

 handled = ann.annotationType().equals(JsonLazy.class); 

 return handled; 

 protected boolean _isIgnorable(Annotated a) 

 boolean ignor = super._isIgnorable(a); 

 if (!ignor) { 

 ignor = isLazy(a); 

 return ignor; 

 private boolean isLazy(Annotated a) { 

 boolean lazy = false; 

 JsonLazy jsonLazy = (JsonLazy)a.getAnnotation(JsonLazy.class); 

 if (jsonLazy != null) { 

 return false; 

 Basic basic = (Basic)a.getAnnotation(Basic.class); 

 if ((basic != null) (basic.fetch() == FetchType.LAZY)) { 

 lazy = true; 

 ElementCollection elementCollection = (ElementCollection)a.getAnnotation(ElementCollection.class); 

 if ((elementCollection != null) (elementCollection.fetch() != FetchType.EAGER)) { 

 lazy = true; 

 ManyToMany manyToMany = (ManyToMany)a.getAnnotation(ManyToMany.class); 

 if ((manyToMany != null) (manyToMany.fetch() != FetchType.EAGER)) { 

 lazy = true; 

 OneToMany oneToMany = (OneToMany)a.getAnnotation(OneToMany.class); 

 if ((oneToMany != null) (oneToMany.fetch() != FetchType.EAGER)) { 

 lazy = true; 

 ManyToOne manyToOne = (ManyToOne)a.getAnnotation(ManyToOne.class); 

 if ((manyToOne != null) (manyToOne.fetch() == FetchType.LAZY)) { 

 lazy = true; 

 OneToOne oneToOne = (OneToOne)a.getAnnotation(OneToOne.class); 

 if ((oneToOne != null) (oneToOne.fetch() == FetchType.LAZY)) { 

 lazy = true; 

 return lazy; 

}

package com.rf.dtd.systemsupport.reportmodel.Util; 

import java.lang.annotation.Retention; 

import java.lang.annotation.RetentionPolicy; 

import java.lang.annotation.Target; 

@Target({java.lang.annotation.ElementType.METHOD, java.lang.annotation.ElementType.FIELD}) 

@Retention(RetentionPolicy.RUNTIME) 

public @interface JsonLazy 

 public abstract boolean value(); 

}

package com.rf.dtd.systemsupport.reportmodel.Util; 

import java.io.BufferedReader; 

import java.io.File; 

import java.io.FileReader; 

import java.io.IOException; 

import java.io.Writer; 

import java.text.SimpleDateFormat; 

import java.util.ArrayList; 

import java.util.Iterator; 

import java.util.LinkedHashMap; 

import java.util.List; 

import java.util.Map; 

import org.codehaus.jackson.JsonNode; 

import org.codehaus.jackson.JsonParser; 

import org.codehaus.jackson.map.DeserializationConfig; 

import org.codehaus.jackson.map.ObjectMapper; 

import org.codehaus.jackson.map.SerializationConfig; 

import org.codehaus.jackson.node.TextNode; 

import org.codehaus.jackson.type.TypeReference; 

public abstract class JsonUtil 

 public static void main(String[] args) 

 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/"}"); 

 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/" } ] } ] }"; 

 Object sssw = parseJson(josnString); 

 System.out.println(sssw); 

 System.out.println(ss); 

 public static String getJSONString(String filePath) throws Exception{ 

 StringBuffer data = new StringBuffer(); 

 BufferedReader reader = null; 

 reader = new BufferedReader(new FileReader(new File(filePath))); 

 String temp = null; 

 while((temp = reader.readLine()) != null){ 

 data.append(temp); 

 if (reader != null){ 

 reader.close(); 

 return data.toString(); 

 public static ObjectMapper getObjectMapper() { 

 ObjectMapper om = new ObjectMapper().setAnnotationIntrospector(new JpaLazyIntrospector()); 

 om.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")); 

 om.configure(SerializationConfig.Feature.INDENT_OUTPUT, true); 

 om.configure(SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS, false); 

 om.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false); 

 om.configure(DeserializationConfig.Feature.FAIL_ON_NULL_FOR_PRIMITIVES, false); 

 om.configure(DeserializationConfig.Feature.FAIL_ON_NUMBERS_FOR_ENUMS, false); 

 om.configure(DeserializationConfig.Feature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true); 

 om.configure(DeserializationConfig.Feature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT, true); 

 om.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true); 

 return om; 

 public static String toJsonString(Object object) 

 try 

 return getObjectMapper().writeValueAsString(object); 

 } catch (IOException ex) { 

 throw new RuntimeException(ex); 

 public static void writeJsonString(Object object, Writer writer) 

 try 

 getObjectMapper().writeValue(writer, object); 

 } catch (IOException ex) { 

 throw new RuntimeException(ex); 

 public static Map ?, ? parseJson(String jsonString) 

 JsonNode jn = null; 

 try { 

 jn = getObjectMapper().readTree(jsonString); 

 } catch (IOException ex) { 

 ex.printStackTrace(); 

 return (Map ?, ? )JsonNodeToMap(jn); 

 public static Object parseJson2MapOrList(String jsonString) 

 JsonNode jn = null; 

 try { 

 jn = getObjectMapper().readTree(jsonString); 

 } catch (IOException ex) { 

 ex.printStackTrace(); 

 return JsonNodeToMap(jn); 

 public static T T parseJson(String jsonString, Class T classType) 

 try { 

 return getObjectMapper().readValue(jsonString, classType); 

 } catch (Exception ex) { 

 ex.printStackTrace(); 

 }return null; 

 public static T T parseJson(String jsonString, TypeReference T typeReference) 

 try 

 return getObjectMapper().readValue(jsonString, typeReference); 

 } catch (Exception ex) { 

 ex.printStackTrace(); 

 }return null; 

 public static T T parseJsonT(String jsonString) 

 try 

 return getObjectMapper().readValue(jsonString, new TypeReference Object () { } ); 

 catch (Exception ex) { 

 ex.printStackTrace(); 

 }return null; 

 public static T Map ?, ? bean2Map(Object bean) 

 try 

 return (Map ?, ? )getObjectMapper().convertValue(bean, Map.class); 

 } catch (Exception ex) { 

 ex.printStackTrace(); 

 }return null; 

 public static T T map2Bean(Map ?, ? map, Class T clazz) 

 try 

 return getObjectMapper().convertValue(map, clazz); 

 } catch (Exception ex) { 

 ex.printStackTrace(); 

 }return null; 

 public static Object JsonNodeToMap(JsonNode root) 

 Map String, Object map = new LinkedHashMap String, Object 

 if (root == null) { 

 return map; 

 if (root.isArray()) { 

 List Object list = new ArrayList Object 

 for (JsonNode node : root) { 

 Object nmp = JsonNodeToMap(node); 

 list.add(nmp); 

 return list; 

 }if (root.isTextual()) { 

 try { 

 return ((TextNode)root).asText(); 

 } catch (Exception e) { 

 return root.toString(); 

 Iterator ? iter = root.getFields(); 

 while (iter.hasNext()) { 

 @SuppressWarnings("rawtypes") 

 Map.Entry entry = (Map.Entry)iter.next(); 

 String key = (String)entry.getKey(); 

 JsonNode ele = (JsonNode)entry.getValue(); 

 if (ele.isObject()) 

 map.put(key, JsonNodeToMap(ele)); 

 else if (ele.isTextual()) 

 map.put(key, ((TextNode)ele).asText()); 

 else if (ele.isArray()) 

 map.put(key, JsonNodeToMap(ele)); 

 else { 

 map.put(key, ele.toString()); 

 return map; 

}

原创文章，作者：Maggie-Hunter，如若转载，请注明出处：https://blog.ytso.com/10333.html