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jackson工具类
没有闭门造车.解决了lazyload的问题
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.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;
}
}
JsonLazy.java
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();
}
JsonUtil.java ~ 9KB
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;
}
}