JSON string with the object, List, map of the Mutual-transfer tool class

Tag:json    object    map   list   

Package Com.cq2022.zago.base.util;import Java.io.filereader;import Java.io.filewriter;import java.io.IOException; Import Java.io.stringwriter;import java.util.list;import java.util.map;import org.codehaus.jackson.JsonFactory; Import Org.codehaus.jackson.jsongenerationexception;import Org.codehaus.jackson.jsongenerator;import Org.codehaus.jackson.jsonnode;import Org.codehaus.jackson.jsonparseexception;import Org.codehaus.jackson.map.jsonmappingexception;import Org.codehaus.jackson.map.objectmapper;import Org.codehaus.jackson.map.serializationconfig;import Org.codehaus.jackson.map.annotate.jsonserialize;import com.alibaba.fastjson.jsonarray;/** * JSON tool class, implementing JSON and Java Bean conversion * user:shijing * <span style= "font-family:arial, Helvetica, Sans-serif; " >2015 April 3 Morning 10:42:19</span> */public class Jsonutils {private static objectmapper Objectmapper = new Objectmapper ();p rivate static jsonfactory jsonfactory = new Jsonfactory (); static {Objectmapper.configure ( Serializationconfig.feature. Write_null_map_values, False); Objectmapper.setserializationinclusion (JsonSerialize.Inclusion.NON_NULL);} /** * Generic return, JSON string to Object * April 3, 2015 morning 10:42:19 * auther:shijing * @param jsonasstring * @param pojoclass * @return * @throws Jsonmappingexception * @throws jsonparseexception * @throws ioexception */public static <T> T Fromjson (String Jsonas String, class<t> Pojoclass) throws Jsonmappingexception,jsonparseexception, IOException {return Objectmapper.readvalue (jsonasstring, pojoclass);} public static <T> T Fromjson (FileReader fr, class<t> Pojoclass) throws Jsonparseexception, IOException {retur N Objectmapper.readvalue (FR, pojoclass);} /** * object to JSON * April 3, 2015 morning 10:41:53 * auther:shijing * @param pojo * @return * @throws jsonmappingexception * @throw S jsongenerationexception * @throws ioexception */public static String ToJson (Object pojo) throws Jsonmappingexception, Js Ongenerationexception, IOException {return ToJson (Pojo, false);} public static String ToJson (ObJect Pojo, Boolean prettyprint) throws Jsonmappingexception, jsongenerationexception,ioexception {stringwriter SW = new S Tringwriter (); Jsongenerator JG = Jsonfactory.createjsongenerator (SW); if (prettyprint) {jg.usedefaultprettyprinter ();} Objectmapper.writevalue (JG, Pojo); return sw.tostring ();} public static void ToJson (Object Pojo, FileWriter FW, Boolean Prettyprint) throws Jsonmappingexception, Jsongenerationexception, IOException {jsongenerator JG = Jsonfactory.createjsongenerator (FW), if (PrettyPrint) { Jg.usedefaultprettyprinter ();} Objectmapper.writevalue (JG, Pojo);} /** * JSON string to map * April 3, 2015 morning 10:41:25 * auther:shijing * @param jsonstr * @return * @throws ioexception */public static Map<string, object> parsemap (String jsonstr) throws IOException {map<string, object> Map = Objectmapper.readvalue (Jsonstr, Map.class); return Map;} public static Jsonnode Parse (String jsonstr) throws IOException {Jsonnode node = Null;node = Objectmapper.readtree (jsonstr ); return node;} Public STATic Objectmapper Getobjectmapper () {return objectmapper;} /** * JSON string to list Object * April 2, 2015 morning 10:22:20 * auther:shijing * @param strjson String * @param clazz conversion type * @return */public St atic <T> list<t> Fromlistjson (String str,class<t> clazz) {return Jsonarray.parsearray (str, clazz);}}

JSON string with the object, List, map of the Mutual-transfer tool class