1、在pom.xml中添加依賴，這裏我們引用的是：com.fasterxml.jackson...相關的jar包
2、編寫工具類，這個參考網上的很多例子
package com.zpl.util.json;
import java.io.IOException;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.zpl.util.ClassUtil;
import com.zpl.util.date.DateUtil;
import com.zpl.util.string.StrUtil;
/**
* json處理工具
* @author
*
*/
public class JSONUtil {
private static final ObjectMapper mapper = new ObjectMapper();
static {
mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS, true);
mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
DateFormat d = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
mapper.setDateFormat(d);
mapper.getSerializerProvider().setNullValueSerializer(new JsonSerializer<Object>() {
@Override
public void serialize(Object arg0, JsonGenerator arg1, SerializerProvider arg2) throws IOException, JsonProcessingException {
arg1.writeString("");
}
});
}
/**
*
* @param map
* 存json對象的map
* @param key
* request中的key
* @param value
* request中的值
* @return
*/
public static void initJsonObject(Map<String, Object> map, String key, String value) {
if (map == null)
return;
key = key.replaceAll("]", "").replace("[", "#");
String[] keyArray = key.split("#");
if (keyArray.length < 2)
return;
// date結尾，轉換爲日期類型
if (keyArray[1].toLowerCase().endsWith("date") && !StrUtil.isNull(value) && DateUtil.isValidDate(value))
map.put(keyArray[1], DateUtil.string2Date(value));
else
map.put(keyArray[1], value);
}
/**
* json數組轉list
*
* @param jsonArr
* @return
* @throws Exception
* @throws JsonMappingException
* @throws JsonParseException
*/
public static List<Map<String, Object>> json2List(String jsonObj) {
try {
return mapper.readValue(jsonObj, mapper.getTypeFactory().constructCollectionType(ArrayList.class, Map.class));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* json對象轉map
*
* @param jsonObj
* @return
* @throws Exception
* @throws JsonMappingException
* @throws JsonParseException
*/
public static Map<String, Object> json2Map(String jsonObj) {
if (StrUtil.isNull(jsonObj))
return new HashMap<String, Object>();
try {
return mapper.readValue(jsonObj, mapper.getTypeFactory().constructMapType(Map.class, String.class, Object.class));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static <T> T json2Object(String jsonObj, Class<T> requiredType) {
try {
return mapper.readValue(jsonObj, requiredType);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* list轉json數組
*
* @param list
* @return
* @throws Exception
*/
public static String formatJSONArray(List<?> list) {
try {
return mapper.writeValueAsString(list);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
/**
* map轉json對象
*
* @param map
* @return
* @throws Exception
*/
public static String formatJSONObject(Map<?, ?> map) {
try {
return mapper.writeValueAsString(map);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
/**
* Object轉json對象
*
* @param map
* @return
* @throws Exception
*/
public static String formatObject(Object object) {
try {
return mapper.writeValueAsString(object);
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
public static void main(String[] args) {
String qiwang = "{\"array3\":[[{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"}],[{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"}],\"list_stringtest1\",\"list_stringtest2\",\"list_stringtest3\"],\"性別\":\"投保人xin_bie\",\"姓名\":\"投保人xin_ming\",\"maptest\":{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},\"stringtest\":[\"list_stringtest1\",\"list_stringtest2\",\"list_stringtest3\"],\"出生日期_date\":\"2015-01-01\",\"學歷\":\"投保人xue_li\",\"國籍\":\"投保人guo_ji\",\"被保人\":[{\"性別\":\"被保人_1_xin_bie\",\"姓名\":\"被保人_1_xin_ming\",\"受益人\":[{\"性別\":\"受益人_2_xin_bie\",\"姓名\":\"受益人_2_xin_ming\",\"地址\":[{\"地址二\":\"受益人_2_di_zhi_2\",\"地址一\":\"受益人_2_di_zhi_1\",\"地址三\":\"受益人_2_di_zhi_3\",\"地址四\":\"受益人_2_di_zhi_4\"},{\"地址二\":\"受益人_2_di_zhi_2\",\"地址一\":\"受益人_2_di_zhi_1\",\"地址三\":\"受益人_2_di_zhi_3\",\"地址四\":\"受益人_2_di_zhi_4\"}],\"學歷\":\"受益人_2_xue_li\",\"國籍\":\"受益人_2_guo_ji\",\"出生日期\":\"受益人_2_chu_sheng_ri_qi\"},{\"性別\":\"受益人_3_xin_bie\",\"姓名\":\"受益人_3_xin_ming\",\"地址\":[{\"地址二\":\"受益人_3_di_zhi_2\",\"地址一\":\"受益人_3_di_zhi_1\",\"地址三\":\"受益人_3_di_zhi_3\",\"地址四\":\"受益人_3_di_zhi_4\"},{\"地址二\":\"受益人_3_di_zhi_2\",\"地址一\":\"受益人_3_di_zhi_1\",\"地址三\":\"受益人_3_di_zhi_3\",\"地址四\":\"受益人_3_di_zhi_4\"}],\"學歷\":\"受益人_3_xue_li\",\"國籍\":\"受益人_3_guo_ji\",\"出生日期\":\"受益人_3_chu_sheng_ri_qi\"},{\"array3\":[[{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"}],[{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"}],\"list_stringtest1\",\"list_stringtest2\",\"list_stringtest3\"],\"性別\":\"受益人_4_xin_bie\",\"姓名\":\"受益人_4_xin_ming\",\"地址\":[{\"地址二\":\"受益人_4_di_zhi_2\",\"地址一\":\"受益人_4_di_zhi_1\",\"地址三\":\"受益人_4_di_zhi_3\",\"地址四\":\"受益人_4_di_zhi_4\"},{\"地址二\":\"受益人_4_di_zhi_2\",\"地址一\":\"受益人_4_di_zhi_1\",\"地址三\":\"受益人_4_di_zhi_3\",\"地址四\":\"受益人_4_di_zhi_4\"}],\"學歷\":\"受益人_4_xue_li\",\"國籍\":\"受益人_4_guo_ji\",\"出生日期\":\"受益人_4_chu_sheng_ri_qi\"}],\"地址\":[{\"地址二\":\"被保人_1_di_zhi_2\",\"地址一\":\"被保人_1_di_zhi_1\",\"地址三\":\"被保人_1_di_zhi_3\",\"地址四\":\"被保人_1_di_zhi_4\"},{\"地址二\":\"被保人_1_di_zhi_2\",\"地址一\":\"被保人_1_di_zhi_1\",\"地址三\":\"被保人_1_di_zhi_3\",\"地址四\":\"被保人_1_di_zhi_4\"}],\"學歷\":\"被保人_1_xue_li\",\"國籍\":\"被保人_1_guo_ji\",\"出生日期\":\"被保人_1_chu_sheng_ri_qi\"},{\"性別\":\"被保人_2_xin_bie\",\"姓名\":\"被保人_2_xin_ming\",\"受益人\":[{\"性別\":\"受益人_2_xin_bie\",\"姓名\":\"受益人_2_xin_ming\",\"地址\":[{\"地址二\":\"受益人_2_di_zhi_2\",\"地址一\":\"受益人_2_di_zhi_1\",\"地址三\":\"受益人_2_di_zhi_3\",\"地址四\":\"受益人_2_di_zhi_4\"},{\"地址二\":\"受益人_2_di_zhi_2\",\"地址一\":\"受益人_2_di_zhi_1\",\"地址三\":\"受益人_2_di_zhi_3\",\"地址四\":\"受益人_2_di_zhi_4\"}],\"學歷\":\"受益人_2_xue_li\",\"國籍\":\"受益人_2_guo_ji\",\"出生日期\":\"受益人_2_chu_sheng_ri_qi\"},{\"性別\":\"受益人_3_xin_bie\",\"姓名\":\"受益人_3_xin_ming\",\"地址\":[{\"地址二\":\"受益人_3_di_zhi_2\",\"地址一\":\"受益人_3_di_zhi_1\",\"地址三\":\"受益人_3_di_zhi_3\",\"地址四\":\"受益人_3_di_zhi_4\"},{\"地址二\":\"受益人_3_di_zhi_2\",\"地址一\":\"受益人_3_di_zhi_1\",\"地址三\":\"受益人_3_di_zhi_3\",\"地址四\":\"受益人_3_di_zhi_4\"}],\"學歷\":\"受益人_3_xue_li\",\"國籍\":\"受益人_3_guo_ji\",\"出生日期\":\"受益人_3_chu_sheng_ri_qi\"},{\"array3\":[[{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"}],[{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"}],\"list_stringtest1\",\"list_stringtest2\",\"list_stringtest3\"],\"性別\":\"受益人_4_xin_bie\",\"姓名\":\"受益人_4_xin_ming\",\"地址\":[{\"地址二\":\"受益人_4_di_zhi_2\",\"地址一\":\"受益人_4_di_zhi_1\",\"地址三\":\"受益人_4_di_zhi_3\",\"地址四\":\"受益人_4_di_zhi_4\"},{\"地址二\":\"受益人_4_di_zhi_2\",\"地址一\":\"受益人_4_di_zhi_1\",\"地址三\":\"受益人_4_di_zhi_3\",\"地址四\":\"受益人_4_di_zhi_4\"}],\"學歷\":\"受益人_4_xue_li\",\"國籍\":\"受益人_4_guo_ji\",\"出生日期\":\"受益人_4_chu_sheng_ri_qi\"}],\"地址\":[{\"地址二\":\"被保人_2_di_zhi_2\",\"地址一\":\"被保人_2_di_zhi_1\",\"地址三\":\"被保人_2_di_zhi_3\",\"地址四\":\"被保人_2_di_zhi_4\"},{\"地址二\":\"被保人_2_di_zhi_2\",\"地址一\":\"被保人_2_di_zhi_1\",\"地址三\":\"被保人_2_di_zhi_3\",\"地址四\":\"被保人_2_di_zhi_4\"}],\"學歷\":\"被保人_2_xue_li\",\"國籍\":\"被保人_2_guo_ji\",\"出生日期\":\"被保人_2_chu_sheng_ri_qi\"},{\"性別\":\"被保人_3_xin_bie\",\"姓名\":\"被保人_3_xin_ming\",\"受益人\":[{\"性別\":\"受益人_2_xin_bie\",\"姓名\":\"受益人_2_xin_ming\",\"地址\":[{\"地址二\":\"受益人_2_di_zhi_2\",\"地址一\":\"受益人_2_di_zhi_1\",\"地址三\":\"受益人_2_di_zhi_3\",\"地址四\":\"受益人_2_di_zhi_4\"},{\"地址二\":\"受益人_2_di_zhi_2\",\"地址一\":\"受益人_2_di_zhi_1\",\"地址三\":\"受益人_2_di_zhi_3\",\"地址四\":\"受益人_2_di_zhi_4\"}],\"學歷\":\"受益人_2_xue_li\",\"國籍\":\"受益人_2_guo_ji\",\"出生日期\":\"受益人_2_chu_sheng_ri_qi\"},{\"性別\":\"受益人_3_xin_bie\",\"姓名\":\"受益人_3_xin_ming\",\"地址\":[{\"地址二\":\"受益人_3_di_zhi_2\",\"地址一\":\"受益人_3_di_zhi_1\",\"地址三\":\"受益人_3_di_zhi_3\",\"地址四\":\"受益人_3_di_zhi_4\"},{\"地址二\":\"受益人_3_di_zhi_2\",\"地址一\":\"受益人_3_di_zhi_1\",\"地址三\":\"受益人_3_di_zhi_3\",\"地址四\":\"受益人_3_di_zhi_4\"}],\"學歷\":\"受益人_3_xue_li\",\"國籍\":\"受益人_3_guo_ji\",\"出生日期\":\"受益人_3_chu_sheng_ri_qi\"},{\"array3\":[[{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"}],[{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"test\":\"paramTest\",\"param\":\"param1\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"},{\"param\":\"param1\",\"test\":\"paramTest\",\"test2\":\"paramTest2\",\"test3\":\"paramTest3\"}],\"list_stringtest1\",\"list_stringtest2\",\"list_stringtest3\"],\"性別\":\"受益人_4_xin_bie\",\"姓名\":\"受益人_4_xin_ming\",\"地址\":[{\"地址二\":\"受益人_4_di_zhi_2\",\"地址一\":\"受益人_4_di_zhi_1\",\"地址三\":\"受益人_4_di_zhi_3\",\"地址四\":\"受益人_4_di_zhi_4\"},{\"地址二\":\"受益人_4_di_zhi_2\",\"地址一\":\"受益人_4_di_zhi_1\",\"地址三\":\"受益人_4_di_zhi_3\",\"地址四\":\"受益人_4_di_zhi_4\"}],\"學歷\":\"受益人_4_xue_li\",\"國籍\":\"受益人_4_guo_ji\",\"出生日期\":\"受益人_4_chu_sheng_ri_qi\"}],\"地址\":[{\"地址二\":\"被保人_3_di_zhi_2\",\"地址一\":\"被保人_3_di_zhi_1\",\"地址三\":\"被保人_3_di_zhi_3\",\"地址四\":\"被保人_3_di_zhi_4\"},{\"地址二\":\"被保人_3_di_zhi_2\",\"地址一\":\"被保人_3_di_zhi_1\",\"地址三\":\"被保人_3_di_zhi_3\",\"地址四\":\"被保人_3_di_zhi_4\"}],\"學歷\":\"被保人_3_xue_li\",\"國籍\":\"被保人_3_guo_ji\",\"出生日期\":\"被保人_3_chu_sheng_ri_qi\"}]}";
String json = "{\n" + " \"agentCode\": \"8827056\",\n" + " \"realName\": \"黃志芬\",\n" + " \"gender\": \"F\",\n"
+ " \"birthday\": \"1971-12-16\",\n" + " \"certiType\": \"1\",\n" + " \"certiCode\": \"330922197112163521\",\n"
+ " \"organId\": \"1330902\",\n" + " \"deptId\": \"1451900089\",\n"
+ " \"familyAddress\": \"浙江省舟山市定海區檀東頤景園40幢303室\",\n" + " \"telephone\": \"\",\n"
+ " \"cellerTel\": \"13464832332\",\n" + " \"email\": \"\",\n" + " \"recommendManId\": \"\",\n"
+ " \"gradeId\": \"304\",\n" + " \"enterCompanyDate\": \"2012-5-16\",\n" + " \"leaveCompanyDate\": \"2014-1-6\",\n"
+ " \"agentStatus\": \"2\",\n" + " \"probationDate\": \"2012-5-16\",\n" + " \"turnDate\": \"2014/1/6 16:01:19\",\n"
+ " \"agentCate\": \"4\",\n" + " \"reenterFlag\": \"0\",\n" + " \"insertTime\": \"2014/1/6 16:01:19\",\n"
+ " \"initGradeId\": \"01\",\n" + " \"greenPassport\": \"N\",\n" + " \"agentSubCate\": \"\",\n"
+ " \"trainManId\": \"0000001\",\n" + " \"indirectTrainId\": \"\",\n" + " \"deptTrainId\": \"0000001\",\n"
+ " \"indDeptTrainId\": \"0000001\",\n" + " \"areaTrainId\": \"0000001\",\n"
+ " \"indAreaTrainId\": \"0000001\",\n" + " \"trainIdValid\": \"0000001\",\n"
+ " \"indiTrainIdValid\": \"0000001\",\n" + " \"deptTrainIdValid\": \"0000001\",\n"
+ " \"indiDeptTrainIdValid\": \"0000001\",\n" + " \"areaTrainIdValid\": \"0000001\",\n"
+ " \"indiAreaTrainIdValid\": \"0000001\",\n" + " \"qualificationId\": \"0000001\",\n"
+ " \"practiceId\": \"0000001\",\n" + " \"outAgentCode\": \"\",\n" + " \"outOrganID\": \"\",\n"
+ " \"villageId\": \"0000001\",\n" + " \"agencyCode\": \"19420070\",\n"
+ " \"qualificationStartDate\": \"2012/6/1\",\n" + " \"qualificationEndDate\": \"2012/6/1\",\n"
+ " \"laborForm\": \"2\",\n" + " \"gradeName\": \"\",\n" + " \"versionId\": \"\",\n"
+ " \"updateTime\": \"2015-10-27 15:07:47\"\n" + "}";
long start = System.currentTimeMillis();
Map<String, Object> map = JSONUtil.json2Map(json);
long end = System.currentTimeMillis();
System.out.println("轉json=" + (end - start));
start = System.currentTimeMillis();
JSONUtil.toLowerCaseMap(map);
end = System.currentTimeMillis();
System.out.println("map key轉小寫=" + (end - start));
Map<String, Object> map_date = new HashMap<String, Object>();
map_date.put("crt_timestamp", DateUtil.sysTimestamp());
map_date.put("crtDate", DateUtil.sysDate());
map_date.put("crttime", DateUtil.sysTime());
System.out.println(JSONUtil.formatJSONObject(map_date));
}
public static Map<String, Object> toLowerCaseMap(Map<String, Object> map) {
Map<String, Object> param = new HashMap<String, Object>();
for (Map.Entry<String, Object> entry : map.entrySet()) {
param.put(entry.getKey().toLowerCase(), entry.getValue());
}
return param;
}
/**
* 將map轉換成對應的對象
*
* @param map
* 需要轉換的map
* @param cla
* 需要轉換的對象的類型
* @return 轉換後的類的對象
*/
public static <T> T mapToObject(Map<String, Object> map, Class<T> cla) {
try {
T t = cla.newInstance();
List<Field> fields = ClassUtil.getClassFields(cla);
for (Field field : fields) {
Object obj = map.get(field.getName());
// 當map中沒有這個值的時候，不進行操作
if (obj == null) {
continue;
}
@SuppressWarnings("rawtypes")
Class classType = field.getType();
field.setAccessible(true);
// 當是基本類型的時候，進行賦值的操作
if (classType == List.class) {// 當是集合的時候判斷泛型否是基本類型，當不是基本類型的時候進行轉換
Class<?> genericityClass = ClassUtil.getFieldGenericity(field);
if (genericityClass == null || ClassUtil.isBaseType(classType)) {
field.set(t, obj);
} else {
field.set(t, mapToListObj((List<Map<String, Object>>) obj, genericityClass));
}
} else if (ClassUtil.isBaseType(classType)) {
field.set(t, obj);
} else {
if ((obj instanceof Map) || (obj instanceof HashMap)) {
// 不是基本類型的時候，進行遞歸調用
Object returnObj = mapToObject((Map) obj, classType);
field.set(t, returnObj);
} else {
field.set(t, obj);
}
}
}
return t;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 將List<Map<String,Object>> 轉換成對應的類的集合
*
* @param list
* 需要轉換的集合
* @param cla
* 對象的類型
* @return 轉換之後的集合
*/
public static <T> List<T> mapToListObj(List<Map<String, Object>> list, Class<T> cla) {
try {
List<T> returnList = new ArrayList<T>();
for (Map<String, Object> map : list) {
T t = mapToObject(map, cla);
returnList.add(t);
}
return returnList;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* 將對象轉換成map
*
* @param obj
* @return
*/
public static Map<String, Object> objToMap(Object obj) {
String json = "";
Map<String, Object> map = new HashMap<String, Object>();
try {
json = mapper.writeValueAsString(obj);
map = json2Map(json);
return map;
} catch (JsonProcessingException e) {
throw new RuntimeException(e);
}
}
}