package org.springblade.jfpt.parcel.util;
|
|
import java.beans.BeanInfo;
|
import java.beans.Introspector;
|
import java.beans.PropertyDescriptor;
|
import java.lang.reflect.Method;
|
import java.util.HashMap;
|
import java.util.List;
|
import java.util.Map;
|
|
import com.fasterxml.jackson.core.JsonProcessingException;
|
import com.fasterxml.jackson.databind.JavaType;
|
import com.fasterxml.jackson.databind.ObjectMapper;
|
|
public class JsonUtils {
|
|
|
// 定义jackson对象
|
private static final ObjectMapper MAPPER = new ObjectMapper();
|
|
/**
|
* 将对象转换成json字符串。
|
* <p>Title: pojoToJson</p>
|
* <p>Description: </p>
|
* @param data
|
* @return
|
*/
|
public static String objectToJson(Object data) {
|
try {
|
String string = MAPPER.writeValueAsString(data);
|
return string;
|
} catch (JsonProcessingException e) {
|
e.printStackTrace();
|
}
|
return null;
|
}
|
|
/**
|
* 将json结果集转化为对象
|
*
|
* @param jsonData json数据
|
* @param beanType 对象中的object类型
|
* @return
|
*/
|
public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {
|
try {
|
T t = MAPPER.readValue(jsonData, beanType);
|
return t;
|
} catch (Exception e) {
|
e.printStackTrace();
|
}
|
return null;
|
}
|
|
/**
|
* 将json数据转换成pojo对象list
|
* <p>Title: jsonToList</p>
|
* <p>Description: </p>
|
* @param jsonData
|
* @param beanType
|
* @return
|
*/
|
public static <T>List<T> jsonToList(String jsonData, Class<T> beanType) {
|
JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);
|
try {
|
List<T> list = MAPPER.readValue(jsonData, javaType);
|
return list;
|
} catch (Exception e) {
|
e.printStackTrace();
|
}
|
|
return null;
|
}
|
|
|
public static Map<String, Object> objectToMap(Object obj) throws Exception {
|
if(obj == null)
|
return null;
|
|
Map<String, Object> map = new HashMap<String, Object>();
|
|
BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
|
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
|
for (PropertyDescriptor property : propertyDescriptors) {
|
String key = property.getName();
|
if (key.compareToIgnoreCase("class") == 0) {
|
continue;
|
}
|
Method getter = property.getReadMethod();
|
Object value = getter!=null ? getter.invoke(obj) : null;
|
map.put(key, value);
|
}
|
|
return map;
|
}
|
|
}
|