mirror of https://github.com/qiurunze123/miaosha
73 lines
1.8 KiB
Java
73 lines
1.8 KiB
Java
package com.geekq.common.utils;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.JavaType;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import java.util.List;
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/**
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* @Description: 自定义响应结构, 转换类
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*/
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public class JsonUtils {
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// 定义jackson对象
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private static final ObjectMapper MAPPER = new ObjectMapper();
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/**
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* 将对象转换成json字符串。
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* <p>Title: pojoToJson</p>
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* <p>Description: </p>
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*
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* @param data
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* @return
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*/
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public static String objectToJson(Object data) {
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try {
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String string = MAPPER.writeValueAsString(data);
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return string;
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} catch (JsonProcessingException e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 将json结果集转化为对象
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*
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* @param jsonData json数据
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* @param clazz 对象中的object类型
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* @return
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*/
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public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {
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try {
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T t = MAPPER.readValue(jsonData, beanType);
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return t;
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} catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 将json数据转换成pojo对象list
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* <p>Title: jsonToList</p>
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* <p>Description: </p>
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*
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* @param jsonData
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* @param beanType
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* @return
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*/
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public static <T> List<T> jsonToList(String jsonData, Class<T> beanType) {
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JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);
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try {
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List<T> list = MAPPER.readValue(jsonData, javaType);
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return list;
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} catch (Exception e) {
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e.printStackTrace();
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}
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return null;
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}
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}
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