wanglei
5 months ago
commit
a61f54f681
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package com.ruoyi.kaohe.util;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import org.json.JSONArray;
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import org.json.JSONObject;
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import java.math.BigDecimal;
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import java.util.*;
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public class JsonDeepMerge {
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/**
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* 深度合并json对象
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* @param target
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* @param source
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*/
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private static void deepMerge(JSONObject target, JSONObject source) {
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Iterator<String> keys = source.keys();
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while (keys.hasNext()) {
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String key = keys.next();
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Object sourceValue = source.get(key);
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if (target.has(key)) {
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Object targetValue = target.get(key);
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if (sourceValue instanceof JSONObject && targetValue instanceof JSONObject) {
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deepMerge((JSONObject) targetValue, (JSONObject) sourceValue);
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} else if (!targetValue.equals(sourceValue)) {
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target.put(key, sourceValue);
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}
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} else {
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target.put(key, sourceValue);
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}
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}
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}
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public static JSONArray mergeByKey(JSONArray array, String mergeKey) {
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JSONArray result = new JSONArray();
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for (int i = 0; i < array.length(); i++) {
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JSONObject current = array.getJSONObject(i);
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String keyValue = current.getString(mergeKey);
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boolean merged = false;
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for (int j = 0; j < result.length(); j++) {
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JSONObject existing = result.getJSONObject(j);
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if (existing.getString(mergeKey).equals(keyValue)) {
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deepMerge(existing, current);
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merged = true;
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break;
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}
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}
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if (!merged) {
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result.put(current);
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}
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}
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return result;
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}
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public static void main(String[] args) {
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String jsonStr = "[{\"khdx\":\"生命科学系\",\"jxdwldbzkhzf\":{\"ejdwmbglyjxkhcj\":{\"djyxzmbrw\":{\"khx1\":100,\"khx1_zb\":0.2,\"khx2\":0,\"khx2_zb\":0.1,\"khx3\":0,\"khx3_zb\":0.1,\"khx4\":0,\"khx4_zb\":0.1,\"khx5\":0,\"khx5_zb\":0.1,\"khx6\":0,\"khx6_zb\":0.1,\"khx7\":0,\"khx7_zb\":0.1,\"khx8\":0,\"khx8_zb\":0.1,\"khx9\":0,\"khx9_zb\":0.05,\"khx10\":97,\"khx10_zb\":0.1,\"khx11\":0,\"khx11_zb\":0.1},\"djyxzmbrw_df\":29.7,\"djyxzmbrw_zb\":0.1,\"djyxzmbrw_zsfs\":2.97}}},{\"khdx\":\"生命科学系\",\"jxdwldbzkhzf\":{\"ejdwmbglyjxkhcj\":{\"syfz\":{\"khx1\":0,\"khx1_zb\":0.3,\"khx2\":0,\"khx2_zb\":0.3,\"khx3\":0,\"khx3_zb\":0.4},\"syfz_df\":0,\"syfz_zb\":0.9,\"syfz_zsfs\":0}}},{\"khdx\":\"生命科学系\",\"jxdwldbzkhzf\":{\"mzcp\":{\"khx1\":{\"avgScore\":0,\"optionA\":0,\"optionB\":0,\"optionC\":0,\"optionD\":0,\"percentage\":0.3},\"khx2\":{\"avgScore\":0,\"optionA\":0,\"optionB\":0,\"optionC\":0,\"optionD\":0,\"percentage\":0.3},\"khx3\":{\"avgScore\":0,\"optionA\":0,\"optionB\":0,\"optionC\":0,\"optionD\":0,\"percentage\":0.4}},\"mzcp_df\":0,\"mzcp_zb\":0.3,\"mzcp_zsfs\":0}},{\"khdx\":\"生命科学系\",\"jxdwldbzkhzf\":{\"cx\":{\"khx1\":0},\"cx_df\":0}}]";
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JSONArray array = new JSONArray(jsonStr);
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JSONArray merged = mergeByKey(array, "khdx");
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System.out.println(merged.toString(2));
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}
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public static String jsonGroupSum(JSONArray jsonInput,String groupKey,String sumKey) throws JsonProcessingException {
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ObjectMapper mapper = new ObjectMapper();
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// 解析JSON数组为List<Map>
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List<Map<String, Object>> inputList = mapper.readValue(jsonInput.toString(2), List.class);
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// 使用Map按khdx分组并累加值
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Map<String, BigDecimal> sumMap = new HashMap<>();
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for (Map<String, Object> item : inputList) {
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String khdx = (String) item.get(groupKey);
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BigDecimal value=BigDecimal.ZERO;
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if(item.get(sumKey)!=null){ //非空判断
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value = new BigDecimal(item.get(sumKey).toString());
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}
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sumMap.merge(khdx, value, BigDecimal::add);
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}
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// 转换为目标结构List<Map>
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List<Map<String, Object>> result = new ArrayList<>();
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sumMap.forEach((khdx, sum) -> {
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Map<String, Object> entry = new HashMap<>();
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entry.put(groupKey, khdx);
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entry.put(sumKey, sum);
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result.add(entry);
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});
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// 输出结果JSON
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String jsonOutput = mapper.writeValueAsString(result);
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// System.out.println(jsonOutput);
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return jsonOutput;
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}
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}
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