java中JSONArray、JSONObject、List、String之间的转换「建议收藏」

大家好，又见面了，我是你们的朋友全栈君。

一、JASSONArray转为JSONObject

JSONArray result_type = new JSONArray();

StringBuffer cdsIdxType = new StringBuffer();

cdsIdxType.append(” select id from table_type “);

result_type = jdbcTemp.queryForJSONArray(cdsIdxType.toString());

JSONObject jsonObject = (JSONObject) result_type.get(i);

二、JASONArray转为List

JSONArray result_type = new JSONArray();

StringBuffer cdsIdxType = new StringBuffer();

cdsIdxType.append(” select id from table_type “);

result_type = jdbcTemp.queryForJSONArray(cdsIdxType.toString());

ArrayList list_type = new ArrayList();

for (int i = 0; i < result_type.size(); i++) {

JSONObject jsonObject = (JSONObject) result_type.get(i);

list_type.add(jsonObject.get(“id”));

}

三、JSONArray转为String

JSONArray result_type = new JSONArray();

StringBuffer cdsIdxType = new StringBuffer();

cdsIdxType.append(” select id from table_type “);

result_type = jdbcTemp.queryForJSONArray(cdsIdxType.toString());

String typeAll = “”;

ArrayList list_type = new ArrayList();

for (int i = 0; i < result_type.size(); i++) {

JSONObject jsonObject = (JSONObject) result_type.get(i);

list_type.add(jsonObject.get(“id”)); }

for(int j=0;j