Java代码如何读取本地文件呢?

使用FileReader对象读取本地文件

/**
 * 读取本地JSON文件
 */
public static void readLocalFile() throws IOException {
    File file = new File("D:\\test\\maomao.json");
    FileReader fileReader = new FileReader(file);
    BufferedReader bufferedReader = new BufferedReader(fileReader);
    StringBuilder stringBuilder = new StringBuilder();
    String line;
    while ((line = bufferedReader.readLine()) != null) {
        stringBuilder.append(line);
    }
    bufferedReader.close();
    // 将StringBuilder转换为String
    String jsonString = stringBuilder.toString();
    // 这里可以使用JSON库如fastjson或Gson来解析jsonString
    JSONObject object = JSONObject.parseObject(jsonString);
    list<Test> dataList = JSON.parseArray(object.getString("data"), Test.class);
    for (Test gccs : dataList) {
        List<Test> resList = JSON.parseArray(gccs.getDatas(), Test.class);
        for (Test t : resList) {
            System.out.println(t);
        }
    }
}