获取assets下的数据

try {
    InputStreamReader isr = new InputStreamReader(App.get().getAssets().open("test.json"), "UTF-8");
    BufferedReader br = new BufferedReader(isr);
    String line;
    StringBuilder builder = new StringBuilder();
    while ((line = br.readLine()) != null) {
        builder.append(line);
    }
    br.close();
    isr.close();

    UserCredentialBean userCredentialBean = JSON.parseObject(builder.toString(), new TypeReference<UserCredentialBean>() {
    });
    int i = 0;
} catch (Exception e) {
    e.printStackTrace();
}