Json串转化成list的两种方法

方法一：采用jaskson的jar包

public static <T> List<T> getObjectsFromJson(String in, Class<T> clsT) throws IOException {

JsonParser parser = objectMapper.getJsonFactory().createJsonParser(in);

JsonNode nodes = parser.readValueAsTree();

List<T> list = new ArrayList<T>(nodes.size());

for(JsonNode node : nodes){

list.add(objectMapper.readValue(node, clsT);

}

}

其中objectMapper一般是这样定义的：

ObjectMapper objectMapper = new ObjectMapper();

也可以这样

JsonUtils.getObjectMapper();

方法二：采用json-lib的jar包

public static <T> List<T> getObjectsFromJson(String in, Class<T> clsT) throws IOException {

JSONArray ja = JSONArray.fromObject(in);

List<T> list = new ArrayList<T>(ja.size());

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

T t = objectMapper.readValue(ja.getString(i), T);

list.add(t);

}

}