JSON数据解析的有点在于他的体积小,在网络上传输的时候可以更省流量,所以使用越来越广泛,下面介绍使用JsonObject和JsonArray的两种方式解析Json数据。
使用以上两种方式解析json均需要依赖json-lib.jar开发包使用依赖包
1、JsonObject
使用JsonObject解析只有一条数据的json是非常方便的例如:"{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"[email protected]\"}"
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public static void main(String[] args) {
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String jsonString =
"{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"[email protected]\"}";
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JSONObject json = JSONObject.fromObject(jsonString);
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User user =
new User();
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user.setName(json.getString(
"name"));
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user.setPassword(json.getString(
"password"));
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user.setEmail(json.getString(
"email"));
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System.out.println(user.toString());
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}
2、JsonArray
使用JsonArray解析数组数据的json是非常方便的例如:"[{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"[email protected]\"},{\"name\":\"lisi\",\"password\":\"lisi123\",\"email\":\"[email protected]\"}]"
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String json = "color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">
"[{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"[email protected]\"},51,
51,
51); font-family: Arial; font-size:
14px; line-height:
26px;
">{\"name\":\"lisi\",\"password\":\"lisi123\",\"email\":\"[email protected]\"}51,
51,
51); font-family: Arial; font-size:
14px; line-height:
26px;
">]";
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JSONArray jsonArray = JSONArray.fromObject(json);
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ArrayList
users =
new ArrayList();
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for (
int i =
0; i < jsonArray.size(); i++) {
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User userM =
new User();
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user.setName(jsonArray.getJSONObject(i).getString(
"name"));
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user.setpassword(jsonArray.getJSONObject(i).getString(
"password"));
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user.setEmail(jsonArray.getJSONObject(i).getString(
"email"));
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users.add(user);
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}
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for (User user : users) {
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System.out.println(user.toString());
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}