fastjson生成各种格式json串

本文json的jar包，采用阿里云的fastjson
官方github下载地址：https://github.com/alibaba/fastjson

样式一：json对象

{
    "xxx": "xxx",
    "yyy": "yyy"
}

代码实现示例

JSONObject json = new JSONObject();
json.put("xxx","xxxx");
json.put("yyy","yyy");
String str = json.toJSONString();
// {"xxx":"xxx"};

###样式二：json数组包含对象

[{
    "xx": "xx",
    "yy": "yy"
}, {
    "xx": "yy",
    "yy": "yy"
}]

代码实现示例

String[] key = {"张三","李四","王五","田七"}
int[] value = {32,23,33,36}
JSONArray jsonArray = new JSONArray();
    for (int i = 0; i < keyName.length; i++) {
        JSONObject jsonObj = new JSONObject();
        jsonObj.put("name",key[i]);
        jsonObj.put("age",value[i]);
        jsonArray.add(jsonObj);
    }
String str = jsonArray.toJSONString();
// [{"name":"张三","age":32},{"name":"李四","age":23}...]

样式三：json对象包含数组

{
    "name": "xxx",
    "interfaces": [{
        "name": "yyy",
        "untagged": true
    }],
    "remark": "xxxxx"
}

代码实现示例

JSONObject json = new JSONObject();
json.put("name","vlan_apitest");

JSONObject inter = new JSONObject();
inter.put("name","1.2");
inter.put("untagged",true);
JSONArray jsonArr = new JSONArray();
jsonArr.add(inter);

json.put("interfaces",jsonArr);
json.put("remark",666);

String str = json.toJSONString();
// {"interfaces":[{"untagged":true,"name":"1.2"}],"name":"vlan_apitest","remark":666}

本想整理所有有可能出现的样式，写完这几个才发现很简单，也没啥必要继续整理了，就这样吧！