SpringMVC解析Json字符串

不同第三方jar对json串的解析效果不同。

1. json包

<dependency>
　　<groupId>org.json</groupId>
　　<artifactId>json</artifactId>
　　<version>20160212</version>
　　<!-- 2018版本提供了JSONObject的toMap方法 -->
</dependency>

字符串变量名 data

import org.json.JSONArray;
import org.json.JSONObject;

        JSONArray arr = new JSONArray(data);
        Iterator<Object> i = arr.iterator();
        while(i.hasNext()){
            JSONObject obj = (JSONObject)i.next();
            System.out.println("-----------------------------------------------------------");
            Set<String> set = obj.keySet();
            Iterator<String> i2 = set.iterator();
            while(i2.hasNext()) {
                String key = i2.next();
                System.out.println(key+"\t"+obj.getString(key));
            }

        }

2.jackson

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.4</version>
</dependency>

字符串变量名 data

        ObjectMapper objMapper = new ObjectMapper();
        ArrayList<Map<String,Object>> list = objMapper.readValue(data,ArrayList.class);
        for(Map<String,Object> map : list) {
            Set<Map.Entry<String, Object>> set = map.entrySet();
            Iterator<Map.Entry<String, Object>> i = set.iterator();
            while(i.hasNext()) {
                Map.Entry<String, Object> entry = i.next();
                System.out.println(entry.getKey()+"\t"+entry.getValue());
            }
        }