jsonString转map,list(JSONArray,JSONObject)

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#### 文章目录 ####

*   *  概要
     *  一、json转map
     *  二、json转list
     *  三、jsonString转JSONObject
     *  四、完整代码
     *  五、jsonString的字符串类型
     *  6、导入依赖
     *  7、JSONArray数组转JSONObject

### 概要 ###

由于在开发过程中从前端或者第三方接口请求的json数据过于复杂且太长导致直接转换数据显示异常，总结由jsonString转为java方便使用的数据。

### 一、json转map ###

//jsonString转map
    Map<String, String> jsonMap = 
    	JSON.parseObject(jsonString, 
    		new TypeReference<HashMap<String, String>>() {
        });
    //map转换成jsonString
    String jsonStr = JSON.toJSONString(jsonMap);

### 二、json转list ###

//json转list
    JSONArray jary = (JSONArray) json2.get("list");
    List<String> jsonArrayToStringList = 
    	JSONObject.parseArray(jary.toJSONString(),String.class);

### 三、jsonString转JSONObject ###

JSONObject json = (JSONObject) 
    	JSONObject.parseObject(jsonString);

### 四、完整代码 ###

import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONArray;
    import com.alibaba.fastjson.JSONObject;
    import com.alibaba.fastjson.TypeReference;
    
    public class testJson {
        
    	private static String jsonString = "{" + 
    			"    \"code\": \"0\"," + 
    			"    \"data\": {" + 
    			"        \"def1\": \"A\"," + 
    			"        \"def2\": \"B\"," + 
    			"        \"def3\": \"C\"," + 
    			"        \"def4\": \"D\"," + 
    			"        \"def5\": \"E\"," + 
    			"        \"list\": [" + 
    			"            {" + 
    			"                \"creationtime\": \"2023-12-16\"," + 
    			"                \"creator\": \"光头强\"," + 
    			"                \"edu\": \"xtu\"," + 
    			"                \"email\": false," + 
    			"                \"name\": \"熊二\"," + 
    			"                \"sex\": 1" + 
    			"            }" + 
    			"        ]" + 
    			"    }," + 
    			"    \"msg\": \"ok\"" + 
    			"}";
    	public static void main(String[] args) {
        
    		JSONObject json = (JSONObject) JSONObject.parseObject(jsonString);
    		JSONObject json2 = (JSONObject) JSONObject.parse(json.get("data").toString());
    		JSONArray jary = (JSONArray) json2.get("list");
    		List<String> jsonArrayToStringList = JSONObject.parseArray(jary.toJSONString(),String.class);
    		for(String str : jsonArrayToStringList) {
        
            	Map<String, String> jsonMap = JSON.parseObject(str, new TypeReference<HashMap<String, String>>() {
        
            	});
            	System.out.println(jsonMap.toString());
            }
    	}
    }

### 五、jsonString的字符串类型 ###

{
        
        "code": "0",
        "data": {
        
            "def1": "A",
    		"def2": "B",
    		"def3": "C",
    		"def4": "D",
    		"def5": "E",
            "list": [
                {
        
    				"edu": "xtu",
    				"email": false,
    				"sex": 1,
    				"name": "熊二",
    				"creator": "光头强",
    				"creationtime": "2023-12-16",
                }
            ]
        },
        "msg": "ok"
    }

### 6、导入依赖 ###

<dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>1.2.70</version>
            </dependency>

### 7、JSONArray数组转JSONObject ###

//基于完整代码
    JSONArray jary = (JSONArray) json2.get("list");
    JSONObject[] jsons = jary.toArray(new JSONObject[0]);