JSON和对象集合之间的相互转化

╰半橙微兮° 2023-06-06 12:11 23阅读 0赞

所需jar包：

<dependency>
                <groupId>com.hynnet</groupId>
                <artifactId>json-lib</artifactId>
                <version>2.4</version>
            </dependency>
    
            
            <dependency>
                <groupId>commons-lang</groupId>
                <artifactId>commons-lang</artifactId>
                <version>2.5</version>
            </dependency>
            
            <dependency>
                <groupId>commons-beanutils</groupId>
                <artifactId>commons-beanutils</artifactId>
                <version>1.8.0</version>
            </dependency>
            
            <dependency>
                <groupId>commons-collections</groupId>
                <artifactId>commons-collections</artifactId>
                <version>3.2.1</version>
            </dependency>
            
            <dependency>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
                <version>1.1.1</version>
            </dependency>
            
            <dependency>
                <groupId>net.sf.ezmorph</groupId>
                <artifactId>ezmorph</artifactId>
                <version>1.0.6</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>1.2.47</version>
            </dependency>

实例:

//集合生成
            User user1 = new User("a","aa");
            User user2 = new User("b","bb");
            List<User> list = new ArrayList<User>();
            list.add(user1);
            list.add(user2);
    
            //对象转json
            JSONObject jsonObject = JSONObject.fromObject(user1);
            String str = jsonObject.toString();
            System.out.print(str);
    
           //json转对象
            String JSONStr = JSON.toJSONString(str);
            User user = JSON.parseObject(str,new TypeReference<User>(){});
    
    
            //集合转json字符串
            JSONArray json = JSONArray.fromObject(list);
            String str = json.toString();
            System.out.print(str);
    
            //json字符串转集合
            String JSONStr = JSON.toJSONString(str);
            List<User> busLineList = JSON.parseObject(str,new TypeReference<List<User>>(){});