转换列表<String>列出<Employee>或列表<MyCustomClass>

Question

I am getting a List as output from my database, which is like json array. I want to convert the same into List using java 8. I am trying to use the below code snippet but it gives me compilation error. Cannot convert from List to List

List<String> employeeList = getEmployeeList();
return (List<Employee>) employeeList;

Sample json array

 {"employees":[    
        {"name":"Ram", "email":"ram@gmail.com", "age":23},    
        {"name":"Shyam", "email":"shyam23@gmail.com", "age":28},  
        {"name":"John", "email":"john@gmail.com", "age":33},    
        {"name":"Bob", "email":"bob32@gmail.com", "age":41}   
    ]} 

Answer 1

You can use the Jackson objectMapper to achieve that:

ObjectMapper mapper = new ObjectMapper();
List<Employee> employeeList = mapper.readValue(yourJsonString, new TypeReference<List<Employee>>(){});

Note that yourJsonString is your json data