Json与bean互转的例子

第一种： public  class  JsonToJavaBean {
    public  static  void  main(String[] args) {
        String str= "{\"student\":[{\"name\":\"leilei\",\"age\":23},{\"name\":\"leilei02\",\"age\":23}]}" ;
        Student stu =  null ;
        List<Student> list =  null ;
        try  {
            ObjectMapper objectMapper= new  ObjectMapper();
            StudentList studentList=objectMapper.readValue(str, StudentList. class );

            list=studentList.getStudent();
        }  catch  (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        for (Student s:list){
            System.out.println(s.getName()+ "   " +s.getAge());
        }
    }

}
第二种：


public  static  void  main(String[] args) {
        ArrayList<Student> list= new  ArrayList<Student>();
        Student s1= new  Student();
        s1.setName( "leilei" );
        s1.setAge( 23 );
        Student s2= new  Student();
        s2.setName( "leilei02" );
        s2.setAge( 23 );
        list.add(s1);
        list.add(s2);

        StringWriter str= new  StringWriter();

        ObjectMapper objectMapper= new  ObjectMapper();
        try  {
            objectMapper.writeValue(str, list);
        }  catch  (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println(str);
    }