FastJson对于JSON格式字符串、JSON对象及JavaBean之间的相互转换操作

//json字符串-简单对象型
private static final String JSON_OBJ_STR = "{\"studentName\":\"lily\",\"studentAge\":12}";
//json字符串-数组类型
private static final String JSON_ARRAY_STR = "[{\"studentName\":\"lily\",\"studentAge\":12},{\"studentName\":\"lucy\",\"studentAge\":15}]";
//复杂格式json字符串
private static final String COMPLEX_JSON_STR = "{\"teacherName\":\"crystall\",\"teacherAge\":27,\"course\":{\"courseName\":\"english\",\"code\":1270},\"students\":[{\"studentName\":\"lily\",\"studentAge\":12},{\"studentName\":\"lucy\",\"studentAge\":15}]}"; 

 /**
 * json字符串-简单对象型与JSONObject之间的转换
 */
 public static void testJSONStrToJSONObject(){
 JSONObject jsonObject = JSON.parseObject(JSON_OBJ_STR);
 //JSONObject jsonObject1 = JSONObject.parseObject(JSON_OBJ_STR); //因为JSONObject继承了JSON，所以这样也是可以的
 System.out.println(jsonObject.getString("studentName")+":"+jsonObject.getInteger("studentAge"));
 }

 /**
 * json字符串-数组类型与JSONArray之间的转换
 */
 public static void testJSONStrToJSONArray(){
 JSONArray jsonArray = JSON.parseArray(JSON_ARRAY_STR);
 //JSONArray jsonArray1 = JSONArray.parseArray(JSON_ARRAY_STR);//因为JSONArray继承了JSON，所以这样也是可以的
 //遍历方式1
 int size = jsonArray.size();
 for (int i = 0; i < size; i++){
  JSONObject jsonObject = jsonArray.getJSONObject(i);
  System.out.println(jsonObject.getString("studentName")+":"+jsonObject.getInteger("studentAge"));
 }
 //遍历方式2
 for (Object obj : jsonArray) {
  JSONObject jsonObject = (JSONObject) obj;
  System.out.println(jsonObject.getString("studentName")+":"+jsonObject.getInteger("studentAge"));
 }
 }

 /**
 * 复杂json格式字符串与JSONObject之间的转换
 */
 public static void testComplexJSONStrToJSONObject(){
 JSONObject jsonObject = JSON.parseObject(COMPLEX_JSON_STR);
 //JSONObject jsonObject1 = JSONObject.parseObject(COMPLEX_JSON_STR);//因为JSONObject继承了JSON，所以这样也是可以的
 String teacherName = jsonObject.getString("teacherName");
 Integer teacherAge = jsonObject.getInteger("teacherAge");
 JSONObject course = jsonObject.getJSONObject("course");
 JSONArray students = jsonObject.getJSONArray("students");
 }

public class Student {
 private String studentName;
 private Integer studentAge;
 public String getStudentName() {
 return studentName;
 }
 public void setStudentName(String studentName) {
 this.studentName = studentName;
 }
 public Integer getStudentAge() {
 return studentAge;
 }
 public void setStudentAge(Integer studentAge) {
 this.studentAge = studentAge;
 }
}

public class Course {
 private String courseName;
 private Integer code;
 public String getCourseName() {
 return courseName;
 }
 public void setCourseName(String courseName) {
 this.courseName = courseName;
 }
 public Integer getCode() {
 return code;
 }
 public void setCode(Integer code) {
 this.code = code;
 }
}

public class Teacher {
 private String teacherName;
 private Integer teacherAge;
 private Course course;
 private List<Student> students;
 public String getTeacherName() {
 return teacherName;
 }
 public void setTeacherName(String teacherName) {
 this.teacherName = teacherName;
 }
 public Integer getTeacherAge() {
 return teacherAge;
 }
 public void setTeacherAge(Integer teacherAge) {
 this.teacherAge = teacherAge;
 }
 public Course getCourse() {
 return course;
 }
 public void setCourse(Course course) {
 this.course = course;
 }
 public List<Student> getStudents() {
 return students;
 }
 public void setStudents(List<Student> students) {
 this.students = students;
 }
}

 /**
 * json字符串-简单对象与JavaBean_obj之间的转换
 */
 public static void testJSONStrToJavaBeanObj(){
 Student student = JSON.parseObject(JSON_OBJ_STR, new TypeReference<Student>() {});
 //Student student1 = JSONObject.parseObject(JSON_OBJ_STR, new TypeReference<Student>() {});//因为JSONObject继承了JSON，所以这样也是可以的
 System.out.println(student.getStudentName()+":"+student.getStudentAge());
 }

/**
 * json字符串-数组类型与JavaBean_List之间的转换
 */
 public static void testJSONStrToJavaBeanList(){
 ArrayList<Student> students = JSON.parseObject(JSON_ARRAY_STR, new TypeReference<ArrayList<Student>>() {});
 //ArrayList<Student> students1 = JSONArray.parseObject(JSON_ARRAY_STR, new TypeReference<ArrayList<Student>>() {});//因为JSONArray继承了JSON，所以这样也是可以的
 for (Student student : students) {
  System.out.println(student.getStudentName()+":"+student.getStudentAge());
 }
 }

 /**
 * 复杂json格式字符串与JavaBean_obj之间的转换
 */
 public static void testComplexJSONStrToJavaBean(){

 Teacher teacher = JSON.parseObject(COMPLEX_JSON_STR, new TypeReference<Teacher>() {});
 //Teacher teacher1 = JSON.parseObject(COMPLEX_JSON_STR, new TypeReference<Teacher>() {});//因为JSONObject继承了JSON，所以这样也是可以的
 String teacherName = teacher.getTeacherName();
 Integer teacherAge = teacher.getTeacherAge();
 Course course = teacher.getCourse();
 List<Student> students = teacher.getStudents();
 }