fastjson List String JSONArray 转换

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三种转换方法

String courseData = "...";
List<Course> courseTable;
courseTable = JSON.parseObject(courseData, new TypeReference<List<Course>>() {});
courseTable = JSON.parseArray(courseData, Course.class);
courseTable = JSON.parseArray(courseData).toJavaList(Course.class);
System.out.println(courseTable);

其中，第三种方法：

Code

// List
List<Course>  courseTable = new LinkedList<>();
courseTable.add(new Course("1", "Java", 30, 3.0));
courseTable.add(new Course("2", "JavaScript", 25, 2.5));
System.out.println(courseTable);

// List -> String
String str = JSON.toJSONString(courseTable);
System.out.println(str);

// String -> JSONArray
JSONArray objects = JSON.parseArray(str);
System.out.println(objects);

// JSONArray -> List
List<Course> courses = objects.toJavaList(Course.class);
System.out.println(courses);

输出

[{"course":"Java","credit":3.0,"id":"1","number":30}, {"course":"JavaScript","credit":2.5,"id":"2","number":25}]
[{"course":"Java","credit":3.0,"id":"1","number":30},{"course":"JavaScript","credit":2.5,"id":"2","number":25}]
[{"number":30,"course":"Java","id":"1","credit":3.0},{"number":25,"course":"JavaScript","id":"2","credit":2.5}]
[{"course":"Java","credit":3.0,"id":"1","number":30}, {"course":"JavaScript","credit":2.5,"id":"2","number":25}]