map與實體類互轉DTO、VO互轉

互轉的前提是屬性名相同，如果屬性名不同，又要互轉，只能自已手寫工具類了

1、pom

<dependency>
    <groupId>commons-beanutils</groupId>
    <artifactId>commons-beanutils</artifactId>
    <version>1.9.4</version>
</dependency>

2、map轉實體類，如果屬性里有list會出錯

Map<String, String> of = ImmutableMap.of("a", "aaaaa", "b", "kluowejbbbb");
Student student = new Student();
BeanUtils.copyProperties(student,of);

DTO轉VO

StudentVO studentVO = new StudentVO();
studentVO.setAge("sdfsafd");
studentVO.setStudentName("jkljsie");

StudentDTO studentDTO = new StudentDTO();
BeanUtils.copyProperties(studentDTO, studentVO);
System.out.println("studentDTO = " + studentDTO);   // {studentName='jkljsie', age='sdfsafd'}

DTO轉map，如果屬性里有list會出錯

StudentVO studentVO = new StudentVO();
studentVO.setAge(12);
studentVO.setStudentName("jkljsie");
Map<String, String> describe = BeanUtils.describe(studentVO); // 如果屬性里有list會出錯

 

也可以用fastjson去轉換

1、pom

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.69</version>
</dependency>

2、先成轉json再轉成dto

StudentVO studentVO = new StudentVO(12,"aaaaaa");
String s = JSONObject.toJSONString(studentVO);
StudentDTO studentDTO = JSONObject.parseObject(s, StudentDTO.class);

System.out.println("studentDTO = " + studentDTO);  // {studentName='aaaaaa', age='12'}


// 轉成map
Map<String,String> hashMap = JSONObject.parseObject(map, HashMap.class);