自定义JSON返回字段

今天看到一篇文章，里面介绍了如何自定义返回json字段，感觉挺好用的，这里学习一下。

实现工具类：

/**
* @author fengzp
* @date 17/2/20上午10:34
* @email fengzp@gzyitop.com
* @company 广州易站通计算机科技有限公司
*/
public class JsonFilter {

private static final String INCLUDE = "JSON_INCLUDE";
private static final String EXCEPT = "JSON_EXCEPT";

@com.fasterxml.jackson.annotation.JsonFilter(INCLUDE)
interface MyJsonInclude {}

@com.fasterxml.jackson.annotation.JsonFilter(EXCEPT)
interface MyJsonExcept {}

public static String mapper(Object bean, Class<?> clazz, String include, String except) throws JsonProcessingException {

if(clazz == null)
return null;

ObjectMapper mapper = new ObjectMapper();

if(StringUtils.hasText(include)){
mapper.setFilterProvider(new SimpleFilterProvider().addFilter(INCLUDE,
SimpleBeanPropertyFilter.filterOutAllExcept(include.split(","))));

mapper.addMixIn(clazz, MyJsonInclude.class);
}

if(StringUtils.hasText(except)){
mapper.setFilterProvider(new SimpleFilterProvider().addFilter(EXCEPT,
SimpleBeanPropertyFilter.serializeAllExcept(except.split(","))));

mapper.addMixIn(clazz, MyJsonExcept.class);
}

return mapper.writeValueAsString(bean);
}

}

测试：

public class User {
private Integer id;

private String userName;

private String password;

private String realName;

private Boolean status;

private String email;

@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private Date createdAt;

@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private Date updatedAt;