解决json字符串序列化后的顺序问题

@Test

@SuppressWarnings ( "unchecked" )

public void facilitySoftwareQueryByPageExample() throws Exception {

  facilitySoftwareRepository.deleteAll();

  FacilitySoftwareConfig facilitySoftware = createFacilitySoftware();

  facilitySoftwareRepository.save(facilitySoftware);

  String userId = "1" ;

  int pageNumber = 1 ;

  int pageSize = 5 ;

  String facilities = objectMapper.writeValueAsString(facilitySoftware);

  LinkedHashMap<String, Object> jsonMap = JSON.parseObject(facilities,LinkedHashMap. class , Feature.OrderedField);

  JSONArray jsonArray = new JSONArray();

  JSONObject jsonObject = new JSONObject( true );

  jsonObject.putAll(jsonMap);

  jsonArray.add(jsonObject);

  this .mockMvc

   .perform(get( "/v1/facilitysoftware/userid/" + userId + "/page/" + pageNumber

     + "/pagesize/" + pageSize + "" ))

   .andExpect(status().isOk()).andExpect(jsonPath( "content" ,is(jsonArray)))

   .andExpect(jsonPath( "totalPages" , is( 1 )))

   .andExpect(jsonPath( "totalElements" , is( 1 )))

   .andExpect(jsonPath( "last" , is( true )))

   .andExpect(jsonPath( "number" , is( 0 )))

   .andExpect(jsonPath( "size" , is( 5 )))

   .andExpect(jsonPath( "numberOfElements" , is( 1 )))

   .andExpect(jsonPath( "first" , is( true )))

   .andDo(document( "facilitySoftware-query-example" ));

}

.andExpect(status().isOk()).andExpect(jsonPath( "content" ,is(jsonArray)))

JSONObject jsonObject = new JSONObject( true );

LinkedHashMap<String, Object> jsonMap = JSON.parseObject(facilities,LinkedHashMap. class , Feature.OrderedField);

JSONArray jsonArray = new JSONArray();

   JSONObject jsonObject = new JSONObject( true );

   jsonObject.putAll(jsonMap);

   jsonArray.add(jsonObject);

import com.alibaba.fastjson.JSONObject;

import com.alibaba.fastjson.serializer.PropertyFilter;

import com.alibaba.fastjson.serializer.SerializerFeature;

//创建学生对象

Student student = new Student();

student.setName( "小明" );

student.setSex( 1 );

student.setAge( 18 );

//序列化 json key按字典排序

System.out.println(JSONObject.toJSONString(student ,SerializerFeature.MapSortField));

//过滤不要的key age

  System.out.println(JSONObject.toJSONString(student , new PropertyFilter() {

    public boolean apply(Object source, String name, Object value) {

     if ( "age" .equals(name)) {

      return false ;

     }

     return true ;

    }

   }, SerializerFeature.MapSortField));

//学生类

import com.alibaba.fastjson.annotation.JSONField;

public class Student {

  private String name;

  private Integer sex;

  private Integer age;

  @JSONField (name = "Name" ) //用于序列化成json，key Name

  public String getName() {

   return name;

  }

  @JSONField (name = "Name" ) 用于json(Name)反序列化成学生对象

  public void setName(String name) {

   this .name = name;

  }

  public Integer getSex() {

   return sex;

  }

  public void setSex(Integer sex) {

   this .sex = sex;

  }

  public Integer getAge() {

   return age;

  }

  public void setAge(Integer age) {

   this .age = age;

  }

}

//学生类

import com.fasterxml.jackson.annotation.JsonProperty;

public class Student {

  @JsonProperty ( "Name" )

  private String name;

  private Integer sex;

  private Integer age;

  public String getName() {

   return name;

  }

  public void setName(String name) {

   this .name = name;

  }

  public Integer getSex() {

   return sex;

  }

  public void setSex(Integer sex) {

   this .sex = sex;

  }

  public Integer getAge() {

   return age;

  }

  public void setAge(Integer age) {

   this .age = age;

  }

}

//自己测试下

import com.fasterxml.jackson.databind.ObjectMapper;

import org.junit.Test;

@Test

public void test() throws Exception{

  Student student = new Student();

  student.setName( "小明" );

  ObjectMapper MAPPER = new ObjectMapper();

  //jackson序列化

  String json = MAPPER.writeValueAsString(student);

  System.out.println(json);

  //jackson反序列化

  Student student2 = MAPPER.readValue(json, Student. class );

  System.out.println(student2.getName());

}

//在学生类上加上这个

方式一：（已经过时的方法）

import com.fasterxml.jackson.databind.annotation.JsonSerialize;

@JsonSerialize (include = JsonSerialize.Inclusion.NON_NULL)

方式二：

import com.fasterxml.jackson.annotation.JsonInclude;

@JsonInclude (JsonInclude.Include.NON_NULL)

import com.fasterxml.jackson.databind.DeserializationFeature;

MAPPER.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false );

方式一：

@JsonIgnoreProperties ：该注解将在类曾级别上使用以忽略json属性。在下面的栗子中，我们将从albums的dataset中忽略[tag]属性；

@JsonIgnoreProperties ({ "tags" })

方式二：

@JsonIgnore ：该注释将在属性级别上使用以忽略特定属性；get方法上

@JsonIgnore

@JsonAlias ( "Name" )  反序列化时生效

private String name;

@JsonProperty ( "Name" ) 反序列化和序列化都时生效

private String name;