java前后端分離使用注解優雅的返回實體部分屬性

　　#第一個注解

　　import java.lang.annotation.ElementType;

　　import java.lang.annotation.Retention;

　　import java.lang.annotation.RetentionPolicy;

　　import java.lang.annotation.Target;

　　/**

　　* @Description:

　　* @Author: ckk

　　* @CreateDate: 2019/9/17 17:15

　　*/

　　@Target({ElementType.METHOD})

　　@Retention(RetentionPolicy.RUNTIME)

　　public @interface JSONS {

　　JSONField[] value();

　　}

　　#第二個注解

　　import java.lang.annotation.*;

　　/**

　　* @Description:

　　* @Author: ckk

　　* @CreateDate: 2019/9/17 17:16

　　*/

　　@Target({ElementType.METHOD})

　　@Retention(RetentionPolicy.RUNTIME)

　　@Repeatable(JSONS.class)

　　public @interface JSONField {

　　Class type();

　　String[] include() default {""};

　　String[] filter() default {""};

　　}

　　#解析器

　　import com.fasterxml.jackson.annotation.JsonFilter;

　　import com.fasterxml.jackson.core.JsonGenerator;

　　import com.fasterxml.jackson.databind.SerializerProvider;

　　import com.fasterxml.jackson.databind.ser.BeanPropertyFilter;

　　import com.fasterxml.jackson.databind.ser.FilterProvider;

　　import com.fasterxml.jackson.databind.ser.PropertyFilter;

　　import com.fasterxml.jackson.databind.ser.PropertyWriter;

　　import com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter;

　　import java.util.*;

　　/**

　　* @Description:

　　* @Author: ckk

　　* @CreateDate: 2019/9/17 17:19

　　*/

　　@JsonFilter("JacksonFilter")

　　public class JacksonJsonFilter extends FilterProvider {

　　Map, Set> includeMap = new HashMap();

　　Map, Set> filterMap = new HashMap();

　　public JacksonJsonFilter() {

　　}

　　public void include(Class type, String[] fields) {

　　this.addToMap(this.includeMap, type, fields);

　　}

　　public void filter(Class type, String[] fields) {

　　this.addToMap(this.filterMap, type, fields);

　　}

　　private void addToMap(Map, Set> map, Class type, String[] fields) {

　　Set fieldSet = (Set) map.getOrDefault(type, new HashSet());

　　fieldSet.addAll(Arrays.asList(fields));

　　map.put(type, fieldSet);

　　}

　　public BeanPropertyFilter findFilter(Object filterId) {

　　throw new UnsupportedOperationException("Access to deprecated filters not supported");

　　}

　　public PropertyFilter findPropertyFilter(Object filterId, Object valueToFilter) {

　　return new SimpleBeanPropertyFilter() {

　　public void serializeAsField(Object pojo, JsonGenerator jgen, SerializerProvider prov, PropertyWriter writer) throws Exception {

　　if (JacksonJsonFilter.this.apply(pojo.getClass(), writer.getName())) {

　　writer.serializeAsField(pojo, jgen, prov);

　　} else if (!jgen.canOmitFields()) {

　　writer.serializeAsOmittedField(pojo, jgen, prov);

　　}

　　}

　　};

　　}

　　public boolean apply(Class type, String name) {

　　Set includeFields = (Set) this.includeMap.get(type);

　　Set filterFields = (Set) this.filterMap.get(type);

　　if (includeFields != null && includeFields.contains(name)) {

　　return true;

　　} else if (filterFields != null && !filterFields.contains(name)) {

　　return true;

　　} else {

　　return includeFields == null && filterFields == null;

　　}

　　}

　　}

　　序列化器

　　import com.fasterxml.jackson.core.JsonProcessingException;

　　import com.fasterxml.jackson.databind.ObjectMapper;

　　import org.apache.commons.lang3.StringUtils;

　　/**

　　* @Description:

　　* @Author: ckk

　　* @CreateDate: 2019/9/17 17:18

　　*/無錫做人流手術多少錢 http://www.ytsg029.com/

　　public class CustomerJsonSerializer {

　　ObjectMapper mapper = new ObjectMapper();

　　JacksonJsonFilter jacksonFilter = new JacksonJsonFilter();

　　public CustomerJsonSerializer() {

　　}

　　public void filter(Class clazz, String[] include, String[] filter) {

　　if (clazz != null) {

　　if (include.length > 1 || include.length == 1 && org.apache.commons.lang3.StringUtils.isNotBlank(include[0])) {

　　this.jacksonFilter.include(clazz, include);

　　}

　　if (filter.length > 1 || filter.length == 1 && StringUtils.isNotBlank(filter[0])) {

　　this.jacksonFilter.filter(clazz, filter);

　　}

　　this.mapper.addMixIn(clazz, this.jacksonFilter.getClass());

　　}

　　}

　　public String toJson(Object object) throws JsonProcessingException {

　　this.mapper.setFilterProvider(this.jacksonFilter);

　　return this.mapper.writeValueAsString(object);

　　}

　　public void filter(JSONField json) {

　　this.filter(json.type(), json.include(), json.filter());

　　}

　　}

　　#使用方法

　　@ApiOperation(value = “查詢詳情”, response = ZcPolicyVo.class)

　　@GetMapping(“getById/{id}”)

　　@JSONS({@JSONField(type = ZcPolicyVo.class, filter = {“base_id”, “pic”, “mobilecontent”,

　　“synchtime”, “url”, “policy_originid”, “base_updatetime”, “tags”, “audittime”, “creator”}),

　　@JSONField(type = SysAreaVo.class, include = {“base_id”, “base_name”}),

　　@JSONField(type = SysCodeVo.class, include = {“base_id”, “base_name”}),

　　@JSONField(type = ZcRelationVo.class, include = {“keyId”, “keyIdName”}),

　　@JSONField(type = ImUsersVo.class, include = {“userid”, “username”}),

　　@JSONField(type = ZcCentraldeptcodeVo.class, include = {“codeId”, “codeIdName”}),

　　@JSONField(type = ZcLocaldeptcodeVo.class, include = {“codeId”, “codeIdName”}),

　　@JSONField(type = PolicyKeywordsVo.class, include = {“keyId”, “keyIdName”}),

　　@JSONField(type = PolicyMapKeywordsVo.class, include = {“keyId”, “keyIdName”}),

　　@JSONField(type = ZcKeywordVo.class, include = {“baseId”, “title”})

　　})

　　public Message getById(@PathVariable(“id”) String id) {

　　try {

　　ZcPolicy zcPolicy = zcPolicyJpaService.getObjectByPK(id);

　　return Message.success(BeanutilsCopy.convertBean(zcPolicy, ZcPolicyVo.class));

　　} catch (Exception e) {

　　logger.error("查詢詳情異常：===》 " + e);

　　return Message.exception(e.getMessage());

　　}

　　}

　　#filter：排除某些屬性

　　#include ：包括某些屬性