java前后端分离使用注解优雅的返回实体部分属性
#第一个注解
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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();
}
#第二个注解
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
*/无锡做人流手术多少钱 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 = “查询详情”, 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("查询详情异常：===》 " + e);
return Message.exception(e.getMessage());
}
}
#filter：排除某些属性
#include ：包括某些属性
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