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项目中经常需要调用指定服务的接口，并且对返回的json结果数据，进行反序列化生成java类。
若是返回的数据格式固定，那么直接按照固定的格式进行反序列化生成java类便可。但是由于
返回的结果数据格式不固定，需要自己编写反序列化类进行分析。
下面我讲展示下项目中遇到的情况。
我要评论{
"status": "200",
"goal": {
"userid": "17090016",
"templateid": "26",
"templatename": "测试-营销通用目标模板",
"performance": [
{
"id": "8022",
"indexcode": "",
"name": "执行绩效综合达成率",
"category": "new category",
"categoryname": "执行绩效",
"start": "2019-10-01t00:00:00.000",
"due": "2019-10-31t00:00:00.000",
"bizxtarget": "",
"bizxactual": "",
"done": "0.0",
"higedone": "",
"statelabel": "重大延迟",
"weight": "",
"datasource": "",
"lastmodified": "2019-12-11t08:45:47.000",
"modifier": "17090016",
"children": ""
},
{
"id": "8015",
"indexcode": "",
"name": "协访达成率",
"category": "goals",
"categoryname": "先决条件",
"start": "2019-10-01t00:00:00.000",
"due": "2019-10-31t00:00:00.000",
"bizxtarget": "47.0",
"bizxactual": "73.0",
"done": "0.0",
"higedone": "100.0",
"statelabel": "重大延迟",
"weight": "",
"datasource": "手持",
"lastmodified": "2019-12-11t13:57:09.000",
"modifier": "17090016",
"children":
{
"childdescription": "cs协访",
"childtarget": "15",
"childactual": "18",
"childdone": "100.0"
}
},
{
"id": "8017",
"indexcode": "",
"name": "分销达成率",
"category": "new category",
"categoryname": "执行绩效",
"start": "2019-10-01t00:00:00.000",
"due": "2019-10-31t00:00:00.000",
"bizxtarget": "100.0",
"bizxactual": "23.39",
"done": "23.39",
"higedone": "100.0",
"statelabel": "重大延迟",
"weight": "20.0",
"datasource": "订单管理",
"lastmodified": "2019-12-11t14:09:32.000",
"modifier": "17090016",
"children": [
{
"childdescription": "门店数",
"childtarget": "",
"childactual": "23",
"childdone": ""
},
{
"childdescription": "门店品类数",
"childtarget": "",
"childactual": "31",
"childdone": ""
},
{
"childdescription": "门店sku",
"childtarget": "",
"childactual": "25",
"childdone": ""
}
]
}
}
上面的json格式数据中，其余的字段格式都是比较的固定，但是可以看到children的数据内容出现了3种：
1、字符串内容
2、对象
3、数组
由于children的内容格式不固定，则直接利用jackson进行反序列化会失败，所以需要我们自己编写反序列化的实现类。
但是只是children的内容格式不固定，我们只是需要对children编写反序列化的实现类。
代码如下；
整个json对应的javabean
package com.shinho.plrs.front.pojo;
import com.fasterxml.jackson.annotation.jsongetter;
import com.fasterxml.jackson.annotation.jsonignoreproperties;
import com.fasterxml.jackson.annotation.jsonproperty;
import com.fasterxml.jackson.annotation.jsonsetter;
import com.fasterxml.jackson.databind.annotation.jsondeserialize;
import io.swagger.annotations.apimodel;
import io.swagger.annotations.apimodelproperty;
import lombok.data;
import java.util.list;
@data
@apimodel("指标")
@jsonignoreproperties(ignoreunknown = true)
public class target {
@apimodelproperty("id")
string id;
@apimodelproperty("指标编码")
string code;
@jsongetter("code")
public string getcode() {
return this.code;
}
@jsonsetter(value = "indexcode")
public void setcode(string code) {
this.code = code;
}
@apimodelproperty("指标名称")
string purpose;
@apimodelproperty("指标类型编码")
string category;
@apimodelproperty("指标类型名称")
string categoryname;
@jsonproperty("start")
@apimodelproperty("开始日期")
string startdate;
@jsonproperty("due")
@apimodelproperty("结束日期")
string enddate;
@apimodelproperty("目标")
string aim;
@apimodelproperty("实际")
string acture;
@apimodelproperty("达成率")
string done;
@apimodelproperty("达成率封顶值")
string higedone;
@apimodelproperty("状态（文本）")
string statelabel;
@apimodelproperty("权重")
string weight;
@apimodelproperty("数据来源")
string datasource;
@apimodelproperty("最近修改时间")
string lastmodified;
@apimodelproperty("修改人")
string modifier;
// @apimodelproperty("子指标数据")
// list<child> childs = new arraylist<>();
@apimodelproperty("子指标数据")
@jsondeserialize(using = childrendeserializer.class)
list<child> children;
}
package com.shinho.plrs.front.pojo;
import io.swagger.annotations.apimodel;
import io.swagger.annotations.apimodelproperty;
import lombok.data;
import lombok.experimental.accessors;
@data
@apimodel("子指标")
@accessors(chain = true)
public class child {
@apimodelproperty("子指标描述")
string childdescription;
@apimodelproperty("子指标目标")
string childtarget;
@apimodelproperty("子指标完成值")
string childactual;
@apimodelproperty("子指标达成率")
string childdone;
}
反序列化类的实现：
package com.shinho.plrs.front.pojo;
import com.fasterxml.jackson.core.jsonparser;
import com.fasterxml.jackson.core.jsontoken;
import com.fasterxml.jackson.databind.deserializationcontext;
import com.fasterxml.jackson.databind.deser.std.stddeserializer;
import lombok.extern.slf4j.slf4j;
import org.springframework.beans.beanutils;
import org.springframework.util.stringutils;
import java.io.ioexception;
import java.util.arraylist;
import java.util.list;
@slf4j
public class childrendeserializer extends stddeserializer<list<child>> {
public childrendeserializer() {
super(list.class);
}
public childrendeserializer(class<?> vc) {
super(vc);
}
@override
public list<child> deserialize(jsonparser parser, deserializationcontext deserializer) throws ioexception {
list<child> list = new arraylist<>();
if (stringutils.isempty(parser.gettext())) return list;
if (jsontoken.start_array.equals(parser.getcurrenttoken())) {
while (!jsontoken.end_array.equals(parser.getcurrenttoken())) {
list.add(parsejsonobjecttochild(parser));
parser.nexttoken();
}
} else if (jsontoken.start_object.equals(parser.getcurrenttoken())) {
list.add(parsejsonobjecttochild(parser));
}
return list;
}
/**
* 将json数据分析成java对象
*
* @param parser
* @return
*/
private child parsejsonobjecttochild(jsonparser parser) throws ioexception {
child child = new child();
jsontoken token = parser.getcurrenttoken();
string fieldname = null;
while (!jsontoken.end_object.equals(token)) {
if (!jsontoken.field_name.equals(token)) {
token = parser.nexttoken();
continue;
}
fieldname = parser.getcurrentname();
token = parser.nexttoken();
try {
beanutils.getpropertydescriptor(child.class, fieldname).getwritemethod().invoke(child, parser.gettext());
token = parser.nexttoken();
} catch (exception e) {
log.error("反序列化child过程中，出现异常：", e);
}
}
return child;
}
}
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