Java使用List<Map<K,V>>写复杂接口

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作为一名安卓程序猿，以前都是调用后台的接口，最近在学javaweb，自己给自己写接口，但是一个json对象我写起来很简单，或者一层数组写起来很简单，那么复杂的接口我就很费劲了，之前不太会，只能自己拼接，有时候还错误一堆堆。经过了群里的指导和自己的摸索，再难的接口我也不怕了，接下来我把代码贴上：

学生实体类：

import java.util.List;public class Student {private String name;private String sex;private int age;private List<GrilFriend> GfList;public String getName() {return name;}public List<GrilFriend> getGfList() {return GfList;}public void setGfList(List<GrilFriend> gfList) {GfList = gfList;}public void setName(String name) {this.name = name;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}

女朋友实体类：

public class GrilFriend {private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}private int age;}

main代码：

import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import com.google.gson.Gson;public class TestMap {static List<Map<String, Object>> userList;static List<Student> stulist;static List<GrilFriend> gfList;static List<GrilFriend> gfList2;public static void main(String args[]){//userList  一个装所有内容的ListuserList = new ArrayList<Map<String, Object>>();//stulist 学生属性的Liststulist = new ArrayList<Student>();Student stu;//学生实体类gfList = new ArrayList<GrilFriend>();//第一个学生拥有的女朋友的listgfList2 = new ArrayList<GrilFriend>();//第二个学生拥有的女朋友的list//给两位同学添加几个女朋友addGrilFriend();Map<String, Object> map = new HashMap<String, Object>();map.put("EmployeeCode", 111);map.put("EmployeeName", 222);map.put("PassWord", 333);map.put("CompanyID", 444);map.put("CompanyName", 555);map.put("BratchName", 666);map.put("MobilePhone", 777);map.put("MemberGuid", 888);if (map.containsKey("PassWord")) {System.out.println("存在PassWord");}else {System.out.println("不存在PassWord");}stu = new Student();stu.setAge(22);stu.setName("Billy Lu");stu.setSex("M");stu.setGfList(gfList);stulist.add(stu);stu = new Student();stu.setAge(23);stu.setName("Bruce Lu");stu.setSex("M");stu.setGfList(gfList2);stulist.add(stu);map.put("stu", stulist);userList.add(map);if (map.containsValue("Billy Lu")) {System.out.println("存在Billy Lu");}else {System.out.println("不存在Billy Lu");}System.out.println("lsit="+new Gson().toJson(userList));}private static void addGrilFriend() {GrilFriend gf;gf = new GrilFriend();gf.setName("鞠婧祎");gf.setAge(23);gfList.add(gf);gf = new GrilFriend();gf.setName("杨幂");gf.setAge(28);gfList.add(gf);gf = new GrilFriend();gf.setName("唐嫣");gf.setAge(25);gfList2.add(gf);gf = new GrilFriend();gf.setName("关晓彤");gf.setAge(20);gfList2.add(gf);}}

运行结果：

存在PassWord不存在Billy Lulsit=[{"CompanyName":555,"EmployeeCode":111,"CompanyID":444,"stu":[{"name":"Billy Lu","sex":"M","age":22,"GfList":[{"name":"鞠婧祎","age":23},{"name":"杨幂","age":28}]},{"name":"Bruce Lu","sex":"M","age":23,"GfList":[{"name":"唐嫣","age":25},{"name":"关晓彤","age":20}]}],"BratchName":666,"MemberGuid":888,"EmployeeName":222,"PassWord":333,"MobilePhone":777}]

格式化一下：

[    {        "CompanyName": 555,        "EmployeeCode": 111,        "CompanyID": 444,        "stu": [            {                "name": "Billy Lu",                "sex": "M",                "age": 22,                "GfList": [                    {                        "name": "鞠婧祎",                        "age": 23                    },                    {                        "name": "杨幂",                        "age": 28                    }                ]            },            {                "name": "Bruce Lu",                "sex": "M",                "age": 23,                "GfList": [                    {                        "name": "唐嫣",                        "age": 25                    },                    {                        "name": "关晓彤",                        "age": 20                    }                ]            }        ],        "BratchName": 666,        "MemberGuid": 888,        "EmployeeName": 222,        "PassWord": 333,        "MobilePhone": 777    }]

好了，楼主已经有这么多漂亮的女朋友了，好开心~~

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