Java智能JSON解析
2020-07-15 本文已影响0人
大风车__
GitHub:
Java:https://github.com/QiaokeZ/Java_AnyObjectMapper
Android:https://github.com/QiaokeZ/Android_AnyObjectMapper
iOS:https://github.com/QiaokeZ/iOS_AnyObjectMapper
前言
项目中有很多JavaBean类，少则5-10个，多则10-20个，其中大部分的字段都重复了，并且有些字段名称一样但类型不一样，导致不能重用，为了解决这些问题，写了个智能JSON解析，一个JavaBean类替代所有的类。
基本使用
public class CPU {
public String name;
public String codeName;
public String _package;
public String technology;
public String coreVID;
public String coreSpeed;
public String multiplier;
public String busSpeed;
public String ratedFSB;
public Integer cores;
public Integer threads;
public Number price;
}
public void jsonToBean() {
String json = "{\n" +
" \"name\": \"Intel Core i9-9900K\",\n" +
" \"codeName\": \"kaby Lake\",\n" +
" \"package\": \"Socket 1151 LGA\",\n" +
" \"technology\": \"14nm\",\n" +
" \"coreVID\": \"0.944V\",\n" +
" \"coreSpeed\": \"5000.00 MHz\",\n" +
" \"multiplier\": \"x 50.0(8 - 50)\",\n" +
" \"busSpeed\": \"100.00 MHz\",\n" +
" \"ratedFSB\": \"\",\n" +
" \"cores\": 8,\n" +
" \"threads\": 16,\n" +
" \"price\": 3949\n" +
"}";
Map<String, String> decodeCodingkeys = new HashMap();
decodeCodingkeys.put("_package", "package");
Serializer serializer = new Serializer();
serializer.setDecodeCodingkeys(decodeCodingkeys);
try {
CPU cpu = Mapper.decode(CPU.class, json, serializer);
System.out.println(cpu.name); //Intel Core i9-9900K
} catch (Exception e) {
e.printStackTrace();
}
}
public static void jsonArrayToBean() {
String json = "[\n" +
" {\n" +
" \"name\": \"Intel Core i5-9600K\",\n" +
" \"codeName\": \"kaby Lake\",\n" +
" \"package\": \"Socket 1151 LGA\",\n" +
" \"technology\": \"14nm\",\n" +
" \"coreVID\": \"0.944V\",\n" +
" \"coreSpeed\": \"5000.00 MHz\",\n" +
" \"multiplier\": \"x 50.0(8 - 50)\",\n" +
" \"busSpeed\": \"100.00 MHz\",\n" +
" \"ratedFSB\": \"\",\n" +
" \"cores\": 8,\n" +
" \"threads\": 16,\n" +
" \"price\": 1679\n" +
" },\n" +
" {\n" +
" \"name\": \"Intel Core i5-9600K\",\n" +
" \"codeName\": \"kaby Lake\",\n" +
" \"package\": \"Socket 1151 LGA\",\n" +
" \"technology\": \"14nm\",\n" +
" \"coreVID\": \"0.944V\",\n" +
" \"coreSpeed\": \"5000.00 MHz\",\n" +
" \"multiplier\": \"x 50.0(8 - 50)\",\n" +
" \"busSpeed\": \"100.00 MHz\",\n" +
" \"ratedFSB\": \"\",\n" +
" \"cores\": 8,\n" +
" \"threads\": 16,\n" +
" \"price\": 1679\n" +
" },\n" +
" {\n" +
" \"name\": \"Intel Core i5-9600K\",\n" +
" \"codeName\": \"kaby Lake\",\n" +
" \"package\": \"Socket 1151 LGA\",\n" +
" \"technology\": \"14nm\",\n" +
" \"coreVID\": \"0.944V\",\n" +
" \"coreSpeed\": \"5000.00 MHz\",\n" +
" \"multiplier\": \"x 50.0(8 - 50)\",\n" +
" \"busSpeed\": \"100.00 MHz\",\n" +
" \"ratedFSB\": \"\",\n" +
" \"cores\": 8,\n" +
" \"threads\": 16,\n" +
" \"price\": 1679\n" +
" },\n" +
" {\n" +
" \"name\": \"Intel Core i5-9600K\",\n" +
" \"codeName\": \"kaby Lake\",\n" +
" \"package\": \"Socket 1151 LGA\",\n" +
" \"technology\": \"14nm\",\n" +
" \"coreVID\": \"0.944V\",\n" +
" \"coreSpeed\": \"5000.00 MHz\",\n" +
" \"multiplier\": \"x 50.0(8 - 50)\",\n" +
" \"busSpeed\": \"100.00 MHz\",\n" +
" \"ratedFSB\": \"\",\n" +
" \"cores\": 8,\n" +
" \"threads\": 16,\n" +
" \"price\": 1679\n" +
" }\n" +
"]";
Map<String, String> decodeCodingkeys = new HashMap();
decodeCodingkeys.put("_package", "package");
Serializer serializer = new Serializer();
serializer.setDecodeCodingkeys(decodeCodingkeys);
try {
List<CPU> cpus = Mapper.decode(CPU.class, json, serializer);
CPU cpu = cpus.get(0);
System.out.println(cpu.name); //Intel Core i5-9600K
} catch (Exception e) {
e.printStackTrace();
}
}
高级使用
//将JSON有可能出现的key全部放进来
//不确定的类型用AnyObject
public class PublicBean {
public String price;
public String version;
public String name;
public AnyObject ID;
public AnyObject desc;
public AnyObject cpu;
public AnyObject memory;
public AnyObject graphics;
public AnyObject mainboard;
public AnyObject radiator;
public AnyObject hardDisk;
public AnyObject networkAdapter;
public AnyObject monitor;
public AnyObject keyboard;
public AnyObject mouse;
public AnyObject systems;
public AnyObject codeName;
public AnyObject _package;
public AnyObject technology;
public AnyObject coreVID;
public AnyObject coreSpeed;
public AnyObject multiplier;
public AnyObject busSpeed;
public AnyObject ratedFSB;
public AnyObject cores;
public AnyObject threads;
public AnyObject type;
public AnyObject size;
public AnyObject dramFrequency;
public AnyObject gpu;
public AnyObject coolingMode;
public AnyObject series;
public AnyObject model;
public AnyObject _interface;
public AnyObject resolution;
}
public static void testJSONToBean() {
String json = json = "{\n" +
" \"cpu\": {\n" +
" \"name\": \"Intel Core i9-9900K\",\n" +
" \"codeName\": \"kaby Lake\",\n" +
" \"package\": \"Socket 1151 LGA\",\n" +
" \"technology\": \"14nm\",\n" +
" \"coreVID\": \"0.944V\",\n" +
" \"coreSpeed\": \"5000.00 MHz\",\n" +
" \"multiplier\": \"x 50.0(8 - 50)\",\n" +
" \"busSpeed\": \"100.00 MHz\",\n" +
" \"ratedFSB\": \"\",\n" +
" \"cores\": 8,\n" +
" \"threads\": 16,\n" +
" \"price\": 3949\n" +
" },\n" +
" \"memory\": {\n" +
" \"name\": \"金士顿(Kingston)\",\n" +
" \"type\": \"288-Pin DDR4 UDIMM\",\n" +
" \"size\": \"64GB\",\n" +
" \"dramFrequency\": \"DDR4 3200\",\n" +
" \"price\": 2499\n" +
" },\n" +
" \"graphics\": {\n" +
" \"name\": \"蓝宝石 SAPPHIRE RX 5700 XT\",\n" +
" \"gpu\": \"AMD\",\n" +
" \"technology\": \"7nm\",\n" +
" \"price\": 3199\n" +
" },\n" +
" \"mainboard\": {\n" +
" \"name\": \"技嘉 GIGABYTE\",\n" +
" \"type\": \"Intel平台\",\n" +
" \"model\": \"Z390 GAMING X\",\n" +
" \"price\": 1298\n" +
" },\n" +
" \"radiator\": {\n" +
" \"name\": \"猫头鹰\",\n" +
" \"coolingMode\": \"风冷\",\n" +
" \"price\": 699\n" +
" },\n" +
" \"hardDisk\": {\n" +
" \"name\": \"三星（SAMSUNG）\",\n" +
" \"series\": \"970 EVO 系列\",\n" +
" \"model\": \"MZ-V7E500BW\",\n" +
" \"size\": \"1T\",\n" +
" \"price\": 1399\n" +
" },\n" +
" \"networkAdapter\": {\n" +
" \"name\": \"奋威（fenvi）FV-T919\",\n" +
" \"type\": \"双频网卡\",\n" +
" \"model\": \"FV-HB1200\",\n" +
" \"interface\": \"PCI-E接口\",\n" +
" \"price\": 238\n" +
" },\n" +
" \"monitor\": {\n" +
" \"name\": \"戴尔 DELL\",\n" +
" \"model\": \"U2720QM\",\n" +
" \"resolution\": \"3850x2160\",\n" +
" \"price\": 4199\n" +
" },\n" +
" \"keyboard\": {\n" +
" \"name\": \"Apple\",\n" +
" \"type\": \"无线键盘\",\n" +
" \"price\": 699\n" +
" },\n" +
" \"mouse\": {\n" +
" \"name\": \"Apple\",\n" +
" \"type\": \"无线键盘\",\n" +
" \"price\": 539\n" +
" },\n" +
" \"systems\": [\n" +
" {\n" +
" \"name\": \"macOS\",\n" +
" \"version\": \"10.15.4\"\n" +
" },\n" +
" {\n" +
" \"name\": \"windows8\",\n" +
" \"version\": \"8\"\n" +
" },\n" +
" {\n" +
" \"name\": \"windows10\",\n" +
" \"version\": \"10\"\n" +
" },\n" +
" {\n" +
" \"name\": \"CentOS\",\n" +
" \"version\": \"6.5\"\n" +
" },\n" +
" {\n" +
" \"name\": \"Ubuntu\",\n" +
" \"version\": \"4.8.2\"\n" +
" }\n" +
" ],\n" +
" \"name\": \"顶级硬件配置\",\n" +
" \"id\": \"EB17AA00-51C4-55BC-B863-8040ADA8DJ46\",\n" +
" \"desciption\": \"CPU:i9-9900K, 内存条:金士顿64GB, 显卡:蓝宝石RX5700XT\\n主板:技嘉Z390, 硬盘:三星970EVO 1T, 散热器:猫头鹰\"\n" +
"}";
Map<String, String> decodeCodingkeys = new HashMap();
decodeCodingkeys.put("_package", "package");
Serializer serializer = new Serializer();
serializer.setDecodeCodingkeys(decodeCodingkeys);
try {
//公共bean(PublicBean)的优缺点:
//优点：整个项目只需要一个bean
//缺点：取值时比较麻烦
PublicBean publicBean = Mapper.decode(PublicBean.class, json, serializer);
System.out.println(publicBean.name); //顶级硬件配置
System.out.println(publicBean.cpu.get(PublicBean.class).name); //Intel Core i9-9900K
System.out.println(publicBean.cpu.get(PublicBean.class).codeName.get(String.class)); //kaby Lake
} catch (Exception e) {
e.printStackTrace();
}
}
