根据json生成Java类
1. JSON生成java源码
体力活干多了, 就会思考怎么来提高效率了.
最近有个项目需要和第三方对接, 生成API实体很多且本质就是体力活.
遂思考: 大佬们应该也有这个困惑. 正所谓“前人栽树后人乘凉”, 只要能描述清楚自己诉求, 往上一搜一大堆.
结合自己的现状, 使用maven插件生成最方便. 下面开始jsonschema2pojo-maven-plugin这个插件的快速入门.
2. 引入依赖
引入唯一的依赖commons-lang
<dependency><groupId>commons-lang</groupId><artifactId>commons-lang</artifactId><version>2.6</version></dependency>
添加plugin
<plugin><groupId>org.jsonschema2pojo</groupId><artifactId>jsonschema2pojo-maven-plugin</artifactId><version>0.4.34</version><configuration><sourceDirectory>${basedir}/src/main/resources</sourceDirectory><targetPackage>com.demo.bean</targetPackage><outputDirectory>${basedir}/src/main/java</outputDirectory><addCompileSourceRoot>false</addCompileSourceRoot><sourceType>json</sourceType><annotationStyle>none</annotationStyle></configuration><executions><execution><goals><goal>generate</goal></goals></execution></executions>
</plugin>
3. 指定目录
configuration配置说明:
主要关注configuration节点下面的配置项：
sourceDirectory:json文件所在的目录，会将该目录下所有json进行转换，不支持指定单个文件，如果不想全部转换，可以添加一个excludes节点。如：
<excludes><exclude>init.json</exclude>
</excludes>
targetPackage:生成的Java pojo类目标包名。outputDirectory:生成Java pojo类的（根）目录，换句话说，源文件最终目录为此目录+包目录，注意，此值默认为target\java-gen，官方配置中并没有该默认值，如果成功生成后发现找不到源文件，看一看是不是这个原因。addCompileSourceRoot:是否将输出目录作为项目的源码根目录。sourceType:json格式，两个可选值，jsonschema：json模式和json：json文件，默认为jsonschema，不过我们一般是希望直接使用json文件生成，所以指定为json`。annotationStyle:生成的（字段）注解样式，有五个可选值：jackson1、jackson2、gson、moshi1和none，默认是jackson2，一般指定none就可以了，还有比如用fastjson，那也要指定none。
4. 生产源代码
将json数据放到配置的sourceDirectory目录下
orderReq.json
{
"appid": "e3b19c2dcfff49dfa019dced4e4ee9e5",
"personnelId": "2067831",
"saleId": "105198",
"contactMobile": "13900000000",
"number": "17317810524",
"installedAddress": "江苏路500号",
"province": "上海市",
"city": "上海市",
"idCard": "340321000000000000",
"name": "张三",
"county": "长宁区",
"sign": "NTA3ZjVhMTlkMGU0Y2E1MTFkYzRjMzk5OTg4MjI5NTM="
}
直接执行mvn package打包命令就可以进行生成操作了，执行成功后你会在对应的包下面发现生成的java pojo源文件。
生成的Java类名就是json文件的文件名
public class OrderReq {private String appid;private String personnelId;private String saleId;private String contactMobile;private String number;private String installedAddress;private String province;private String city;private String idCard;private String name;private String county;private String sign;private Map<String, Object> additionalProperties = new HashMap<String, Object>();public String getAppid() {return appid;}public void setAppid(String appid) {this.appid = appid;}public String getPersonnelId() {return personnelId;}public void setPersonnelId(String personnelId) {this.personnelId = personnelId;}public String getSaleId() {return saleId;}public void setSaleId(String saleId) {this.saleId = saleId;}public String getContactMobile() {return contactMobile;}public void setContactMobile(String contactMobile) {this.contactMobile = contactMobile;}public String getNumber() {return number;}public void setNumber(String number) {this.number = number;}public String getInstalledAddress() {return installedAddress;}public void setInstalledAddress(String installedAddress) {this.installedAddress = installedAddress;}public String getProvince() {return province;}public void setProvince(String province) {this.province = province;}public String getCity() {return city;}public void setCity(String city) {this.city = city;}public String getIdCard() {return idCard;}public void setIdCard(String idCard) {this.idCard = idCard;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getCounty() {return county;}public void setCounty(String county) {this.county = county;}public String getSign() {return sign;}public void setSign(String sign) {this.sign = sign;}@Overridepublic String toString() {return ToStringBuilder.reflectionToString(this);}public Map<String, Object> getAdditionalProperties() {return this.additionalProperties;}public void setAdditionalProperty(String name, Object value) {this.additionalProperties.put(name, value);}
}
参考: https://codeantenna.com/a/pO5ix1igdi