引入pom.xml
xml
<!--velocity代码生成使用模板 -->
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.7</version>
</dependency>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-json</artifactId>
<version>5.8.20</version>
</dependency>WxJavaBean
java
import lombok.Data;
import java.util.List;
@Data
public class WxJavaBean {
private String className;
private String path;
private List<WxField> fields;
}WxField
java
import lombok.Data;
@Data
public class WxField {
private String path;
private Integer type;
private String jsonName;
private String javaName;
}java
java
import cn.hutool.core.io.FileUtil;
import cn.hutool.core.util.RandomUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSON;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import java.io.StringWriter;
import java.util.*;
public class AA {
public static void main(String[] args) {
String vmPathPre="D:\\xxxx\";
String vmPathSfx="vm-local\\wx-java\\bean.java.vm";
String packageName="com.xxx.wechat.dto.order.detail.rsp";
String fileName="D:\\xxxxxx\\src\\main\\java\\wechat\\dto\\order\\detail\\rsp";
//微信返回的json
String s="{}";
String baseNameDTO="OrderDetailDTO";
List<WxJavaBean> javaBeanFiles = new ArrayList<>();
Stack<String> fileNameStack = new Stack<>();
// fileNameStack.push("OrderDetail");
JSONObject jsonObject =null;
JSON parse = JSONUtil.parse(s);
String nowKeyPath=null;
do{
String pop = fileNameStack.isEmpty()?baseNameDTO: fileNameStack.pop();
// System.out.println(pop);
if(null==nowKeyPath && fileNameStack.isEmpty()){
nowKeyPath="";
}else {
nowKeyPath=pop+".";
}
if(null==jsonObject){
jsonObject = JSONUtil.parseObj(s);
}else {
String byPath = parse.getByPath(pop).toString();
int i = byPath.indexOf("{");
int length = byPath.length();
// System.out.println("byPath >> " + byPath);
String subStr = StrUtil.sub(byPath, i, length - i);
// System.out.println("subStr >> " + subStr);
try {
jsonObject =JSONUtil.parseObj(subStr);
} catch (Exception e) {
e.printStackTrace();
}
}
List<WxField> ll = new ArrayList<>();
for (Map.Entry<String, Object> entry : jsonObject.entrySet()) {
WxField wxField = new WxField();
String key = entry.getKey();
wxField.setPath(key);
String keyName=key;
if(keyName.contains(".")){
int i = key.lastIndexOf(".");
keyName = key.substring(i);
}
wxField.setJsonName(keyName);
wxField.setJavaName(StrUtil.toCamelCase(keyName));
Object value = entry.getValue();
if(value instanceof Integer){
wxField.setType(0);
} else if(value instanceof String){
wxField.setType(1);
} else if(value instanceof Boolean){
wxField.setType(2);
}else {
wxField.setType(3);
// System.out.println("push >>> "+nowKeyPath+key);
fileNameStack.push(nowKeyPath+key);
}
ll.add(wxField);
}
WxJavaBean wxJavaBean = new WxJavaBean();
wxJavaBean.setPath(pop);
String keyName=pop;
if(keyName.contains(".")){
int i = pop.lastIndexOf(".");
keyName = pop.substring(i+1);
}
wxJavaBean.setClassName(StrUtil.upperFirst(StrUtil.toCamelCase(keyName) ));
wxJavaBean.setFields(ll);
javaBeanFiles.add(wxJavaBean);
// System.out.println(ll);
}while (!fileNameStack.empty());
Properties p = new Properties();
// 加载classpath目录下的vm文件
p.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH,vmPathPre);
// 定义字符集
p.setProperty(Velocity.ENCODING_DEFAULT, "UTF-8");
p.setProperty(Velocity.OUTPUT_ENCODING, "UTF-8");
// 初始化Velocity引擎，指定配置Properties
Velocity.init(p);
for (WxJavaBean javaBeanFile : javaBeanFiles) {
System.out.println(String.format("key >>> %s , size >>> %d ",javaBeanFile.getPath(),javaBeanFile.getFields().size()) );
List<WxField> fields = javaBeanFile.getFields();
// 渲染模板
StringWriter sw = new StringWriter();
Template tpl = Velocity.getTemplate(vmPathSfx, "UTF-8");
VelocityContext velocityContext = new VelocityContext();
velocityContext.put("randomUID", RandomUtil.randomInt());
velocityContext.put("fields",fields);
velocityContext.put("ClassName",javaBeanFile.getClassName());
velocityContext.put("packageName",packageName);
tpl.merge(velocityContext, sw);
FileUtil.writeUtf8String(sw.toString(),fileName+"\\"+javaBeanFile.getClassName()+".java");
// System.out.println(sw.toString());
}
}
}
java
import lombok.Data;
import java.util.List;
@Data
public class WxJavaBean {
private String className;
private String path;
private List<WxField> fields;
}bean.java.vm
java
package ${packageName};
import cn.hutool.core.annotation.Alias;
import lombok.Data;
import java.io.Serializable;
import java.util.List;
@Data
public class ${ClassName} implements Serializable {
private static final long serialVersionUID = ${randomUID}L;
#foreach ($column in $fields)
@Alias("$column.jsonName")
private #if($column.type == 0
)Integer#elseif($column.type == 1
)String#elseif($column.type == 2
)Boolean#elseif($column.type == 3
)#set($AttrName=$column.javaName.substring(0,1).toUpperCase() + ${column.javaName.substring(1)}
)List<$AttrName>#end $column.javaName;
#end
}