java 解析json生成实体类

工具类

package com.myspringbootdemo.demo.todo;


import com.alibaba.fastjson.JSONObject;

import java.io.*;
import java.util.*;


/**
 * 读取JSON 生成实体类  一级一级生成
 * 2022/10/12 09:19  只生成最外围的
 * 2022/10/12 15:46  逐级生成
 */
public class ReadJSONGenerateEntityClass {
    private static final String JSONObjectString = "{\"date\":\"2022-10-10 22:23:30\",\"errorCode \":\"0 \",\"message \":\"操作成功 \",\"httpStatus \":200,\"obj\":{\"orderNumber \":\"393374805906554880 \",\"mailNumber \":\"SF1020127608391 \",\"resStatus \":2,\"dateClass\":{\"key1 \":\"value1 \",\"key2 \":\"value2 \",\"key3 \":{\"key11\":\"value11\",\"key22\":\"value22\",\"key33\":\"value33\"}},\"dateArray\":[{\"k11\":\"v11\",\"k12\":\"v12\"},{\"k12\":\"v12\",\"k22\":\"v22\"}]},\"oneDateArray\":[{\"onek11\":\"onev11\",\"onek12\":\"onev12\"},{\"onek12\":\"onev12\",\"onek22\":\"onev22\"}]}";
    public final static String PACKAGE_NAME = "【包名】";
    public final static String CLASS_NAME = "【类名】";
    public final static String IMPORT = "import";
    public final static String STRING_REMARKS = "【字段描述】";
    public final static String FIELD_NAME = "【类型】 【小写字段名】";
    public final static String FIELD_TYPE = "【类型】";
    public final static String GETTING = "get【大写字段名】";
    public final static String BIG = "【大写字段名】";
    public final static String SETTING = "set【大写字段名】";
    public final static String MIN = "【小写字段名】";
    public static void main(String[] args) {
        List<String> JSONFileContent = readFile(System.getProperty("user.dir"));
        String join = String.join("", JSONFileContent);
        System.out.println(join);
        String className = "TestGenerateEntityClass";
        String pathName= "./src/test/java/com/myspringbootdemo/demo/autogenerate/";
        String packagePath = "com.myspringbootdemo.demo.autogenerate";
        List<Map> fileList = new ArrayList<>();
        Map<String,Map> fileMap = new HashMap<>();
        // List<String> dateString = organizeData(JSONObjectString, className, packagePath);
        // System.out.println(fileList.size());
        // establishFile(className,pathName,dateString);
        // organize(fileList,JSONObjectString);
        // organize(fileMap,JSONObjectString,className);
        organize(fileMap,join,className);//
        for (String s : fileMap.keySet()) {
            String classNameStr = StringTest.upperTable(s.trim());
            List<String> dateString = newOrganizeData(fileMap.get(s), classNameStr, packagePath);
            establishFile(classNameStr,pathName,dateString);
        }




    }
    /**
     * 读取存储Json的文件
     */
    /**
     * 读取文件
     */
    private static List<String> readFile(String path) {
        List<String> fileList = new ArrayList<>();
        String fileName = path + "/src/main/resources/static/test.txt";
        System.out.println(fileName);
        //读取文件
        FileReader fileReader = null;
        String s = null;
        try {
            fileReader = new FileReader(fileName);
            //把文件存到缓冲区
            BufferedReader bufferedReader = new BufferedReader(fileReader);
            while((s = bufferedReader.readLine()) != null){
                fileList.add(s);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return fileList;
    }

    /**
     * 新的整理数据
     */
    public static List<String> newOrganizeData(Map zhiAndType , String className, String packagePath) {
        //最终的数据
        List<String> dateString = new ArrayList<>();
        //实体类字段
        List<String> fieldList = new ArrayList<>();
        //get set 器
        List<String> gettingAndSettingList = new ArrayList<>();

        List<String> template = TestGetTableStructure.getTemplate();
        String containsPackageNameStr = TestGetTableStructure.getStringByString(template, PACKAGE_NAME);
        String packageNameStr = containsPackageNameStr.replaceAll(PACKAGE_NAME, packagePath);
        dateString.add(packageNameStr);
        dateString.add("import java.util.Date;");
        dateString.add("import java.io.Serializable;");
        dateString.add("import java.util.List;");
        String containsClassNameStr = getStringByString(template, CLASS_NAME);
        String classNameStr = containsClassNameStr.replaceAll(CLASS_NAME, className);
        dateString.add(classNameStr);
        for (Object key : zhiAndType.keySet()) {
            // 类型
            Object value = zhiAndType.get(key);
            //首字母大写
            String s = StringTest.upperTable(String.valueOf(key));

            String containsFieldNameStr = getStringByString(template, FIELD_NAME);
            String fieldNameStr = containsFieldNameStr.replaceAll(FIELD_NAME, value + " " + key);
            if (String.valueOf(value).equals("HashMap")){
                fieldNameStr = containsFieldNameStr.replaceAll(FIELD_NAME, s + " " + key);
            }
            if(String.valueOf(value).equals("ArrayList")){
                fieldNameStr = containsFieldNameStr.replaceAll(FIELD_NAME, "List<" + s + "> " + key);
            }
            fieldList.add(fieldNameStr);

            // get构造器
            // public 【类型】 get【大写字段名】() { return 【小写字段名】; }
            generateGettingAndSetting(gettingAndSettingList, template, key, value, s, GETTING);

            // set构造器
            // public void set【大写字段名】(【类型】 【小写字段名】) { this.【小写字段名】 = 【小写字段名】; }
            generateGettingAndSetting(gettingAndSettingList, template, key, value, s, SETTING);
        }
        dateString.addAll(fieldList);
        dateString.addAll(gettingAndSettingList);
        dateString.add("}");
        return dateString;
    }

    private static void organize(List<Map> fileList,String jsonString) {
        Map map = TestJsonUtils.json2Map(jsonString);
        Map zhiAndType = new HashMap();
        for(Object key : map.keySet()){
            Object valeue = map.get(key);
            String type = TestAnalysisJSON.getTypeByObject(valeue);
            zhiAndType.put(key,type);
            if (type.equals("HashMap")){
                organize(fileList,new JSONObject((Map)valeue).toJSONString());
            }
            if (type.equals("ArrayList")){
                List<Map> list = (List) valeue;
                JSONObject jsonObject = new JSONObject(list.get(0));
                organize(fileList, jsonObject.toJSONString());
            }
        }
        fileList.add(zhiAndType);
    }

    public static void organize(Map<String,Map> fileMap,String jsonString,String name) {
        Map map = TestJsonUtils.json2Map(jsonString);
        Map zhiAndType = new HashMap();
        for(Object key : map.keySet()){
            Object valeue = map.get(key);
            String type = TestAnalysisJSON.getTypeByObject(valeue);
            zhiAndType.put(key,type);
            if (type.equals("HashMap")){
                organize(fileMap,new JSONObject((Map)valeue).toJSONString(),String.valueOf(key));
            }
            if (type.equals("ArrayList")){
                List<Map> list = (List) valeue;
                JSONObject jsonObject = new JSONObject(list.get(0));
                organize(fileMap, jsonObject.toJSONString(),String.valueOf(key));
            }
        }
        fileMap.put(name,zhiAndType);
    }

    /**
     * 整理数据
     * @param className 类名
     * @param packagePath 包路径
     */
    private static List<String> organizeData (String jsonObjectString, String className, String packagePath) {

        //最终的数据
        List<String> dateString = new ArrayList<>();
        //实体类字段
        List<String> fieldList = new ArrayList<>();
        //get set 器
        List<String> gettingAndSettingList = new ArrayList<>();

        List<String> template = TestGetTableStructure.getTemplate();
        Map map = TestJsonUtils.json2Map(jsonObjectString);
        // System.out.println(map);
        Set keySet = map.keySet();
        Map zhiAndType = new HashMap();
        for (Object key : keySet) {
            zhiAndType.put(key,TestAnalysisJSON.getTypeByObject(map.get(key)));
        }
        // System.out.println(zhiAndType);
        String containsPackageNameStr = TestGetTableStructure.getStringByString(template, PACKAGE_NAME);
        String packageNameStr = containsPackageNameStr.replaceAll(PACKAGE_NAME, packagePath);
        dateString.add(packageNameStr);
        dateString.add("import java.util.Date;");
        dateString.add("import java.io.Serializable;");
        dateString.add("import java.util.List;");
        String containsClassNameStr = getStringByString(template, CLASS_NAME);
        String classNameStr = containsClassNameStr.replaceAll(CLASS_NAME, className);
        dateString.add(classNameStr);
        for (Object key : zhiAndType.keySet()) {
            // 类型
            Object value = zhiAndType.get(key);
            //首字母大写
            String s = StringTest.upperTable(String.valueOf(key));

            String containsFieldNameStr = getStringByString(template, FIELD_NAME);
            String fieldNameStr = containsFieldNameStr.replaceAll(FIELD_NAME, value + " " + key);
            if (String.valueOf(value).equals("HashMap")){
                fieldNameStr = containsFieldNameStr.replaceAll(FIELD_NAME, s + " " + key);
            }
            if(String.valueOf(value).equals("ArrayList")){
                fieldNameStr = containsFieldNameStr.replaceAll(FIELD_NAME, "List<" + s + "> " + key);
            }
            fieldList.add(fieldNameStr);

            // get构造器
            // public 【类型】 get【大写字段名】() { return 【小写字段名】; }
            generateGettingAndSetting(gettingAndSettingList, template, key, value, s, GETTING);

            // set构造器
            // public void set【大写字段名】(【类型】 【小写字段名】) { this.【小写字段名】 = 【小写字段名】; }
            generateGettingAndSetting(gettingAndSettingList, template, key, value, s, SETTING);
        }
        dateString.addAll(fieldList);
        dateString.addAll(gettingAndSettingList);
        dateString.add("}");
        return dateString;
    }

    /**
     * 生成get 和 set 器
     * @param gettingAndSettingList get和set的存储List
     * @param template 模板
     * @param key 字段名
     * @param value 字段类型
     * @param s 字段类型首字母大写
     * @param setting 模板中的get或set
     */
    private static void generateGettingAndSetting(List<String> gettingAndSettingList, List<String> template, Object key, Object value, String s, String setting) {
        String str5 = getStringByString(template, setting);
        String str6 = str5.replaceAll(FIELD_TYPE, String.valueOf(value));
        String str7 = str6.replaceAll(BIG, s);
        String str8 = str7.replaceAll(MIN, String.valueOf(key));
        if (String.valueOf(value).equals("HashMap")){
            str5 = getStringByString(template, setting);
            str6 = str5.replaceAll(FIELD_TYPE, s);
            str7 = str6.replaceAll(BIG, s);
            str8 = str7.replaceAll(MIN, String.valueOf(key));
        }
        if (String.valueOf(value).equals("ArrayList")){
            str5 = getStringByString(template, setting);
            str6 = str5.replaceAll(FIELD_TYPE, "List<"+s+">");
            str7 = str6.replaceAll(BIG, s);
            str8 = str7.replaceAll(MIN, String.valueOf(key));
        }
        gettingAndSettingList.add(str8);
    }

    /**
     * 生成文件
     * @param className 文件名
     * @param pathName 文件地址
     * @param dateString 文件内容
     */
    public static void establishFile(String className, String pathName,List<String> dateString){
        //System.out.println(dateString);
        try {
            TestGetTableStructure.createFileAndPathAndWidth(pathName,className+".java",dateString);
        }catch (Exception e){
            System.out.println("异常了");
        }
    }

    public static File establishFile2(String className, String pathName,List<String> dateString){
        File fileAndPathAndWidth2=null;
        try {
            fileAndPathAndWidth2 = createFileAndPathAndWidth2(pathName, className + ".java", dateString);
        }catch (Exception e){
            System.out.println("异常了！");
        }
        return fileAndPathAndWidth2;
    }
    public static String getStringByString(List<String> template,String type){
        String str = "";
        for (String s : template) {
            if (s.contains(type)){
                str = s;
                return str;
            }
        }
        return str;
    }
    public static File createFileAndPathAndWidth2(String directoryPath,String fileName,List<String> dateString) throws Exception{
        File file = new File(directoryPath);
        if (!file.exists()){
            //创建文件夹
            if (file.mkdirs()){
                System.out.println("创建" + directoryPath + "成功");
            } else {
                System.out.println("创建" + directoryPath + "失败");
            }
        }
        String filePath = directoryPath + fileName;
        System.out.println("filePath::" + filePath);
        File file2 = new File(filePath);
        if (file2.exists()){
            System.out.println("该文件已存在,不能重复创建");
        } else {
            //创建文件
            if (file2.createNewFile()){
                System.out.println("文件创建成功");
                //写入内容
                BufferedWriter writer = new BufferedWriter(new FileWriter(filePath));
                for (String s : dateString) {
                    writer.write(s);
                    writer.write("\n");
                }
                writer.close();
            } else {
                System.out.println("文件创建失败");
            }
        }
        return file2;
    }
}