Automatically generate entity tool classes under java oracle

public class CreateBeanAuto{
    
    
    private List<Map> columnList = new ArrayList<Map>();
    private Map<String, String> contentMap = new HashMap<String, String>();
    private static Map<String, String> dateTypeMap = new HashMap<String, String>();

    static {
    
    
        dateTypeMap.put("VARCHAR2", "String");
        dateTypeMap.put("CLOB", "String");
        dateTypeMap.put("NUMBER", "long");
        dateTypeMap.put("DATE", "Date");
        dateTypeMap.put("BLOB", "Blob");
    }

    public void create(String fileUrl, List<String> tableNameList, Map<String, String> entityName) {
    
    
        for (int i = 0; i < tableNameList.size(); i++) {
    
    
            String columnSql = "select column_name,data_type from user_tab_cols where table_name = upper('" + tableNameList.get(i) + "')";
            columnList = 根据自己的实际项目架构查询columnSql;
            contentMap.put("PACKAGE", "package com.hfits.util.entity;\r\r");
            contentMap.put("DATEIMPORT", "import java.util.Date;\r");
            contentMap.put("BLOBIMPORT", "import oracle.sql.BLOB;\r");
            contentMap.put("BASEIMPORT", "import org.nutz.dao.entity.annotation.Column;\r" +
                    "import org.nutz.dao.entity.annotation.Index;\r" +
                    "import org.nutz.dao.entity.annotation.Table;\r" +
                    "import org.nutz.dao.entity.annotation.TableIndexes;\r\r");
            contentMap.put("TABLE", "@Table(\"" + tableNameList.get(i).toUpperCase() + "\")\r");
            contentMap.put("TABLEINDEXES", "@TableIndexes({@Index(name = \"" + tableNameList.get(i).toUpperCase() + "_PK" + "\", fields = {\"id\"}, unique = false)})\r");
            contentMap.put("CLASSNAME", "public class " + entityName.get(tableNameList.get(i)) + " {\r");
            Map<String, String> columnMap = convert(columnList);
            String javaContent = contentMap.get("PACKAGE");
            if ("1".equals(columnMap.get("havingDATE"))) {
    
    
                javaContent += contentMap.get("DATEIMPORT");
            }

            if ("1".equals(columnMap.get("havingBLOB"))) {
    
    
                javaContent += contentMap.get("BLOBIMPORT");
            }

            columnMap.remove("havingDATE");
            columnMap.remove("havingBLOB");
            columnMap.remove("havingNUMBER");
            javaContent += contentMap.get("BASEIMPORT")
                    + contentMap.get("TABLE")
                    + contentMap.get("TABLEINDEXES")
                    + contentMap.get("CLASSNAME");

            String codeContent = "";
            String methodContent = "";
            for (Map.Entry<String, String> entry : columnMap.entrySet()) {
    
    
                String column = entry.getKey().toLowerCase();
                String columnDataType = entry.getValue();
                codeContent += "      @Column(\"" + column + "\")\r";

                codeContent += "      private " + dateTypeMap.get(columnDataType) + " " + column.replace("_","") + ";" +
                        "\r\r";

                methodContent += "      public " + dateTypeMap.get(columnDataType) + " get" + toUpperCaseFirstOne
                        (column).replace("_","") + "(){\r ";
                methodContent += "          return " + column.replace("_","") + ";\r";
                methodContent += "      }\r\r";
                methodContent += "      public " + dateTypeMap.get(columnDataType) + " set" + toUpperCaseFirstOne(column).replace("_","")  + "(" + dateTypeMap.get(columnDataType) + " " + column.replace("_","") + ") {\r";
                methodContent += "          this." + column.replace("_","") + " = " + column.replace("_","") + ";\r";
                methodContent += "          return " + column.replace("_","") + ";\r";
                methodContent += "      }\r\r";
            }
            javaContent += codeContent + methodContent + "}";
            String url = fileUrl + entityName.get(tableNameList.get(i)) + ".java";
            File file = new File(url);
            FileWriter fw = null;
            if (file.exists()) {
    
    
                file.delete();
            }
            if (!file.exists()) {
    
    
                try {
    
    
                    file.createNewFile();
                    fw = new FileWriter(file, true);
                } catch (IOException e) {
    
    
                    e.printStackTrace();
                }
            }
            PrintWriter pw = new PrintWriter(fw);
            pw.println(javaContent);
            pw.flush();
            try {
    
    
                fw.flush();
                pw.close();
                fw.close();
            } catch (IOException e) {
    
    
                e.printStackTrace();
            }
        }
    }

    private Map<String, String> convert(List<Map> columnList) {
    
    
        Map<String, String> result = new HashMap<String, String>();
        result.put("havingDATE", "0");
        result.put("havingBLOB", "0");
        for (Map map : columnList) {
    
    
            result.put(StringUtils.null2String(map.get("column_name")), StringUtils.null2String(map.get("data_type")));
            if ("DATE".equals(map.get("data_type"))) {
    
    
                result.put("havingDATE", "1");
            }
            if ("BLOB".equals(map.get("data_type"))) {
    
    
                result.put("havingBLOB", "1");
            }
        }
        return result;
    }

    // 首字母转大写
    private String toUpperCaseFirstOne(String s) {
    
    
        if (Character.isUpperCase(s.charAt(0))) {
    
    
            return s;
        } else {
    
    
            return (new StringBuilder()).append(Character.toUpperCase(s.charAt(0))).append(s.substring(1)).toString();
        }
    }
}
//测试
public String test() {
    
    
        Map<String, Object> response = new HashMap<String, Object>();
        List<String> tableNameList = new ArrayList<String>();
        tableNameList.add(表名);
        Map<String, String> entityName = new HashMap<String, String>();
        entityName.put(表名, 类名);
        createBeanAuto.create("H:\\test", tableNameList, entityName);
        response.put("code", "10000");
        response.put("msg", "创建实体类成功！");
        return JSON.toJSONString(response);
    }