通过java反射实现对javabean生成各种sql语句，有请大家评论，更改
package com.pdt.util;import java.lang.reflect.Field;import java.util.ArrayList;import java.util.List;public class BeanUtil { /** * @param args */ public static void main(String[] args) { System.out.println(getBeanFilesList("com.pdt.bean.Dictionary")); System.out.println(genCreateTableSql("com.pdt.bean.Dictionary")); System.out.println(genInsertSql("com.pdt.bean.Dictionary")); } public static String getBeanName(String bean){ try { Class clz = Class.forName(bean); String clzStr = clz.toString(); //得到类名 String beanName = clzStr.substring(clzStr.lastIndexOf(".")+1).toLowerCase(); return beanName; } catch (ClassNotFoundException e) { e.printStackTrace(); return ""; } } public static List<String> getBeanPropertyList(String bean){ try { Class clz = Class.forName(bean); Field[] strs = clz.getDeclaredFields(); List<String> propertyList = new ArrayList<String>(); for (int i = 0; i < strs.length; i++) { String protype = strs[i].getType().toString(); propertyList.add(protype.substring(protype.lastIndexOf(".")+1)+"`"+strs[i].getName()); } return propertyList; } catch (ClassNotFoundException e) { e.printStackTrace(); return null; } } public static String getBeanFilesList(String bean){ try { Class clz = Class.forName(bean); Field[] strs = clz.getDeclaredFields(); StringBuffer sb = new StringBuffer(); for (int i = 0; i < strs.length; i++) { String protype = strs[i].getType().toString(); if (!strs[i].getName().equals("tableName")&&!strs[i].getType().equals("List")) { sb.append(strs[i].getName()+","); } } sb.deleteCharAt(sb.toString().lastIndexOf(",")); return sb.toString(); } catch (ClassNotFoundException e) { e.printStackTrace(); return null; } } /** * 生成建表語句 * @param bean * @return */ public static String genCreateTableSql(String bean){ List<String> beanPropertyList = getBeanPropertyList(bean); StringBuffer sb = new StringBuffer("create table wnk_pdt_"+getBeanName(bean)+"(\n"); for (String string : beanPropertyList) { String[] propertys = string.split("`"); if (!propertys[1].equals("tableName")&&!propertys[1].equals("param")&&!propertys[0].equals("List")) { if (propertys[1].equals("id")) { sb.append(" id bigint primary key auto_increment,\n"); } else { if (propertys[0].equals("int")) { sb.append(" " + propertys[1] + " int default 0 comment '',\n"); } else if (propertys[0].equals("String")) { sb.append(" " + propertys[1] + " varchar(2000) default '' comment '',\n"); } else if (propertys[0].equals("double")) { sb.append(" " + propertys[1] + " double(10,2) default 0.0 comment '',\n"); } else if (propertys[0].equals("Date")) { sb.append(" " + propertys[1] + " datetime comment '',\n"); } } } } sb.append(")"); sb.deleteCharAt(sb.lastIndexOf(",")); return sb.toString(); } /** * 生成查询语句 * @param bean * @return */ public static String genSelectAllSql(String bean){ String filesList = getBeanFilesList(bean); return "select \n "+filesList+" \n from \n wnk_pdt_"+getBeanName(bean)+""; } /** * 生成插入语句 * @param bean * @return */ public static String genInsertSql(String bean){ String filesList = getBeanFilesList(bean); int fl = DataUtil.getCountSonStr(filesList,",")+1; String wenhao = ""; for (int i = 0; i < fl; i++) { if(i==fl-1){ wenhao = wenhao+"?"; }else{ wenhao = wenhao+"?,"; } } return "insert into wnk_pdt_"+getBeanName(bean)+"("+filesList+") values("+wenhao+")"; }}?
?