mybatis mapper.xml转建表语句

从网上下载了代码，但是发现没有DDL建表语句，只能自己手动创建了，感觉太麻烦，就写了一个工具类

将所有的mapper.xml放入到一个文件夹中，程序会自动读取生成建表语句

依赖的jar

<dependency><groupId>org.dom4j</groupId><artifactId>dom4j</artifactId><version>2.1.4</version>
</dependency>
<dependency><groupId>jaxen</groupId><artifactId>jaxen</artifactId><version>2.0.0</version>
</dependency>
<dependency><groupId>org.jdom</groupId><artifactId>jdom</artifactId><version>1.1.3</version>
</dependency>

package com.example.demo;import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.StringReader;
import java.util.List;import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.xpath.XPath;
import org.springframework.util.StringUtils;
import org.xml.sax.InputSource;public class Sqlmap2Table {// 默认所有的varchar都是512，可以保证满足绝大多数的字段private static final String DEFAULT_VARCHAR_LENGTH = "VARCHAR(256)";public static void main(String[] args) throws Exception {String sqlMapPath = "C:\\Users\\Administrator\\Downloads\\estate-public-master\\src\\main\\java\\com\\wy\\mapping";//这里指定你的sqlmap配置文件所在路径analysis(sqlMapPath);}/* 根据指定的目录进行遍历分析** @param path* @throws IOException* @throws JDOMException*/private static void analysis(String path) throws IOException, JDOMException {File filePath = new File(path);if (filePath.isDirectory() && !filePath.getName().equals(".svn")) {File[] fileList = filePath.listFiles();for (File file : fileList) {if (file.isDirectory()) {analysis(file.getAbsolutePath());} else {analysisSqlMap(file.getAbsolutePath());}}}}/*** 分析单个的sqlmap配置文件*  当然xml文件中必须设置字段类型的属性，否则无法判断字段属性* @param sqlMapFile* @throws IOException* @throws JDOMException*/@SuppressWarnings("unchecked")private static void analysisSqlMap(String sqlMapFile) throws IOException, JDOMException {// System.out.println("************"+sqlMapFile);boolean isNull=false;/*** 这里要把sqlmap文件中的这一行去掉：<br>* <!DOCTYPE sqlMap PUBLIC "-//iBATIS.com//DTD SQL Map 2.0//EN" "http://www.ibatis.com/dtd/sql-map-2.dtd"><br>* 否则JDom根据文件创建Document对象时，会报找不到www.ibatis.com这个异常，导致渲染不成功。*/String xmlString = filterRead(sqlMapFile, "<!DOCTYPE");
//       XmlDocument doc = new XmlDocument();Document doc = getDocument(xmlString);String tableName = getTableNameByInsert(doc);List<Element> resultMap = (List<Element>) XPath.selectNodes(doc, "//resultMap");for (Element e : resultMap) {if (org.apache.commons.lang3.StringUtils.isBlank(tableName)){String alias = e.getAttributeValue("type");tableName = getTableName(doc, alias);}List<Element> children = e.getChildren();StringBuilder createTableString = new StringBuilder("create table `" + tableName + "` (\n\t");int size = 0;boolean isId = false;for (Element child : children) {String jdbcType = child.getAttributeValue("jdbcType");  //获取属性类型if(StringUtils.isEmpty(jdbcType)){isNull=true;break;}if (jdbcType.toUpperCase().equals("VARCHAR")) {jdbcType = DEFAULT_VARCHAR_LENGTH;}else if (jdbcType.toUpperCase().equals("CHAR")) {jdbcType = "char(10)";}else if (jdbcType.toUpperCase().equals("BIGINT")) {jdbcType = "bigint(20)";}if (jdbcType.toUpperCase().equals("INTEGER")) {jdbcType = "int(11)";}else if (jdbcType.toUpperCase().equals("DECIMAL")) {jdbcType = "decimal(10,2)";}else if (jdbcType.toUpperCase().equals("NUMERIC")) {jdbcType = "decimal(10,2)";}if (jdbcType.toUpperCase().equals("DOUBLE")) {jdbcType = "double";}if (jdbcType.toUpperCase().equals("REAL")) {jdbcType = "double";}if (jdbcType.toUpperCase().equals("BOOLEAN")) {jdbcType = "tinyint(1)";}if (jdbcType.toUpperCase().equals("FLOAT")) {jdbcType = "float";}String columnName = child.getAttributeValue("column");createTableString.append("`").append(columnName).append("` ").append(jdbcType);  //加入属性和类型if ("ID".equalsIgnoreCase(columnName)){createTableString.append(" NOT NULL AUTO_INCREMENT");isId = true;}else{createTableString.append(" DEFAULT NULL");}if (size < children.size() - 1) {createTableString.append(",\n\t");}size++;}if(isNull){break;}if (isId){createTableString.append(",\n\tPRIMARY KEY (`id`) \n");}else{createTableString.append("\n");}createTableString.append(") ENGINE=InnoDB DEFAULT CHARSET=utf8;");System.out.println(createTableString.toString().toLowerCase());}}private static String getTableNameByInsert(Document doc) throws JDOMException {List<Element> resultMap = (List<Element>) XPath.selectNodes(doc, "//insert");for (Element ele : resultMap){String text = ele.getText();//System.out.println(ele.getText());int intoIndex = text.indexOf("into");if (intoIndex > 0){String s = text.substring(intoIndex+4);intoIndex = s.indexOf("(");if (intoIndex > 0){s = s.substring(0,intoIndex);return s.trim().toLowerCase();}}}return null;}private static String getTableName(Document doc, String alias) throws JDOMException {String tableName = "";String classPath = null;// 这里的alias可能是一个别名，也可能是一个java类路径，这里我通过该alias是否有点"."这个符号来区别if (!alias.contains(".")) {// 是JAVA类// 是别名，就到配置的别名中去找Element aliasElement = (Element) XPath.selectSingleNode(doc, "//typeAlias[@alias=\"" + alias + "\"]");alias = aliasElement.getAttributeValue("type");}int lastIndex = alias.lastIndexOf(".");if (lastIndex > 0) {// 是JAVA类classPath = alias.substring(lastIndex+1);}else{classPath = alias;}// int i = classPath.lastIndexOf("DO");// 取到根据表名生成的DO名称，无“DO”两个字符//classPath = classPath.substring(0, i);char[] chars = classPath.toCharArray();boolean isFirst = Boolean.TRUE;// 生成真实的表名for (char c : chars) {if (!isFirst && c >= 65 && c <= 90) {tableName += "_";}if (isFirst) {isFirst = Boolean.FALSE;}tableName += c;}// 表名转换为大写返回return tableName.toUpperCase();}/*** 过滤性阅读** @param filePath 文件路径* @param notIncludeLineStartWith 不包括的字符，即某行的开头是这样的字符串，则在读取的时候该行忽略* @return* @throws IOException*/private static String filterRead(String filePath, String notIncludeLineStartWith) throws IOException {String result = "";FileReader fr = new FileReader(filePath);BufferedReader br = new BufferedReader(fr);String line = br.readLine();while (line != null) {if (!line.startsWith(notIncludeLineStartWith)) {result += line;}line = br.readLine();if (line != null && !line.startsWith(notIncludeLineStartWith)) {result += "\n";}}br.close();fr.close();return result;}/*** 根据XML字符串 建立JDom的Document对象** @param xmlString XML格式的字符串* @return Document 返回建立的JDom的Document对象，建立不成功将抛出异常。* @throws IOException* @throws JDOMException*/private static Document getDocument(String xmlString) throws JDOMException, IOException {
//       SAXBuilder builder = new SAXBuilder();
//       Document anotherDocument =  builder.build( new StringReader(xmlString));//       try {
//        Document doc = (Document)DocumentHelper.parseText(xmlString);
//         return doc;
//
//       } catch (DocumentException e) {
//        e.printStackTrace();
//    }StringReader st = new StringReader(xmlString);InputSource is = new InputSource(st);Document doc = (new SAXBuilder()).build(is);return doc;}}