package com.company.project;
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.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
import org.jdom2.xpath.XPath;
import org.springframework.util.StringUtils;
/**
* 根据Ibatis的SqlMap配置文件，重新生成表结构。<br>
* 要求所有的sqlmap中对应的字段都有jdbcType这个属性。
*/
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 = "D:\\mapper\\1" ;//这里指定你的sqlmap配置文件所在路径
//sqlMapPath= "D:\\mapper\\1";
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
*
* @param sqlMapFile
* @throws IOException
* @throws JDOMException
*/
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");
Document doc = getDocument(xmlString);
List<Element> resultMap = (List<Element>) XPath.selectNodes(doc, "//resultMap");
for (Element e : resultMap) {
String alias = e.getAttributeValue("type");
String tableName = getTableName(doc, alias);
List<Element> children = e.getChildren();
StringBuilder createTableString = new StringBuilder("create table " + tableName + "(\n\t");
int size = 0;
for (Element child : children) {
String jdbcType = child.getAttributeValue("jdbcType");
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" ;
}
createTableString.append(child.getAttributeValue("column")).append(" ").append(jdbcType);
if (size < children.size() - 1) {
createTableString.append(",\n\t");
} else {
createTableString.append("\n");
}
size++;
}
if (isNull) {
break;
}
createTableString.append(");");
System.out.println(createTableString.toString().toUpperCase());
}
}
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.indexOf(".") > 0) {// 是JAVA类
classPath = alias;
} else {// 是别名，就到配置的别名中去找
Element aliasElement = (Element) XPath.selectSingleNode(doc, "//typeAlias[@alias=\"" + alias + "\"]");
classPath = aliasElement.getAttributeValue("type");
}
String[] classPathArray = classPath.split("\\.");
// 取到DO的名称
classPath = classPathArray[classPathArray.length - 1];
// 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));
return anotherDocument;
}
}
