/*
* Created on 2004-10-15
*
* Title: QuickCoder
* Description: 一段简单的根据SQLServer数据库表结构生成C#实体类的Java代码
曾经在学校听殷兆粼教授这样讲过,UML将来应该能够根据已经设计好的业务逻辑,自动生成数据库表和数据间的关联等,并生成实体代码,最好能够再生成部分业务逻辑代码。这样我们的设计就跟画画一样了,我们要做的就是画UML图。数据库结构、程序代码都自动生成。
这里是我在公司的一个项目中为了把数据库实体表生成C#实体而写的一段代码。功能不多,但是可以省敲很多代码。
* Company: http://www.hakatasoft.com
* Author: Shuqun, Zhou
*
*/
package coder;
import java.io.*;
import java.sql.*;
import java.util.*;
/**
* @author Administrator
*
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
*/
public class QuickCoder {
public static Map MSSQLServerDataTypeCSharpTypeMap = new HashMap();
static {
MSSQLServerDataTypeCSharpTypeMap.put("char", "string");
MSSQLServerDataTypeCSharpTypeMap.put("varchar", "string");
MSSQLServerDataTypeCSharpTypeMap.put("nvarchar", "string");
MSSQLServerDataTypeCSharpTypeMap.put("text", "string");
MSSQLServerDataTypeCSharpTypeMap.put("datetime", "System.DateTime");
MSSQLServerDataTypeCSharpTypeMap.put("int", "int");
MSSQLServerDataTypeCSharpTypeMap.put("int identity", "float");
MSSQLServerDataTypeCSharpTypeMap.put("float", "float");
MSSQLServerDataTypeCSharpTypeMap.put("bit", "string");
MSSQLServerDataTypeCSharpTypeMap.put("numeric", "double");
MSSQLServerDataTypeCSharpTypeMap.put("money", "double");
}
public static void prt(Object o) {
System.out.println(o);
}
public static void prt(int i) {
System.out.println(i);
}
public static void table2CSharp(ResultSetMetaData rsmd, String namespace, String className) throws IOException, SQLException {
StringBuffer cs = new StringBuffer();
String line = System.getProperty("line.separator");
cs.append("using System;").append(line).append(line);
cs.append("/**").append(line);
cs.append(" * Generate by QuickCoder.").append(line);
cs.append(" * 使用前请修改文件名和类名(去掉`Auto_'前缀)").append(line);
cs.append(" */").append(line).append(line);
cs.append("namespace ").append(namespace).append(" {").append(line);
cs.append("\tpublic class ").append(className).append(" {").append(line);
int c = rsmd.getColumnCount();
String dbType, type, name;
Object t;
for (int i = 1; i <= c; i++) {
name = rsmd.getColumnLabel(i).replace(' ', '_');
dbType = rsmd.getColumnTypeName(i);
t = MSSQLServerDataTypeCSharpTypeMap.get(dbType);
if (t != null) {
type = t.toString();
}
else {
type = "____" + dbType;
prt(namespace + "" + className + " " + dbType);
}
cs.append("\t\t").append(type)
.append(" m_").append(name).append(";").append(line);
/* 由于同组一工程师说这种C#的getter, setter写法不好,我就改成下面那种写法了
不过我认为他是在用Java的思想审视C#,我找不到这样写的不好之处
cs.append("\t\tpublic ").append(type).append(" ").append(name).append(" ").append("{").append(line);
cs.append("\t\t\tget {").append(line);
cs.append("\t\t\t\treturn m_").append(name).append(";").append(line);
cs.append("\t\t\t}").append(line);
cs.append("\t\t\tset {").append(line);
cs.append("\t\t\t\tm_").append(name).append(" = ").append("value;").append(line);
cs.append("\t\t\t}").append(line);
cs.append("\t\t}").append(line);
*/
cs.append(line);
cs.append("\t\tpublic ").append(type).append(" Get").append(name).append("() {").append(line);
cs.append("\t\t\treturn this.m_").append(name).append(";").append(line);
cs.append("\t\t}").append(line);
cs.append(line);
cs.append("\t\tpublic void Set").append(name).append("(").append(type).append(" ").append(name).append(") {").append(line);
cs.append("\t\t\tthis.m_").append(name).append(" = ").append(name).append(";").append(line);
cs.append("\t\t}").append(line);
if ("int".equals(type) || "float".equals(type) || "double".equals(type)) {
cs.append(line);
cs.append("\t\tpublic string").append(" Get").append(name).append("AsString() {").append(line);
cs.append("\t\t\treturn this.m_").append(name).append(".ToString();").append(line);
cs.append("\t\t}").append(line);
cs.append(line);
cs.append("\t\tpublic void Set").append(name).append("(string s) {").append(line);
cs.append("\t\t\tthis.m_").append(name).append(" = ").append(type).append(".Parse(s);").append(line);
cs.append("\t\t}").append(line);
}
cs.append(line);
}
cs.append("\t}").append(line);
cs.append("}").append(line);
//prt(cs);
File file = new File("C:/tmp", className + ".cs");
FileOutputStream fos = new FileOutputStream(file);
fos.write(cs.toString().getBytes());
fos.close();
}
public static void main(String[] args) throws Exception {
prt("Start");
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection("jdbc:odbc:SCE", "SCE", "SCE");
Connection con2 = DriverManager.getConnection("jdbc:odbc:SCE", "SCE", "SCE");
Statement stmt = con2.createStatement();
DatabaseMetaData meta = con.getMetaData();
ResultSet rs = meta.getTables(null, null, null, null);
String tableName, tableType;
ResultSet rs2;
while (rs.next()) {
//rsmd;
//System.out.println(rsmd.getColumnCount());
tableName = rs.getString("TABLE_NAME");
tableType = rs.getString("TABLE_TYPE");
if ("TABLE".equals(tableType) && tableName.startsWith("tb_")) {
//prt(tableName);
rs2 = stmt.executeQuery("SELECT * FROM [" + tableName + "]");
table2CSharp(rs2.getMetaData(), "Sce.Action.Objects", "Auto_O_" + tableName.substring(3, tableName.length()).replace('-', '_'));
rs2.close();
}
}
rs.close();
stmt.close();
con.close();
con2.close();
prt("End");
}
}