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锁定老帖子 主题：简易Etmvc-Ar自动生成工具
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发表时间：2009-11-14
忙里偷闲挪出了点时间看看能不能弄个Etmvc自动生成代码工具,首先最烦的是AR部分,表也多,字段也多,码起来完全靠体力. 首先是要遍历数据库中的表咯,当然要连接数据库,我们就不必再创造数据库连接了,Etmvc-AR中已经有咯哦, 仔细看看代码可以用上 ConnectionHolder 这个类,在初始化时随便给个类就行了.例如
ConnectionHolder connectionHolder = new ConnectionHolder(ApplicationsController.class); 可以这样
Connection conn = connectionHolder.getConnection(); 得到数据库连接对象,至此获取数据库表列表代码如下
public JspView index() throws DataAccessException, SQLException{
JspView view = new JspView();
ConnectionHolder connectionHolder = new ConnectionHolder(MyUser.class);
Connection conn = connectionHolder.getConnection();
DatabaseMetaData dbmd = conn.getMetaData();
String[] types = { "TABLE" };
ResultSet resultSet = dbmd.getTables(null, null, "%", types);
view.setAttribute("tablelist", resultSet);
return view;
}
视图文件如下
<%@ page
import="java.sql.ResultSet"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<form action="CreateAR" method="post" name="form1" >
<table>
<tr>
<td>数据表</td>
<td>
<select id="tableName" name="tableName">
<%
ResultSet resultSet = (ResultSet)request.getAttribute("tablelist") ;
while (resultSet.next()) {
String tableName = resultSet.getString(3);
%>
<option value="<%=tableName %>"><%=tableName%></option>
<%}%>
</select>
</td>
<td> <input type="submit" value="确定" > </td>
</tr>
</table>
</form>
</body>
</html>
接下来就是要遍历指定表的字段了,并生成相应的模板 遍历字段的方法
public JspView CreateAR() throws SQLException, DataAccessException{
String table = request.getParameter("tableName");
String sql = "select * from "+ table;
ResultSetMetaData rsmd = null;
ConnectionHolder connectionHolder = new ConnectionHolder(ApplicationsController.class);
try{
Connection conn = connectionHolder.getConnection();
Statement stmt=conn.createStatement();
ResultSet rs=stmt.executeQuery(sql);
rsmd = rs.getMetaData();
}
finally{
connectionHolder.close();
}
JspView view = new JspView();
view.setAttribute("tables", table);
view.setAttribute("tableinfo", rsmd);
return view;
}
用jsp来作为模板,根据自身要求修改下.(还需要调整的)
<%@ page import="java.sql.ResultSetMetaData" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
ResultSetMetaData rsmd = (ResultSetMetaData)request.getAttribute("tableinfo") ;
String table = (String)request.getParameter("tableName") ;
%>
<pre>
/* ***********************************************
* author : Anyhome
* email : ayhome@gmail.com
* function:
* @date 2009-10-30
* history: created by Anyhome
* ***********************************************/
package org.anyhome.models;
import com.et.ar.ActiveRecordBase;
import com.et.ar.annotations.Column;
import com.et.ar.annotations.Id;
import com.et.ar.annotations.Table;
@Table(name="<%=table%>")
public class <%=table%> extends ActiveRecordBase {
<%
for(int i=1;i<=rsmd.getColumnCount();i++)
{
String s = rsmd.getColumnTypeName(i);
String sid = "Column";
if (s.trim().equalsIgnoreCase("int"))
s = "Integer";
else if(s.trim().equalsIgnoreCase("int identity"))
{
s = "Integer";
sid = "Id";
}
else
s = "String";
String outs = "@"+sid+" private " + s + " "
+rsmd.getColumnName(i);
%>
<%=outs %>
<%
}
%>
<%
for(int i=1;i<=rsmd.getColumnCount();i++)
{
String s = rsmd.getColumnTypeName(i);
String sid = "Column";
if (s.trim().equalsIgnoreCase("int"))
s = "Integer";
else if(s.trim().equalsIgnoreCase("int identity"))
{
s = "Integer";
sid = "Id";
}
else
s = "String";
%>
public void set<%=rsmd.getColumnName(i)%>(<%=s %> <%=rsmd.getColumnName(i).replaceFirst(String.valueOf(rsmd.getColumnName(i).charAt(0)), String.valueOf(rsmd.getColumnName(i).charAt(0)).toLowerCase()) %>) {
<%=rsmd.getColumnName(i)%> = <%=rsmd.getColumnName(i).replaceFirst(String.valueOf(rsmd.getColumnName(i).charAt(0)), String.valueOf(rsmd.getColumnName(i).charAt(0)).toLowerCase()) %>;
}
public <%=s %> get<%=rsmd.getColumnName(i)%>() {
return <%=rsmd.getColumnName(i)%>;
}
<%
}
%>
}
</pre>
</body>
</html>
呵呵 很简单的吧 不过目前我只应用于我的项目,所以只知道mssql是通过了
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