创建model工具类

/**
 * 
 */
package com.abel.util;


import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;


import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;


/**
 * @project lucene
 * @description 
 * @author abel.li
 * @creation 2015-1-30
 * @email [e-mail]
 * @version  
 */
public class CreateModel {

private String TABLENAME = "table";
private String DATABASE = "db";


public static void main(String[] args) {
List<Model> list = new CreateModel().excute();
for(Model model : list){
System.out.println("\tprivate "+ model.getColumnType() + " " + model.getColumnName() + ";\t\t\t//" + model.getColumnComment());
}
}
 
    public Connection getConnection() {
    String url = "";
    String user = "";
    String pwd = "";
   
        Connection conn = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
//            Class.forName("oracle.jdbc.driver.OracleDriver");
//            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
//            Class.forName("COM.ibm.db2.jdbc.app.DB2Driver");//有DB2客户端的Provider实例
//            Class.forName("COM.ibm.db2.jdbc.net.DB2Driver");//无DB2客户端的Provider实例
            conn = (Connection) DriverManager.getConnection(url, user, pwd);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return conn;
    }
    
    public List<Model> excute(){
        Connection conn = getConnection(); // 得到数据库连接
        //myDB为数据库名
        String strsql = "SELECT COLUMN_NAME 'colName', DATA_TYPE 'fieldType', COLUMN_COMMENT 'colComment' " +
        "FROM INFORMATION_SCHEMA.COLUMNS " +
        "WHERE table_name = '" + TABLENAME + "' " +
        "AND table_schema = '" + DATABASE + "';";
        PreparedStatement ps = null;
        ResultSet rs = null;
        List<Model> list = new ArrayList<Model>();
        try {
ps = (PreparedStatement) conn.prepareStatement(strsql);
// CallableStatement cs = conn.prepareCall("{CALL demoSp(? , ?)}") ;   
rs = ps.executeQuery();

while (rs.next()) {
Model model = new Model();
model.setColumnName(rs.getString("colName"));
model.setColumnType(sqlType2JavaType(rs.getString("fieldType")));
model.setColumnComment(rs.getString("colComment"));
list.add(model);
}
rs.close();
ps.closeOnCompletion();
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
if(ps != null){
ps.close();
}
if(rs != null){
rs.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return list;
    }
    
    private String sqlType2JavaType(String sqlType) {
        if (sqlType.equalsIgnoreCase("bit")) {
            return "boolean";
        } else if (sqlType.equalsIgnoreCase("tinyint")) {
            return "byte";
        } else if (sqlType.equalsIgnoreCase("smallint")) {
            return "short";
        } else if (sqlType.equalsIgnoreCase("int")) {
            return "int";
        } else if (sqlType.equalsIgnoreCase("bigint")) {
            return "long";
        } else if (sqlType.equalsIgnoreCase("float")) {
            return "float";
        } else if (sqlType.equalsIgnoreCase("decimal")
                || sqlType.equalsIgnoreCase("numeric")
                || sqlType.equalsIgnoreCase("real")
                || sqlType.equalsIgnoreCase("double")) {
            return "double";
        } else if (sqlType.equalsIgnoreCase("money")
                || sqlType.equalsIgnoreCase("smallmoney")) {
            return "double";
        } else if (sqlType.equalsIgnoreCase("varchar")
                || sqlType.equalsIgnoreCase("char")
                || sqlType.equalsIgnoreCase("nvarchar")
                || sqlType.equalsIgnoreCase("nchar")) {
            return "String";
        } else if (sqlType.equalsIgnoreCase("datetime")
        ||sqlType.equalsIgnoreCase("timestamp")) {
            return "Date";
        } else if (sqlType.equalsIgnoreCase("time")) {
            return "Time";
        }
 
        else if (sqlType.equalsIgnoreCase("image")) {
            return "Blob";
        } else if (sqlType.equalsIgnoreCase("text")) {
            return "Clob";
        }
        return null;
    }
}
class Model{
private String columnName;
private String columnType;
private String columnComment;

public String getColumnName() {
return columnName;
}
public void setColumnName(String columnName) {
this.columnName = columnName;
}
public String getColumnType() {
return columnType;
}
public void setColumnType(String columnType) {
this.columnType = columnType;
}
public String getColumnComment() {
return columnComment;
}
public void setColumnComment(String columnComment) {
this.columnComment = columnComment;
}
}