example/src/main/java/com/fr/demo/NewReadFrmFromDatabase.java

package com.fr.demo;

import com.fr.data.core.db.DBUtils;
import com.fr.form.main.Form;
import com.fr.log.FineLoggerFactory;
import com.fr.web.session.SessionLocalManager;
import com.fr.web.weblet.DBFormlet;

import javax.servlet.http.HttpServletRequest;
import java.io.InputStream;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Map;



public class NewReadFrmFromDatabase extends DBFormlet {

    @Override
    public Form createForm(HttpServletRequest reportletRequest) {
        String name = reportletRequest.getParameter("reportname");
        return createForm(name);
    }

    @Override
    public Form createForm(String reportName) {
        Form form = null;
        Connection connection = null;
        try {
            connection = getConnection();
            // 从数据库中读模板
            String sql = "select frm from report where frmname = '" + reportName
                    + "'";
            Statement smt = connection.createStatement();
            ResultSet rs = smt.executeQuery(sql);
            while (rs.next()) {
                Blob blob = rs.getBlob(1);
                FineLoggerFactory.getLogger().info(blob.toString());
                InputStream ins = blob.getBinaryStream();
                form.readStream(ins);
                return form;
            }
        } catch (Exception e) {
            throw SessionLocalManager.createLogPackedException(e);
        }finally {
            DBUtils.closeConnection(connection);
        }

        return form;
    }

    private static Connection getConnection() throws ClassNotFoundException, SQLException {
        // 定义数据连接(根据你实际数据库信息进行修改)
        String driver = "com.mysql.jdbc.Driver";
        String url = "jdbc:mysql://localhost:3306/test";
        String user = "root";
        String pass = "123456";
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, user, pass);
        return conn;
    }

    @Override
    public void setParameterMap(Map<String, Object> arg0) {
        // TODO Auto-generated method stub

    }
}