帆软帮助文档代码合集。
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

97 lines
3.0 KiB

package com.fr.data;
import com.fr.log.FineLoggerFactory;
import com.fr.stable.ParameterProvider;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
/**
* 带参数的程序数据集Demo 跟ParamTableDataDemo功能一样但实现更简单
*
* @author fanruan
*/
public class SimpleParamTableDataDemo extends SimpleTableData {
@Override
public String[] initColumnNames() {
String[] columnNames = new String[10];
for (int i = 0; i < 10; i++) {
columnNames[i] = "column#" + i;
}
return columnNames;
}
@Override
public List<Object[]> loadData() {
// 保存得到的数据库表名
String tableName = ((ParameterProvider) (parameters.get().toArray())[0]).getValue().toString();
// 构造SQL语句,并打印出来
String sql = "select * from " + tableName;
FineLoggerFactory.getLogger().info("Query SQL of ParamTableDataDemo: \n" + sql);
// 保存得到的结果集
ArrayList<Object[]> valueList = new ArrayList();
Connection con = null;
try {
con = getConnection();
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(sql);
// 获得记录的详细信息,然后获得总列数
ResultSetMetaData rsmd = rs.getMetaData();
int colNum = rsmd.getColumnCount();
// 用对象保存数据
Object[] objArray = null;
while (rs.next()) {
objArray = new Object[colNum];
for (int i = 0; i < colNum; i++) {
objArray[i] = rs.getObject(i + 1);
}
// 在valueList中加入这一行数据
valueList.add(objArray);
}
// 释放数据库资源
rs.close();
stmt.close();
} catch (Exception e) {
FineLoggerFactory.getLogger().error(e.getMessage(), e);
} finally {
try {
if (con != null) {
con.close();
}
} catch (SQLException e) {
FineLoggerFactory.getLogger().error(e.getMessage(), e);
}
}
return valueList;
}
/**
* 获取数据库连接 driverName和 url 可以换成您需要的
*
* @return Connection
*/
private Connection getConnection() {
String driverName = "org.sqlite.JDBC";
String url = "jdbc:sqlite:////Applications//FineReport10_325//webapps//webroot//help//FRDemo.db";
String username = "";
String password = "";
Connection con;
try {
Class.forName(driverName);
con = DriverManager.getConnection(url, username, password);
} catch (Exception e) {
e.printStackTrace();
return null;
}
return con;
}
}