java通过jdbc操作Excel
ExcelAccess.java
package test; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.List; public class ExcelAccess { public static void main(String[] args) { List<DataTableColumns> ls = new ArrayList<DataTableColumns>(); String dateForm ="yyyyMMddHHmmss"; //时间格式。mm指分钟 String now = new SimpleDateFormat(dateForm).format(new java.util.Date()); System.out.println(now); String dataTableName = "user_detail2"; int data_id=1; int ret=0; //连接oracle String url = "jdbc:oracle:" + "thin:@***:1521:edu"; String user = "***"; String password = "***"; DbOracle dbo= new DbOracle(); dbo.conDbOracle(url,user,password); //获取表声明 dbo.getTableColumns(data_id,ls); //建Excel sheet String tableName = "test"; String sql=dbo.getTableInfo(tableName,ls); System.out.println(sql); //Excel操作 DbExcel dbExl = new DbExcel(); if (!dbExl.openConnection()) { System.err.println("open connection err."); System.exit(1); } //ret = dbExl.createTableInfo(sql,tableName); if (ret == 1) { System.out.println("建表"+tableName+" success."); } String query = ""; String colName = ""; String colNames = ""; for(int i = 0; i < ls.size(); i++) { colName +=ls.get(i).getValue_name()+","; } query = query+colName; colNames = query.substring(0,query.length()-1); query = "select "+colNames +" from "+dataTableName+" where rownum<60000"; System.out.println("查询语句"+query+" success."); //query = "select web_id,省 from user_detail"; String insertSql =""; colName=""; ret = 1; try { dbo.st = dbo.con.createStatement(); dbo.rs = dbo.st.executeQuery(query.toString()); while (dbo.rs.next() && ret==1) { insertSql = "INSERT INTO ["+tableName+"$]("+colNames+") VALUES("; for(int i = 0; i < ls.size(); i++) { colName =ls.get(i).getValue_name(); insertSql += "‘"+dbo.rs.getString(colName)+"‘,"; } insertSql = insertSql.substring(0,insertSql.length()-1); insertSql += " )"; ret = dbExl.insertExcel(insertSql); } } catch (Exception e) { e.printStackTrace(); } dbExl.closeConnection(); dbo.closeDbOracle(); now = new SimpleDateFormat(dateForm).format(new java.util.Date()); System.out.println(now); // close the connection } }
DbOracle.java
package test; import java.sql.*; import java.util.ArrayList; import java.util.List; public class DbOracle { public Connection con = null; public Statement st = null; public ResultSet rs = null; public void conDbOracle(String url,String user,String password){ try { Class.forName("oracle.jdbc.driver.OracleDriver");// 加载Oracle驱动程序 System.out.println("开始尝试连接数据库!"); con = DriverManager.getConnection(url, user, password);// 获取连接 System.out.println("连接成功!"); } catch (Exception e) { e.printStackTrace(); } } public void getTableColumns(int dataId,List<DataTableColumns> ls){ StringBuffer sb = new StringBuffer(); sb.append(" select column_id,column_name,value_name,value_length,value_type,order_no "); sb.append(" from data_table_columns_instance "); sb.append(" where data_id = "+dataId); sb.append(" order by order_no "); System.out.println(sb); try { st = con.createStatement(); rs = st.executeQuery(sb.toString()); while (rs.next()) { DataTableColumns dataColumns = new DataTableColumns(); dataColumns.setColumn_id(rs.getInt("column_id")); dataColumns.setColumn_name(rs.getString("column_name")); dataColumns.setValue_name(rs.getString("value_name")); dataColumns.setValue_length(rs.getInt("value_length")); dataColumns.setValue_type(rs.getInt("value_type")); dataColumns.setOrder_no(rs.getInt("order_no")); ls.add(dataColumns); } } catch (Exception e) { e.printStackTrace(); } } public String getTableInfo(String table_name,List<DataTableColumns> ls){ String sql = ""; String valueNames = ""; for(int i = 0; i < ls.size(); i++) { valueNames +=ls.get(i).getValue_name(); valueNames =valueNames+" TEXT,"; } sql="create table "+table_name+"("+valueNames.substring(0,valueNames.length()-1)+")"; return sql; } public void closeDbOracle(){ try { if (con != null) con.close(); System.out.println("数据库连接已关闭!"); } catch (Exception e) { e.printStackTrace(); } } }
DbExcel.java
package test; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.Statement; public class DbExcel { /** db connection */ private Connection c; /** db statement */ private Statement stmnt; /** JDBC driver name */ private String driver ="sun.jdbc.odbc.JdbcOdbcDriver"; /** url of the db */ private String url ="jdbc:odbc:DbExcel;ReadOnly=False;"; /** username to access the db */ private String username= ""; /** password for the username */ private String password= ""; /** * open the connection * @return true if opened, false otherwise */ public boolean openConnection() { try { Class.forName(driver); c = DriverManager.getConnection(url, username, password); stmnt = c.createStatement(); } catch (Exception e) { e.printStackTrace(); return false; } return true; } public int createTableInfo(String query,String tableName) { int result = -1; if (stmnt == null) return result; try { //建表,这里drop table 竟然是只drop表头 //result = stmnt.executeUpdate("DROP TABLE "+tableName); c.commit(); result = stmnt.executeUpdate(query); } catch (SQLException e) { e.printStackTrace(); } return result; } public int insertExcel(String query) { int result = -1; try { result = stmnt.executeUpdate(query); } catch (SQLException e) { e.printStackTrace(); closeConnection(); } return result; } /** * close the connection */ public boolean closeConnection() { try { if (stmnt != null) stmnt.close(); if (c != null) c.close(); } catch (Exception e) { System.err.println(e); return false; } return true; } }
DataTableColumns.java
package test; public class DataTableColumns { private int data_id = 0; private int column_id = 0; private String column_name = null; private String value_name = null; private int value_length = 3; private int value_type = 1; private int order_no = 0; /** * @param data_id the data_id to set */ public void setData_id(int data_id) { this.data_id = data_id; } /** * @return the data_id */ public int getData_id() { return data_id; } public void setValue_length(int value_length) { this.value_length = value_length; } public int getValue_length() { return value_length; } public void setValue_name(String value_name) { this.value_name = value_name; } public String getValue_name() { return value_name; } public void setColumn_name(String column_name) { this.column_name = column_name; } public String getColumn_name() { return column_name; } public void setValue_type(int value_type) { this.value_type = value_type; } public int getValue_type() { return value_type; } public void setOrder_no(int order_no) { this.order_no = order_no; } public int getOrder_no() { return order_no; } public void setColumn_id(int column_id) { this.column_id = column_id; } public int getColumn_id() { return column_id; } }
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