标签:case als display lease asn 字符 success iter resultset
读入文件的字符串,以1-n个空格作为分隔拆分读入,全部转换为大写/小写字母(做到不区分大小写)后进行统计。若库里有该词则计数加一,否则添加字段。
package servlet; import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.FileReader; import java.util.Scanner; import dao.PROCE; public class test { public static void main(String[] args) throws FileNotFoundException { int N; Scanner scanner = new Scanner(new BufferedReader(new FileReader("E://HPSS.txt"))); Scanner ipt = new Scanner(System.in); scanner.useDelimiter("[^A-Za-z‘]"); while (scanner.hasNext()) { PROCE.process(scanner.next()); } System.err.println("Process Done.Please Enter the Amount You want to Display:"); N = ipt.nextInt(); PROCE.showResult(N); } }
package dat; public class wordPro { private long time; private String word; public wordPro() { } public wordPro(String ipt, long lipt) { time = lipt; word = ipt; } public void setWord(String ipt) { word = ipt; } public String getWord() { return word; } public void setTime(long ipt) { time = ipt; } public long getTime() { return time; } }
package dao; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import dbu.DBUtil; public class PROCE { public static int showResult() { int flag = 0; String sql = "select * from word_log order by time desc"; Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs = null; try { state = conn.createStatement(); rs = state.executeQuery(sql); while (rs.next()) { System.out.println("Word:" + rs.getString("word") + " Time:" + rs.getInt("time")); flag = flag + 1; } } catch (Exception e) { e.printStackTrace(); } finally { DBUtil.close(rs, state, conn); } return flag; } public static int showResult(int n) { int flag = n; String sql = "select * from word_log order by time desc"; Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs = null; try { state = conn.createStatement(); rs = state.executeQuery(sql); while (rs.next()) { System.out.println("Word:" + rs.getString("word") + " Time:" + rs.getInt("time")); flag = flag - 1; if (flag == 0) { return 0; } } } catch (Exception e) { e.printStackTrace(); } finally { DBUtil.close(rs, state, conn); } return flag; } public static void process(String ipt) { boolean flag = true; long i = 0; ipt = ipt.toLowerCase(); ipt = ipt.replace("‘", "" + "\\‘"); if (ipt.equals("")) { return; } i = haveWord(ipt); if (i == 0) { flag = addWord(ipt); if (!flag) { System.err.println("Add Word Error!"); flag = true; } } else { flag = plusWord(ipt, i); if (!flag) { System.err.println("Plus Word Error!"); } } System.out.println("Successful Processed Word:" + ipt); } public static long haveWord(String ipt) { long flag = 0; String sql = "select * from word_log where word =‘" + ipt + "‘"; Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs = null; try { state = conn.createStatement(); rs = state.executeQuery(sql); if (rs.next()) { flag = rs.getInt("time"); } } catch (Exception e) { e.printStackTrace(); } finally { DBUtil.close(rs, state, conn); } return flag; } public static boolean addWord(String ipt) { String sql = "insert into word_log(word,time) values(‘" + ipt + "‘,1)"; Connection conn = DBUtil.getConn(); Statement state = null; boolean f = false; int a = 0; try { state = conn.createStatement(); a = state.executeUpdate(sql); } catch (Exception e) { e.printStackTrace(); } finally { DBUtil.close(state, conn); } if (a > 0) { f = true; } return f; } public static boolean plusWord(String ipt, long time) { time = time + 1; String sql = "update word_log set time = " + time + " where word=‘" + ipt + "‘"; Connection conn = DBUtil.getConn(); Statement state = null; boolean f = false; int a = 0; try { state = conn.createStatement(); a = state.executeUpdate(sql); } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(state, conn); } if (a > 0) { f = true; } return f; } }
当时第一次尝试非Web项目的数据库读写。用数据库存储统计数据的缺点是读写比较慢,统计一次要很长时间。
标签:case als display lease asn 字符 success iter resultset
原文地址:https://www.cnblogs.com/minadukirinno/p/13337278.html