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odbc.java --------------------------------------------- package bbs; /* database operation class, test by odbc This javabean is written by zergling It is my first javabean :o version 1.01 */ import java.sql.*; import java.lang.*; import java.io.*; import java.util.*; import sun.io.*; public class odbc { Connection sqlCon; ResultSet rstSql; Statement stmS; String strCon; String strSql; boolean status; long rowcount; int page; int pagesize; long pagecount; long firstrecord; //connect to the default database public boolean connect() { //Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); this.strCon = "jdbc:odbc:jspbbs"; //replace with your default database try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); this.sqlCon = java.sql.DriverManager.getConnection(this.strCon,"sa",""); //replace with your default database connection configure option this.status = true; return true; } catch(Exception e) { this.status = false; return false; } } //connect to the custom database public boolean connect(String conName,String username,String password) { //Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); this.strCon = conName; try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); this.sqlCon = java.sql.DriverManager.getConnection(this.strCon,username,password); this.status = true; return true; } catch(Exception e) { this.status = false; return false; } } //execute sql(insert,update,delete,...) public boolean execute(String s) { try { this.stmS = this.sqlCon.createStatement(); this.stmS.executeUpdate(s); this.status = true; return true; } catch(Exception e) { this.status = false; return false; } } //query the data from database public boolean query(String s) { try { this.rowcount = 0; this.stmS = this.sqlCon.createStatement(); this.rstSql = this.stmS.executeQuery(s); while (this.nextrecord()) { this.rowcount++; } this.rstSql = this.stmS.executeQuery(s); this.status = true; return true; } catch(Exception e) { this.status = false; return false; } } //return the row count public long getrowcount() { return this.rowcount; } //return the pagecount public long getpagecount() { return this.pagecount; } //return the resultset of data public String getstring(String s) { try { return this.rstSql.getString(s); } catch(Exception e) { return "not exists"; } } public int getint(String s) { try { return Integer.parseInt(this.rstSql.getString(s)); } catch(Exception e) { return 0; } } //resultset move forward public boolean nextrecord() { try { return this.rstSql.next(); } catch(Exception e) { return false; } } //set current page (recall first) public boolean setpage(int size,int no) { this.pagesize = size; this.page = no; this.pagecount = Math.round((this.rowcount - 1) / this.pagesize)+1; this.firstrecord = this.pagesize * ( this.page - 1 ); try { for(int i=0;i<this.firstrecord;i++) if (!this.nextrecord()) break; return true; } catch(Exception e) { return false; } } //get string from database and change it into chinese public String readChinese(String s) { try { String temp = new String(s.getBytes("GB2312"),"8859_1"); return temp; } catch(Exception e) { return s; } } //write string to the database\\\'s chinese transform public static String writeChinese(String s) { char[] orig =s.toCharArray(); byte[] dest =new byte[orig.length]; for(int i=0;i<orig.length;i++) dest[i] =(byte)(orig[i]&0xFF); try { ByteToCharConverter toChar =ByteToCharConverter.getConverter("gb2312"); return new String(toChar.convertAll(dest)); } catch(Exception e) { return s; } } //string\\\'s search and replace public String replace(String con ,String tag,String rep){ int j=0; int i=0; int k=0; String RETU=""; String temp =con; int tagc =tag.length(); while(i<con.length()){ if(con.substring(i).startsWith(tag)){ temp =con.substring(j,i)+rep; RETU+= temp; i+=tagc; j=i; } else{ i+=1; } } RETU +=con.substring(j); return RETU; } public Vector listValue(String con ,String tag){ int j=0; int i=0; int k=0; Vector vv=new Vector(); String temp =con; int tagc =tag.length(); while(i<con.length()){ if(con.substring(i).startsWith(tag)){ temp =con.substring(j,i); vv.addElement(temp); i+=tagc; j=i; } else{ i+=1; } } vv.addElement(con.substring(j)); return vv; } //filt the html code & sql symbol public String htmlencode(String s) { try { String temp = this.replace(s,"<","<"); temp = this.replace(temp,">",">"); temp = this.replace(temp,"\\\'","""); temp = this.replace(temp,"/"","""); temp = this.replace(temp," "," "); temp = this.replace(temp,"/n","<br>"); return temp; } catch(Exception e) { return s; } } //return the status of last operation public boolean getstatus() { return this.status; } //close all object public boolean close() { try { if (this.sqlCon != null) this.sqlCon.close(); if (this.rstSql != null) this.rstSql.close(); if (this.stmS != null) this.stmS.close(); this.status = true; return false; } catch(Exception e) { this.status = false; return true; } } } 返回类别: 教程 上一教程: java经典问题大集合 下一教程: java到structs 您可以阅读与"果果来看(一个封装了基本JDBC操作的类)"相关的教程: · Java JDBC连接的一个例子 · JAVAMAIL操作的总结(4) · 一个简朴的JDBC包装器 · 一个过滤html输入字符的类 · 给你个比较全的关于时间的操作的东西------ |
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