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Copy pathSQL.java
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executable file
·226 lines (209 loc) · 6.29 KB
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package javaforce;
/** JDBC SQL helper. */
import java.util.*;
import java.sql.*;
public class SQL {
/** Last exception that occured. */
public Exception lastException;
/** Column names from last query. */
public String colNames[];
private java.sql.Connection conn;
/** Apache Derby SQL JDBC Class */
public static String derbySQL = "org.apache.derby.jdbc.EmbeddedDriver";
/** Microsoft SQL JDBC Class */
public static String msSQL = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
/** MySQL JDBC Class */
public static String mySQL = "com.mysql.jdbc.Driver";
/** Oracle JDBC Class */
public static String oracleSQL = "oracle.jdbc.driver.OracleDriver";
/** Init JDBC driver (need only call once) */
public static boolean initClass(String jdbcClass) {
try {
Class.forName(jdbcClass).newInstance();
return true;
} catch (Exception e) {
return false;
}
}
/** Connects to SQL Server. */
public boolean connect(String connectionURL) {
try {
conn = DriverManager.getConnection(connectionURL);
if ( conn == null ) {
return false;
}
return true;
} catch (Exception e) {
lastException = e;
return false;
}
}
/** Init JDBC driver and connects to SQL Server. */
public boolean connect(String jdbcClass, String connectionURL) {
if (!initClass(jdbcClass)) return false;
return connect(connectionURL);
}
/** Closes connection. */
public void close() {
if (conn != null) {
try { conn.close(); } catch (Exception e) { }
conn = null;
}
}
public void finalize() {
close();
}
/** Returns str with quotes around it (and replaces any pre-existing quotes with spaces). */
public static String quote(String str) {
char strca[] = str.toCharArray();
char strca2[] = new char[strca.length+2];
for(int a=0;a<strca.length;a++) {
switch (strca[a]) {
case '"':
case '\'':
strca2[a+1] = ' '; break;
default:
strca2[a+1] = strca[a]; break;
}
}
strca2[0] = '\'';
strca2[strca.length+1] = '\'';
return new String(strca2);
}
/** Executes a SQL query (no return data). */
public boolean execute(String str) {
java.sql.Statement stmt = null;
java.sql.ResultSet rs = null;
java.sql.ResultSetMetaData rsmd = null;
try {
stmt = conn.createStatement();
stmt.execute(str); //ignore return value (Exception will be thrown in an error)
stmt.close();
} catch (Exception e) {
lastException = e;
return false;
}
return true;
}
/** Executes a SQL query with one return value. */
public String select1value(String str) {
String ret;
java.sql.Statement stmt = null;
java.sql.ResultSet rs = null;
java.sql.ResultSetMetaData rsmd = null;
try {
stmt = conn.createStatement();
if (!stmt.execute(str)) throw new Exception();
rs = stmt.getResultSet();
rsmd = rs.getMetaData();
int colcnt = rsmd.getColumnCount();
colNames = new String[colcnt];
for(int c=0;c<colcnt;c++) colNames[c] = rsmd.getColumnName(c+1);
if (!rs.next()) {
stmt.close();
return null;
}
ret = rs.getString(1);
stmt.close();
} catch (Exception e) {
lastException = e;
return null;
}
return ret;
}
/** Executes a SQL query with one row of data. */
public String[] select1row(String str) {
String ret[];
java.sql.Statement stmt = null;
java.sql.ResultSet rs = null;
java.sql.ResultSetMetaData rsmd = null;
try {
stmt = conn.createStatement();
if (!stmt.execute(str)) throw new Exception();
rs = stmt.getResultSet();
rsmd = rs.getMetaData();
int colcnt = rsmd.getColumnCount();
colNames = new String[colcnt];
for(int c=0;c<colcnt;c++) colNames[c] = rsmd.getColumnName(c+1);
ret = new String[colcnt];
if (!rs.next()) {
stmt.close();
return null;
}
for(int a=0;a<colcnt;a++) {
ret[a] = rs.getString(a+1);
}
stmt.close();
} catch (Exception e) {
lastException = e;
return null;
}
return ret;
}
/** Executes a SQL query with one column of data. */
public String[] select1col(String str) {
ArrayList<String> rows = new ArrayList<String>();
java.sql.Statement stmt = null;
java.sql.ResultSet rs = null;
java.sql.ResultSetMetaData rsmd = null;
int colcnt;
try {
stmt = conn.createStatement();
if (!stmt.execute(str)) throw new Exception();
rs = stmt.getResultSet();
rsmd = rs.getMetaData();
colcnt = rsmd.getColumnCount();
colNames = new String[colcnt];
for(int c=0;c<colcnt;c++) colNames[c] = rsmd.getColumnName(c+1);
while (rs.next()) {
rows.add(rs.getString(1));
}
stmt.close();
} catch (Exception e) {
lastException = e;
return null;
}
String[] ret = new String[rows.size()];
for(int r=0;r<rows.size();r++) {
ret[r] = rows.get(r);
}
return ret;
}
/** Executes a SQL query and returns a table of data. */
public String[][] select(String str) {
ArrayList<String[]> rows = new ArrayList<String[]>();
String[] row;
java.sql.Statement stmt = null;
java.sql.ResultSet rs = null;
java.sql.ResultSetMetaData rsmd = null;
int colcnt;
try {
stmt = conn.createStatement();
if (!stmt.execute(str)) throw new Exception();
rs = stmt.getResultSet();
rsmd = rs.getMetaData();
colcnt = rsmd.getColumnCount();
colNames = new String[colcnt];
for(int c=0;c<colcnt;c++) colNames[c] = rsmd.getColumnName(c+1);
while (rs.next()) {
row = new String[colcnt];
rows.add(row);
for(int c=0;c<colcnt;c++) {
row[c] = rs.getString(c+1);
}
}
stmt.close();
} catch (Exception e) {
lastException = e;
return null;
}
String[][] ret = new String[rows.size()][];
for(int r=0;r<rows.size();r++) {
ret[r] = rows.get(r);
}
return ret;
}
public Exception getLastException() {
return lastException;
}
}