//JAVA版SqlHelper
package com.test.Dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.jsp.jstl.sql.Result;
import javax.servlet.jsp.jstl.sql.ResultSupport;
public class SqlHelper {
public String query(String sql)
{
String result="";
try{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn= DriverManager.getConnection("jdbc:sqlserver://116.255.154.99;DatabaseName=test;user=sa;password=Tcqbb1989");
String sql1 = "select * from article";
Statement stmt=conn.createStatement();
ResultSet rs = stmt.executeQuery(sql1);
while(rs.next()){
result+=rs.getString(1)+"===="+rs.getString(2)+"</br>";
}
}catch(Exception e){
result+=e.getMessage();
}
return result;
}
public List query2(String sql)
{
ResultSet result = null;
try{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn= DriverManager.getConnection("jdbc:sqlserver://116.255.154.99;DatabaseName=test;user=sa;password=Tcqbb1989");
String sql1 = "select * from article";
Statement stmt=conn.createStatement();
ResultSet rs = stmt.executeQuery(sql1);
return resultSetToList(rs);
}catch(Exception e){
}
return null;
}
public int excute(String sql)
{
String result="";
int rows1 =0;
try{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn= DriverManager.getConnection("jdbc:sqlserver://116.255.154.99;DatabaseName=test;user=sa;password=Tcqbb1989");
Statement stmt=conn.createStatement();
rows1 = stmt.executeUpdate(sql);
}catch(Exception e){
result+=e.getMessage();
}
return rows1;
}
public List resultSetToList(ResultSet rs) throws java.sql.SQLException {
if (rs == null)
return Collections.EMPTY_LIST;
ResultSet md = (ResultSet) rs.getMetaData(); //得到结果集(rs)的结构信息，比如字段数、字段名等
int columnCount = ((ResultSetMetaData) md).getColumnCount(); //返回此 ResultSet 对象中的列数
List list = new ArrayList();
Map rowData = new HashMap();
while (rs.next()) {
rowData = new HashMap(columnCount);
for (int i = 1; i <= columnCount; i++) {
rowData.put(((ResultSetMetaData) md).getColumnName(i), rs.getObject(i));
}
list.add(rowData);
System.out.println("list:" + list.toString());
}
return list;
}
}
