新闻发布项目——数据实现类（categoryTBDaoImpl）

package bdqn.newsMange.Dao.Impl;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import bdqn.newsMange.Dao.BaseDao;
import bdqn.newsMange.Dao.categoryTBDao;
import bdqn.newsMange.entity.categoryTB;

/**
 * 新闻类别实现类
 * 
 * @author Administrator
 * 
 */
public class categoryTBDaoImpl extends BaseDao implements categoryTBDao {

	// 查询
	public List<categoryTB> getCategoryTBAll() {
		String sql = "select categoryID,categoryName  from categoryTB";
		List<categoryTB> typelist = new ArrayList<categoryTB>();
		try {
			ResultSet rs = executeQurey(sql, null);
			while (rs.next()) {
				categoryTB cate = new categoryTB();
				cate.setCategoryID(rs.getInt(1));
				cate.setCategoryName(rs.getString(2));
				typelist.add(cate);
			}
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			closeAll();
		}

		return typelist;
	}

	// 添加
	public int addCategory(categoryTB cate) {
		int rel = 0;
		String sql = "insert categoryTB (categoryName) values(?)";
		List<Object> prams = new ArrayList<Object>();
		prams.add(cate.getCategoryName());
		try {
			rel = executeUpdate(sql, prams);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			closeAll();
		}
		return rel;
	}

	// 修改
	public int updateCategory(categoryTB cate) {
		int rel = 0;
		String sql = "update categoryTB set categoryName=? where categoryId=?";
		List<Object> prams = new ArrayList<Object>();
		prams.add(cate.getCategoryName());
		prams.add(cate.getCategoryID());                
		try {
			rel = executeUpdate(sql, prams);
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			closeAll();
		}
		return rel;
	} 

	// 删除
	public int delCategory(int id) {
		int rel = 0;
		String sql = "delete from categoryTB where categoryId=?";
		List<Object> prams = new ArrayList<Object>();
		prams.add(id);
		try {
			rel = executeUpdate(sql, prams);
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			closeAll();
		}
		return rel;
	}

	// 根据类别查询
	public categoryTB getCateByName(String catename) {
		categoryTB cate = null;
		String sql = "select categoryID,categoryName  from categoryTB where categoryName=?";
		List<Object> prams = new ArrayList<Object>();
		prams.add(catename);
		try {
			ResultSet rs = executeQurey(sql, prams);
			while (rs.next()) {
				cate = new categoryTB();
				cate.setCategoryID(rs.getInt("categoryId"));
				cate.setCategoryName(rs.getString("categoryName"));
			}
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			closeAll();
		}
		return cate;
	}

	// 获取类别，根据id
	public categoryTB getCateById(int id) {
		categoryTB cate = null;
		String sql = "select categoryID,categoryName  from categoryTB where categoryId=?";
		List<Object> prams = new ArrayList<Object>();
		prams.add(id);
		try {
			ResultSet rs = executeQurey(sql, prams);
			if (rs.next()) {
				cate = new categoryTB();
				cate.setCategoryID(rs.getInt(1));
				cate.setCategoryName(rs.getString(2));
			}
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			closeAll();
		}
		return cate;
	}

	public int categoryId(String categoryName) {
		int rel=0;
		String sql="select categoryID,CategoryName from categoryTB where categoryName=?";
		List<Object>prams=new ArrayList<Object>();
		prams.add(categoryName);
		ResultSet rs=null;
		try {
			 rs=executeQurey(sql, prams);
			if(rs.next()){
				categoryTB cate=new categoryTB();
				cate.setCategoryID(rs.getInt("CategoryID"));
				cate.setCategoryName(rs.getString("CategoryName"));
			}
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			closeAll();
		}
		
		return rel;
	}
	
}