每日总结11

package Dao;
import Bean.Menu;
import Bean.bean;

import DBUtil.dbutil;

import java.io.Reader;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;

public class dao {

    public List<bean> searchAll( ){
        List<bean> list = new ArrayList<bean>();
        try {
            Connection conn = dbutil.getConn();
            Statement state = null;
            String sql="select * from policy";
            PreparedStatement  pstmt = conn.prepareStatement(sql);
            ResultSet rs = pstmt.executeQuery();
            System.out.println("搜索全部政策");
            while(rs.next()){
                bean lu = new bean();

                lu.setId(rs.getString("id"));
                lu.setType(rs.getString("type"));
                lu.setOrgan(rs.getString("organ"));
                lu.setPubdata(rs.getString("pubdata"));
                lu.setName(rs.getString("name"));
                list.add(lu);

            }
            rs.close();
            pstmt.close();
            conn.close();
        }catch(SQLException e) {

            System.out.println("发生错误");
            e.printStackTrace();


        }


        return list;

    }


    public List<bean> search(String name,String document,String organ){
        List<bean> list = new ArrayList<bean>();
        try {
            Connection conn = dbutil.getConn();
            Statement state = null;



            String sql = "select * from policy where name REGEXP '"+name+"' and document REGEXP '"+document+"' and organ REGEXP '"+organ+"'";

            PreparedStatement  pstmt = conn.prepareStatement(sql);

            ResultSet rs = pstmt.executeQuery();
            System.out.println("多项条件搜索运行中");
            while(rs.next()){

                bean lu = new bean();

                lu.setId(rs.getString("id"));
                lu.setType(rs.getString("type"));
                lu.setOrgan(rs.getString("organ"));
                lu.setPubdata(rs.getString("pubdata"));
                lu.setName(rs.getString("name"));
                list.add(lu);


            }
            rs.close();
            pstmt.close();
            conn.close();
        }catch(SQLException e) {

            System.out.println("发生错误");
            e.printStackTrace();


        }


        return list;

    }

    public static bean getOne(String id){
        bean lu = new bean();
        try {
            Connection conn = dbutil.getConn();
            Statement state = null;
            String sql="select * from policy where id=?";
            PreparedStatement  pstmt = conn.prepareStatement(sql);
            pstmt.setString(1,id);
            ResultSet rs = pstmt.executeQuery();
            while(rs.next()){

                lu.setId(rs.getString("id"));
                lu.setType(rs.getString("type"));
                lu.setCategory(rs.getString("category"));
                lu.setOrgan(rs.getString("organ"));
                lu.setPubdata(rs.getString("pubdata"));
                lu.setName(rs.getString("name"));
                lu.setDocument(rs.getString("document"));
                lu.setRange(rs.getString("range"));
                lu.setPerdata(rs.getString("perdata"));
                lu.setViadata(rs.getString("viadata"));
                lu.setText(rs.getString("text"));

            }
            rs.close();
            pstmt.close();
            conn.close();
        }
        catch(SQLException e) {

            e.printStackTrace();
        }
        return lu;

    }

    
}

 

今日学习时长半天，下午学习了代码的规划，了解了代码单元性的重要性，让自己的代码更加整洁，清楚，能够让别人更好的看懂自己的代码，并且能够让自己修改代码的时候更加方便