论文查询系统（二）
bean
package Bean; public class bean { private int id; private String name; private String pdf; private String author; private String title; private String booktitle; private String date; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPdf() { return pdf; } public void setPdf(String pdf) { this.pdf = pdf; } public String getAuthor() { return author; } public void setAuthor(String author) { this.author = author; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getBooktitle() { return booktitle; } public void setBooktitle(String booktitle) { this.booktitle = booktitle; } public String getDate() { return date; } public void setDate(String date) { this.date = date; } public bean(int id,String name,String pdf,String author,String title,String booktitle,String date) { this.id=id; this.name=name; this.pdf=pdf; this.author=author; this.title=title; this.booktitle=booktitle; this.date=date; } public bean(String name,String pdf,String author,String title,String booktitle,String date) { this.name=name; this.pdf=pdf; this.author=author; this.title=title; this.booktitle=booktitle; this.date=date; } }
Dao
package Dao; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import java.util.List; import DBUtil.DBUtil; import Bean.bean; public class Dao { public boolean insert(bean bean) { Connection conn = DBUtil.getConn(); PreparedStatement pstmt = null; boolean f = false; int a=0; try { String sql = "insert into pachong(id,name,pdf,author,title,booktitle,date) value(?,?,?,?,?,?,?)"; pstmt = conn.prepareStatement(sql); pstmt.setInt(1, bean.getId()); pstmt.setString(2, bean.getName()); pstmt.setString(3, bean.getPdf()); pstmt.setString(4, bean.getAuthor()); pstmt.setString(5, bean.getTitle()); pstmt.setString(6, bean.getBooktitle()); pstmt.setString(7, bean.getDate()); a = pstmt.executeUpdate(); } catch(SQLException e) { e.printStackTrace(); } finally { DBUtil.close(pstmt, conn); } if(a>0) f=true; return f; } public boolean delete(int id ) {//删除方法 String sql="delete from pachong where id='"+id+"'"; boolean f=false; Connection conn =DBUtil.getConn(); Statement st=null; try { st=conn.createStatement(); st.executeUpdate(sql); f=true; } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally{ DBUtil.close(st, conn); } return f; } public boolean update(bean bean) { String sql="update pachong set name='"+bean.getName()+"',pdf='"+bean.getPdf()+"',author='"+bean.getAuthor()+ "',title='"+bean.getTitle()+ "',booktitle='"+bean.getBooktitle()+"',date='"+bean.getDate()+"'where id='"+bean.getId()+"'"; Connection conn = DBUtil.getConn(); Statement state = null; boolean f = false; int a = 0; try { state = conn.createStatement(); System.out.println("看看是不是执行了"); a = state.executeUpdate(sql); System.out.println(a); } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(state, conn); } if (a > 0) { f = true; } System.out.println(f); return f; } /*public List<bean> chaxun(String id){ List<bean> list = new ArrayList<bean>(); try { Connection conn = DBUtil.getConn(); Statement state = null; String sql="select * from pachong where id=?"; PreparedStatement pstmt = conn.prepareStatement(sql); pstmt.setString(1,id); ResultSet rs = pstmt.executeQuery(); System.out.println("Dao成功运行************************"); while(rs.next()){ lu.setId(rs.getInt("id")); lu.setName(rs.getString("name")); lu.setPdf(rs.getString("pdf")); lu.setAuthor(rs.getString("author")); lu.setTitle(rs.getString("title")); lu.setBooktitle(rs.getString("booktitle")); lu.setDate(rs.getString("date")); bean lu = new bean(id,name,pdf,author,title,booktitle,date); 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> chaxun() { String sql = "select * from pachong"; List<bean> list = new ArrayList<>(); Connection conn = DBUtil.getConn(); Statement state = null; ResultSet rs = null; try { state = conn.createStatement(); rs = state.executeQuery(sql); bean bean = null; while (rs.next()) { int id = rs.getInt("id"); String name = rs.getString("name"); String pdf = rs.getString("pdf"); String author = rs.getString("author"); String title = rs.getString("title"); String booktitle = rs.getString("booktitle"); String date = rs.getString("date"); bean = new bean(id,name, pdf, author ,title,booktitle,date); list.add(bean); } } catch (SQLException e) { e.printStackTrace(); } finally { DBUtil.close(rs, state, conn); } return list; }*/ public List<bean> select(String minzi) { List<bean> list=new ArrayList<bean>(); Connection con; try { String sql="select * from pachong where name = ?"; con = DBUtil.getConn(); PreparedStatement pa=con.prepareStatement(sql); pa.setString(1,minzi ); ResultSet rs=pa.executeQuery(); while(rs.next()) { bean L = new bean(0, sql, sql, sql, sql, sql, sql); int id = rs.getInt("id"); String name= rs.getString("name"); String pdf = rs.getString("pdf"); String author = rs.getString("author"); String title = rs.getString("title"); String booktitle = rs.getString("booktitle"); String date = rs.getString("date"); L=new bean(id,name,pdf,author,title,booktitle,date); list.add(L); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } return list; } public List<bean> select1(String zz) { List<bean> list=new ArrayList<bean>(); Connection con; try { String sql="select * from pachong where author = ?"; con = DBUtil.getConn(); PreparedStatement pa=con.prepareStatement(sql); pa.setString(1,zz ); ResultSet rs=pa.executeQuery(); while(rs.next()) { bean L = new bean(0, sql, sql, sql, sql, sql, sql); int id = rs.getInt("id"); String name= rs.getString("name"); String pdf = rs.getString("pdf"); String author = rs.getString("author"); String title = rs.getString("title"); String booktitle = rs.getString("booktitle"); String date = rs.getString("date"); L=new bean(id,name,pdf,author,title,booktitle,date); list.add(L); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } return list; } }
