每日总结-政策查询
所花时间：2小时
代码量：如下：
博客量：本学期截至目前45篇
了解到的知识点：政策查询
上午没课，学了一会代码，然后下午上了王建民老师的课程，建民老师让我们实现科技查询政策的一些代码，按发布时间顺序，并且政策当鼠标点过去之后才能显示完整的内容，到了晚上继续搞了搞这个代码。
相关代码：
servlet：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | package service;import bean.policy;import dao.Dao;import javax.servlet.*;import javax.servlet.http.*;import javax.servlet.annotation.*;import java.io.IOException;import java.util.ArrayList;import java.util.List;public class Servlet extends HttpServlet { Dao dao=new Dao(); public void service(HttpServletRequest request,HttpServletResponse response) throws IOException, ServletException { request.setCharacterEncoding("UTF-8"); String message=request.getParameter("method"); if(message.equals("all")){ all(request,response); } else if(message.equals("chakan")){ chakan(request,response); } else if(message.equals("suoyou")){ suoyou(request,response); } else if(message.equals("chadata")){ chadata(request,response); } } public void suoyou(HttpServletRequest request,HttpServletResponse response) throws IOException, ServletException{ request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); int cpage=1; //当前页数 int count=10; //每页显示数 String cp=request.getParameter("cp"); if(cp!=null){ cpage=Integer.parseInt(cp); } int arr[]=dao.alltext(count); ArrayList<policy> policies=new ArrayList<>(); policies=dao.chaxuntext(cpage,count); request.setAttribute("policies",policies); request.setAttribute("cpage",cpage); request.setAttribute("sum",arr[0]); request.setAttribute("tpage",arr[1]); request.setAttribute("dd","d"); request.getRequestDispatcher("index.jsp").forward(request,response); } public void chadata(HttpServletRequest request,HttpServletResponse response) throws IOException, ServletException{ request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); int cpage=1; //当前页数 int count=10; //每页显示数 String cp=request.getParameter("cp"); if(cp!=null){ cpage=Integer.parseInt(cp); } int[]s = new int[2]; int zero=0; ArrayList<policy> policies=new ArrayList<>(); String name=request.getParameter("name"); String document=request.getParameter("document"); String organ=request.getParameter("organ"); if(name!=null&&!name.equals("")&&document!=null&&!document.equals("")&&organ!=null&&!organ.equals("")){ policies=dao.chaxun3(cpage,count,name,document,organ); } else if(name!=null&&!name.equals("")&&document!=null&&!document.equals("")){ policies=dao.chaxunnameanddocument(cpage,count,name,document); } else if(name!=null&&!name.equals("")&&organ!=null&&!organ.equals("")){ policies=dao.chaxunnameandorgan(cpage,count,name,organ); } else if(document!=null&&!document.equals("")&&organ!=null&&!organ.equals("")){ policies=dao.chaxundocumentandorgan(cpage,count,organ,document); } else if(name!=null&&!name.equals("")){ policies=dao.chaxunname(cpage,count,name); s=dao.allchaxunname(count,name); } else if(document!=null&&!document.equals("")){ policies=dao.chaxundocument(cpage,count,document); s=dao.allchaxundo(count,document); } else if(organ!=null&&!organ.equals("")){ policies=dao.chaxunorgan(cpage,count,organ); s=dao.allchaxunorgan(count,organ); } else{ request.setAttribute("message","未查询到相关信息"); request.setAttribute("policies",null); request.setAttribute("cpage",zero); request.setAttribute("sum",zero); request.setAttribute("tpage",zero); request.getRequestDispatcher("index.jsp").forward(request,response); return; } if(policies.size()>0) request.setAttribute("policies",policies); else { request.setAttribute("message","未查询到相关信息"); request.setAttribute("policies",null); request.setAttribute("cpage",0); request.setAttribute("sum",policies.size()); request.setAttribute("tpage",policies.size()%10==0?policies.size()/10:policies.size()/10+1); request.getRequestDispatcher("index.jsp").forward(request,response); return; } request.setAttribute("cpage",cpage); request.setAttribute("sum",s[0]); request.setAttribute("name",name); request.setAttribute("organ",organ); request.setAttribute("document",document); request.setAttribute("tpage",s[1]); request.setAttribute("dd","dd"); request.getRequestDispatcher("index.jsp").forward(request,response); } public void all(HttpServletRequest request,HttpServletResponse response) throws IOException, ServletException { request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); ArrayList<policy> policies=dao.getall(); request.setAttribute("policies",policies); request.getRequestDispatcher("index.jsp").forward(request,response); } public void chakan(HttpServletRequest request,HttpServletResponse response) throws IOException, ServletException { request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); String id0=request.getParameter("id"); int id=Integer.parseInt(id0); policy p=dao.getdetail(id); request.setAttribute("policy",p); request.getRequestDispatcher("detail.jsp").forward(request,response); }} |
Dao：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 | package dao;import bean.policy;import com.mysql.cj.jdbc.result.UpdatableResultSet;import util.DButil;import java.sql.*;import java.util.ArrayList;import java.util.List;import java.util.Set;public class Dao { public ArrayList<policy> getall(){ ArrayList<policy> policies=new ArrayList<>(); try{ Connection connection= DButil.getConn(); String sql="select * from policy"; Statement statement=connection.createStatement(); ResultSet resultSet=statement.executeQuery(sql); while(resultSet.next()){ policy p=new policy(); p.setId(resultSet.getInt("id")); p.setName(resultSet.getString("name")); p.setType(resultSet.getString("type")); p.setCategory(resultSet.getString("category")); p.setRange(resultSet.getString("range")); p.setDocument(resultSet.getString("document")); p.setForm(resultSet.getString("form")); p.setOrgan(resultSet.getString("organ")); p.setViadata(resultSet.getString("viadata")); p.setPubdata(resultSet.getString("pubdata")); p.setPerdata(resultSet.getString("perdata")); policies.add(p); } }catch (Exception e){ e.printStackTrace(); } return policies; } public ArrayList<policy> chaxuntext(int cpage, int count){ String sql="select * from policy order by pubdata limit "+((cpage-1)*count)+","+count; ArrayList<policy> texts=new ArrayList<>(); try { Connection connection = DButil.getConn(); Statement statement = connection.createStatement(); ResultSet resultSet=statement.executeQuery(sql); while(resultSet.next()){ policy p=new policy(); p.setId(resultSet.getInt("id")); p.setName(resultSet.getString("name")); p.setType(resultSet.getString("type")); p.setCategory(resultSet.getString("category")); p.setRange(resultSet.getString("range")); p.setDocument(resultSet.getString("document")); p.setForm(resultSet.getString("form")); p.setOrgan(resultSet.getString("organ")); p.setViadata(resultSet.getString("viadata")); p.setPubdata(resultSet.getString("pubdata")); p.setPerdata(resultSet.getString("perdata")); p.setText(resultSet.getString("text")); texts.add(p); } } catch (SQLException | ClassNotFoundException e) { throw new RuntimeException(e); } return texts; } public ArrayList<policy> chaxunname(int cpage, int count,String name){ String sql="select * from policy where name like ? order by pubdata limit "+((cpage-1)*count)+","+count; ArrayList<policy> texts=new ArrayList<>(); try { Connection connection = DButil.getConn(); PreparedStatement preparedStatement=connection.prepareStatement(sql); preparedStatement.setString(1,"%"+name+"%"); ResultSet resultSet=preparedStatement.executeQuery(); while(resultSet.next()){ policy p=new policy(); p.setId(resultSet.getInt("id")); p.setName(resultSet.getString("name")); p.setType(resultSet.getString("type")); p.setCategory(resultSet.getString("category")); p.setRange(resultSet.getString("range")); p.setDocument(resultSet.getString("document")); p.setForm(resultSet.getString("form")); p.setOrgan(resultSet.getString("organ")); p.setViadata(resultSet.getString("viadata")); p.setPubdata(resultSet.getString("pubdata")); p.setPerdata(resultSet.getString("perdata")); p.setText(resultSet.getString("text")); texts.add(p); } } catch (SQLException | ClassNotFoundException e) { throw new RuntimeException(e); } return texts; } public ArrayList<policy> chaxundocument(int cpage, int count,String name){ String sql="select * from policy where document like ? order by pubdata limit "+((cpage-1)*count)+","+count; ArrayList<policy> texts=new ArrayList<>(); try { Connection connection = DButil.getConn(); PreparedStatement preparedStatement=connection.prepareStatement(sql); preparedStatement.setString(1,"%"+name+"%"); ResultSet resultSet=preparedStatement.executeQuery(); while(resultSet.next()){ policy p=new policy(); p.setId(resultSet.getInt("id")); p.setName(resultSet.getString("name")); p.setType(resultSet.getString("type")); p.setCategory(resultSet.getString("category")); p.setRange(resultSet.getString("range")); p.setDocument(resultSet.getString("document")); p.setForm(resultSet.getString("form")); p.setOrgan(resultSet.getString("organ")); p.setViadata(resultSet.getString("viadata")); p.setPubdata(resultSet.getString("pubdata")); p.setPerdata(resultSet.getString("perdata")); p.setText(resultSet.getString("text")); texts.add(p); } } catch (SQLException | ClassNotFoundException e) { throw new RuntimeException(e); } return texts; } public ArrayList<policy> chaxunorgan(int cpage, int count,String name){ String sql="select * from policy where organ like ? order by pubdata limit "+((cpage-1)*count)+","+count; ArrayList<policy> texts=new ArrayList<>(); try { Connection connection = DButil.getConn(); PreparedStatement preparedStatement=connection.prepareStatement(sql); preparedStatement.setString(1,"%"+name+"%"); ResultSet resultSet=preparedStatement.executeQuery(); while(resultSet.next()){ policy p=new policy(); p.setId(resultSet.getInt("id")); p.setName(resultSet.getString("name")); p.setType(resultSet.getString("type")); p.setCategory(resultSet.getString("category")); p.setRange(resultSet.getString("range")); p.setDocument(resultSet.getString("document")); p.setForm(resultSet.getString("form")); p.setOrgan(resultSet.getString("organ")); p.setViadata(resultSet.getString("viadata")); p.setPubdata(resultSet.getString("pubdata")); p.setPerdata(resultSet.getString("perdata")); p.setText(resultSet.getString("text")); texts.add(p); } } catch (SQLException | ClassNotFoundException e) { throw new RuntimeException(e); } return texts; } public ArrayList<policy> chaxun3(int cpage, int count,String name,String document,String organ){ String sql="select * from policy where organ like ? and name like ? and document like ? order by pubdata limit "+((cpage-1)*count)+","+count; ArrayList<policy> texts=new ArrayList<>(); try { Connection connection = DButil.getConn(); PreparedStatement preparedStatement=connection.prepareStatement(sql); preparedStatement.setString(1,"%"+organ+"%"); preparedStatement.setString(2,"%"+name+"%"); preparedStatement.setString(3,"%"+document+"%"); ResultSet resultSet=preparedStatement.executeQuery(); while(resultSet.next()){ policy p=new policy(); p.setId(resultSet.getInt("id")); p.setName(resultSet.getString("name")); p.setType(resultSet.getString("type")); p.setCategory(resultSet.getString("category")); p.setRange(resultSet.getString("range")); p.setDocument(resultSet.getString("document")); p.setForm(resultSet.getString("form")); p.setOrgan(resultSet.getString("organ")); p.setViadata(resultSet.getString("viadata")); p.setPubdata(resultSet.getString("pubdata")); p.setPerdata(resultSet.getString("perdata")); p.setText(resultSet.getString("text")); texts.add(p); } } catch (SQLException | ClassNotFoundException e) { throw new RuntimeException(e); } return texts; } public ArrayList<policy> chaxunnameanddocument(int cpage, int count,String name,String document){ String sql="select * from policy where name like ? and document like ? order by pubdata limit "+((cpage-1)*count)+","+count; ArrayList<policy> texts=new ArrayList<>(); try { Connection connection = DButil.getConn(); PreparedStatement preparedStatement=connection.prepareStatement(sql); preparedStatement.setString(1,"%"+name+"%"); preparedStatement.setString(2,"%"+document+"%"); ResultSet resultSet=preparedStatement.executeQuery(); while(resultSet.next()){ policy p=new policy(); p.setId(resultSet.getInt("id")); p.setName(resultSet.getString("name")); p.setType(resultSet.getString("type")); p.setCategory(resultSet.getString("category")); p.setRange(resultSet.getString("range")); p.setDocument(resultSet.getString("document")); p.setForm(resultSet.getString("form")); p.setOrgan(resultSet.getString("organ")); p.setViadata(resultSet.getString("viadata")); p.setPubdata(resultSet.getString("pubdata")); p.setPerdata(resultSet.getString("perdata")); p.setText(resultSet.getString("text")); texts.add(p); } } catch (SQLException | ClassNotFoundException e) { e.printStackTrace(); } return texts; } public ArrayList<policy> chaxunnameandorgan(int cpage, int count,String name,String organ){ String sql="select * from policy where name like ? and organ like ? order by pubdata limit "+((cpage-1)*count)+","+count; ArrayList<policy> texts=new ArrayList<>(); try { Connection connection = DButil.getConn(); PreparedStatement preparedStatement=connection.prepareStatement(sql); preparedStatement.setString(1,"%"+name+"%"); preparedStatement.setString(2,"%"+organ+"%"); ResultSet resultSet=preparedStatement.executeQuery(); while(resultSet.next()){ policy p=new policy(); p.setId(resultSet.getInt("id")); p.setName(resultSet.getString("name")); p.setType(resultSet.getString("type")); p.setCategory(resultSet.getString("category")); p.setRange(resultSet.getString("range")); p.setDocument(resultSet.getString("document")); p.setForm(resultSet.getString("form")); p.setOrgan(resultSet.getString("organ")); p.setViadata(resultSet.getString("viadata")); p.setPubdata(resultSet.getString("pubdata")); p.setPerdata(resultSet.getString("perdata")); p.setText(resultSet.getString("text")); texts.add(p); } } catch (SQLException | ClassNotFoundException e) { throw new RuntimeException(e); } return texts; } public ArrayList<policy> chaxundocumentandorgan(int cpage, int count,String organ,String document){ String sql="select * from policy where organ like ? and document like ? order by pubdata limit "+((cpage-1)*count)+","+count; ArrayList<policy> texts=new ArrayList<>(); try { Connection connection = DButil.getConn(); PreparedStatement preparedStatement=connection.prepareStatement(sql); preparedStatement.setString(1,"%"+organ+"%"); preparedStatement.setString(2,"%"+document+"%"); ResultSet resultSet=preparedStatement.executeQuery(); while(resultSet.next()){ policy p=new policy(); p.setId(resultSet.getInt("id")); p.setName(resultSet.getString("name")); p.setType(resultSet.getString("type")); p.setCategory(resultSet.getString("category")); p.setRange(resultSet.getString("range")); p.setDocument(resultSet.getString("document")); p.setForm(resultSet.getString("form")); p.setOrgan(resultSet.getString("organ")); p.setViadata(resultSet.getString("viadata")); p.setPubdata(resultSet.getString("pubdata")); p.setPerdata(resultSet.getString("perdata")); p.setText(resultSet.getString("text")); texts.add(p); } } catch (SQLException | ClassNotFoundException e) { throw new RuntimeException(e); } return texts; } public int[] alltext(int count){ String sql="select count(*) from policy"; int[] s=new int[2]; try{ Connection connection=DButil.getConn(); Statement statement=connection.createStatement(); ResultSet resultSet=statement.executeQuery(sql); while(resultSet.next()){ s[0]=resultSet.getInt(1); } if(s[0]%count==0) s[1]=s[0]/count; else s[1]=s[0]/count+1; } catch (Exception e) { e.printStackTrace(); } return s; } public int[] allchaxunname(int count,String name){ String sql="select count(*) from policy where name like ?"; int[] s=new int[2]; try{ Connection connection=DButil.getConn(); PreparedStatement statement=connection.prepareStatement(sql); statement.setString(1,"%"+name+"%"); ResultSet resultSet= statement.executeQuery(); while(resultSet.next()){ s[0]=resultSet.getInt(1); } if(s[0]%count==0) s[1]=s[0]/count; else s[1]=s[0]/count+1; } catch (Exception e) { e.printStackTrace(); } return s; } public int[] allchaxundo(int count,String name){ String sql="select count(*) from policy where document like ?"; int[] s=new int[2]; try{ Connection connection=DButil.getConn(); PreparedStatement statement=connection.prepareStatement(sql); statement.setString(1,"%"+name+"%"); ResultSet resultSet= statement.executeQuery(); while(resultSet.next()){ s[0]=resultSet.getInt(1); } if(s[0]%count==0) s[1]=s[0]/count; else s[1]=s[0]/count+1; } catch (Exception e) { e.printStackTrace(); } return s; } public int[] allchaxunorgan(int count,String name){ String sql="select count(*) from policy where organ like ?"; int[] s=new int[2]; try{ Connection connection=DButil.getConn(); PreparedStatement statement=connection.prepareStatement(sql); statement.setString(1,"%"+name+"%"); ResultSet resultSet= statement.executeQuery(); while(resultSet.next()){ s[0]=resultSet.getInt(1); } if(s[0]%count==0) s[1]=s[0]/count; else s[1]=s[0]/count+1; } catch (Exception e) { e.printStackTrace(); } return s; } public policy getdetail(int id){ policy p=new policy(); try{ Connection connection= DButil.getConn(); String sql="select * from policy where id=?"; PreparedStatement preparedStatement=connection.prepareStatement(sql); preparedStatement.setInt(1,id); ResultSet resultSet=preparedStatement.executeQuery(); while(resultSet.next()){ p.setId(resultSet.getInt("id")); p.setName(resultSet.getString("name")); p.setType(resultSet.getString("type")); p.setCategory(resultSet.getString("category")); p.setRange(resultSet.getString("range")); p.setDocument(resultSet.getString("document")); p.setForm(resultSet.getString("form")); p.setOrgan(resultSet.getString("organ")); p.setViadata(resultSet.getString("viadata")); p.setPubdata(resultSet.getString("pubdata")); p.setPerdata(resultSet.getString("perdata")); p.setText(resultSet.getString("text")); } }catch (Exception e){ e.printStackTrace(); } return p; }} |
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