forked from xichangqi/PocketBlogCode
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathWriteControl.java
More file actions
326 lines (287 loc) · 7.96 KB
/
Copy pathWriteControl.java
File metadata and controls
326 lines (287 loc) · 7.96 KB
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
package com.blog.dao;
import static com.blog.dao.ConnectionUtil.closeConnect;
import static com.blog.dao.ConnectionUtil.getConnection;
import static com.blog.dao.ConnectionUtil.getMax;
import static com.blog.dao.ConstantUtil.DIARY;
import static com.blog.dao.ConstantUtil.DIARY_FAIL;
import static com.blog.dao.ConstantUtil.DIARY_SUCCESS;
import static com.blog.dao.ConstantUtil.UPDATE_STATE_FAIL;
import static com.blog.dao.ConstantUtil.UPDATE_STATE_SUCCESS;
import static com.blog.dao.ConstantUtil.COMMENT;
import static com.blog.dao.ConstantUtil.VISIT;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import com.blog.bean.Diary;
import com.blog.bean.Comments;
public class WriteControl
{
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
// 更新心情
public String updateState(String u_no, String state)
{
String result = null;
con = getConnection();
try
{
ps = con.prepareStatement("update user set u_state=? where u_no=?");
ps.setString(1, state);
ps.setInt(2, Integer.valueOf(u_no));
int count = ps.executeUpdate();
if (count == 1) // 修改成功
{
result = UPDATE_STATE_SUCCESS;
}
else
{
result = UPDATE_STATE_FAIL;
}
}
catch (SQLException e)
{
e.printStackTrace();
} finally
{
closeConnect(con, ps);
}
return result;
}
// 写入新日志
public String writeNewDiary(String title, String content, String author)
{
String result = null;
int diary_id = getMax(DIARY);
try
{
con = getConnection();
ps = con
.prepareStatement("insert into diary(r_id,r_title,r_content,u_no) values(?,?,?,?) ");
ps.setInt(1, diary_id);
ps.setString(2, title);
ps.setString(3, content);
ps.setInt(4, Integer.valueOf(author)); // 用户ID
int count = ps.executeUpdate();
if (count == 1)
{
result = DIARY_SUCCESS;
} else
{
result = DIARY_FAIL;
}
} catch (SQLException e)
{
e.printStackTrace();
} finally
{
closeConnect(con, ps);
}
return result;
}
// 得到某用户日志总数
public int getDiarySize(String u_no)
{
int result = 0;
try
{
con = getConnection();
ps = con
.prepareStatement("select count(r_id) as count from diary where u_no=?");
ps.setInt(1, Integer.valueOf(u_no)); // 设置参数
rs = ps.executeQuery();
if (rs.next())
{ // 查看结果集 只有一条数据，就是日志数量
result = rs.getInt(1);
}
} catch (Exception e)
{
e.printStackTrace();
} finally
{
closeConnect(con, ps);
}
return result;
}
// 查询用户的日记列表的方法
public ArrayList<Diary> getUserDiary(String u_no, int currentPage, int span)
{
ArrayList<Diary> result = new ArrayList<Diary>();
// 声明结果集对象
int start = (currentPage - 1) * span; // 计算起始位置
String sql = "select diary.r_id,diary.r_title,diary.r_content,date_format(diary.r_date,'%Y-%c-%e %k:%i:%s'),diary.u_no,user.u_name from diary,user where diary.u_no=? and diary.u_no=user.u_no order by diary.r_date desc limit ?,?"; // 构建语句对象
// 日记标题、日记内容、日记时间、日记所属者、日记所属者昵称
try
{
con = getConnection(); // 获得连接
ps = con.prepareStatement(sql);
ps.setInt(1, Integer.valueOf(u_no));
ps.setInt(2, start);
ps.setInt(3, span);
rs = ps.executeQuery(); // 执行查询
while (rs.next())
{ // 读取结果集生成日记对象
String rid = rs.getInt(1) + "";
String title = rs.getString(2);
String content = rs.getString(3);
String date = rs.getString(4);
String uno = rs.getInt(5) + "";
String uname = rs.getString(6);
Diary d = new Diary(rid, title, content, uname, uno, date);
result.add(d);
}
for (Diary d : result)
{ // 为每个日记生成评论列表
ArrayList<Comments> cmtList = getComments(d.rid);
d.setCommentList(cmtList);
}
} catch (Exception e)
{
e.printStackTrace();
} finally
{
closeConnect(con, ps);
}
return result;
}
// 获取用户日志评论列表的方法
public ArrayList<Comments> getComments(String r_id)
{
ArrayList<Comments> result = new ArrayList<Comments>();
String sql = "select date_format(comment.c_date,'%Y-%c-%e %k:%i:%s'),comment.c_content,user.u_name,comment.u_no"
+ " from comment,user where comment.r_id=? and user.u_no=comment.u_no order by comment.c_date desc";
try
{
con = getConnection(); // 获得连接
ps = con.prepareStatement(sql); // 获得预编译语句
ps.setInt(1, Integer.valueOf(r_id)); // 设置参数
rs = ps.executeQuery(); // 执行查询
while (rs.next())
{
String date = rs.getString(1);
String content = rs.getString(2);
String uname = rs.getString(3);
String uno = rs.getString(4) + "";
Comments c = new Comments(date, content, uname, uno);
result.add(c);
}
} catch (Exception e)
{
e.printStackTrace();
} finally
{
closeConnect(con, ps);
}
return result;
}
public int addComment(String c_comment,String r_id,String u_no){
int result = -1;
Connection con = null;
PreparedStatement ps = null;
try{
con = getConnection(); //获得数据库连接
ps = con.prepareStatement("insert into comment(c_id,c_content,u_no,r_id) values(?,?,?,?)");
ps.setInt(1, getMax(COMMENT)); //设置自动编号的值
ps.setString(2, c_comment); //设置评论内容字段
ps.setInt(3, Integer.valueOf(u_no)); //设置用户编号
ps.setInt(4, Integer.valueOf(r_id)); //设置日记编号
result = ps.executeUpdate(); //执行插入操作
}catch(Exception e){
e.printStackTrace();
}
finally{
closeConnect(con, ps);
}
return result;
}
//添加访问记录
public int addVisitor(String host,String visitor){
int result = -1;
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
int hostId = Integer.valueOf(host); //主人的id
int visitorId = Integer.valueOf(visitor); //访问者的id
try{
con = getConnection(); //获得数据库连接
//首先查看Visitor是否来过
ps = con.prepareStatement("select v_no from visit where u_no=? and v_no=?");
ps.setInt(1, hostId); //设置主人id
ps.setInt(2, visitorId);
rs = ps.executeQuery();
if(rs.next()){ //提取结果集数据
ps = con.prepareStatement("update visit set v_date=now() where u_no=? and v_no=?");
ps.setInt(1, hostId); //设置主人id
ps.setInt(2, visitorId); //设置访客id
result = ps.executeUpdate(); //执行更新
}
else{ //最新的那个访客和当前访客不相同
ps = con.prepareStatement("insert into visit(v_id,u_no,v_no) values(?,?,?)");
ps.setInt(1, getMax(VISIT)); //设置主键值
ps.setInt(2, Integer.valueOf(host)); //设置主人id
ps.setInt(3, Integer.valueOf(visitor)); //设置访客id
result = ps.executeUpdate(); //执行查询
}
}
catch(Exception e){
e.printStackTrace();
}
finally{
closeConnect(con, ps);
}
return result;
}
//方法：删除指定日记
public int deleteDiary(String rid){
int result = -1;
try{
deleteAllCommentByDiary(rid); //先删除评论
con = getConnection();
ps = con.prepareStatement("delete from diary where r_id=?");
ps.setInt(1, Integer.valueOf(rid));
result = ps.executeUpdate();
}catch(Exception e){
e.printStackTrace();
}
finally{
closeConnect(con, ps);
}
return result;
}
//方法：删除指定日志的所有评论
public int deleteAllCommentByDiary(String rid){
int result = 0;
try{
con = getConnection();
ps = con.prepareStatement("delete from comment where r_id=?");
ps.setInt(1, Integer.valueOf(rid));
result = ps.executeUpdate();
}catch(Exception e){
e.printStackTrace();
}
finally{
closeConnect(con, ps);
}
return result;
}
//方法：修改指定日志
public int modifyDiary(String rid,String rtitle,String rcontent){
int result = 0;
try{
con = getConnection();
ps = con.prepareStatement("update diary set r_title=?,r_content=?,r_date=now() where r_id=?");
ps.setString(1,rtitle);
ps.setString(2,rcontent);
ps.setInt(3, Integer.valueOf(rid));
result = ps.executeUpdate();
}catch(Exception e){
e.printStackTrace();
}
finally{
closeConnect(con, ps);
}
return result;
}
}