oracle sqlload 导入数据

sqlload导入大量数据确实有大量优势，是一个比较好的工具。

  1 public class OracleLoadDataHelperUntil {
  2 
  3     private static String databaseUrl = ProperUtil.getValue("db.properties","jdbc.url");
  4 
  5     private static String user = ProperUtil.getValue("db.properties","jdbc.username");
  6 
  7     private static String pwd = ProperUtil.getValue("db.properties","jdbc.password");
  8 
  9     private static String driver = ProperUtil.getValue("db.properties","jdbc.driver");
 10 
 11     private static String fileRoute = "";
 12 
 13     /**
 14      * 链接数据库地址
 15      */
 16     private static String baseUrl = "";
 17 
 18     public OracleLoadDataHelperUntil() {
 19 
 20     }
 21 
 22     static {
 23         try {
 24             String url = databaseUrl.substring(databaseUrl.indexOf("@"));
 25             baseUrl = url.replaceAll("@","//").substring(0,url.lastIndexOf(":")+1) + "/"
 26                     + url.substring(url.lastIndexOf(":") + 1);
 27             Class.forName(driver);
 28         } catch (ClassNotFoundException e) {
 29             e.printStackTrace();
 30         }
 31     }
 32 
 33     /**
 34      * 根据表名称获取数据库字段
 35      * 
 36      * @param tableName
 37      * @return
 38      * @throws Exception
 39      */
 40     private static List<String> getFieldsByTableName(String tableName) throws Exception {
 41         List<String> fields = Lists.newArrayList();
 42         Connection conn = DriverManager.getConnection(databaseUrl,user,pwd);
 43         String sql = "select COLUMN_NAME from USER_TAB_COLUMNS where TABLE_NAME=upper(‘" + tableName + "‘)";
 44         Statement stmt = conn.createStatement();
 45         ResultSet rs = stmt.executeQuery(sql);
 46         String filed = "";
 47         while (rs.next()) {
 48             filed = rs.getString("COLUMN_NAME");
 49             fields.add(filed);
 50         }
 51         rs.close();
 52         conn.close();
 53         return fields;
 54     }
 55 
 56     /**
 57      * 获取控制命名字符串
 58      * 
 59      * @param fileName  导入的文件名，全路径
 60      * @param tableName 表名
 61      * @param delimiter 分割符
 62      * @return
 63      */
 64     private static String getStrCtr(String fileName,String tableName,String delimiter,List<String> fileds) {
 65         StringBuffer sb = new StringBuffer();
 66         String lineSeparator = System.getProperty("line.separator");
 67         // 0是从第一行开始 1是 从第二行
 68         sb.append("OPTIONS (skip=0)").append(lineSeparator);
 69         // 加载数据文件
 70         sb.append("LOAD DATA").append(lineSeparator);
 71         // 防止中文乱码
 72         sb.append("CHARACTERSET ZHS16GBK").append(lineSeparator);
 73         sb.append("INFILE ").append("‘").append(fileName).append("‘").append(lineSeparator);
 74         if(Strings.isStringEmpty(delimiter)) {
 75             sb.append(""str X‘170A‘"").append(lineSeparator);
 76         }
 77         // 覆盖写入
 78         sb.append("APPEND INTO TABLE ").append(tableName).append(lineSeparator);
 79         sb.append("REPLACE").append(lineSeparator);
 80         // 数据中每行记录用","分隔,TERMINATED用于控制字段的分隔符，可以为多个字符。
 81         if(Strings.isStringEmpty(delimiter)) {
 82             sb.append("FIELDS TERMINATED BY X‘lib‘").append(lineSeparator);
 83         }else {
 84             sb.append("FIELDS TERMINATED BY ‘"+delimiter+"‘").append(lineSeparator);
 85         }
 86         // 将数据写入对应的字段
 87         sb.append("trailing nullcols ( ").append(lineSeparator);
 88         sb.append(getFieldsStr(fileds)).append(lineSeparator);
 89         sb.append(")");
 90 
 91         return sb.toString();
 92     }
 93     
 94 
 95     private static String getFieldsStr(List<String> fileds) {
 96         StringJoiner sj = new StringJoiner("," + System.getProperty("line.separator"));
 97         for (String s : fileds) {
 98             sj.add(s);
 99         }
100         return sj.toString();
101     }
102 
103     /**
104      * 获取控制文件的路径
105      * 
106      * @param fileRoute   数据文件地址路径
107      * @param fileName    数据文件名
108      * @param tableName   表名
109      * @param delimiter   分隔符
110      * @param fieldNames  属性集合
111      * @param ctlfileName 控制文件名
112      * @return
113      */
114     private static String getCtlFileUrl(String fileRoute,String fileName,115             List<String> fieldNames,String ctlfileName) {
116         String ctlFileUrl = "";
117         FileWriter fw = null;
118         try {
119             String strctl = getStrCtr(fileRoute + fileName,tableName,delimiter,fieldNames);
120             fw = new FileWriter(fileRoute + "" + ctlfileName);
121             fw.write(strctl);
122             ctlFileUrl = fileRoute + "" + ctlfileName;
123         } catch (IOException e) {
124             e.printStackTrace();
125         } finally {
126             try {
127                 fw.flush();
128                 fw.close();
129             } catch (IOException e) {
130                 e.printStackTrace();
131             }
132         }
133         return ctlFileUrl;
134     }
135 
136     /**
137      * 判断是什么系统，true 为windows，false为linux
138      * 
139      * @return
140      */
141     private static Boolean isOsWin() {
142         Boolean flag = Boolean.FALSE;
143         String os = System.getProperty("os.name");
144         if (os.toLowerCase().startsWith("win")) {
145             flag = Boolean.TRUE;
146         }
147         return flag;
148     }
149 
150     /**
151      * 
152      * @param fileRoute   文件路径
153      * @param ctlfileName 控制文件路径
154      * @param logfileName 日志文件路径
155      * @param flag        是否立即执行，true执行命令，false不执行
156      * @return sqlload的执行语句
157      */
158     private static String excuteLoadData(String fileRoute,String ctlfileName,String logfileName,boolean flag) {
159         InputStream ins = null;
160         Process process = null;
161         String dos = "sqlldr " + user + "/" + pwd + "@" + baseUrl + " control=" + fileRoute + "" + ctlfileName + " log="
162                 + fileRoute + "" + logfileName;
163         System.out.println("dos:" + dos);
164         if(flag==false) {
165             return dos;
166         }
167         try {
168             if (isOsWin().equals(Boolean.FALSE)) {
169                 process = Runtime.getRuntime().exec(dos);
170             } else {
171                 String[] cmd = new String[] { "cmd.exe","/C",dos };
172                 process = Runtime.getRuntime().exec(cmd);
173             }
174             ins = process.getInputStream();
175             Charset charset=Charset.forName("GBK");
176             BufferedReader reader = new BufferedReader(new InputStreamReader(ins,charset));
177             String line = null;
178             while ((line = reader.readLine()) != null) {
179                 String msg = new String(line.getBytes(),"GBK");
180                 System.out.println(line);
181             }
182             int exitValue = process.waitFor();
183             if (exitValue == 0) {
184                 System.out.println("返回值：" + exitValue + "n数据导入成功");
185 
186             } else {
187                 System.out.println("返回值：" + exitValue + "n数据导入失败");
188             }
189             process.getOutputStream().close();
190         } catch (Exception e) {
191             e.printStackTrace();
192         }
193         return dos;
194     }
195 
196     /**
197      * 
198      * 执行sqlload数据导入方法
199      * 
200      * @param filePath 文件根路径
201      * @param fileName 数据文件 .dat文件
202      * @param tableName 表名
203      * @param fieldNames 属性字段
204      * @param flag 是否立即执行，true执行命令，false不执行
205      * @return sqlload的执行语句
206      * @throws Exception 
207      */
208 
209     public static String excuteSqlLoadImportData(String filePath,List<String> fields,boolean flag) throws Exception {
210         String str = "";
211         String ctlfileName = tableName + ".ctl";
212         String logfileName = tableName + ".log";
213         if (Strings.isStringEmpty(filePath)) {
214             filePath = fileRoute;
215         }
216         if(CollectionUtils.isEmpty(fields)) {
217             fields=getFieldsByTableName(tableName);
218         }
219         String fileUrl = getCtlFileUrl(filePath,fileName,fields,ctlfileName);
220         if (!Strings.isStringEmpty(fileUrl)) {
221             str = excuteLoadData(filePath,ctlfileName,logfileName,flag);
222         }
223         return str;
224     }
225 
226 }

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