{"id":1102,"date":"2019-06-17T00:23:27","date_gmt":"2019-06-16T15:23:27","guid":{"rendered":"https:\/\/oboki.net\/workspace\/?p=1102"},"modified":"2019-09-01T22:19:51","modified_gmt":"2019-09-01T13:19:51","slug":"maven-jdbc-%ed%94%84%eb%a1%9c%ec%a0%9d%ed%8a%b8-%ec%83%9d%ec%84%b1%ed%95%98%ea%b8%b0","status":"publish","type":"post","link":"https:\/\/oboki.net\/workspace\/java\/maven-jdbc-%ed%94%84%eb%a1%9c%ec%a0%9d%ed%8a%b8-%ec%83%9d%ec%84%b1%ed%95%98%ea%b8%b0\/","title":{"rendered":"[Java] Maven JDBC \ud504\ub85c\uc81d\ud2b8 \uc0dd\uc131\ud558\uae30"},"content":{"rendered":"

[Java] Maven JDBC \ud504\ub85c\uc81d\ud2b8 \uc0dd\uc131\ud558\uae30<\/h1>\n

\uce74\uce74\uc624\ubc45\ud06c \ucf54\ub529\ud14c\uc2a4\ud2b8 \ubb38\uc81c\ub85c \ub098\uc654\ub358 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud574\uc11c Maven\uc744 \ucc98\uc74c \uc0ac\uc6a9\ud574\ubd24\ub2e4. Java \ud504\ub85c\uadf8\ub798\ubc0d\uc774 \uacfc\uc81c\uc600\ub294\ub370 \ub2e8\uc21c\ud788 \uc18c\uc2a4\ucf54\ub4dc\ub97c \uc81c\ucd9c\ud558\ub294 \uac83\uc774 \uc544\ub2c8\ub77c Maven \ud504\ub85c\uc81d\ud2b8\ub97c \uc81c\ucd9c\ud558\ub294 \uac83\uc774\uc5b4\uc11c \ubd80\ub7b4\ubd80\ub7b4 \uc900\ube44\ud574\uc11c \uc0ac\uc6a9\ud574\ubd24\ub2e4. \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \ud558\uba74\uc11c \ubcc4\ub3c4\uc758 IDE\ub97c \uc0ac\uc6a9\ud574\ubcf8 \uc801\uc774 \uc5c6\uc5b4\uc11c \ub9ac\ub205\uc2a4 bash<\/code>\uc640 vim<\/code> \ub9cc\uc744 \uc774\uc6a9\ud588\ub2e4.<\/p>\n

\ud504\ub85c\uc81d\ud2b8 \uc0dd\uc131 \ubc0f \uc758\uc874\uc131 \uad00\ub9ac<\/h2>\n

\ub2e4\uc74c \uba85\ub839\uc73c\ub85c \ud504\ub85c\uc81d\ud2b8\ub97c \uc0dd\uc131\ud55c\ub2e4.<\/p>\n

mvn archetype:generate \\\n-DgroupId=net.oboki.kakaobank \\\n-DartifactId=codingtest-p4 \\\n-Dpackage=net.oboki.kakaobank.recruit<\/code><\/pre>\n
\uc544\ub798 \uac12\ub4e4\uc740 \uc778\ud130\ub137\uc5d0 \ucc3e\uc544\ubcf4\ub2c8 \ub2e4\uc74c\uacfc \uac19\uc740 \uc5ed\ud560\uc744 \ud55c\ub2e4\uace0 \ud558\ub294\ub370 java \ud504\ub85c\uc81d\ud2b8\ub97c \uc81c\ub300\ub85c \ud574\ubcf8 \uc801\uc774 \uc5c6\uc5b4\uc11c \uc798\uc740 \ubaa8\ub974\uaca0\ub2e4.<\/p>\n
    \n
  • groupId\n
      \n
    • \uc0dd\uc131\ud560 \ud504\ub85c\uc81d\ud2b8 \uc2dd\ubcc4\uc744 \uc704\ud55c \uace0\uc720\ud55c \uac12<\/li>\n<\/ul>\n<\/li>\n
    • artifactId\n
        \n
      • \ube4c\ub4dc \uc774\ud6c4 \uc0dd\uc131\ub418\ub294 jar\ud30c\uc77c\uc758 \uc774\ub984<\/li>\n<\/ul>\n<\/li>\n
      • package<\/li>\n<\/ul>\n
        \ud504\ub85c\uc81d\ud2b8 \uc0dd\uc131 \uba85\ub839 \uc218\ud589 \uacb0\uacfc \uc0dd\uc131\ub418\ub294 codingtest-p4<\/code> \ub514\ub809\ud1a0\ub9ac\ub85c \uc774\ub3d9\ud574\uc11c \uc774\ud6c4\uc758 \ubaa8\ub4e0 \uc791\uc5c5\ub4e4\uc744 \uc9c4\ud589\ud55c\ub2e4.<\/p>\n
        jdbc\ub97c \uc774\uc6a9\ud574\uc11c mysql \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc5d0 \uc811\uadfc\ud560 \uac83\uc778\ub370 \uc544\ub798\uc640 \uac19\uc774 pom.xml<\/code> \ud30c\uc77c\uc5d0 \ub2e4\uc74c\uacfc \uac19\uc774 mysql jdbc \ub4dc\ub77c\uc774\ubc84\uc5d0 \ub300\ud55c \uc758\uc874\uc131\uc744 \ucd94\uac00\ud55c\ub2e4.<\/p>\n
        vi pom.xml<\/code><\/p>\n
          <dependencies>\n    <dependency>\n        <groupId>junit<\/groupId>\n        <artifactId>junit<\/artifactId>\n        <version>4.11<\/version>\n        <scope>test<\/scope>\n    <\/dependency>\n    <dependency>\n        <groupId>mysql<\/groupId> <artifactId>mysql-connector-java<\/artifactId>\n        <version>8.0.16<\/version>\n    <\/dependency>\n  <\/dependencies><\/code><\/pre>\n
        \uc544\ub798 \uba85\ub839\uc744 \uc218\ud589\ud574\uc8fc\uac8c \ub418\uba74 target\/dependency<\/code> \uacbd\ub85c\uc5d0 pom.xml<\/code>\uc5d0\uc11c \uae30\uc7ac\ud55c mysql jdbc \ub4dc\ub77c\uc774\ubc84\uac00 \ub2e4\uc6b4\ub85c\ub4dc \ub41c\ub2e4.<\/p>\n
        mvn dependency:copy-dependencies<\/code><\/pre>\n
        \ucc44\uc810\uc2dc\uc5d0 \uc5b4\ub5a4 \ubc84\uc804\uc758 \ub4dc\ub77c\uc774\ubc84\uac00 \uc0ac\uc6a9\ub418\ub294\uc9c0 \ubab0\ub77c\uc11c \ubc14\ub85c \uc2e4\ud589\ud560 \uc218 \uc788\ub3c4\ub85d \uc758\uc874\uc131\uc744 \uc804\ubd80 \ub2e4\uc6b4\ub85c\ub4dc \uc2dc\ucf30\ub2e4. \uad73\uc774 \uc548\ud574\ub3c4 \ub418\ub294 \ubd80\ubd84<\/del> \uc5b4\uca0b\ub4e0 \uc774\ub7f0\uc2dd\uc73c\ub85c \ud504\ub85c\uc81d\ud2b8\ub9c8\ub2e4 \ubc84\uc804 \uad00\ub9ac\ub97c \ud560 \uc218 \uc788\uace0 Maven repository \uc5d0\uc11c \ud3b8\ud558\uac8c \ub77c\uc774\ube0c\ub7ec\ub9ac \ub2e4\uc6b4\ub85c\ub4dc\uac00 \uac00\ub2a5\ud558\ub2e4\ub294 \uc810\uc774 maven\uc744 \uc0ac\uc6a9\ud558\ub294 \uc7a5\uc810\uc778 \uac83 \uac19\ub2e4.<\/p>\n
        \ud504\ub85c\uadf8\ub7a8 \uc791\uc131<\/h2>\n
        src\/main\/java\/net\/oboki\/kakaobank\/recruit<\/code> \uacbd\ub85c\uc5d0 java \ud504\ub85c\uadf8\ub7a8\uc744 \uc0dd\uc131\ud558\uace0 \uc791\uc131\ud55c\ub2e4. \ud574\ub2f9 \uacbd\ub85c\uc5d0 App.java<\/code> \ub77c\ub294 \ud30c\uc77c\uc774 \uc774\ubbf8 \ub9cc\ub4e4\uc5b4\uc838\uc788\ub294\ub370 \ud574\ub2f9 \ud074\ub798\uc2a4\uba85\uc73c\ub85c \uc0ac\uc6a9\ud560 \uac8c \uc544\ub2c8\uae30\ub54c\ubb38\uc5d0 \uc0ad\uc81c\ud558\uace0 \uc0c8\ub85c\uc6b4 \ubb38\uc11c\ub97c \uc5f4\uc5b4 \ucf54\ub4dc\ub97c \uc791\uc131\ud55c\ub2e4.<\/p>\n
        \uc751\uc2dc\ud588\ub358 \ucf54\ub529 \ud14c\uc2a4\ud2b8 \ubb38\uc81c \ub0b4\uc6a9\uc774 \uc720\ucd9c\ub420 \uc218 \uc788\ub294 SQL\uc774\ub098 \uc54c\uace0\ub9ac\uc998\uc740 \ubaa8\ub450 \uc81c\uac70\ud558\uace0 jdbc \ud504\ub85c\uc81d\ud2b8\uc5d0 \ud544\uc694\ud55c \ud074\ub798\uc2a4\ub4e4\uc5d0 \ub300\ud55c \ud15c\ud50c\ub9bf\ub9cc \uc791\uc131<\/del><\/p>\n
        vi src\/main\/java\/net\/oboki\/kakaobank\/recruit\/ProgName.java<\/code><\/p>\n
        package net.oboki.kakaobank.recruit;\n\nimport java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.Statement;\nimport java.sql.PreparedStatement;\nimport java.sql.ResultSet;\nimport java.sql.SQLException;\n\nimport java.io.File;\nimport java.io.FileWriter;\nimport java.io.IOException;\n\npublic class ProgName {\n\n    static String result = null;\n    static Connection conn = null;\n    static Statement stmt = null;\n    static PreparedStatement pstmt = null;\n\n    public static void main(String[] argv) {\n\n        try {\n            Class.forName("com.mysql.cj.jdbc.Driver");\n        } catch (ClassNotFoundException e) {\n            e.printStackTrace();\n            return;\n        }\n\n        try {\n            conn = DriverManager.getConnection("jdbc:mysql:\/\/localhost:3306\/DATABASE_NAME?serverTimezone=UTC", "USERNAME", "PASSWORD");\n        } catch (SQLException e) {\n            e.printStackTrace();\n            return;\n        }\n\n        try {\n            stmt = conn.createStatement();\n            String sql =  "DROP TABLE IF EXISTS TEMP_TAB";\n            stmt.executeUpdate(sql);\n            sql = "CREATE TABLE IF NOT EXISTS TEMP_TAB(";\n            sql += " TCOL1 VARCHAR(128),";\n            sql += " TCOL2 VARCHAR(128),";\n            sql += " TCOL3 DOUBLE";\n            sql += " )";\n            stmt.executeUpdate(sql);\n\n            sql = "SELECT COL1,COL2,COL3 FROM TAB";\n            pstmt = conn.prepareStatement(sql);\n            ResultSet rs = pstmt.executeQuery();\n\n            sql = "INSERT INTO TEMP_TAB VALUES(?, ?, ?)";\n            pstmt = conn.prepareStatement(sql);\n\n            while (rs.next()) {\n                String col1 = rs.getString("COL1");\n                String col2 = rs.getString("COL2");\n                Double col3 = rs.getDouble("COL3");\n\n                pstmt.setString(1,col1);\n                pstmt.setString(2,col2);\n                pstmt.setDouble(3,col3);\n\n                pstmt.addBatch();\n                pstmt.clearParameters();\n            }\n\n            pstmt.executeBatch();\n            pstmt.clearBatch();\n            \/\/conn.commit();\n\n            sql = "SELECT TCOL1,TCOL2,TCOL3 FROM TEMP_TAB";\n\n            pstmt = conn.prepareStatement(sql);\n            rs = pstmt.executeQuery();\n\n            while (rs.next()) {\n                String tcol1 = rs.getString("TCOL1");\n                String tcol2 = rs.getString("TCOL2");\n                String tcol3 = rs.getString("TCOL3");\n                result += tcol1+tcol2+tcol3+"\\n";\n            }\n\n            sql = "DROP TABLE IF EXISTS TEMP_TAB";\n            stmt.executeUpdate(sql);\n\n        } catch (SQLException e) {\n            e.printStackTrace();\n        } finally {\n            try {\n                pstmt.close();\n                stmt.close();\n                conn.close();\n            } catch (SQLException e){\n                e.printStackTrace();\n            }\n        }\n\n        FileWriter fwriter = null;\n\n        try{\n            File file = new File("output_file_name.csv");\n            fwriter = new FileWriter(file,true);\n            fwriter.write(result);\n            fwriter.flush();\n        } catch (IOException e) {\n            e.printStackTrace();\n        } finally {\n            try {\n                fwriter.close();\n            } catch (IOException e){\n                e.printStackTrace();\n            }\n        }\n    }\n}<\/code><\/pre>\n
        \ube4c\ub4dc \ubc0f \uc2e4\ud589<\/h2>\n
        \uc544\ub798 \uba85\ub839\uc73c\ub85c \ube4c\ub4dc\ud558\uace0<\/p>\n
        mvn package<\/code><\/pre>\n
        \uc544\ub798 \uba85\ub839\uc73c\ub85c \ud504\ub85c\uadf8\ub7a8\uc744 \uc2e4\ud589\ud55c\ub2e4.<\/p>\n
        java -cp target\/codingtest-p4-1.0-SNAPSHOT.jar:target\/dependency\/* net.oboki.kakaobank.recruit.ProgName<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
        [Java] Maven JDBC \ud504\ub85c\uc81d\ud2b8 \uc0dd\uc131\ud558\uae30 \uce74\uce74\uc624\ubc45\ud06c \ucf54\ub529\ud14c\uc2a4\ud2b8 \ubb38\uc81c\ub85c \ub098\uc654\ub358 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud574\uc11c Maven\uc744 \ucc98\uc74c \uc0ac\uc6a9\ud574\ubd24\ub2e4. Java \ud504\ub85c\uadf8\ub798\ubc0d\uc774 \uacfc\uc81c\uc600\ub294\ub370 \ub2e8\uc21c\ud788 \uc18c\uc2a4\ucf54\ub4dc\ub97c \uc81c\ucd9c\ud558\ub294 \uac83\uc774 \uc544\ub2c8\ub77c Maven \ud504\ub85c\uc81d\ud2b8\ub97c \uc81c\ucd9c\ud558\ub294 \uac83\uc774\uc5b4\uc11c \ubd80\ub7b4\ubd80\ub7b4 \uc900\ube44\ud574\uc11c \uc0ac\uc6a9\ud574\ubd24\ub2e4. \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \ud558\uba74\uc11c \ubcc4\ub3c4\uc758 IDE\ub97c \uc0ac\uc6a9\ud574\ubcf8 \uc801\uc774 \uc5c6\uc5b4\uc11c \ub9ac\ub205\uc2a4 bash\uc640 vim \ub9cc\uc744 \uc774\uc6a9\ud588\ub2e4. \ud504\ub85c\uc81d\ud2b8 \uc0dd\uc131 \ubc0f \uc758\uc874\uc131 \uad00\ub9ac \ub2e4\uc74c \uba85\ub839\uc73c\ub85c \ud504\ub85c\uc81d\ud2b8\ub97c \uc0dd\uc131\ud55c\ub2e4. mvn archetype:generate \\ -DgroupId=net.oboki.kakaobank […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-1102","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/oboki.net\/workspace\/wp-json\/wp\/v2\/posts\/1102","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oboki.net\/workspace\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/oboki.net\/workspace\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/oboki.net\/workspace\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oboki.net\/workspace\/wp-json\/wp\/v2\/comments?post=1102"}],"version-history":[{"count":3,"href":"https:\/\/oboki.net\/workspace\/wp-json\/wp\/v2\/posts\/1102\/revisions"}],"predecessor-version":[{"id":1161,"href":"https:\/\/oboki.net\/workspace\/wp-json\/wp\/v2\/posts\/1102\/revisions\/1161"}],"wp:attachment":[{"href":"https:\/\/oboki.net\/workspace\/wp-json\/wp\/v2\/media?parent=1102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oboki.net\/workspace\/wp-json\/wp\/v2\/categories?post=1102"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oboki.net\/workspace\/wp-json\/wp\/v2\/tags?post=1102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}