From ba180921f92b488bf8dff34a1ff43030b19f33ef Mon Sep 17 00:00:00 2001 From: Bo Ding Date: Sat, 26 Mar 2022 16:17:33 +0800 Subject: [PATCH] add java insert example (#11019) * java insert example * sql upper case * java stmt example * java stmt exmaple --- docs-cn/06-insert-data/01-sql-writing.mdx | 4 +- docs-cn/06-insert-data/_java_sql.mdx | 3 + docs-cn/06-insert-data/_java_stmt.mdx | 3 + .../com/taos/example/RestInsertExample.java | 74 ++++++++++++++++ .../com/taos/example/RestInsertExmaple.java | 4 - .../com/taos/example/StmtInsertExample.java | 86 +++++++++++++++++++ 6 files changed, 168 insertions(+), 6 deletions(-) create mode 100644 docs-examples/java/src/main/java/com/taos/example/RestInsertExample.java delete mode 100644 docs-examples/java/src/main/java/com/taos/example/RestInsertExmaple.java create mode 100644 docs-examples/java/src/main/java/com/taos/example/StmtInsertExample.java diff --git a/docs-cn/06-insert-data/01-sql-writing.mdx b/docs-cn/06-insert-data/01-sql-writing.mdx index 1195b0c2a4..16616487bc 100644 --- a/docs-cn/06-insert-data/01-sql-writing.mdx +++ b/docs-cn/06-insert-data/01-sql-writing.mdx @@ -84,7 +84,7 @@ INSERT INTO d1001 VALUES (1538548685000, 10.3, 219, 0.31) (1538548695000, 12.6, :::note 1. 无论 RESTFful 方式建立连接还是本地驱动方式建立连接，以上示例代码都能正常工作。 -2. 唯一需要注意的是：由于 RESTful 接口无状态， 不能使用 `use db` 语句来切换数据库。 +2. 唯一需要注意的是：由于 RESTful 接口无状态， 不能使用 `use db` 语句来切换数据库, 所以在上面示例中使用了`dbName.tbName`指定表名。 ::: @@ -120,4 +120,4 @@ TDengine 也提供了支持参数绑定的 Prepare API，与 MySQL 一样，这 只有使用本地驱动方式连接连接，才能使用动态绑定工具。 -::: \ No newline at end of file +::: diff --git a/docs-cn/06-insert-data/_java_sql.mdx b/docs-cn/06-insert-data/_java_sql.mdx index e69de29bb2..a863378def 100644 --- a/docs-cn/06-insert-data/_java_sql.mdx +++ b/docs-cn/06-insert-data/_java_sql.mdx @@ -0,0 +1,3 @@ +```java +{{#include docs-examples/java/src/main/java/com/taos/example/RestInsertExample.java:insert}} +``` \ No newline at end of file diff --git a/docs-cn/06-insert-data/_java_stmt.mdx b/docs-cn/06-insert-data/_java_stmt.mdx index e69de29bb2..9f3e7a4466 100644 --- a/docs-cn/06-insert-data/_java_stmt.mdx +++ b/docs-cn/06-insert-data/_java_stmt.mdx @@ -0,0 +1,3 @@ +```java +{{#include docs-examples/java/src/main/java/com/taos/example/StmtInsertExample.java:insert}} +``` diff --git a/docs-examples/java/src/main/java/com/taos/example/RestInsertExample.java b/docs-examples/java/src/main/java/com/taos/example/RestInsertExample.java new file mode 100644 index 0000000000..1dfd548544 --- /dev/null +++ b/docs-examples/java/src/main/java/com/taos/example/RestInsertExample.java @@ -0,0 +1,74 @@ +package com.taos.example; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.SQLException; +import java.sql.Statement; +import java.util.Arrays; +import java.util.List; + + +public class RestInsertExample { + private static Connection getConnection() throws SQLException { + String jdbcUrl = "jdbc:TAOS-RS://localhost:6041?user=root&password=taosdata"; + return DriverManager.getConnection(jdbcUrl); + } + + private static List getRawData() { + return Arrays.asList( + "d1001,2018-10-03 14:38:05.000,10.30000,219,0.31000,Beijing.Chaoyang,2", + "d1001,2018-10-03 14:38:15.000,12.60000,218,0.33000,Beijing.Chaoyang,2", + "d1001,2018-10-03 14:38:16.800,12.30000,221,0.31000,Beijing.Chaoyang,2", + "d1002,2018-10-03 14:38:16.650,10.30000,218,0.25000,Beijing.Chaoyang,3", + "d1003,2018-10-03 14:38:05.500,11.80000,221,0.28000,Beijing.Haidian,2", + "d1003,2018-10-03 14:38:16.600,13.40000,223,0.29000,Beijing.Haidian,2", + "d1004,2018-10-03 14:38:05.000,10.80000,223,0.29000,Beijing.Haidian,3", + "d1004,2018-10-03 14:38:06.500,11.50000,221,0.35000,Beijing.Haidian,3" + ); + } + + + /** + * The generated SQL is: + * INSERT INTO power.d1001 USING power.meters TAGS(Beijing.Chaoyang, 2) VALUES('2018-10-03 14:38:05.000',10.30000,219,0.31000) + * power.d1001 USING power.meters TAGS(Beijing.Chaoyang, 2) VALUES('2018-10-03 14:38:15.000',12.60000,218,0.33000) + * power.d1001 USING power.meters TAGS(Beijing.Chaoyang, 2) VALUES('2018-10-03 14:38:16.800',12.30000,221,0.31000) + * power.d1002 USING power.meters TAGS(Beijing.Chaoyang, 3) VALUES('2018-10-03 14:38:16.650',10.30000,218,0.25000) + * power.d1003 USING power.meters TAGS(Beijing.Haidian, 2) VALUES('2018-10-03 14:38:05.500',11.80000,221,0.28000) + * power.d1003 USING power.meters TAGS(Beijing.Haidian, 2) VALUES('2018-10-03 14:38:16.600',13.40000,223,0.29000) + * power.d1004 USING power.meters TAGS(Beijing.Haidian, 3) VALUES('2018-10-03 14:38:05.000',10.80000,223,0.29000) + * power.d1004 USING power.meters TAGS(Beijing.Haidian, 3) VALUES('2018-10-03 14:38:06.500',11.50000,221,0.35000) + */ + private static String getSQL() { + StringBuilder sb = new StringBuilder("INSERT INTO "); + for (String line : getRawData()) { + String[] fields = line.split(","); + sb.append("power." + fields[0]).append(" USING power.meters TAGS(") + .append(fields[5]).append(", ") + .append(fields[6]) + .append(") VALUES(") + .append('\'').append(fields[1]).append('\'').append(",") + .append(fields[2]).append(",") + .append(fields[3]).append(",") + .append(fields[4]).append(") "); + } + return sb.toString(); + } + + public static void insertData() throws SQLException { + try(Connection conn = getConnection()) { + try (Statement stmt = conn.createStatement()) { + stmt.execute("CREATE DATABASE power KEEP 3650"); + stmt.execute("CREATE STABLE power.meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) " + + "TAGS (location BINARY(64), groupId INT)"); + String sql = getSQL(); + int rowCount = stmt.executeUpdate(sql); + System.out.println("rowCount=" + rowCount); // rowCount=8 + } + } + } + + public static void main(String[] args) throws SQLException { + insertData(); + } +} diff --git a/docs-examples/java/src/main/java/com/taos/example/RestInsertExmaple.java b/docs-examples/java/src/main/java/com/taos/example/RestInsertExmaple.java deleted file mode 100644 index 4d18c034a8..0000000000 --- a/docs-examples/java/src/main/java/com/taos/example/RestInsertExmaple.java +++ /dev/null @@ -1,4 +0,0 @@ -package com.taos.example; - -public class RestInsertExmaple { -} diff --git a/docs-examples/java/src/main/java/com/taos/example/StmtInsertExample.java b/docs-examples/java/src/main/java/com/taos/example/StmtInsertExample.java new file mode 100644 index 0000000000..2e89e9290a --- /dev/null +++ b/docs-examples/java/src/main/java/com/taos/example/StmtInsertExample.java @@ -0,0 +1,86 @@ +package com.taos.example; + +import com.taosdata.jdbc.TSDBPreparedStatement; + +import java.sql.Connection; +import java.sql.DriverManager; +import java.sql.SQLException; +import java.sql.Statement; +import java.time.LocalDateTime; +import java.time.ZoneOffset; +import java.time.format.DateTimeFormatter; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; + +public class StmtInsertExample { + private static Connection getConnection() throws SQLException { + String jdbcUrl = "jdbc:TAOS://localhost:6030?user=root&password=taosdata"; + return DriverManager.getConnection(jdbcUrl); + } + + private static List getRawData() { + return Arrays.asList( + "d1001,2018-10-03 14:38:05.000,10.30000,219,0.31000,Beijing.Chaoyang,2", + "d1001,2018-10-03 14:38:15.000,12.60000,218,0.33000,Beijing.Chaoyang,2", + "d1001,2018-10-03 14:38:16.800,12.30000,221,0.31000,Beijing.Chaoyang,2", + "d1002,2018-10-03 14:38:16.650,10.30000,218,0.25000,Beijing.Chaoyang,3", + "d1003,2018-10-03 14:38:05.500,11.80000,221,0.28000,Beijing.Haidian,2", + "d1003,2018-10-03 14:38:16.600,13.40000,223,0.29000,Beijing.Haidian,2", + "d1004,2018-10-03 14:38:05.000,10.80000,223,0.29000,Beijing.Haidian,3", + "d1004,2018-10-03 14:38:06.500,11.50000,221,0.35000,Beijing.Haidian,3" + ); + } + + private static ArrayList tsToLongArray(String ts) { + ArrayList result = new ArrayList<>(); + DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS"); + LocalDateTime localDateTime = LocalDateTime.parse(ts, formatter); + result.add(localDateTime.toInstant(ZoneOffset.of("+8")).toEpochMilli()); + return result; + } + + private static ArrayList toArray(T v) { + ArrayList result = new ArrayList<>(); + result.add(v); + return result; + } + + // ANCHOR: insert + private static void createTable(Connection conn) throws SQLException { + try (Statement stmt = conn.createStatement()) { + stmt.execute("CREATE DATABASE power KEEP 3650"); + stmt.executeUpdate("USE power"); + stmt.execute("CREATE STABLE meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) " + + "TAGS (location BINARY(64), groupId INT)"); + } + } + + private static void insertData() throws SQLException { + try (Connection conn = getConnection()) { + createTable(conn); + String psql = "INSERT INTO ? USING meters TAGS(?, ?) VALUES(?, ?, ?, ?)"; + try (TSDBPreparedStatement pst = (TSDBPreparedStatement) conn.prepareStatement(psql)) { + for (String line : getRawData()) { + String[] ps = line.split(","); + // bind table name and tags + pst.setTableName(ps[0]); + pst.setTagString(0, ps[5]); + pst.setTagInt(1, Integer.valueOf(ps[6])); + // bind values + pst.setTimestamp(0, tsToLongArray(ps[1])); + pst.setFloat(1, toArray(Float.valueOf(ps[2]))); + pst.setInt(2, toArray(Integer.valueOf(ps[3]))); + pst.setFloat(3, toArray(Float.valueOf(ps[4]))); + pst.columnDataAddBatch(); + } + pst.columnDataExecuteBatch(); + } + } + } + // ANCHOR_END: insert + + public static void main(String[] args) throws SQLException { + insertData(); + } +} -- GitLab