mysql + postgres upsert完成并测试通过

hutool-db/src/main/java/cn/hutool/db/dialect/impl/MysqlDialect.java

@@ -1,10 +1,16 @@
 package cn.hutool.db.dialect.impl;
 
+import cn.hutool.db.Entity;
 import cn.hutool.db.Page;
+import cn.hutool.db.StatementUtil;
 import cn.hutool.db.dialect.DialectName;
 import cn.hutool.db.sql.SqlBuilder;
 import cn.hutool.db.sql.Wrapper;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+
 /**
  * MySQL方言
  * @author loolly
@@ -26,4 +32,19 @@ public class MysqlDialect extends AnsiSqlDialect{
 	public String dialectName() {
 		return DialectName.MYSQL.toString();
 	}
+
+	/**
+	 * 构建用于upsert的PreparedStatement
+	 *
+	 * @param conn   数据库连接对象
+	 * @param entity 数据实体类（包含表名）
+	 * @param keys   查找字段
+	 * @return PreparedStatement
+	 * @throws SQLException SQL执行异常
+	 */
+	@Override
+	public PreparedStatement psForUpsert(Connection conn, Entity entity, String... keys) throws SQLException {
+		final SqlBuilder upsert = SqlBuilder.create(wrapper).upsert(entity, this.dialectName(),keys);
+		return StatementUtil.prepareStatement(conn, upsert);
+	}
 }

hutool-db/src/main/java/cn/hutool/db/dialect/impl/PostgresqlDialect.java

@@ -1,8 +1,15 @@
 package cn.hutool.db.dialect.impl;
 
+import cn.hutool.db.Entity;
+import cn.hutool.db.StatementUtil;
 import cn.hutool.db.dialect.DialectName;
+import cn.hutool.db.sql.SqlBuilder;
 import cn.hutool.db.sql.Wrapper;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+
 
 /**
  * Postgree方言
@@ -20,4 +27,22 @@ public class PostgresqlDialect extends AnsiSqlDialect{
 	public String dialectName() {
 		return DialectName.POSTGREESQL.name();
 	}
+
+	/**
+	 * 构建用于upsert的PreparedStatement
+	 *
+	 * @param conn   数据库连接对象
+	 * @param entity 数据实体类（包含表名）
+	 * @param keys   查找字段 必须是有唯一索引的列且不能为空
+	 * @return PreparedStatement
+	 * @throws SQLException SQL执行异常
+	 */
+	@Override
+	public PreparedStatement psForUpsert(Connection conn, Entity entity, String... keys) throws SQLException {
+		if (null==keys || keys.length==0){
+			throw new SQLException("keys不能为空");
+		}
+		final SqlBuilder upsert = SqlBuilder.create(wrapper).upsert(entity, this.dialectName(),keys);
+		return StatementUtil.prepareStatement(conn, upsert);
+	}
 }

hutool-db/src/main/java/cn/hutool/db/sql/SqlBuilder.java

@@ -249,6 +249,12 @@ public class SqlBuilder implements Builder<String> {
 		// issue#1656@Github Phoenix兼容
 		if (DialectName.PHOENIX.match(dialectName)) {
 			sql.append("UPSERT INTO ").append(entity.getTableName());
+		} else if (DialectName.MYSQL.match(dialectName)) {
+			sql.append("INSERT INTO ");
+			sql.append(entity.getTableName())
+					.append(" (").append(fieldsPart).append(") VALUES (")
+					.append(placeHolder).append(") on duplicate key update ")
+					.append(ArrayUtil.join(ArrayUtil.map(entity.keySet().toArray(), String.class, (k) -> k + "=values(" + k + ")"), ","));
 		} else if (DialectName.H2.match(dialectName)) {
 			sql.append("MERGE INTO ").append(entity.getTableName());
 			if (null != keys && keys.length > 0) {
@@ -257,6 +263,14 @@ public class SqlBuilder implements Builder<String> {
 						.append(placeHolder)
 						.append(")");
 			}
+		} else if (DialectName.POSTGREESQL.match(dialectName)) {
+			sql.append("INSERT INTO ");
+			sql.append(entity.getTableName())
+					.append(" (").append(fieldsPart).append(") VALUES (")
+					.append(placeHolder).append(") on conflict (")
+					.append(ArrayUtil.join(keys,","))
+					.append(") do update set ")
+					.append(ArrayUtil.join(ArrayUtil.map(entity.keySet().toArray(), String.class, (k) -> k + "=excluded." + k ), ","));
 		} else {
 			throw new RuntimeException(dialectName + " not support yet");
 		}

hutool-db/src/test/java/cn/hutool/db/MySQLTest.java

@@ -1,6 +1,9 @@
 package cn.hutool.db;
 
 import cn.hutool.core.lang.Console;
+import cn.hutool.core.util.ArrayUtil;
+import org.junit.Assert;
+import org.junit.BeforeClass;
 import org.junit.Ignore;
 import org.junit.Test;
 
@@ -11,9 +14,14 @@ import java.util.List;
  * MySQL操作单元测试
  *
  * @author looly
- *
  */
 public class MySQLTest {
+	@BeforeClass
+	@Ignore
+	public static void createTable() throws SQLException {
+		Db db = Db.use("mysql");
+		db.executeBatch("drop table if exists testuser", "CREATE TABLE if not exists `testuser` ( `id` int(11) NOT NULL, `account` varchar(255) DEFAULT NULL, `pass` varchar(255) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8");
+	}
 
 	@Test
 	@Ignore
@@ -34,13 +42,13 @@ public class MySQLTest {
 	 *
 	 * @throws SQLException SQL异常
 	 */
-	@Test(expected=SQLException.class)
+	@Test(expected = SQLException.class)
 	@Ignore
 	public void txTest() throws SQLException {
 		Db.use("mysql").tx(db -> {
 			int update = db.update(Entity.create("user").set("text", "描述100"), Entity.create().set("id", 100));
 			db.update(Entity.create("user").set("text", "描述101"), Entity.create().set("id", 101));
-			if(1 == update) {
+			if (1 == update) {
 				// 手动指定异常，然后测试回滚触发
 				throw new RuntimeException("Error");
 			}
@@ -64,4 +72,14 @@ public class MySQLTest {
 		Console.log(all);
 	}
 
+	@Test
+	@Ignore
+	public void upsertTest() throws SQLException {
+		Db db = Db.use("mysql");
+		db.insert(Entity.create("testuser").set("id", 1).set("account", "ice").set("pass", "123456"));
+		db.upsert(Entity.create("testuser").set("id", 1).set("account", "icefairy").set("pass", "a123456"));
+		Entity user = db.get(Entity.create("testuser").set("id", 1));
+		System.out.println("user======="+user.getStr("account")+"___"+user.getStr("pass"));
+		Assert.assertEquals(user.getStr("account"), new String("icefairy"));
+	}
 }

hutool-db/src/test/java/cn/hutool/db/PostgreTest.java

@@ -2,6 +2,7 @@ package cn.hutool.db;
 
 import java.sql.SQLException;
 
+import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;
 
@@ -11,7 +12,6 @@ import cn.hutool.core.lang.Console;
  * PostgreSQL 单元测试
  *
  * @author looly
- *
  */
 public class PostgreTest {
 
@@ -34,4 +34,16 @@ public class PostgreTest {
 			Console.log(entity.get("id"));
 		}
 	}
+
+	@Test
+	@Ignore
+	public void upsertTest() throws SQLException {
+		Db db = Db.use("postgre");
+		db.executeBatch("drop table if exists ctest",
+				"create table if not exists \"ctest\" ( \"id\" serial4, \"t1\" varchar(255) COLLATE \"pg_catalog\".\"default\", \"t2\" varchar(255) COLLATE \"pg_catalog\".\"default\", \"t3\" varchar(255) COLLATE \"pg_catalog\".\"default\", CONSTRAINT \"ctest_pkey\" PRIMARY KEY (\"id\") )  ");
+		db.insert(Entity.create("ctest").set("id", 1).set("t1", "111").set("t2", "222").set("t3", "333"));
+		db.upsert(Entity.create("ctest").set("id", 1).set("t1", "new111").set("t2", "new222").set("t3", "bew333"),"id");
+		Entity et=db.get(Entity.create("ctest").set("id", 1));
+		Assert.assertEquals("new111",et.getStr("t1"));
+	}
 }