add ConditionBuilder

hutool-db/src/test/java/cn/hutool/db/sql/ConditionBuilderTest.java

@@ -0,0 +1,21 @@
+package cn.hutool.db.sql;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class ConditionBuilderTest {
+
+	@Test
+	public void buildTest(){
+		Condition c1 = new Condition("user", null);
+		Condition c2 = new Condition("name", "!= null");
+		c2.setLinkOperator(LogicalOperator.OR);
+		Condition c3 = new Condition("group", "like %aaa");
+
+		final ConditionBuilder builder = ConditionBuilder.of(c1, c2, c3);
+		final String sql = builder.build();
+		Assert.assertEquals("user IS NULL OR name IS NOT NULL AND group LIKE ?", sql);
+		Assert.assertEquals(1, builder.getParamValues().size());
+		Assert.assertEquals("%aaa", builder.getParamValues().get(0));
+	}
+}