重构 SQL 构建器。

src/main/java/xyz/zhouxy/plusone/commons/jdbc/JdbcSql.java

@@ -8,6 +8,10 @@ public class JdbcSql extends SQL<JdbcSql> {
         super();
     }
 
+    public static JdbcSql newSql() {
+        return new JdbcSql();
+    }
+
     @Override
     public JdbcSql getSelf() {
         return this;

src/main/java/xyz/zhouxy/plusone/commons/jdbc/MyBatisSql.java

@@ -0,0 +1,65 @@
+package xyz.zhouxy.plusone.commons.jdbc;
+
+import com.google.common.annotations.Beta;
+
+@Beta
+public class MyBatisSql extends SQL<MyBatisSql> {
+
+    private final boolean withScript;
+
+    MyBatisSql(boolean withScript) {
+        super();
+        this.withScript = withScript;
+    }
+
+    public static MyBatisSql newSql() {
+        return new MyBatisSql(false);
+    }
+
+    public static MyBatisSql newScriptSql() {
+        return new MyBatisSql(true);
+    }
+
+    @Override
+    public MyBatisSql getSelf() {
+        return this;
+    }
+
+    public static String IN(String col, String paramName) {
+        return new StringBuilder(" ")
+                .append(col)
+                .append(" IN")
+                .append(buildQuestionsList(col, paramName))
+                .toString();
+    }
+
+    public static String NOT_IN(String col, String paramName) {
+        return new StringBuilder()
+                .append(col)
+                .append(" NOT IN")
+                .append(buildQuestionsList(col, paramName))
+                .toString();
+    }
+
+    private static String buildQuestionsList(String col, String paramName) {
+        return new StringBuilder()
+                .append("<foreach item=\"")
+                .append(col)
+                .append("\" index=\"index\" collection=\"")
+                .append(paramName)
+                .append("\" open=\"(\" separator=\",\" close=\")\">")
+                .append("#{")
+                .append(col)
+                .append("}</foreach>")
+                .toString();
+    }
+
+    @Override
+    public String toString() {
+        String str = super.toString();
+        if (withScript) {
+            str = "<script>\n" + str + "\n</script>";
+        }
+        return str;
+    }
+}

src/main/java/xyz/zhouxy/plusone/commons/jdbc/SQL.java

@@ -30,10 +30,18 @@ public abstract class SQL<T> extends AbstractSQL<T> {
         return new JdbcSql();
     }
 
-    public T WHERE(boolean condition, String sqlConditions) {
+    public static MyBatisSql newMyBatisSql(boolean withScript) {
+        return new MyBatisSql(withScript);
+    }
+
+    public T WHERE(boolean condition, String sqlCondition) {
         if (condition) {
-            return WHERE(sqlConditions);
+            return WHERE(sqlCondition);
         }
         return getSelf();
     }
+
+    public T WHERE(boolean condition, String ifSqlCondition, String elseSqlCondition) {
+        return WHERE(condition ? ifSqlCondition : elseSqlCondition);
+    }
 }

src/main/java/xyz/zhouxy/plusone/commons/util/MoreArrays.java

@@ -1,29 +0,0 @@
-package xyz.zhouxy.plusone.commons.util;
-
-import java.util.Arrays;
-
-import com.google.common.annotations.Beta;
-
-@Beta
-public class MoreArrays {
-
-    public static Object[] asObjectArray(final Object... objects) {
-        return objects;
-    }
-
-    public static char[] newCharArrayWith(int length, char c) {
-        char[] arr = new char[length];
-        Arrays.fill(arr, c);
-        return arr;
-    }
-
-    public static String[] newStringArrayWith(int length, String c) {
-        String[] arr = new String[length];
-        Arrays.fill(arr, c);
-        return arr;
-    }
-
-    private MoreArrays() {
-        throw new IllegalStateException("Utility class");
-    }
-}

src/test/java/xyz/zhouxy/plusone/commons/util/MoreArraysTests.java

@@ -1,20 +0,0 @@
-package xyz.zhouxy.plusone.commons.util;
-
-import java.util.Arrays;
-import java.util.Date;
-
-import org.junit.jupiter.api.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-class MoreArraysTests {
-
-    private static final Logger log = LoggerFactory.getLogger(MoreArraysTests.class);
-
-    @Test
-    void testAsObjectArray() {
-        Object[] arr = MoreArrays.asObjectArray("1", "2", 1, 2, new Date());
-        log.info("arr: {}", arr.toString());
-        log.info("arr: {}", Arrays.toString(arr));
-    }
-}

src/test/java/xyz/zhouxy/plusone/commons/util/MyBatisSqlBuilderTests.java

@@ -0,0 +1,23 @@
+package xyz.zhouxy.plusone.commons.util;
+
+import static xyz.zhouxy.plusone.commons.jdbc.MyBatisSql.IN;
+
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import xyz.zhouxy.plusone.commons.jdbc.MyBatisSql;
+
+class MyBatisSqlBuilderTests {
+    private static final Logger log = LoggerFactory.getLogger(MyBatisSqlBuilderTests.class);
+
+    @Test
+    void test() {
+        // List<String> ids = Arrays.asList("2333", "4501477");
+        MyBatisSql sql = MyBatisSql.newScriptSql()
+                .SELECT("*")
+                .FROM("test_table")
+                .WHERE(IN("id", "ids"));
+        log.info("sql: {}", sql);
+    }
+}