模板引擎支持字符串模板渲染输出字符串内容

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/config/TemplateLoadWay.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2011-2024, baomidou (jobob@qq.com).
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.baomidou.mybatisplus.generator.config;
+
+import lombok.Getter;
+
+/**
+ * 模板文件加载方式
+ *
+ * @author hubin
+ * @since 3.5.9
+ */
+@Getter
+public enum TemplateLoadWay {
+    STRING("string"),
+    FILE("file");
+
+    private final String value;
+
+    TemplateLoadWay(String value) {
+        this.value = value;
+    }
+
+    public boolean isFile() {
+        return FILE == this;
+    }
+}

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/config/builder/ConfigBuilder.java

@@ -18,6 +18,8 @@ package com.baomidou.mybatisplus.generator.config.builder;
 import com.baomidou.mybatisplus.generator.config.*;
 import com.baomidou.mybatisplus.generator.config.po.TableInfo;
 import com.baomidou.mybatisplus.generator.query.IDatabaseQuery;
+import lombok.Getter;
+import lombok.Setter;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -87,6 +89,14 @@ public class ConfigBuilder {
      */
     private final IDatabaseQuery databaseQuery;
 
+    /**
+     * 资源加载器
+     * @since 3.5.9
+     */
+    @Getter
+    @Setter
+    private TemplateLoadWay templateLoadWay = TemplateLoadWay.FILE;
+
     /**
      * 在构造器中处理配置
      *

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/config/querys/DbQueryDecorator.java

@@ -23,6 +23,7 @@ import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
 import com.baomidou.mybatisplus.generator.config.IDbQuery;
 import com.baomidou.mybatisplus.generator.config.StrategyConfig;
 import com.baomidou.mybatisplus.generator.config.po.LikeTable;
+import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -47,6 +48,7 @@ import java.util.stream.Collectors;
  */
 public class DbQueryDecorator extends AbstractDbQuery {
     private final IDbQuery dbQuery;
+    @Getter
     private final Connection connection;
     private final DbType dbType;
     private final StrategyConfig strategyConfig;
@@ -190,7 +192,6 @@ public class DbQueryDecorator extends AbstractDbQuery {
      *
      * @param sql      执行SQL
      * @param consumer 结果处理
-     * @throws SQLException
      */
     public void execute(String sql, Consumer<ResultSetWrapper> consumer) throws SQLException {
         logger.debug("执行SQL:{}", sql);
@@ -207,10 +208,6 @@ public class DbQueryDecorator extends AbstractDbQuery {
         }
     }
 
-    public Connection getConnection() {
-        return connection;
-    }
-
     public void closeConnection() {
         Optional.ofNullable(connection).ifPresent((con) -> {
             try {
@@ -225,6 +222,7 @@ public class DbQueryDecorator extends AbstractDbQuery {
 
         private final IDbQuery dbQuery;
 
+        @Getter
         private final ResultSet resultSet;
 
         private final DbType dbType;
@@ -235,10 +233,6 @@ public class DbQueryDecorator extends AbstractDbQuery {
             this.dbType = dbType;
         }
 
-        public ResultSet getResultSet() {
-            return resultSet;
-        }
-
         public String getStringResult(String columnLabel) {
             try {
                 return resultSet.getString(columnLabel);

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/config/querys/DbQueryRegistry.java

@@ -22,8 +22,9 @@ import java.util.EnumMap;
 import java.util.Map;
 
 /**
+ * 数据库查询接口注册中心
+ *
  * @author nieqiuqiu
- * @date 2020-01-09
  * @since 3.3.1
  */
 public class DbQueryRegistry {

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/config/querys/GbaseQuery.java

@@ -17,7 +17,7 @@ package com.baomidou.mybatisplus.generator.config.querys;
 
 
 /**
- * https://github.com/baomidou/generator/pull/83
+ * <a href="https://github.com/baomidou/generator/pull/83">Gbase</a>
  *
  * @author lix
  */

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/engine/AbstractTemplateEngine.java

@@ -18,12 +18,7 @@ package com.baomidou.mybatisplus.generator.engine;
 import com.baomidou.mybatisplus.core.toolkit.StringPool;
 import com.baomidou.mybatisplus.core.toolkit.StringUtils;
 import com.baomidou.mybatisplus.generator.config.*;
-import com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder;
-import com.baomidou.mybatisplus.generator.config.builder.Controller;
-import com.baomidou.mybatisplus.generator.config.builder.CustomFile;
-import com.baomidou.mybatisplus.generator.config.builder.Entity;
-import com.baomidou.mybatisplus.generator.config.builder.Mapper;
-import com.baomidou.mybatisplus.generator.config.builder.Service;
+import com.baomidou.mybatisplus.generator.config.builder.*;
 import com.baomidou.mybatisplus.generator.config.po.TableInfo;
 import com.baomidou.mybatisplus.generator.util.FileUtils;
 import com.baomidou.mybatisplus.generator.util.RuntimeUtils;
@@ -259,6 +254,16 @@ public abstract class AbstractTemplateEngine {
         return this;
     }
 
+    /**
+     * 将模板转化成为字符串
+     *
+     * @param objectMap      渲染对象 MAP 信息
+     * @param templateName   模板名称
+     * @param templateString 模板字符串
+     * @since 3.5.0
+     */
+    public abstract String writer(@NotNull Map<String, Object> objectMap, @NotNull String templateName, @NotNull String templateString) throws Exception;
+
     /**
      * 将模板转化成为文件
      *

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/engine/BeetlTemplateEngine.java

@@ -65,6 +65,13 @@ public class BeetlTemplateEngine extends AbstractTemplateEngine {
         return this;
     }
 
+    @Override
+    public String writer(@NotNull Map<String, Object> objectMap, @NotNull String templateName, @NotNull String templateString) throws Exception {
+        Template template = groupTemplate.getTemplate(templateString);
+        template.binding(objectMap);
+        return template.render();
+    }
+
     @Override
     public void writer(@NotNull Map<String, Object> objectMap, @NotNull String templatePath, @NotNull File outputFile) throws Exception {
         Template template = (Template) method.invoke(groupTemplate, templatePath);

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/engine/EnjoyTemplateEngine.java

@@ -18,6 +18,7 @@ package com.baomidou.mybatisplus.generator.engine;
 import com.baomidou.mybatisplus.generator.config.ConstVal;
 import com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder;
 import com.jfinal.template.Engine;
+import com.jfinal.template.Template;
 import org.jetbrains.annotations.NotNull;
 
 import java.io.BufferedWriter;
@@ -38,12 +39,17 @@ public class EnjoyTemplateEngine extends AbstractTemplateEngine {
 
     @Override
     public @NotNull AbstractTemplateEngine init(@NotNull ConfigBuilder configBuilder) {
-        engine = Engine.createIfAbsent("mybatis-plus-generator", e -> {
-            e.setToClassPathSourceFactory();
-        });
+        engine = Engine.createIfAbsent("mybatis-plus-generator",
+            Engine::setToClassPathSourceFactory);
         return this;
     }
 
+    @Override
+    public String writer(@NotNull Map<String, Object> objectMap, @NotNull String templateName, @NotNull String templateString) throws Exception {
+        Template template = engine.getTemplate(templateString);
+        return template.renderToString(objectMap);
+    }
+
     @Override
     public void writer(@NotNull Map<String, Object> objectMap, @NotNull String templatePath, @NotNull File outputFile) throws Exception {
         String str = engine.getTemplate(templatePath).renderToString(objectMap);

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/engine/FreemarkerTemplateEngine.java

@@ -25,6 +25,7 @@ import org.jetbrains.annotations.NotNull;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.OutputStreamWriter;
+import java.io.StringWriter;
 import java.util.Map;
 
 /**
@@ -44,6 +45,13 @@ public class FreemarkerTemplateEngine extends AbstractTemplateEngine {
         return this;
     }
 
+    @Override
+    public String writer(@NotNull Map<String, Object> objectMap, @NotNull String templateName, @NotNull String templateString) throws Exception {
+        Template template = new Template(templateName, templateString, configuration);
+        StringWriter writer = new StringWriter();
+        template.process(objectMap, writer);
+        return writer.toString();
+    }
 
     @Override
     public void writer(@NotNull Map<String, Object> objectMap, @NotNull String templatePath, @NotNull File outputFile) throws Exception {

mybatis-plus-generator/src/main/java/com/baomidou/mybatisplus/generator/engine/VelocityTemplateEngine.java

@@ -17,6 +17,7 @@ package com.baomidou.mybatisplus.generator.engine;
 
 import com.baomidou.mybatisplus.core.toolkit.StringPool;
 import com.baomidou.mybatisplus.generator.config.ConstVal;
+import com.baomidou.mybatisplus.generator.config.TemplateLoadWay;
 import com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder;
 import org.apache.velocity.Template;
 import org.apache.velocity.VelocityContext;
@@ -24,10 +25,7 @@ import org.apache.velocity.app.Velocity;
 import org.apache.velocity.app.VelocityEngine;
 import org.jetbrains.annotations.NotNull;
 
-import java.io.BufferedWriter;
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.OutputStreamWriter;
+import java.io.*;
 import java.util.Map;
 import java.util.Properties;
 
@@ -53,16 +51,28 @@ public class VelocityTemplateEngine extends AbstractTemplateEngine {
     public @NotNull VelocityTemplateEngine init(@NotNull ConfigBuilder configBuilder) {
         if (null == velocityEngine) {
             Properties p = new Properties();
-            p.setProperty(ConstVal.VM_LOAD_PATH_KEY, ConstVal.VM_LOAD_PATH_VALUE);
-            p.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH, StringPool.EMPTY);
             p.setProperty(Velocity.ENCODING_DEFAULT, ConstVal.UTF8);
             p.setProperty(Velocity.INPUT_ENCODING, ConstVal.UTF8);
-            p.setProperty("file.resource.loader.unicode", StringPool.TRUE);
+            if (configBuilder.getTemplateLoadWay().isFile()) {
+                // 文件模板
+                p.setProperty(ConstVal.VM_LOAD_PATH_KEY, ConstVal.VM_LOAD_PATH_VALUE);
+                p.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH, StringPool.EMPTY);
+                p.setProperty("file.resource.loader.unicode", StringPool.TRUE);
+            } else {
+                // 文本模板
+                p.setProperty(Velocity.RESOURCE_LOADER, TemplateLoadWay.STRING.getValue());
+            }
             velocityEngine = new VelocityEngine(p);
         }
         return this;
     }
 
+    @Override
+    public String writer(@NotNull Map<String, Object> objectMap, @NotNull String templateName, @NotNull String templateString) throws Exception {
+        StringWriter writer = new StringWriter();
+        velocityEngine.evaluate(new VelocityContext(objectMap), writer, templateName, templateString);
+        return writer.toString();
+    }
 
     @Override
     public void writer(@NotNull Map<String, Object> objectMap, @NotNull String templatePath, @NotNull File outputFile) throws Exception {