com.baomidou.mybatisplus.generator.engine.VelocityTemplateEngine Maven / Gradle / Ivy
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/**
* Copyright (c) 2011-2020, hubin ([email protected]).
*
* 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.engine;
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.util.Map;
import java.util.Properties;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.app.VelocityEngine;
import com.baomidou.mybatisplus.generator.config.ConstVal;
import com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder;
import com.baomidou.mybatisplus.toolkit.StringUtils;
/**
*
* Velocity 模板引擎实现文件输出
*
*
* @author hubin
* @since 2018-01-10
*/
public class VelocityTemplateEngine extends AbstractTemplateEngine {
private static final String DOT_VM = ".vm";
private VelocityEngine velocityEngine;
@Override
public VelocityTemplateEngine init(ConfigBuilder configBuilder) {
super.init(configBuilder);
if (null == velocityEngine) {
Properties p = new Properties();
p.setProperty(ConstVal.VM_LOADPATH_KEY, ConstVal.VM_LOADPATH_VALUE);
p.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH, "");
p.setProperty(Velocity.ENCODING_DEFAULT, ConstVal.UTF8);
p.setProperty(Velocity.INPUT_ENCODING, ConstVal.UTF8);
p.setProperty("file.resource.loader.unicode", "true");
velocityEngine = new VelocityEngine(p);
}
return this;
}
@Override
public void writer(Map objectMap, String templatePath, String outputFile) throws Exception {
if (StringUtils.isEmpty(templatePath)) {
return;
}
Template template = velocityEngine.getTemplate(templatePath, ConstVal.UTF8);
FileOutputStream fos = new FileOutputStream(outputFile);
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(fos, ConstVal.UTF8));
template.merge(new VelocityContext(objectMap), writer);
writer.close();
logger.debug("模板:" + templatePath + "; 文件:" + outputFile);
}
@Override
public String templateFilePath(String filePath) {
if (null == filePath || filePath.contains(DOT_VM)) {
return filePath;
}
StringBuilder fp = new StringBuilder();
fp.append(filePath).append(DOT_VM);
return fp.toString();
}
}