mybatis generator自动生成代码时mapper.xml会追加不会覆盖问题解决

Mybatis生成时mapper.xml文件中会追加resultMap,而不是直接覆盖,以前的做法是直接删除mapper.xml重新生成,根本解决办法:

MyBatis Generator 在1.3.7版本提供了解决方案



    org.mybatis.generator
    mybatis-generator-core
    1.3.7

在generatorConfig.xml文件中添加覆盖mapper.xml的插件



然后重新生成就灭有问题了。

附逆向工程代码:
mybatis-generator.xml





    
    
        
        
        
        
        
        
        
        
        
            
            
            
            
        
        
        
            
            
        
        
        
        
        
        
        
        
        

MybatisGeneratorUtil

package com.example.bookstore.utils;


import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
import sun.nio.cs.Surrogate;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

public class MybatisGeneratorUtil {

  public static void main(String[] args) {
    try {
    //dao层 执行过程中的警告信息
    List warnings = new ArrayList();
    //当生成的代码重复时,覆盖原代码
    boolean overwrite = true;
    //读取我们的dao配置文件
    InputStream is = Surrogate.Generator.class.getResourceAsStream("/mybatis-generator.xml");
    ConfigurationParser cp = new ConfigurationParser(warnings);
    Configuration config = cp.parseConfiguration(is);
    is.close();

    DefaultShellCallback callback = new DefaultShellCallback(overwrite);
    //创建
    MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
    //执行生成代码
    myBatisGenerator.generate(null);
    //输出警告信息
    for (String warning : warnings) {
      System.out.println(warning);
    }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

}


CommentGenerator

package com.example.bookstore.dao;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.dom.java.Field;
import org.mybatis.generator.internal.DefaultCommentGenerator;
import org.mybatis.generator.internal.util.StringUtility;

import java.util.Properties;

/**
 * 自定义注释生成器
 * Created by macro on 2018/4/26.
 */
public class CommentGenerator extends DefaultCommentGenerator {
    private boolean addRemarkComments = false;

    /**
     * 设置用户配置的参数
     */
    @Override
    public void addConfigurationProperties(Properties properties) {
        super.addConfigurationProperties(properties);
        this.addRemarkComments = StringUtility.isTrue(properties.getProperty("addRemarkComments"));
    }

    /**
     * 给字段添加注释
     */
    @Override
    public void addFieldComment(Field field, IntrospectedTable introspectedTable,
                                IntrospectedColumn introspectedColumn) {
        String remarks = introspectedColumn.getRemarks();
        //根据参数和备注信息判断是否添加备注信息
        if (addRemarkComments && StringUtility.stringHasValue(remarks)) {
            addFieldJavaDoc(field, remarks);
        }
    }

    /**
     * 给model的字段添加注释
     */
    private void addFieldJavaDoc(Field field, String remarks) {
        //文档注释开始
        field.addJavaDocLine("/**");
        //获取数据库字段的备注信息
        String[] remarkLines = remarks.split(System.getProperty("line.separator"));
        for (String remarkLine : remarkLines) {
            field.addJavaDocLine(" * " + remarkLine);
        }
        addJavadocTag(field, false);
        field.addJavaDocLine(" */");
    }

}

generator.properties

jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.connectionURL=jdbc:mysql://localhost:3306/edf?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
jdbc.userId=root
jdbc.password=

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