公司的ERP强于业务逻辑，疏于技术。数据库查询竟然是继承了javax.swing.table.DefaultTableModel的鬼东西
尽管不能容忍，但全盘重构得要one year。这样的活谁愿意干，原有的程序员也都已经喜欢躺在这种模式中了。
那就先利用Mybatis对新的代码开发、维护想点办法吧。
DefaultTableModel中包含数据的列信息和数据信息。MyBatis通过resultType或者resultMap 或者自定义TypeHandler都无法满足。需要使用MyBatis的Interceptor进行处理。其使用步骤有两步:
1.定义拦截器插件
2.注册拦截器

定义拦截器：(以下用自定义的类型MyType01进行了模拟)

public class ResultPlugin implements Interceptor {
    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        Object[] args = invocation.getArgs();
        Statement statement = (Statement) args[0];
        ResultSet rs = statement.getResultSet();
        ResultSetMetaData rsMetaData = rs.getMetaData();
        MyType01 myType01 = new MyType01();
        Map<String, String> fieldInfo = new HashMap<String, String>();
        myType01.setFieldInfo(fieldInfo);
        System.out.println(rsMetaData);
        for (int i = 0; i < rsMetaData.getColumnCount(); i++) {
            String columnName = rsMetaData.getColumnName(i + 1);
            String columnClassName = rsMetaData.getColumnClassName(i + 1);
            fieldInfo.put(columnName, columnClassName);
            System.out.println(columnName + ":" + columnClassName);
        }
        while (rs == null) {
            if (statement.getMoreResults()) {
                rs = statement.getResultSet();
            } else {
                if (statement.getUpdateCount() == -1) {
                    break;
                }
            }
        }
        Set<String> keySet = fieldInfo.keySet();

        List<Map<String, ?>> result = new ArrayList<Map<String, ?>>();
        myType01.setResult(result);
        if (rs != null) {
            while (rs.next()) {
                Map<String, String> row = new HashMap<String, String>();
                result.add(row);
                Iterator<String> fieldNames = keySet.iterator();
                while (fieldNames.hasNext()) {
                    String fieldName = fieldNames.next();
                    String fieldValue = rs.getString(fieldName);
                    row.put(fieldName, fieldValue);
                    System.out.print(fieldName + "=" + fieldValue);
                }
                System.out.println();
            }
        }
        return Arrays.asList(myType01);
    }

    @Override
    public Object plugin(Object target) {
        return Plugin.wrap(target, this);
    }

    @Override
    public void setProperties(Properties properties) {
    }
}

注册拦截器
<configuration>
<plugins>
<plugin interceptor="com.ebitg.mybatis.ResultPlugin">
</plugin>
</plugins>
</configuration>

image.png

打完收工....