修复MYSQL查询语句不兼容问题，特殊union

chenjiahe

2022-05-05 42c9e166a8835ad1986d4fb55299acb64623157c

 src/main/java/com/hx/mybatis/aes/springbean/SqlUtils.java

@@ -14,6 +14,8 @@
import com.alibaba.druid.util.JdbcConstants;
import com.alibaba.druid.util.JdbcUtils;
import com.hx.util.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Collection;
import java.util.List;
@@ -24,8 +26,11 @@
 * @author CJH 2022-01-12
 */
public class SqlUtils {
    //log4j日志
    private static Logger logger = LoggerFactory.getLogger(SqlUtils.class.getName());

    /**查询加密数据处理，只对查询做处理，select返回不做处理

    /**查询加密数据处理，只对查询做处理
     * @param sql sql语句
     * @param aesKeysTable aes秘钥
     * @return
@@ -34,13 +39,88 @@

        MySqlStatementParser parser = new MySqlStatementParser(sql);
        SQLSelectStatement sqlStatement = (SQLSelectStatement) parser.parseSelect();
        //获取格式化的slq语句
        sql = sqlStatement.toString();

        SQLSelect sqlSelect = sqlStatement.getSelect();
        if (sqlSelect.getQuery() instanceof SQLSelectQueryBlock) {
            // 非union的查询语句
            return selectSqlRoutine( sqlStatement,aesKeysTable);
        } else if (sqlSelect.getQuery() instanceof SQLUnionQuery) {
            // union的查询语句
            return selectSqlUnion( sql, sqlStatement, aesKeysTable);
        }else {
            return selectSqlRoutine( sqlStatement,aesKeysTable);
        }
    }

    /**查询加密数据处理，只对查询做处理，select返回不做处理（Union特殊语句）
     * @param sql sql语句
     * @param aesKeysTable aes秘钥
     * @return
     */
    public static String selectSqlUnion(String sql,SQLSelectStatement sqlStatement,Map<String,Map<String,String>> aesKeysTable){

        //获取表和别名
        ExportTableAliasVisitor visitorTable = new ExportTableAliasVisitor();
        sqlStatement.accept(visitorTable);
        Map<String,String> tableMaps = visitorTable.getTableMap();

        //获取所有的字段
        MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
        sqlStatement.accept(visitor);
        //遍历所有字段
        Collection<TableStat.Column> columns= visitor.getColumns();

        //处理需要加密得字段

        if(!StringUtils.isEmpty(sql)){
            Map<String,String> aesKeys = null;
            String aeskey = null;
            //把剩下的拼接上来
            String tableAl = null;
            for(TableStat.Column column:columns){
                aesKeys= aesKeysTable.get(column.getTable());
                if(aesKeys == null){
                    continue;
                }
                aeskey = aesKeys.getOrDefault(column.getName(),null);
                if(StringUtils.isEmpty(aeskey)){
                    continue;
                }
                tableAl = tableMaps.get(column.getTable());
                if(!StringUtils.isEmpty(tableAl)){
                    tableAl = tableAl+"."+column.getName();
                }else{
                    tableAl = column.getName();
                }
                sql = sql.replaceAll("((?<!\\.)\\b"+tableAl+"\\b(?!\\.))","AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"')");
            }
        }
        return sql;
    }


    /**查询加密数据处理，只对查询做处理，select返回不做处理（常规语句）
     * @param sqlStatement sql语句
     * @param aesKeysTable aes秘钥
     * @return
     */
    public static String selectSqlRoutine(SQLSelectStatement sqlStatement,Map<String,Map<String,String>> aesKeysTable){

        //解析select查询
        //SQLSelect sqlSelect = sqlStatement.getSelect()
        //获取sql查询块
        SQLSelectQueryBlock sqlSelectQuery = (SQLSelectQueryBlock)sqlStatement.getSelect().getQuery() ;
        SQLSelectQueryBlock sqlSelectQuery = null;
        boolean b = true;
        try{
            sqlSelectQuery = (SQLSelectQueryBlock)sqlStatement.getSelect().getQuery() ;
        }catch (Exception e){
            b = false;
            logger.error("解析sql报错："+e.getMessage());
        }
        if(!b){
            return "err";
        }

        StringBuffer out = new StringBuffer() ;
        //创建sql解析的标准化输出
        SQLASTOutputVisitor sqlastOutputVisitor = SQLUtils.createFormatOutputVisitor(out , null , JdbcUtils.MYSQL) ;
@@ -66,20 +146,22 @@
            if(sqlSelect.length() > 7){
                sqlSelect.append(",");
            }
            expr = sqlSelectItem.getExpr().toString();
            if(expr.indexOf("SELECT") == -1){

            out.delete(0, out.length()) ;
            sqlSelectItem.accept(sqlastOutputVisitor) ;
            expr = out.toString();
            sqlSelect.append(expr);

           /* if(expr.indexOf("SELECT") == -1){
                sqlSelect.append(expr);
                if(!StringUtils.isEmpty(sqlSelectItem.getAlias())){
                    sqlSelect.append(" AS "+sqlSelectItem.getAlias());
                }
            }else{
                sqlSelect.append("(");
                sqlSelect.append(selectSqlHandle(expr,aesKeysTable,tableMaps,columns));
                sqlSelect.append(")");
                if(!StringUtils.isEmpty(sqlSelectItem.getAlias())){
                //sqlSelect.append("(");
                sqlSelect.append(expr);
                //sqlSelect.append(")");
               *//* if(!StringUtils.isEmpty(sqlSelectItem.getAlias())){
                    sqlSelect.append(" AS "+sqlSelectItem.getAlias());
                }
            }
                }*//*
            }*/
        }

        //解析from
@@ -113,7 +195,7 @@
        }

        //处理where需要加密得字段
        sql = sqlWhere.toString();
        String sql = sqlWhere.toString();
        if(!StringUtils.isEmpty(sql)){
            Map<String,String> aesKeys = null;
            String aeskey = null;
@@ -134,12 +216,20 @@
                }else{
                    tableAl = column.getName();
                }
                sql = sql.replaceAll("( |\\n|\\()"+tableAl+"( |\\n|\\))"," AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"') ");
                sql = sql.replaceAll("((?<!\\.)\\b"+tableAl+"\\b(?!\\.))","AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"')");
            }
        }
        return sqlSelect.toString()+sql;
    }

    /**
     * 处理select返回字段的参数
     * @param sql
     * @param aesKeysTable
     * @param tableMaps
     * @param columns
     * @return
     */
    public static String selectSqlHandle(String sql,Map<String,Map<String,String>> aesKeysTable
            ,Map<String,String> tableMaps,Collection<TableStat.Column> columns){

@@ -235,7 +325,7 @@
                }else{
                    tableAl = column.getName();
                }
                sql = sql.replaceAll("( |\\n|\\()"+tableAl+"( |\\n|\\))"," AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"') ");
                sql = sql.replaceAll("((?<!\\.)\\b"+tableAl+"\\b(?!\\.))","AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"')");
            }
        }
        return sqlSelect.toString()+sql;
@@ -399,11 +489,11 @@
                }else{
                    tableAl = column.getName();
                }
                sqlWhere = sqlWhere.replaceAll("( |\\n|\\()"+tableAl+"( |\\n|\\))"," AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"') ");
                sqlWhere = sqlWhere.replaceAll("((?<!\\.)\\b"+tableAl+"\\b(?!\\.))","AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"')");
            }

        }
        splicingSql.append(sqlWhere.toString());
        splicingSql.append(sqlWhere);
        return splicingSql.toString();
    }

@@ -477,11 +567,11 @@
                }else{
                    tableAl = column.getName();
                }
                sqlWhere = sqlWhere.replaceAll("( |\\n|\\()"+tableAl+"( |\\n|\\))"," AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"') ");
                sqlWhere = sqlWhere.replaceAll("((?<!\\.)\\b"+tableAl+"\\b(?!\\.))","AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"')");
            }

        }
        splicingSql.append(sqlWhere.toString());
        splicingSql.append(sqlWhere);
        return splicingSql.toString();
    }