jsqlparser 工具类获取 where 参数

1、需求：

需求：目前有一方需要使用where一类的sql当参数传过来，我们接受参数，然后转成我们本地的参数，去查询我们数据。

举例：

• 对方：类似这种json ，key 是一个where的sql
  • {"vulKeys": "vul_id='DADASDASDSAAAAAAAAAA' and key between 1 and 5 "}
• 我方：需要转换成我们自己的映射字段
  • {"vulKeys": "vul_id_a='DADASDASDSAAAAAAAAAA' and key_a between 1 and 5 "}

这里面会包含所有可能的sql运算符号，= 、 >=、 <=、 or、 and 、（a=b and c=d）等等 现在来搞一下。

2、代码

引入pom：

      <dependency>
            <groupId>com.github.jsqlparsergroupId>
            <artifactId>jsqlparserartifactId>
            <version>3.1version>
        dependency>
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实现 ：

package com.***;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import net.sf.jsqlparser.JSQLParserException;
import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.expression.Parenthesis;
import net.sf.jsqlparser.expression.operators.conditional.AndExpression;
import net.sf.jsqlparser.expression.operators.conditional.OrExpression;
import net.sf.jsqlparser.expression.operators.relational.Between;
import net.sf.jsqlparser.expression.operators.relational.EqualsTo;
import net.sf.jsqlparser.expression.operators.relational.GreaterThan;
import net.sf.jsqlparser.expression.operators.relational.LikeExpression;
import net.sf.jsqlparser.parser.CCJSqlParserUtil;
import net.sf.jsqlparser.parser.SimpleNode;
import net.sf.jsqlparser.statement.select.PlainSelect;
import net.sf.jsqlparser.statement.select.Select;
import net.sf.jsqlparser.statement.select.SelectBody;
import org.apache.commons.lang3.StringUtils;

import java.util.*;


/**
 * @author fei.chen
 * @date 2022/10/26下午 3:56
 */
public class SqlParserUtil {
   
    public static String getSqlWhereHandel(String sql, Map<String, String> cloumMap) throws JSQLParserException {
        Select select = (Select) CCJSqlParserUtil.parse(sql);
        SelectBody selectBody = select.getSelectBody();
        PlainSelect plainSelect = (PlainSelect) selectBody;
        Expression expr = CCJSqlParserUtil.parseCondExpression(plainSelect.getWhere().toString());

        List<Map<String, Object>> arrList = new ArrayList<>();
        //递归处理
        sqlHandel(expr, arrList);
        //列映射替换
        String sqlResult = cloumHandel(arrList, cloumMap);
        return sqlResult;
    }


    public static String cloumHandel(List<Map<String, Object>> arrList, Map<String, String> cloumMap) {

        for (Map<String, Object> map : arrList) {
            if (map.size() == 3) {
                Optional<Object> first = map.values().stream().findFirst();
                String s = cloumMap.get(first.get().toString());
                if (StringUtils.isNotEmpty(s)) {
                    map.put("left", s);
                }
            }
        }
        StringBuilder sb = new StringBuilder();
        for (Map<String, Object> map : arrList) {
            if (map.size() == 3) {
                sb.append(map.get("left")).append(" ").append(map.get("operator")).append(" ").append(map.get("right")).append(" ");
            } else {
                sb.append(map.values().stream().findFirst().get()).append(" ");
                ;
            }
        }
        return sb.toString();
    }

    public static Object sqlHandel(Object expr, List<Map<String, Object>> arrList) {
        if (expr instanceof OrExpression) {
            Expression leftExpression = ((OrExpression) expr).getLeftExpression();
            sqlHandel(leftExpression, arrList);

            Map<String, Object> param2 = new HashMap<>();
            param2.put("operator", "OR");
            arrList.add(param2);
            Expression rightExpression = ((OrExpression) expr).getRightExpression();
            sqlHandel(rightExpression, arrList);
        } else if (expr instanceof AndExpression) {
            Expression leftExpression = ((AndExpression) expr).getLeftExpression();
            sqlHandel(leftExpression, arrList);
            Map<String, Object> param = new HashMap<>();
            param.put("operator", "AND");
            arrList.add(param);

            Expression rightExpression = ((AndExpression) expr).getRightExpression();
            sqlHandel(rightExpression, arrList);

        } else if (expr instanceof EqualsTo) {
            Map<String, Object> node = getNode((Expression) expr);
            arrList.add(node);
            System.out.println("node-----------------" + node.get("left") + node.get("operator") + node.get("right"));
        } else if (expr instanceof Parenthesis) {
            Expression leftExpression = ((Parenthesis) expr).getExpression();
            Map<String, Object> param1 = new HashMap<>();
            param1.put("operator", "(");
            arrList.add(param1);
            sqlHandel(leftExpression, arrList);
            Map<String, Object> param2 = new HashMap<>();
            param2.put("operator", ")");
            arrList.add(param2);
        } else if (expr instanceof GreaterThan) {
            Map<String, Object> node = getGreaterThanNode((Expression) expr);
            arrList.add(node);
            System.out.println("node-----------------" + node.get("left") + node.get("operator") + node.get("right"));
        } else if (expr instanceof LikeExpression) {
            Map<String, Object> node = getLikeNode((LikeExpression) expr);
            arrList.add(node);
            System.out.println("node-----------------" + node.get("left") + node.get("operator") + node.get("right"));
        }else if(expr instanceof Between){
            Map<String, Object> node = getBetweenNode((Between) expr);
            arrList.add(node);
            System.out.println("node-----------------" + node.get("left") + node.get("operator") + node.get("right"));
        }
        return null;
    }


    public static Map<String, Object> getNode(Expression expression) {
        Map<String, Object> param = new HashMap<>();
        SimpleNode astNode = expression.getASTNode();
        Expression node = (Expression) astNode.jjtGetValue();
        param.put("left", ((EqualsTo) node).getLeftExpression().toString());
        param.put("operator", ((EqualsTo) node).getStringExpression());
        param.put("right", ((EqualsTo) node).getRightExpression().toString());
        return param;
    }

    public static Map<String, Object> getGreaterThanNode(Expression expression) {
        Map<String, Object> param = new HashMap<>();
        String leftExpression = ((Between) expression).getLeftExpression().toString();
        Expression rightExpression = ((Between) expression).getBetweenExpressionStart();
        Expression stringExpression = ((Between) expression).getBetweenExpressionEnd();
        param.put("left", leftExpression);
        param.put("operator", stringExpression);
        param.put("right", rightExpression);
        return param;
    }

    public static Map<String, Object> getLikeNode(Expression expression) {
        Map<String, Object> param = new HashMap<>();
        SimpleNode astNode = expression.getASTNode();
        param.put("left", ((LikeExpression) expression).getLeftExpression().toString());
        param.put("operator", astNode.jjtGetFirstToken().toString());
        param.put("right", astNode.jjtGetLastToken().toString());
        return param;
    }

    public static Map<String, Object> getBetweenNode(Expression expression) {
        Map<String, Object> param = new HashMap<>();
        String start = ((Between) expression).getBetweenExpressionStart().toString();
        String end = ((Between) expression).getBetweenExpressionEnd().toString();
        param.put("left", ((Between) expression).getLeftExpression().toString());
        param.put("operator", "between");
        param.put("right", Integer.parseInt(start) +" AND " + Integer.parseInt(end));
        return param;
    }
}
	// 使用方法
    public static void main(String[] args) throws JSQLParserException {
           String aa = "{\"assetInfoRange\": \"ip like '10.65.128.1'\",\"vulKeys\": \"vul_id='DADASDASDSAAAAAAAAAA'  and key between 1 and 5  \"}";
                "and     key between 1 and 5    \"}";
        JSONObject jsonObject = JSON.parseObject(aa);

        String assetInfoRange = jsonObject.get("assetInfoRange").toString();
        // 测试这个哦
        String vulKeys = jsonObject.get("vulKeys").toString();

        String sql = "select * from aaa where " + vulKeys;

        Map<String, String> map1 = new HashMap<>();
        map1.put("vul_id", "vul_id_a");
        map1.put("university", "university_a");
        map1.put("gpa", "gpa_a");
        // sql是我们要转换的 ； map1 是把sql的字段转换成查询我们数据库的字段
        String s = getSqlWhereHandel(sql, map1);
        System.out.println(s);
    }



// 最后运行结果
vul_id_a = 'MVM-2011-1554368855919435776' AND key between 1 AND 5 
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