MyBatis Generator生成的$ sql是否存在注入风险

╰+哭是因爲堅強的太久メ 2023-10-11 12:34 38阅读 0赞

# 代理商sql注入问题排查 #

经全面排查，代理商中sql层使用’$’获取对象的只有一种类型，代码格式如下：

<sql id="Example_Where_Clause">
       
      <where>
          <foreach collection="oredCriteria" item="criteria" separator="or">
             <if test="criteria.valid">
                <trim prefix="(" suffix=")" prefixOverrides="and">
                   <foreach collection="criteria.criteria" item="criterion">
                      <choose>
                         <when test="criterion.noValue">
                            and ${criterion.condition}
                         </when>
                         <when test="criterion.singleValue">
                            and ${criterion.condition} #{criterion.value}
                         </when>
                         <when test="criterion.betweenValue">
                            and ${criterion.condition} #{criterion.value} and
                            #{criterion.secondValue}
                         </when>
                         <when test="criterion.listValue">
                            and ${criterion.condition}
                            <foreach collection="criterion.value" item="listItem"
      open="(" close=")" separator=",">
                               #{listItem}
                            </foreach>
                         </when>
                      </choose>
                   </foreach>
                </trim>
             </if>
          </foreach>
       </where>
    </sql>

接下来我们在测试demo中复现下情况：

# 准备测试demo #

## entity ##

### Product.java ###

普通实体类，对应数据库中product表，表结构见附录：

package com.zhrb.springcloud.entity;
    
    import lombok.Data;
    import lombok.ToString;
    
    /**
     * @ClassName Product
     * @Description TODO
      * @Author Administrator
     * @Date 2019/9/3 14:26
     * @Version
      */ @Data @ToString public class Product {
    
        //主键
      private Long pid;
    
        //产品名称
      private String productName;
    
        // 来自哪个数据库，因为微服务架构可以一个服务对应一个数据库，同一个信息被存储到不同数据库
      private String dbSource;
    }

### ProductExample.java ###

同代理商环境一样的动态条件类：

package com.zhrb.springcloud.entity;
    
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * @ClassName ProductExample
     * @Description TODO
      * @Author Administrator
     * @Date 2019/9/20 9:07
     * @Version
      */ public class ProductExample {
        /**
     * This field was generated by MyBatis Generator. * This field corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      protected String orderByClause;
    
        /**
     * This field was generated by MyBatis Generator. * This field corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      protected boolean distinct;
    
        /**
     * This field was generated by MyBatis Generator. * This field corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      protected List<Criteria> oredCriteria;
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public ProductExample() {
            oredCriteria = new ArrayList<Criteria>();
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public void setOrderByClause(String orderByClause) {
            this.orderByClause = orderByClause;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public String getOrderByClause() {
            return orderByClause;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public void setDistinct(boolean distinct) {
            this.distinct = distinct;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public boolean isDistinct() {
            return distinct;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public List<Criteria> getOredCriteria() {
            return oredCriteria;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public void or(Criteria criteria) {
            oredCriteria.add(criteria);
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public Criteria or() {
            Criteria criteria = createCriteriaInternal();
            oredCriteria.add(criteria);
            return criteria;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public Criteria createCriteria() {
            Criteria criteria = createCriteriaInternal();
            if (oredCriteria.size() == 0) {
                oredCriteria.add(criteria);
            }
            return criteria;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      protected Criteria createCriteriaInternal() {
            Criteria criteria = new Criteria();
            return criteria;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public void clear() {
            oredCriteria.clear();
            orderByClause = null;
            distinct = false;
        }
    
        /**
     * This class was generated by MyBatis Generator. * This class corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      protected abstract static class GeneratedCriteria {
            protected List<Criterion> criteria;
    
            protected GeneratedCriteria() {
                super();
                criteria = new ArrayList<Criterion>();
            }
    
            public boolean isValid() {
                return criteria.size() > 0;
            }
    
            public List<Criterion> getAllCriteria() {
                return criteria;
            }
    
            public List<Criterion> getCriteria() {
                return criteria;
            }
    
            protected void addCriterion(String condition) {
                if (condition == null) {
                    throw new RuntimeException("Value for condition cannot be null");
                }
                criteria.add(new Criterion(condition));
            }
    
            protected void addCriterion(String condition, Object value, String property) {
                if (value == null) {
                    throw new RuntimeException("Value for " + property + " cannot be null");
                }
                criteria.add(new Criterion(condition, value));
            }
    
            protected void addCriterion(String condition, Object value1, Object value2, String property) {
                if (value1 == null || value2 == null) {
                    throw new RuntimeException("Between values for " + property + " cannot be null");
                }
                criteria.add(new Criterion(condition, value1, value2));
            }
    
            public Criteria andIdIsNull() {
                addCriterion("PID is null");
                return (Criteria) this;
            }
    
            public Criteria andIdIsNotNull() {
                addCriterion("PID is not null");
                return (Criteria) this;
            }
    
            public Criteria andIdEqualTo(String value) {
                addCriterion("PID =", value, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdNotEqualTo(String value) {
                addCriterion("PID <>", value, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdGreaterThan(String value) {
                addCriterion("PID >", value, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdGreaterThanOrEqualTo(String value) {
                addCriterion("PID >=", value, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdLessThan(String value) {
                addCriterion("PID <", value, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdLessThanOrEqualTo(String value) {
                addCriterion("PID <=", value, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdLike(String value) {
                addCriterion("PID like", value, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdNotLike(String value) {
                addCriterion("PID not like", value, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdIn(List<String> values) {
                addCriterion("PID in", values, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdNotIn(List<String> values) {
                addCriterion("PID not in", values, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdBetween(String value1, String value2) {
                addCriterion("PID between", value1, value2, "pid");
                return (Criteria) this;
            }
    
            public Criteria andIdNotBetween(String value1, String value2) {
                addCriterion("PID not between", value1, value2, "pid");
                return (Criteria) this;
            }
        }
    
        /**
     * This class was generated by MyBatis Generator. * This class corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated do_not_delete_during_merge
     */  public static class Criteria extends GeneratedCriteria {
    
            protected Criteria() {
                super();
            }
        }
    
        /**
     * This class was generated by MyBatis Generator. * This class corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public static class Criterion {
            private String condition;
    
            private Object value;
    
            private Object secondValue;
    
            private boolean noValue;
    
            private boolean singleValue;
    
            private boolean betweenValue;
    
            private boolean listValue;
    
            private String typeHandler;
    
            public String getCondition() {
                return condition;
            }
    
            public Object getValue() {
                return value;
            }
    
            public Object getSecondValue() {
                return secondValue;
            }
    
            public boolean isNoValue() {
                return noValue;
            }
    
            public boolean isSingleValue() {
                return singleValue;
            }
    
            public boolean isBetweenValue() {
                return betweenValue;
            }
    
            public boolean isListValue() {
                return listValue;
            }
    
            public String getTypeHandler() {
                return typeHandler;
            }
    
            protected Criterion(String condition) {
                super();
                this.condition = condition;
                this.typeHandler = null;
                this.noValue = true;
            }
    
            protected Criterion(String condition, Object value, String typeHandler) {
                super();
                this.condition = condition;
                this.value = value;
                this.typeHandler = typeHandler;
                if (value instanceof List<?>) {
                    this.listValue = true;
                } else {
                    this.singleValue = true;
                }
            }
    
            protected Criterion(String condition, Object value) {
                this(condition, value, null);
            }
    
            protected Criterion(String condition, Object value, Object secondValue, String typeHandler) {
                super();
                this.condition = condition;
                this.value = value;
                this.secondValue = secondValue;
                this.typeHandler = typeHandler;
                this.betweenValue = true;
            }
    
            protected Criterion(String condition, Object value, Object secondValue) {
                this(condition, value, secondValue, null);
            }
        }
    }

## 控制层ProductController.java ##

package com.zhrb.springcloud.controller;
    
    import com.zhrb.springcloud.entity.Product;
    import com.zhrb.springcloud.entity.ProductExample;
    import com.zhrb.springcloud.service.ProductService;
    import io.swagger.annotations.Api;
    import io.swagger.annotations.ApiOperation;
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.*;
    
    import java.util.Collection;
    import java.util.List;
    
    /**
     * @ClassName ProductController
     * @Description TODO
      * @Author zhrb
     * @Date 2019/9/3 15:18
     * @Version
      */ @RestController @RequestMapping("/product")
    @MapperScan("com.zhrb.springcloud.mapper")
    @Api(value = "/product",description = "商品管理 程序员小圈圈",position = 1)
    public class ProductController {
    
        @Autowired
      private ProductService productService;
    
        
    
        @ApiOperation(value="测试是否预编译", notes="测试是否预编译")
        @GetMapping(value = "/testList")
        public List<Product> testList() {
            ProductExample example = new ProductExample();
            example.createCriteria().andIdLike("1' or '1=1");
            List<Product> productList = productService.list(example);
            for (Product p :productList){
                p.setProductName(p.getProductName()+"本条数据来自8001");
            }
            return productList;
        }
    
    }

## service层 ##

### ProductService.java ###

package com.zhrb.springcloud.service;
    
    import com.zhrb.springcloud.entity.Product;
    import com.zhrb.springcloud.entity.ProductExample;
    
    import java.util.List;
    
    /**
     * @ClassName ProductService
     * @Description TODO
      * @Author Administrator
     * @Date 2019/9/3 15:15
     * @Version
      */ public interface ProductService {
    
        List<Product> list(ProductExample example);
    }

### ProductServiceImpl.java ###

package com.zhrb.springcloud.service.impl;
    
    import com.zhrb.springcloud.entity.Product;
    import com.zhrb.springcloud.entity.ProductExample;
    import com.zhrb.springcloud.mapper.ProductMapper;
    import com.zhrb.springcloud.service.ProductService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import java.util.List;
    
    /**
     * @ClassName ProductServiceImpl
     * @Description TODO
      * @Author Administrator
     * @Date 2019/9/3 15:16
     * @Version
      */   @Service public class ProductServiceImpl implements ProductService{
    
        @Autowired
      private ProductMapper productMapper;
    
        
    
        @Override
      public List<Product> list(ProductExample example) {
            return productMapper.testList(example);
        }
    }

## mapper ##

### ProductController.java ###

package com.zhrb.springcloud.mapper;
    
    import com.zhrb.springcloud.entity.Product;
    import com.zhrb.springcloud.entity.ProductExample;
    import org.apache.ibatis.annotations.Mapper;
    
    import java.util.List;
    
    /**
     * @ClassName ProductMapper
     * @Description TODO
      * @Author Administrator
     * @Date 2019/9/3 14:55
     * @Version
      */ 
      @Mapper 
      public interface ProductMapper {
       
        List<Product> testList(ProductExample example);
    }

### ProductController.xml ###

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE  mapper  PUBLIC  "-//mybatis.org//DTD Mapper 3.0//EN"   "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.zhrb.springcloud.mapper.ProductMapper">
        
        <select id="testList" parameterType="com.zhrb.springcloud.entity.ProductExample" resultType="com.zhrb.springcloud.entity.Product">
            select
            pid, product_name, db_source
            from product
            <if test="_parameter != null" >
                <include refid="Example_Where_Clause" />
            </if>
            <if test="orderByClause != null" >
                order by ${orderByClause}
            </if>
        </select>
    
        <sql id="Example_Where_Clause" >
              <where >
                <foreach collection="oredCriteria" item="criteria" separator="or" >
                    <if test="criteria.valid" >
                        <trim prefix="(" suffix=")" prefixOverrides="and" >
                            <foreach collection="criteria.criteria" item="criterion" >
                                <choose >
                                    <when test="criterion.noValue" >
                                        and ${criterion.condition}
                                    </when>
                                    <when test="criterion.singleValue" >
                                        and ${criterion.condition} #{criterion.value}
                                    </when>
                                    <when test="criterion.betweenValue" >
                                        and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                                    </when>
                                    <when test="criterion.listValue" >
                                        and ${criterion.condition}
                                        <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
                                            #{listItem}
                                        </foreach>
                                    </when>
                                </choose>
                            </foreach>
                        </trim>
                    </if>
                </foreach>
            </where>
        </sql>
    </mapper>

# 测试 #

## 测试1：正常逻辑测试 ##

首先按照正常代码逻辑测试，校验代码是否成功，测试结果截图如下：  
![format_png][]

可以看到调用成功，证明代码逻辑没问题，接下来进行异常测试：

## 测试2：测试不存在的表字段 ##

修改ProductExample.java如下（数据库中字段为pid，无id，故先将pid改为id测试不存在字段编译过程）：

package com.zhrb.springcloud.entity;
    
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * @ClassName ProductExample
     * @Description TODO
      * @Author Administrator
     * @Date 2019/9/20 9:07
     * @Version
      */ public class ProductExample {
        /**
     * This field was generated by MyBatis Generator. * This field corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      protected String orderByClause;
    
        /**
     * This field was generated by MyBatis Generator. * This field corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      protected boolean distinct;
    
        /**
     * This field was generated by MyBatis Generator. * This field corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      protected List<Criteria> oredCriteria;
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public ProductExample() {
            oredCriteria = new ArrayList<Criteria>();
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public void setOrderByClause(String orderByClause) {
            this.orderByClause = orderByClause;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public String getOrderByClause() {
            return orderByClause;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public void setDistinct(boolean distinct) {
            this.distinct = distinct;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public boolean isDistinct() {
            return distinct;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public List<Criteria> getOredCriteria() {
            return oredCriteria;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public void or(Criteria criteria) {
            oredCriteria.add(criteria);
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public Criteria or() {
            Criteria criteria = createCriteriaInternal();
            oredCriteria.add(criteria);
            return criteria;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public Criteria createCriteria() {
            Criteria criteria = createCriteriaInternal();
            if (oredCriteria.size() == 0) {
                oredCriteria.add(criteria);
            }
            return criteria;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      protected Criteria createCriteriaInternal() {
            Criteria criteria = new Criteria();
            return criteria;
        }
    
        /**
     * This method was generated by MyBatis Generator. * This method corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public void clear() {
            oredCriteria.clear();
            orderByClause = null;
            distinct = false;
        }
    
        /**
     * This class was generated by MyBatis Generator. * This class corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      protected abstract static class GeneratedCriteria {
            protected List<Criterion> criteria;
    
            protected GeneratedCriteria() {
                super();
                criteria = new ArrayList<Criterion>();
            }
    
            public boolean isValid() {
                return criteria.size() > 0;
            }
    
            public List<Criterion> getAllCriteria() {
                return criteria;
            }
    
            public List<Criterion> getCriteria() {
                return criteria;
            }
    
            protected void addCriterion(String condition) {
                if (condition == null) {
                    throw new RuntimeException("Value for condition cannot be null");
                }
                criteria.add(new Criterion(condition));
            }
    
            protected void addCriterion(String condition, Object value, String property) {
                if (value == null) {
                    throw new RuntimeException("Value for " + property + " cannot be null");
                }
                criteria.add(new Criterion(condition, value));
            }
    
            protected void addCriterion(String condition, Object value1, Object value2, String property) {
                if (value1 == null || value2 == null) {
                    throw new RuntimeException("Between values for " + property + " cannot be null");
                }
                criteria.add(new Criterion(condition, value1, value2));
            }
    
            public Criteria andIdIsNull() {
                addCriterion("id is null");
                return (Criteria) this;
            }
    
            public Criteria andIdIsNotNull() {
                addCriterion("id is not null");
                return (Criteria) this;
            }
    
            public Criteria andIdEqualTo(String value) {
                addCriterion("id =", value, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdNotEqualTo(String value) {
                addCriterion("id <>", value, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdGreaterThan(String value) {
                addCriterion("id >", value, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdGreaterThanOrEqualTo(String value) {
                addCriterion("id >=", value, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdLessThan(String value) {
                addCriterion("id <", value, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdLessThanOrEqualTo(String value) {
                addCriterion("id <=", value, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdLike(String value) {
                addCriterion("id like", value, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdNotLike(String value) {
                addCriterion("id not like", value, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdIn(List<String> values) {
                addCriterion("id in", values, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdNotIn(List<String> values) {
                addCriterion("id not in", values, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdBetween(String value1, String value2) {
                addCriterion("id between", value1, value2, "id");
                return (Criteria) this;
            }
    
            public Criteria andIdNotBetween(String value1, String value2) {
                addCriterion("id not between", value1, value2, "id");
                return (Criteria) this;
            }
        }
    
        /**
     * This class was generated by MyBatis Generator. * This class corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated do_not_delete_during_merge
     */  public static class Criteria extends GeneratedCriteria {
    
            protected Criteria() {
                super();
            }
        }
    
        /**
     * This class was generated by MyBatis Generator. * This class corresponds to the database table CPT_DLS_CONFIG * * @mbggenerated
      */
      public static class Criterion {
            private String condition;
    
            private Object value;
    
            private Object secondValue;
    
            private boolean noValue;
    
            private boolean singleValue;
    
            private boolean betweenValue;
    
            private boolean listValue;
    
            private String typeHandler;
    
            public String getCondition() {
                return condition;
            }
    
            public Object getValue() {
                return value;
            }
    
            public Object getSecondValue() {
                return secondValue;
            }
    
            public boolean isNoValue() {
                return noValue;
            }
    
            public boolean isSingleValue() {
                return singleValue;
            }
    
            public boolean isBetweenValue() {
                return betweenValue;
            }
    
            public boolean isListValue() {
                return listValue;
            }
    
            public String getTypeHandler() {
                return typeHandler;
            }
    
            protected Criterion(String condition) {
                super();
                this.condition = condition;
                this.typeHandler = null;
                this.noValue = true;
            }
    
            protected Criterion(String condition, Object value, String typeHandler) {
                super();
                this.condition = condition;
                this.value = value;
                this.typeHandler = typeHandler;
                if (value instanceof List<?>) {
                    this.listValue = true;
                } else {
                    this.singleValue = true;
                }
            }
    
            protected Criterion(String condition, Object value) {
                this(condition, value, null);
            }
    
            protected Criterion(String condition, Object value, Object secondValue, String typeHandler) {
                super();
                this.condition = condition;
                this.value = value;
                this.secondValue = secondValue;
                this.typeHandler = typeHandler;
                this.betweenValue = true;
            }
    
            protected Criterion(String condition, Object value, Object secondValue) {
                this(condition, value, secondValue, null);
            }
        }
    }

测试结果如下：

![format_png 1][]

可以看到，编译出错，证明此时虽然用的是$取值，也经过了预编译，继续看下面。

## 测试3：like注入测试1 ##

代码及结果截图如下：

![format_png 2][]  
![format_png 3][]

从上面的图可以得知：  
此种注入，在封装Criteria时把传入的参数整体当做一个对象然后传递下去，本次测试如上图1，打了两个断点，但是没执行到第二个断点处即中断执行，后台日志报错，证明此种注入sql有误无法正常执行。

## 测试3：like注入测试2 ##

代码及结果截图如下：

![format_png 4][]  
![format_png 1][]  
like注入测试1中我们debug可以看到参数似乎拼接方式有误，那么本次注入即正常注入方式，debug看参数，如果将

andIdLike 值设置为：‘1’ or ‘1=1’  
数据上执行的sql理论上是：

SELECT * from product WHERE pid LIKE '1' or '1=1';

在数据库中执行此条sql结果如下：  
![format_png 5][]

但是demo执行查询结果为空，并且控制台报错，证明此种注入亦不能注入成功。

# 结论 #

经以上demo测试，此种$获取值不会受到sql注入的影响，常规sql注入失败。

# 附录 #

数据库表结构：

/*
    Navicat MySQL Data Transfer
    
    Source Server         : BWG-104.225.147.76
    Source Server Version : 50644
    Source Host           : 104.225.147.76:3306
    Source Database       : springcloud_db01
    
    Target Server Type    : MYSQL
    Target Server Version : 50644
    File Encoding         : 65001
    
    Date: 2019-09-20 10:23:41
    */
    
    SET FOREIGN_KEY_CHECKS=0;
    
    -- ----------------------------
    -- Table structure for product
    -- ----------------------------
    DROP TABLE IF EXISTS `product`;
    CREATE TABLE `product` (
      `pid` bigint(20) NOT NULL AUTO_INCREMENT,
      `product_name` varchar(50) DEFAULT NULL,
      `db_source` varchar(50) DEFAULT NULL,
      PRIMARY KEY (`pid`)
    ) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
    
    -- ----------------------------
    -- Records of product
    -- ----------------------------
    INSERT INTO `product` VALUES ('1', '手机', 'springcloud_db01');
    INSERT INTO `product` VALUES ('2', '冰箱', 'springcloud_db01');
    INSERT INTO `product` VALUES ('3', '电脑', 'springcloud_db01');
    INSERT INTO `product` VALUES ('4', '洗衣机', 'springcloud_db01');
    INSERT INTO `product` VALUES ('5', '电视', 'springcloud_db01');
    INSERT INTO `product` VALUES ('6', '音响', 'springcloud_db01');

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