diff --git a/mybatis-plus-join-adapter/mybatis-plus-join-adapter-base/src/main/java/com/github/yulichang/adapter/base/ITableInfoAdapter.java b/mybatis-plus-join-adapter/mybatis-plus-join-adapter-base/src/main/java/com/github/yulichang/adapter/base/ITableInfoAdapter.java
index 8fa6d08..1614f55 100644
--- a/mybatis-plus-join-adapter/mybatis-plus-join-adapter-base/src/main/java/com/github/yulichang/adapter/base/ITableInfoAdapter.java
+++ b/mybatis-plus-join-adapter/mybatis-plus-join-adapter-base/src/main/java/com/github/yulichang/adapter/base/ITableInfoAdapter.java
@@ -4,6 +4,9 @@ import com.baomidou.mybatisplus.core.metadata.TableFieldInfo;
 import com.baomidou.mybatisplus.core.metadata.TableInfo;
 import org.apache.ibatis.session.Configuration;
 
+import java.lang.reflect.Field;
+import java.util.function.Supplier;
+
 /**
  * @author yulichang
  * @since 1.4.3
@@ -19,4 +22,6 @@ public interface ITableInfoAdapter {
     boolean mpjHasPK(TableInfo tableInfo);
 
     Configuration mpjGetConfiguration(TableInfo tableInfo);
+
+    Field mpjGetField(TableFieldInfo fieldInfo, Supplier<Field> supplier);
 }
diff --git a/mybatis-plus-join-adapter/mybatis-plus-join-adapter-v33x/src/main/java/com/github/yulichang/adapter/v33x/TableInfoAdapterV33x.java b/mybatis-plus-join-adapter/mybatis-plus-join-adapter-v33x/src/main/java/com/github/yulichang/adapter/v33x/TableInfoAdapterV33x.java
index a2edcde..73dc984 100644
--- a/mybatis-plus-join-adapter/mybatis-plus-join-adapter-v33x/src/main/java/com/github/yulichang/adapter/v33x/TableInfoAdapterV33x.java
+++ b/mybatis-plus-join-adapter/mybatis-plus-join-adapter-v33x/src/main/java/com/github/yulichang/adapter/v33x/TableInfoAdapterV33x.java
@@ -6,7 +6,9 @@ import com.baomidou.mybatisplus.core.toolkit.StringUtils;
 import com.github.yulichang.adapter.base.ITableInfoAdapter;
 import org.apache.ibatis.session.Configuration;
 
+import java.lang.reflect.Field;
 import java.util.Objects;
+import java.util.function.Supplier;
 
 /**
  * @author yulichang
@@ -40,4 +42,9 @@ public class TableInfoAdapterV33x implements ITableInfoAdapter {
     public Configuration mpjGetConfiguration(TableInfo tableInfo) {
         return tableInfo.getConfiguration();
     }
+
+    @Override
+    public Field mpjGetField(TableFieldInfo fieldInfo, Supplier<Field> supplier) {
+        return supplier.get();
+    }
 }
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/adapter/TableInfoAdapter.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/adapter/TableInfoAdapter.java
index 41b66c2..1b6ae41 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/adapter/TableInfoAdapter.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/adapter/TableInfoAdapter.java
@@ -5,6 +5,9 @@ import com.baomidou.mybatisplus.core.metadata.TableInfo;
 import com.github.yulichang.adapter.base.ITableInfoAdapter;
 import org.apache.ibatis.session.Configuration;
 
+import java.lang.reflect.Field;
+import java.util.function.Supplier;
+
 /**
  * @author yulichang
  * @since 1.4.3
@@ -35,4 +38,9 @@ public class TableInfoAdapter implements ITableInfoAdapter {
     public Configuration mpjGetConfiguration(TableInfo tableInfo) {
         return tableInfo.getConfiguration();
     }
+
+    @Override
+    public Field mpjGetField(TableFieldInfo fieldInfo, Supplier<Field> supplier) {
+        return fieldInfo.getField();
+    }
 }
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/method/UpdateJoin.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/method/UpdateJoin.java
index 021f2c2..aee7f04 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/method/UpdateJoin.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/method/UpdateJoin.java
@@ -38,7 +38,17 @@ public class UpdateJoin extends MPJAbstractMethod {
 
     @Override
     public String mpjConvertIfEwParam(String param, boolean newLine) {
-        return super.convertIfEwParam(param, newLine);
+        try {
+            return super.convertIfEwParam(param, newLine);
+        } catch (Throwable t) {
+            return convertIfEwParamOverride(param, newLine);
+        }
+    }
+
+
+    private String convertIfEwParamOverride(final String param, final boolean newLine) {
+        return SqlScriptUtils.convertIf(SqlScriptUtils.unSafeParam(param),
+                String.format("%s != null and %s != null", WRAPPER, param), newLine);
     }
 
     /**
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/method/UpdateJoinAndNull.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/method/UpdateJoinAndNull.java
index 477f8af..3796cb7 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/method/UpdateJoinAndNull.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/method/UpdateJoinAndNull.java
@@ -3,6 +3,7 @@ package com.github.yulichang.method;
 import com.baomidou.mybatisplus.annotation.FieldStrategy;
 import com.baomidou.mybatisplus.core.metadata.TableFieldInfo;
 import com.baomidou.mybatisplus.core.metadata.TableInfo;
+import com.baomidou.mybatisplus.core.toolkit.sql.SqlScriptUtils;
 import org.apache.ibatis.mapping.MappedStatement;
 import org.apache.ibatis.mapping.SqlSource;
 
@@ -35,7 +36,17 @@ public class UpdateJoinAndNull extends MPJAbstractMethod {
 
     @Override
     public String mpjConvertIfEwParam(String param, boolean newLine) {
-        return super.convertIfEwParam(param, newLine);
+        try {
+            return super.convertIfEwParam(param, newLine);
+        } catch (Throwable t) {
+            return convertIfEwParamOverride(param, newLine);
+        }
+    }
+
+
+    private String convertIfEwParamOverride(final String param, final boolean newLine) {
+        return SqlScriptUtils.convertIf(SqlScriptUtils.unSafeParam(param),
+                String.format("%s != null and %s != null", WRAPPER, param), newLine);
     }
 
     /**
diff --git a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/UpdateJoinWrapper.java b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/UpdateJoinWrapper.java
index 5ad6ce6..84628c3 100644
--- a/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/UpdateJoinWrapper.java
+++ b/mybatis-plus-join-core/src/main/java/com/github/yulichang/wrapper/UpdateJoinWrapper.java
@@ -15,6 +15,7 @@ import com.github.yulichang.wrapper.interfaces.Update;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 
+import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -206,7 +207,12 @@ public class UpdateJoinWrapper<T> extends MPJAbstractLambdaWrapper<T, UpdateJoin
                 }
                 Object val;
                 try {
-                    val = fieldInfo.getField().get(obj);
+                    Field field = AdapterHelper.getTableInfoAdapter().mpjGetField(fieldInfo, () -> {
+                        Field field1 = ReflectionKit.getFieldMap(obj.getClass()).get(fieldInfo.getProperty());
+                        field1.setAccessible(true);
+                        return field1;
+                    });
+                    val = field.get(obj);
                 } catch (IllegalAccessException e) {
                     throw new RuntimeException(e);
                 }