https://blog.csdn.net/qq_38428623/article/details/103981432
package com.jh.erp.web.interceptor;
import com.jh.erp.service.model.UserInfo;
import com.jh.erp.service.util.UserInfoUtils;
import org.apache.ibatis.binding.MapperMethod;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlCommandType;
import org.apache.ibatis.plugin.*;
import java.lang.reflect.Field;
import java.util.Date;
import java.util.Properties;
import java.util.UUID;
/**
* @ProductName: IntelliJ IDEA
* @ProjectName: erp-parent
* @PackageName: com.jh.erp.web.interceptor
* @Author: Choj
* @CreateDateTime: 2020/1/14 20:32
* @ModifyDateTime:
* @Name: UserUpdateInterceptor
* @Description: 用于赋值用户信息的拦截器
* Executor
* StatementHandler
* ParameterHandler
* ResultSetHandler
* @Since: 1.0
**/
@Intercepts({@Signature(type = Executor.class, method = "update"
, args = {MappedStatement.class, Object.class})})
public class UserUpdateInterceptor implements Interceptor {
@Override
public Object intercept(final Invocation invocation) throws Exception {
Object obj = null;
if (invocation.getTarget() instanceof Executor && invocation.getArgs().length == 2) {
final Executor executor = (Executor) invocation.getTarget();
// 获取第一个参数
final MappedStatement ms = (MappedStatement) invocation.getArgs()[0];
final Object paramObj = invocation.getArgs()[1];
if (ms.getSqlCommandType() == SqlCommandType.INSERT) {
obj = this.executeInsert(executor, ms, paramObj);
} else if (ms.getSqlCommandType() == SqlCommandType.UPDATE) {
obj = this.executeUpdate(executor, ms, paramObj);
} else if (ms.getSqlCommandType() == SqlCommandType.DELETE) {
obj = this.executeDelete(executor, ms, paramObj);
}
}
return obj == null ? invocation.proceed() : obj;
}
@Override
public Object plugin(final Object target) {
return Plugin.wrap(target, this);
}
@Override
public void setProperties(final Properties properties) {
}
// ------ 私有方法 --------
/**
* 更新操作
*
* @param executor executor
* @param ms ms
* @param paramObj 参数
* @return 返回执行结果
*/
private Object executeInsert(final Executor executor, final MappedStatement ms, final Object paramObj) throws Exception {
final Field[] fields = paramObj.getClass().getDeclaredFields();
for (final Field field : fields) {
field.setAccessible(true);
final String fieldName = field.getName();
if ("id".equalsIgnoreCase(fieldName)) {
field.set(paramObj, UUID.randomUUID().toString());
continue;
}
final UserInfo userInfo = this.getUserInfo();
if (userInfo == null) {
return null;
}
switch (fieldName) {
case "id":
field.set(paramObj, UUID.randomUUID().toString());
break;
case "createUserId":
field.set(paramObj, userInfo.getId());
break;
case "createUserCode":
field.set(paramObj, userInfo.getCode());
break;
case "createUserName":
field.set(paramObj, userInfo.getUsername());
break;
default:
break;
}
}
return executor.update(ms, paramObj);
}
/**
* 新增操作
*
* @param executor executor
* @param ms ms
* @param paramObj 参数
* @return 返回执行结果
*/
private Object executeUpdate(final Executor executor, final MappedStatement ms, final Object paramObj) throws Exception {
if (paramObj instanceof MapperMethod.ParamMap) {
final MapperMethod.ParamMap paramMap = (MapperMethod.ParamMap) paramObj;
for (final Object entity : paramMap.entrySet()) {
final Field[] fields = entity.getClass().getDeclaredFields();
for (final Field field : fields) {
field.setAccessible(true);
final String fieldName = field.getName();
final UserInfo userInfo = this.getUserInfo();
if (userInfo == null) {
return null;
}
switch (fieldName) {
case "modifyDate":
field.set(paramObj, new Date());
break;
case "modifyUserId":
field.set(paramObj, userInfo.getId());
break;
case "modifyUserCode":
field.set(paramObj, userInfo.getCode());
break;
case "modifyUserName":
field.set(paramObj, userInfo.getUsername());
break;
default:
break;
}
}
}
}
return executor.update(ms, paramObj);
}
/**
* 新增操作
*
* @param executor executor
* @param ms ms
* @param paramObj 参数
* @return 返回执行结果
*/
private Object executeDelete(final Executor executor, final MappedStatement ms, final Object paramObj) throws Exception {
final Field[] fields = paramObj.getClass().getDeclaredFields();
for (final Field field : fields) {
field.setAccessible(true);
final String fieldName = field.getName();
switch (fieldName) {
case "deleted":
field.set(paramObj, true);
break;
default:
break;
}
}
return executor.update(ms, paramObj);
}
/**
* 获取用户信息
*
* @return 返回用户信息
*/
private UserInfo getUserInfo() {
UserInfo userInfo = null;
try {
userInfo = UserInfoUtils.getUserInfo();
} catch (final Exception ex) {
}
if (userInfo == null) {
return null;
}
return userInfo;
}
}