本篇内容介绍了“Mybatis拦截器打印sql问题怎么解决”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
1.log4j2配置修改
关闭log4j2打印mybatis的sql配置，如果本来就没开启，那不需要。
2.配置日志开关
在springboot的yml文件配置变量logging.sql.enable=true，对拦截器做开关控制。
3.添加拦截器插件
// 采用自定义拦截器打印sql日志
sessionFactory.setPlugins(new Interceptor[]{this.getSqlLogInterceptor()});4.拦截器逻辑描述
4.1 注入开关
@Value("${logging.sql.enable:true}")
private Boolean sqlEnable;4.2 获取sql
Object target = invocation.getTarget(); StatementHandler statementHandler = (StatementHandler) target; //获取绑定的SQL对象 BoundSql boundSql = statementHandler.getBoundSql(); //得到需要执行的sql语句，并进行格式 String sql = boundSql.getSql();
4.2 获取参数
//需要绑定的参数映射对象 List<ParameterMapping> parameterMappingList = boundSql.getParameterMappings();
4.3 sql替换参数
public String buidSql(String sql,Object[] parameters) {
if (parameters == null || sql == null) {
return "";
}
List<Object> parametersArray = Arrays.asList(parameters);
List<Object> list = new ArrayList<Object>(parametersArray);
while (sql.indexOf("?") != -1 && list.size() > 0 && parameters.length > 0) {
Object obj = list.get(0);
if(null!=obj && obj instanceof String){
sql = sql.replaceFirst("\?", "'"+obj.toString()+"'");
}else if(null!=obj){
sql = sql.replaceFirst("\?", obj.toString());
}
list.remove(0);
}
return sql.replaceAll("(
?
(\s*
?
)+)", "
");
}4.4 打印sql
log.debug(String.format(
"
########################### Sql Start ###########################" +
"
StartTime : %s" +
"
ExecuteID : %s" +
"
ExecuteSQL : %s" +
"
ExecuteTime : %s ms" +
"
########################### Sql End ###########################
"
,startTimeStr,executeID,this.buidSql(sql,args.toString().split(",")),exeTime));4.5打印效果
拦截器完整代码
package com.cloudpaas.plugin.mybatis.interceptor;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.executor.statement.StatementHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.mapping.ParameterMode;
import org.apache.ibatis.plugin.*;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.reflection.SystemMetaObject;
import org.apache.ibatis.scripting.defaults.DefaultParameterHandler;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.type.TypeHandlerRegistry;
import org.springframework.beans.factory.annotation.Value;
import java.lang.reflect.Field;
import java.sql.Statement;
import java.text.SimpleDateFormat;
import java.util.*;
@Intercepts({
@Signature(type = StatementHandler.class, method = "query", args = {Statement.class, ResultHandler.class}),
@Signature(type = StatementHandler.class, method = "update", args = {Statement.class}),
@Signature(type = StatementHandler.class, method = "batch", args = { Statement.class })
})
@Slf4j
public class SqlLogInterceptor implements Interceptor {
private SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
@Value("${logging.sql.enable:true}")
private Boolean sqlEnable;
@Override
public Object intercept(Invocation invocation) throws Throwable {
if(!sqlEnable){
return invocation.proceed();
}
Object target = invocation.getTarget();
MetaObject mObject = SystemMetaObject.forObject(invocation.getTarget());
MappedStatement mappedStatement = (MappedStatement)mObject.getValue("delegate.mappedStatement");
// 执行的mapper statement ID
String executeID = mappedStatement.getId();
//获取当前的开始时间戳
long startTime = System.currentTimeMillis();
//记录当前时间
String startTimeStr=sdf.format(new Date());
StatementHandler statementHandler = (StatementHandler) target;
try {
return invocation.proceed();
} finally {
long endTime = System.currentTimeMillis();
//sql的执行的时间
long exeTime = endTime - startTime;
try{
//获取绑定的SQL对象
BoundSql boundSql = statementHandler.getBoundSql();
//得到需要执行的sql语句，并进行格式
String sql = boundSql.getSql();
sql=formatSql(sql);
//得到默认的参数处理器
DefaultParameterHandler dph=(DefaultParameterHandler)statementHandler.getParameterHandler();
//利用反射机制，从DefaultParameterHandler获取Configuration和TypeHandlerRegistry
Field configurationField=dph.getClass().getDeclaredField("configuration");
Field typeHandlerRegistryField=dph.getClass().getDeclaredField("typeHandlerRegistry");
//设置私有属性可访问
configurationField.setAccessible(true);
//设置私有属性可访问
typeHandlerRegistryField.setAccessible(true);
Configuration configuration=(Configuration) configurationField.get(dph);
TypeHandlerRegistry typeHandlerRegistry=(TypeHandlerRegistry) typeHandlerRegistryField.get(dph);
//sql的参数对象
Object parameterObject = boundSql.getParameterObject();
//需要绑定的参数映射对象
List<ParameterMapping> parameterMappingList = boundSql.getParameterMappings();
//处理sql的参数，该部分参考的是DefaultParameterHandler中setParameters方法中的实现
StringBuffer args=new StringBuffer();
if(parameterMappingList!=null && parameterMappingList.size()>0){
for(ParameterMapping parameterMapping:parameterMappingList){
//如果该参数不是输出参数，则进行处理
if (parameterMapping.getMode() != ParameterMode.OUT) {
Object value;
//参数的名字，属性
String propertyName = parameterMapping.getProperty();
//先从附加的，主要是list、array等的处理
if (boundSql.hasAdditionalParameter(propertyName)) {
value = boundSql.getAdditionalParameter(propertyName);
} else if (parameterObject == null) {
value = null;
} else if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
//typeHandlerRegistry注册了某个类的处理
value = parameterObject;
} else {
//默认的MetaObject 的处理，根据参数获取值
MetaObject metaObject = configuration.newMetaObject(parameterObject);
value = metaObject.getValue(propertyName);
}
if(value!=null){
if(value instanceof Date){
//如果是日期，则格式化一下
value=sdf.format(value);
}
}
args.append(",").append(value);
}
}
//删除第一个逗号
args.deleteCharAt(0);
}
log.debug(String.format(
"
########################### Sql Start ###########################" +
"
StartTime : %s" +
"
ExecuteID : %s" +
"
ExecuteSQL : %s" +
"
ExecuteTime : %s ms" +
"
########################### Sql End ###########################
"
,startTimeStr,executeID,this.buidSql(sql,args.toString().split(",")),exeTime));
}catch(Exception e){
}
}
}
@Override
public Object plugin(Object target) {
return Plugin.wrap(target, this);
}
@Override
public void setProperties(Properties properties) {
}
private String formatSql(String sql) {
// 输入sql字符串空判断
if (sql == null || sql.length() == 0) {
return "";
}
//格式sql 将回车换行制表符等替换成空，在将连续多个空格替换成1个空格，然后在去掉左右括号两边的空格，在去掉逗号左右两个的空格
return sql.replaceAll("[\t\n\x0B\f\r]", "").replaceAll(" +", " ")
.replaceAll(" *\( *", "(").replaceAll(" *\) *", ")").replaceAll(" *, *", ",");
}
public String buidSql(String sql,Object[] parameters) {
if (parameters == null || sql == null) {
return "";
}
List<Object> parametersArray = Arrays.asList(parameters);
List<Object> list = new ArrayList<Object>(parametersArray);
while (sql.indexOf("?") != -1 && list.size() > 0 && parameters.length > 0) {
Object obj = list.get(0);
if(null!=obj && obj instanceof String){
sql = sql.replaceFirst("\?", "'"+obj.toString()+"'");
}else if(null!=obj){
sql = sql.replaceFirst("\?", obj.toString());
}
list.remove(0);
}
return sql.replaceAll("(
?
(\s*
?
)+)", "
");
}
}