mybatis使用拦截器显示sql,使用druid配置连接信息

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mybatis使用拦截器显示sql,使用druid配置连接信息

mybatissqlDruid

1、显示出sql内容：

新建2个类：

MybatisInterceptor ；拦截sql，并获得输出sql内容

package com.cpp.core.filter;
import java.text.DateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Properties;

import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import org.apache.ibatis.type.TypeHandlerRegistry;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.cpp.core.common.utils.SQLFormatter;

@Intercepts({
@Signature(type = Executor.class, method = "update", args = { MappedStatement.class, Object.class }),
@Signature(type = Executor.class, method = "query", args = { MappedStatement.class, Object.class,
RowBounds.class, ResultHandler.class }) })
public class MybatisInterceptor implements Interceptor {
private static Logger logger = LoggerFactory.getLogger(MybatisInterceptor.class);
private Properties properties;

public Object intercept(Invocation invocation) throws Throwable {
MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
Object parameter = null;
if (invocation.getArgs().length > 1) {
parameter = invocation.getArgs()[1];
}
String sqlId = mappedStatement.getId();
BoundSql boundSql = mappedStatement.getBoundSql(parameter);
Configuration configuration = mappedStatement.getConfiguration();
Object returnValue = null;
long start = System.currentTimeMillis();
returnValue = invocation.proceed();
long end = System.currentTimeMillis();
long time = (end - start);
if (time > 1) {
String sql = getSql(configuration, boundSql, sqlId, time);
logger.info("调用的java方法为：\n "+sql.split(":")[0]);
logger.info("查询sql语句为：\n"+SQLFormatter.format(sql.split(":")[1])  +"\n"+"sql语句执行的时间："+time+"\n\n");
}
return returnValue;
}

public static String getSql(Configuration configuration, BoundSql boundSql, String sqlId, long time) {
String sql = showSql(configuration, boundSql);
StringBuilder str = new StringBuilder(100);
str.append(sqlId);
str.append(":");
str.append(sql);
str.append(":");
str.append(time);
str.append("ms");
return str.toString();
}

private static String getParameterValue(Object obj) {
String value = null;
if (obj instanceof String) {
value = "'" + obj.toString() + "'";
} else if (obj instanceof Date) {
DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT, Locale.CHINA);
value = "'" + formatter.format(new Date()) + "'";
} else {
if (obj != null) {
value = obj.toString();
} else {
value = "";
}

}
return value;
}

public static String showSql(Configuration configuration, BoundSql boundSql) {
Object parameterObject = boundSql.getParameterObject();
List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
String sql = boundSql.getSql().replaceAll("[\\s]+", " ");
if (parameterMappings.size() > 0 && parameterObject != null) {
TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
sql = sql.replaceFirst("\\?", getParameterValue(parameterObject));

} else {
MetaObject metaObject = configuration.newMetaObject(parameterObject);
for (ParameterMapping parameterMapping : parameterMappings) {
String propertyName = parameterMapping.getProperty();
if (metaObject.hasGetter(propertyName)) {
Object obj = metaObject.getValue(propertyName);
sql = sql.replaceFirst("\\?", getParameterValue(obj));
} else if (boundSql.hasAdditionalParameter(propertyName)) {
Object obj = boundSql.getAdditionalParameter(propertyName);
sql = sql.replaceFirst("\\?", getParameterValue(obj));
}
}
}
}
return sql;
}

public Object plugin(Object target) {
return Plugin.wrap(target, this);
}

public void setProperties(Properties properties0) {
this.properties = properties0;
}
}

2、在新建sql格式化工具，格式化sql语句

package com.cpp.core.filter;
import java.util.Properties;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
@Intercepts({
@Signature(type = Executor.class, method = "update", args = { MappedStatement.class, Object.class }),
@Signature(type = Executor.class, method = "query", args = { MappedStatement.class, Object.class,
RowBounds.class, ResultHandler.class }) })
public class SqlStatementInterceptor implements Interceptor{
private Properties properties;
@Override
public Object intercept(Invocation invocation) throws Throwable {
System.out.println("test");
return invocation.proceed();
}
@Override
public Object plugin(Object target) {
return Plugin.wrap(target, this);
}
@Override
public void setProperties(Properties properties0) {
this.properties = properties0;
}
}

3、在spring的配置文件中添加

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描entity目录, 省掉Configuration.xml里的手工配置 -->
<property name="typeAliasesPackage" value="com.cpp.core" />
<!-- 显式指定Mapper文件位置 -->
<property name="mapperLocations" value="classpath:/mybatis/*/*Mapper.xml" />
<property name="plugins">
<array>
<ref bean="paginationInterceptor"/>
<ref bean="sqlStatementInterceptor"/>
</array>
</property>
<property name="configurationProperties">
<props>
<prop key="dialect">mysql</prop>
</props>
</property>
</bean>

配置插件

<ref bean="sqlStatementInterceptor"/>

配置注入的内容

<bean id="sqlStatementInterceptor" class="com.cpp.core.filter.MybatisInterceptor"></bean>

2、如果使用的是Druid来连接的数据库

在web.xml文件中添加下面的信息

<servlet>
<servlet-name>DruidStatView</servlet-name>
<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DruidStatView</servlet-name>
<url-pattern>/druid/*</url-pattern>
</servlet-mapping>

可以通过web的访问的形式进行访问页面：输入：

http://dev.eop.zhc360.com:8080/cpp-middleman-api/druid/sql.html

就可以查看到输出的sql语句了