日志打印初步版本,暂未解决分页sql拼接问题.

mybatis-plus/src/main/java/com/baomidou/mybatisplus/plugins/SqlLogInterceptor.java

@@ -0,0 +1,104 @@
+package com.baomidou.mybatisplus.plugins;
+
+
+import org.apache.ibatis.executor.Executor;
+import org.apache.ibatis.logging.Log;
+import org.apache.ibatis.logging.LogFactory;
+import org.apache.ibatis.mapping.BoundSql;
+import org.apache.ibatis.mapping.MappedStatement;
+import org.apache.ibatis.mapping.ParameterMapping;
+import org.apache.ibatis.plugin.*;
+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 java.text.DateFormat;
+import java.util.Date;
+import java.util.List;
+import java.util.Locale;
+import java.util.Properties;
+
+/**
+ *  sql 日志打印
+ * Created by nieqiurong on 2017-02-09 09:07:58.
+ */
+@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 SqlLogInterceptor implements Interceptor {
+
+    private static final Log logger = LogFactory.getLog(SqlLogInterceptor.class);
+
+    private Properties properties;
+
+    @Override
+    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];
+        }
+        BoundSql boundSql = mappedStatement.getBoundSql(parameter);
+        Configuration configuration = mappedStatement.getConfiguration();
+        Object returnValue;
+        returnValue = invocation.proceed();
+        String sql = getSql(configuration, boundSql);
+        if(logger.isDebugEnabled()){
+            logger.debug("\n\n Run SQL: "+sql+"\n");
+        }
+        return returnValue;
+    }
+
+    private static String getParameterValue(Object obj) {
+        String value;
+        if (obj instanceof String) {
+            value = obj!=null ? "'" + obj.toString() + "'":"''";
+        } else if (obj instanceof Date) {
+            if(obj instanceof java.sql.Date){
+                value = obj!=null ? "'" + obj.toString() + "'":"''";
+            }else {
+                DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT, Locale.CHINA);
+                value = obj!=null ? "'" + formatter.format(obj) + "'":"''";
+            }
+        } else {
+            value = obj!=null ? obj.toString():"";
+        }
+        return value;
+    }
+
+    public static String getSql(Configuration configuration, BoundSql boundSql) {
+        Object parameterObject = boundSql.getParameterObject();
+        List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
+        String sql = boundSql.getSql().replaceAll("[\\s]+", " ");
+        if (parameterMappings!=null&&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;
+    }
+
+    @Override
+    public Object plugin(Object target) {
+        return Plugin.wrap(target, this);
+    }
+
+    @Override
+    public void setProperties(Properties properties) {
+        this.properties = properties;
+    }
+}