diff --git a/README.md b/README.md
index 1348e2b..90005e2 100644
--- a/README.md
+++ b/README.md
@@ -314,7 +314,7 @@ WHERE ( regexp_like(p.code,'^[0-9]+$'))
 
 结果：
 
-```json
+```sql
 SELECT p.id, p.code, p.name, p.price
 FROM Product p
 WHERE (p.name LIKE '%双11%')
@@ -350,21 +350,74 @@ GROUP BY p.name
 
 目前允许的函数没有进行控制，所有的单一参数的函数都可以使用。
 
+单表查询的内容基本介绍完了，接下来是多表查询。
 
+现在有两张表，零售表`m_retail`，零售的店铺`m_retail.c_store_id`外键关联到`c_store`表。
 
+第一种是使用`id@`
 
+```json
+{
+  "m_retail:r":{
+      "@column":"id,docno",
+      "id": 18
+    },
+  "c_store:s":{
+    "id@":"/r/c_store_id",
+    "@column":"code,name"
+  }
+}
+```
 
-单表查询的内容基本介绍完了。
+结果：
 
-接下来是多表查询，后续文档内容敬请期待。
+```sql
+SELECT r.id, r.docno, s.code as "s.code", s.name as "s.name"
+FROM m_retail r, c_store s
+WHERE (r.id = 18 AND r.c_store_id = s.id)
+```
 
+如果不使用`id@`
 
+```json
+{
+    "[]": {
+        "c_store": {
+            "@column": "code,name",
+            "code": "C86L"
+        },
+        "m_retail:r": {
+            "@column": "id,docno"
+        }
+    },
+    "join": {
+        "@innerJoin": [
+            "c_store.id=r.c_store_id"
+        ]
+    }
+}
+```
+
+结果:
 
+```sql
+SELECT r.id, r.docno, c_store.code, c_store.name
+FROM m_retail r
+INNER JOIN c_store ON c_store.id=r.c_store_id
+WHERE (c_store.code = 'C86L')
+```
 
 
 
+其他几种join的使用方法和这里演示的innerJoin是一样的。 
 
+现在支持的join有：
 
+@innerJoin
+@leftOuterJoin
+@rightOuterJoin
+@join
+@outerJoin 
 
 
 
diff --git a/src/main/java/zuo/biao/apijson/parser/APIJSONProvider.java b/src/main/java/zuo/biao/apijson/parser/APIJSONProvider.java
index 83ed32e..dd55655 100644
--- a/src/main/java/zuo/biao/apijson/parser/APIJSONProvider.java
+++ b/src/main/java/zuo/biao/apijson/parser/APIJSONProvider.java
@@ -12,6 +12,8 @@ public class APIJSONProvider extends AbstractProvider {
 	private final String ALIAS_SPLIT = ":";
 	private static final String AND = " AND ";
 	private static final String OR = " OR ";
+	private final String q = "\"";
+	private boolean isWrap = false;
 
 	private List<String> tableWhiteList = new ArrayList<String>();
 	private List<String> tableBlackList = new ArrayList<String>();
@@ -61,7 +63,7 @@ public List<String> getTables() {
 		Set<String> tableNames = request.keySet();
 		String tableAliasName;
 		String tableRealName;
-		for(String tableName : tableNames) {
+		out:for(String tableName : tableNames) {
 			if(!tableName.matches("(\\w+(:\\w+)?)")) {
 				error("表" + tableName + "格式不符合" );
 				return null;
@@ -74,6 +76,19 @@ public List<String> getTables() {
 			}else {
 				tableRealName = tableAliasName = tableName;
 			}
+			if(join != null) {
+				String[] checkJoin = {"@innerJoin","@leftOuterJoin","@rightOuterJoin","@join","@outerJoin"};
+				for(String joinKey : checkJoin) {
+					JSONArray array = join.getJSONArray(joinKey);
+					if(array != null && array.size() != 0) {
+						for(Object obj : array) {
+							if(obj instanceof String && (((String)obj).startsWith(tableRealName) || ((String)obj).startsWith(tableAliasName))) {
+								continue out;
+							}
+						}
+					}
+				}
+			}
 			validateTable(tableRealName);
 			list.add(tableRealName + " " + tableAliasName);
 		}
@@ -151,18 +166,27 @@ public List<String> getSelect() {
 								String columnRealName =  functionStrs[1];
 								String columnAliasName = columnName.split(ALIAS_SPLIT)[1];
 								validateColumn(tableRealName,columnRealName);
+								if(propertis.getString("id@") != null)
+									columnAliasName = wrapColumn(tableAliasName, columnAliasName);
 								list.add(funcitonName + "(" + tableAliasName + "." + columnRealName + ")" + " as " + columnAliasName);
 							}else {
 								//没函数的字段
 								String columnRealName = functionOrColumn ;
 								String columnAliasName = columnName.split(ALIAS_SPLIT)[1];
 								validateColumn(tableRealName,columnRealName);
+								if(propertis.getString("id@") != null)
+									columnAliasName = wrapColumn(tableAliasName, columnAliasName);
 								list.add(tableAliasName + "." + columnRealName + " as " + columnAliasName);
 							}
 						}else {
 							//使用tableAliasName.columnName类型
 							validateColumn(tableRealName,columnName);
-							list.add(tableAliasName + "." + columnName);
+							if(propertis.getString("id@") != null) {
+								String columnAliasName = wrapColumn(tableAliasName, columnName);
+								list.add(tableAliasName + "." + columnName + " as " + columnAliasName);
+							}else {								
+								list.add(tableAliasName + "." + columnName);
+							}
 						}
 					}
 				}
@@ -171,6 +195,9 @@ public List<String> getSelect() {
 		}
 		return list;
 	}
+	private String wrapColumn(String tableAliasName, String columnAliasName) {
+		return isWrap? q + tableAliasName + "." + columnAliasName + q : q +  columnAliasName + q;
+	}
 	/**
 	 * 解析请求中的过滤条件
 	 * 支持以下模式：
@@ -520,7 +547,7 @@ public List<String> getOuterJoin() {
 		List<String> list = new ArrayList<>();
 		if(getStatementType() == StatementType.SELECT) {
 			if(join != null && join.get("@outerJoin")!=null) {
-				JSONArray stms = join.getJSONArray("@join");
+				JSONArray stms = join.getJSONArray("@outerJoin");
 				for(int i = 0; i < stms.size(); i++) {
 					
 					Object obj = stms.get(i);
@@ -872,4 +899,12 @@ public List<String> getColumnBlackList() {
 	public void setColumnBlackList(List<String> columnBlackList) {
 		this.columnBlackList = columnBlackList;
 	}
+	public boolean isWrap() {
+		return isWrap;
+	}
+	public void setWrap(boolean isWrap) {
+		this.isWrap = isWrap;
+	}
+	
+	
 }
diff --git a/src/main/java/zuo/biao/apijson/parser/App.java b/src/main/java/zuo/biao/apijson/parser/App.java
index 06c74db..c45c8e7 100644
--- a/src/main/java/zuo/biao/apijson/parser/App.java
+++ b/src/main/java/zuo/biao/apijson/parser/App.java
@@ -14,12 +14,22 @@ public static void main( String[] args ) throws SQLProviderException
     {
     	long st = System.currentTimeMillis();
 		String json = "{\r\n" + 
-				"    \"Product:p\":{\r\n" + 
-				"        \"@column\":\"name,max(price):max_price\",\r\n" + 
-				"        \"name~\": \"双11\",\r\n" + 
-				"        \"@group\": \"name\"\r\n" + 
+				"    \"[]\": {\r\n" + 
+				"        \"c_store\": {\r\n" + 
+				"            \"@column\": \"code,name\",\r\n" + 
+				"            \"code\": \"C86L\"\r\n" + 
+				"        },\r\n" + 
+				"        \"m_retail:r\": {\r\n" + 
+				"            \"@column\": \"id,docno\"\r\n" + 
+				"        }\r\n" + 
+				"    },\r\n" + 
+				"    \"join\": {\r\n" + 
+				"        \"@innerJoin\": [\r\n" + 
+				"            \"c_store.id=r.c_store_id\"\r\n" + 
+				"        ]\r\n" + 
 				"    }\r\n" + 
 				"}";
+		System.out.println(json);
 		JSONObject req = JSONObject.parseObject(json);
 		long fastJsonet = System.currentTimeMillis();
 		//JSON解析太耗时了174ms
diff --git a/target/classes/META-INF/maven/APIJSONParser/APIJSONParser/pom.properties b/target/classes/META-INF/maven/APIJSONParser/APIJSONParser/pom.properties
index b28d1ab..646310f 100644
--- a/target/classes/META-INF/maven/APIJSONParser/APIJSONParser/pom.properties
+++ b/target/classes/META-INF/maven/APIJSONParser/APIJSONParser/pom.properties
@@ -1,5 +1,5 @@
 #Generated by Maven Integration for Eclipse
-#Tue Dec 25 10:09:51 CST 2018
+#Wed Jan 16 11:59:18 CST 2019
 version=0.0.1-SNAPSHOT
 groupId=APIJSONParser
 m2e.projectName=APIJSONParser
diff --git a/target/classes/zuo/biao/apijson/parser/APIJSONProvider.class b/target/classes/zuo/biao/apijson/parser/APIJSONProvider.class
index 6345296..417bd28 100644
Binary files a/target/classes/zuo/biao/apijson/parser/APIJSONProvider.class and b/target/classes/zuo/biao/apijson/parser/APIJSONProvider.class differ
diff --git a/target/classes/zuo/biao/apijson/parser/App.class b/target/classes/zuo/biao/apijson/parser/App.class
index 64ddeda..eec3c2b 100644
Binary files a/target/classes/zuo/biao/apijson/parser/App.class and b/target/classes/zuo/biao/apijson/parser/App.class differ