diff --git a/src/main/java/xyz/wbsite/wsqlite/ObjectClient.java b/src/main/java/xyz/wbsite/wsqlite/ObjectClient.java
index 3aa10a9..069b8ca 100644
--- a/src/main/java/xyz/wbsite/wsqlite/ObjectClient.java
+++ b/src/main/java/xyz/wbsite/wsqlite/ObjectClient.java
@@ -195,7 +195,7 @@ public class ObjectClient extends Client {
         return 0;
     }
 
-    public <T> List<T> select(Class<T> poClass, int pageNumber, int pageSize, String... wheres) throws SQLException, ClassNotFoundException {
+    public <T> List<T> select(Class<T> poClass, int pageNumber, int pageSize, T po, String... wheres) throws SQLException, ClassNotFoundException {
         ArrayList<T> list = new ArrayList<>();
         try {
             Class aClass = classMap.get(poClass.getName());
@@ -207,6 +207,8 @@ public class ObjectClient extends Client {
 
                 //获取字段列表
                 List<Field> fs = getFields(poClass);
+                List<String> poWhere = new ArrayList();
+                List<Object> args = new ArrayList();
 
                 for (int i = 0; i < fs.size(); i++) {
                     Field f = fs.get(i);
@@ -214,15 +216,23 @@ public class ObjectClient extends Client {
                     if (i != fs.size() - 1) {
                         sql.append(",");
                     }
+                    if (po != null) {
+                        if (f.get(po) != null) {
+                            poWhere.add(" " + f.getName().toUpperCase() + " = ? ");
+                            args.add(f.get(po));
+                        }
+                    }
                 }
 
                 sql.append(" FROM ");
                 sql.append(aClass.getSimpleName());
 
+                poWhere.addAll(Arrays.asList(wheres));
+
                 //条件参数
-                if (wheres.length > 0) {
+                if (poWhere.size() + wheres.length > 0) {
                     sql.append(" WHERE ");
-                    for (int i = 0; i < wheres.length; i++) {
+                    for (int i = 0; i < poWhere.size(); i++) {
                         String where = wheres[i];
                         sql.append(where);
                         sql.append(i != wheres.length - 1 ? " AND " : "");
@@ -230,13 +240,15 @@ public class ObjectClient extends Client {
                 }
 
                 //分页参数
-                if(pageSize > 0){
+                if (pageSize > 0) {
                     sql.append(" LIMIT " + (pageNumber - 1) + "," + pageSize);
                 }
 
                 System.out.println("SQL ==> " + sql.toString());
-                list.addAll(executeQuery(sql.toString(), poClass));
+                list.addAll(executeQuery(poClass, sql.toString(), args));
             }
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
         } finally {
             destroyed();
         }
@@ -252,10 +264,10 @@ public class ObjectClient extends Client {
      * @throws SQLException
      * @throws ClassNotFoundException
      */
-    public <T> List<T> executeQuery(String sql, Class<T> poClass) throws SQLException, ClassNotFoundException {
+    public <T> List<T> executeQuery(Class<T> poClass, String sql, Object... args) throws SQLException, ClassNotFoundException {
         List<T> rsList = new ArrayList<T>();
         try {
-            resultSet = executeQuery(sql);
+            resultSet = executeQuery(sql, args);
 
             //获取字段列表
             List<Field> fs = getFields(poClass);
diff --git a/src/main/java/xyz/wbsite/wsqlite/Where.java b/src/main/java/xyz/wbsite/wsqlite/Where.java
new file mode 100644
index 0000000..c600411
--- /dev/null
+++ b/src/main/java/xyz/wbsite/wsqlite/Where.java
@@ -0,0 +1,35 @@
+package xyz.wbsite.wsqlite;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Where {
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+        private StringBuilder sb = new StringBuilder();
+        private List<Object> args = new ArrayList<>();
+
+        public Builder eq(boolean condition,String name, Object value) {
+            if (condition){
+                sb.append(name).append("=? ");
+            }
+
+            return this;
+        }
+
+        public Builder like(boolean condition,String name, Object value) {
+
+            return this;
+        }
+
+        public Builder isNull(boolean condition,String name, Object value) {
+
+            return this;
+        }
+
+    }
+}