优化改版

src/main/java/xyz/wbsite/wsqlite/ObjectClient.java

@@ -123,7 +123,7 @@ public class ObjectClient extends Client {
         return 0;
     }
 
-    public <T> int delete(Class<T> poClass, String... wheres) throws SQLException, ClassNotFoundException {
+    public <T> int delete(Class<T> poClass, Where where) throws SQLException, ClassNotFoundException {
         try {
             Class aClass = classMap.get(poClass.getName());
             if (aClass == null) {
@@ -132,16 +132,9 @@ public class ObjectClient extends Client {
                 StringBuffer sql = new StringBuffer();
                 sql.append("DELETE FROM ");
                 sql.append(aClass.getSimpleName());
-
+                sql.append(where.getSql());
-                if (wheres.length > 0) {
+                System.out.println("SQL ==> " + sql.toString());
-                    sql.append(" WHERE ");
+                return executeUpdate(sql.toString(), where.getArgs());
-                    for (int i = 0; i < wheres.length; i++) {
-                        String where = wheres[i];
-                        sql.append(where);
-                        sql.append(i != wheres.length - 1 ? " AND " : "");
-                    }
-                }
-                return executeUpdate(sql.toString());
             }
         } finally {
             destroyed();
@@ -149,7 +142,7 @@ public class ObjectClient extends Client {
         return 0;
     }
 
-    public <T> int update(Class<T> poClass, T po, String... wheres) throws SQLException, ClassNotFoundException {
+    public <T> int update(Class<T> poClass, T po, Where where) throws SQLException, ClassNotFoundException {
         try {
             Class aClass = classMap.get(poClass.getName());
             if (aClass == null) {
@@ -175,17 +168,11 @@ public class ObjectClient extends Client {
                     }
                 }
 
-                if (wheres.length > 0) {
+                // 条件
-                    sql.append(" WHERE ");
+                sql.append(where.getSql());
-                    for (int i = 0; i < wheres.length; i++) {
-                        String where = wheres[i];
-                        sql.append(where);
-                        sql.append(i != wheres.length - 1 ? " AND " : "");
-                    }
-                }
 
                 System.out.println("SQL ==> " + sql.toString());
-                return executeUpdate(sql.toString(), values);
+                return executeUpdate(sql.toString(), concat(values, where.getArgs()));
             }
         } catch (IllegalAccessException e) {
             e.printStackTrace();
@@ -195,7 +182,7 @@ public class ObjectClient extends Client {
         return 0;
     }
 
-    public <T> List<T> select(Class<T> poClass, int pageNumber, int pageSize, T po, String... wheres) throws SQLException, ClassNotFoundException {
+    public <T> List<T> select(Class<T> poClass, Where where, int pageNumber, int pageSize) throws SQLException, ClassNotFoundException {
         ArrayList<T> list = new ArrayList<>();
         try {
             Class aClass = classMap.get(poClass.getName());
@@ -207,8 +194,6 @@ 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);
@@ -216,28 +201,13 @@ 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
-
+                sql.append(where.getSql());
-                //条件参数
-                if (poWhere.size() + wheres.length > 0) {
-                    sql.append(" WHERE ");
-                    for (int i = 0; i < poWhere.size(); i++) {
-                        String where = wheres[i];
-                        sql.append(where);
-                        sql.append(i != wheres.length - 1 ? " AND " : "");
-                    }
-                }
 
                 //分页参数
                 if (pageSize > 0) {
@@ -245,10 +215,8 @@ public class ObjectClient extends Client {
                 }
 
                 System.out.println("SQL ==> " + sql.toString());
-                list.addAll(executeQuery(poClass, sql.toString(), args));
+                list.addAll(executeQuery(poClass, sql.toString(), where.getArgs()));
             }
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
         } finally {
             destroyed();
         }
@@ -339,4 +307,11 @@ public class ObjectClient extends Client {
         }
         return fs;
     }
+
+    private <T> T[] concat(T[] arr1, T[] arr2) {
+        List<T> temp = new ArrayList<>();
+        temp.addAll(Arrays.asList(arr1));
+        temp.addAll(Arrays.asList(arr2));
+        return (T[]) temp.toArray();
+    }
 }

src/main/java/xyz/wbsite/wsqlite/Where.java

@@ -4,6 +4,32 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class Where {
+    private String sql;
+    private Object[] args;
+
+    private Where() {
+    }
+
+    public String getSql() {
+        return sql;
+    }
+
+    public void setSql(String sql) {
+        this.sql = sql;
+    }
+
+    public Object[] getArgs() {
+        return args;
+    }
+
+    public void setArgs(Object[] args) {
+        this.args = args;
+    }
+
+    public Where(String sql, Object[] args) {
+        this.sql = sql;
+        this.args = args;
+    }
 
     public static Builder builder() {
         return new Builder();
@@ -11,25 +37,58 @@ public class Where {
 
     public static class Builder {
         private StringBuilder sb = new StringBuilder();
-        private List<Object> args = new ArrayList<>();
+        private List<Object> argsList = new ArrayList<>();
+
+        public Builder eq(String name, Object value) {
+            return eq(true, name, value);
+        }
+
+        public Builder like(String name, Object value) {
+            return like(true, name, value);
+        }
+
+        public Builder isNull(String name, Object value) {
+            return isNull(true, name, value);
+        }
+
+        public Builder isNotNull(String name, Object value) {
+            return isNotNull(true, name, value);
+        }
 
         public Builder eq(boolean condition, String name, Object value) {
             if (condition) {
-                sb.append(name).append("=? ");
+                sb.append(sb.length() > 0 ? " and " : " where ").append(name).append(" = ? ");
+                argsList.add(value);
             }
-
             return this;
         }
 
         public Builder like(boolean condition, String name, Object value) {
-
+            if (condition) {
+                sb.append(sb.length() > 0 ? " and  " : " where ").append(name).append("like ?");
+                argsList.add(value);
+            }
             return this;
         }
 
         public Builder isNull(boolean condition, String name, Object value) {
+            if (condition) {
+                sb.append(sb.length() > 0 ? " and " : " where ").append(name).append("is null");
+                argsList.add(value);
+            }
+            return this;
+        }
 
+        public Builder isNotNull(boolean condition, String name, Object value) {
+            if (condition) {
+                sb.append(sb.length() > 0 ? " and " : " where ").append(name).append("is not null");
+                argsList.add(value);
+            }
             return this;
         }
 
+        public Where build() {
+            return new Where(sb.toString(), argsList.toArray());
+        }
     }
 }

src/test/java/WsqliteTest.java

@@ -1,4 +1,5 @@
 import xyz.wbsite.wsqlite.ObjectClient;
+import xyz.wbsite.wsqlite.Where;
 import xyz.wbsite.wsqlite.entity.Example;
 
 import java.io.File;
@@ -29,7 +30,8 @@ public class WsqliteTest {
             h.insert(Example.class, example);
 
             System.out.println("测试 select");
-            List<Example> select = h.select(Example.class, 1, 10);
+            Where where = Where.builder().eq("S", "wangbing").build();
+            List<Example> select = h.select(Example.class, where, 1, 10);
             System.out.println(select.size());
 
             System.out.println("测试 update");
@@ -43,11 +45,12 @@ public class WsqliteTest {
             example.setF1(0.1f);
             example.setD1(0.1);
             example.setDate(new Date());
-            int update = h.update(Example.class, example);
+            int update = h.update(Example.class, example, Where.builder().eq("S", "wangbing").build());
             System.out.println(update);
 
             System.out.println("测试 delete");
-            int delete = h.delete(Example.class, "s = 'wangbing'");
+            Where build = Where.builder().eq("S", "wangbing").build();
+            int delete = h.delete(Example.class, build);
             System.out.println(delete);
 
         } catch (ClassNotFoundException e) {