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starter-wsqlite
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master
wangbing 6 years ago
parent db46df1f0f
commit f92ceb2977
4 changed files with 189 additions and 124 deletions
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6
src/main/java/RowMapper.java
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@ -1,6 +0,0 @@
import java.sql.ResultSet;
import java.sql.SQLException;
public interface RowMapper<T> {
public abstract T mapRow(ResultSet rs, int index) throws SQLException;
}

191
src/main/java/SqliteClient.java
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@ -19,7 +19,7 @@ public class SqliteClient {
private Statement statement;
private ResultSet resultSet;
private String dbFilePath;
private List<Class> obList = new ArrayList<>();
private Map<String, Class> classMap = new HashMap<>();
/**
* 构造函数
@ -31,10 +31,13 @@ public class SqliteClient {
*/
public SqliteClient(File dbFile, List<Class> classList) throws ClassNotFoundException, SQLException {
this.dbFilePath = dbFile.getAbsolutePath();
this.obList.addAll(classList);
for (Class aClass : classList) {
classMap.put(aClass.getName(), aClass);
}
if (!dbFile.exists()) {
connection = getConnection();
for (Class object : obList) {
for (String key : classMap.keySet()) {
Class object = classMap.get(key);
StringBuffer sql = new StringBuffer();
String name = object.getSimpleName();
@ -54,43 +57,40 @@ public class SqliteClient {
sql.replace(sql.length() - 1, sql.length(), "");
sql.append(")");
System.out.println(sql.toString());
System.out.println("SQL ==> " + sql.toString());
execute(sql.toString());
}
}
}
public <T> void insert(T t) throws SQLException, ClassNotFoundException {
public <T> void insert(Class<T> poClass, T po) throws SQLException, ClassNotFoundException {
try {
for (Class aClass : obList) {
if (t.getClass() == aClass) {
Class aClass = classMap.get(poClass.getName());
if (aClass == null) {
System.err.println(poClass.getName() + " not found.");
} else {
StringBuffer sql = new StringBuffer();
String tableName = aClass.getSimpleName();
sql.append("INSERT INTO ");
sql.append(tableName.toUpperCase());
sql.append(aClass.getSimpleName().toUpperCase());
sql.append("(");
Map<String, Object> keyValues = new HashMap<>();
for (Field f : aClass.getDeclaredFields()) {
//获取字段列表
List<Field> fs = new ArrayList<>();
for (Field f : poClass.getDeclaredFields()) {
if (f.isAnnotationPresent(Varchar.class)) {
try {
f.setAccessible(true);
keyValues.put(f.getName().toUpperCase(), f.get(t));
} catch (IllegalAccessException e) {
e.printStackTrace();
}
fs.add(f);
}
}
StringBuffer fieldsSql = new StringBuffer();
StringBuffer valueSql = new StringBuffer();
List<String> argsList = new ArrayList<>();
for (String key : keyValues.keySet()) {
fieldsSql.append(key.toUpperCase());
fieldsSql.append(",");
for (int i = 0; i < fs.size(); i++) {
Field f = fs.get(i);
fieldsSql.append(f.getName().toUpperCase());
Object value = keyValues.get(key);
Object value = f.get(po);
if (value instanceof String) {
valueSql.append("'");
valueSql.append(value);
@ -98,95 +98,151 @@ public class SqliteClient {
} else {
valueSql.append(value);
}
if (i != fs.size() - 1) {
fieldsSql.append(",");
valueSql.append(",");
}
String[] args = new String[argsList.size()];
argsList.toArray(args);
if (",".equals(fieldsSql.substring(fieldsSql.length() - 1, fieldsSql.length()))) {
fieldsSql.replace(fieldsSql.length() - 1, fieldsSql.length(), "");
}
if (",".equals(valueSql.substring(valueSql.length() - 1, valueSql.length()))) {
valueSql.replace(valueSql.length() - 1, valueSql.length(), "");
}
sql.append(fieldsSql);
sql.append(") VALUES (");
sql.append(valueSql);
sql.append(")");
System.out.println(sql.toString());
System.out.println("SQL ==> " + sql.toString());
executeUpdate(sql.toString());
}
}
} catch (IllegalAccessException e) {
e.printStackTrace();
} finally {
destroyed();
}
}
public <T> int delete(T t, String... wheres) throws SQLException, ClassNotFoundException {
for (Class aClass : obList) {
if (t.getClass() == aClass) {
public <T> int delete(Class<T> poClass, String... wheres) throws SQLException, ClassNotFoundException {
try {
Class aClass = classMap.get(poClass.getName());
if (aClass == null) {
System.err.println(poClass.getName() + " not found.");
} else {
StringBuffer sql = new StringBuffer();
sql.append("delete from ");
sql.append(aClass.getSimpleName());
sql.append("DELETE FROM ");
sql.append(aClass.getSimpleName().toUpperCase());
if (wheres.length > 0) {
sql.append(" where");
sql.append(" WHERE");
for (int i = 0; i < wheres.length; i++) {
String where = wheres[i];
sql.append(where);
sql.append(i != wheres.length ? " and " : "");
sql.append(i != wheres.length ? " AND " : "");
}
}
return executeUpdate(sql.toString());
}
} finally {
destroyed();
}
return 0;
}
public <T> int update(T t, String... wheres) throws SQLException, ClassNotFoundException {
ArrayList<T> list = new ArrayList<>();
for (Class aClass : obList) {
if (t.getClass() == aClass) {
public <T> int update(Class<T> poClass, T po, String... wheres) throws SQLException, ClassNotFoundException {
try {
Class aClass = classMap.get(poClass.getName());
if (aClass == null) {
System.err.println(poClass.getName() + " not found.");
} else {
StringBuffer sql = new StringBuffer();
sql.append("update set ");
sql.append(aClass.getSimpleName());
sql.append("UPDATE ");
sql.append(aClass.getSimpleName().toUpperCase());
sql.append(" SET ");
//获取字段列表
List<Field> fs = new ArrayList<>();
for (Field f : poClass.getDeclaredFields()) {
if (f.isAnnotationPresent(Varchar.class)) {
f.setAccessible(true);
fs.add(f);
}
}
for (int i = 0; i < fs.size(); i++) {
Field f = fs.get(i);
sql.append(f.getName());
sql.append(" = ");
Object value = f.get(po);
if (value instanceof String) {
sql.append("'");
sql.append(value);
sql.append("'");
} else {
sql.append(value);
}
if (i != fs.size() - 1) {
sql.append(",");
}
}
if (wheres.length > 0) {
sql.append(" where");
sql.append(" WHERE");
for (int i = 0; i < wheres.length; i++) {
String where = wheres[i];
sql.append(where);
sql.append(i != wheres.length ? " and " : "");
sql.append(i != wheres.length ? " AND " : "");
}
}
System.out.println(sql.toString());
System.out.println("SQL ==> " + sql.toString());
return executeUpdate(sql.toString());
}
} catch (IllegalAccessException e) {
e.printStackTrace();
} finally {
destroyed();
}
return 0;
}
public <T> List<T> select(T t, String... wheres) throws SQLException, ClassNotFoundException {
public <T> List<T> select(Class<T> poClass, String... wheres) throws SQLException, ClassNotFoundException {
ArrayList<T> list = new ArrayList<>();
for (Class aClass : obList) {
if (t.getClass() == aClass) {
try {
Class aClass = classMap.get(poClass.getName());
if (aClass == null) {
System.err.println(poClass.getName() + " not found.");
} else {
StringBuffer sql = new StringBuffer();
sql.append("select * from ");
sql.append(aClass.getSimpleName());
sql.append("SELECT ");
//获取字段列表
List<Field> fs = new ArrayList<>();
for (Field f : poClass.getDeclaredFields()) {
if (f.isAnnotationPresent(Varchar.class)) {
fs.add(f);
}
}
for (int i = 0; i < fs.size(); i++) {
Field f = fs.get(i);
sql.append(f.getName().toUpperCase());
if (i != fs.size() - 1) {
sql.append(",");
}
}
sql.append(" FROM ");
sql.append(aClass.getSimpleName().toUpperCase());
if (wheres.length > 0) {
sql.append(" where");
sql.append(" WHERE");
for (int i = 0; i < wheres.length; i++) {
String where = wheres[i];
sql.append(where);
sql.append(i != wheres.length ? " and " : "");
sql.append(i != wheres.length ? " AND " : "");
}
}
System.out.println(sql.toString());
list.addAll(executeQuery(sql.toString(),t));
System.out.println("SQL ==> " + sql.toString());
list.addAll(executeQuery(sql.toString(), poClass));
}
} finally {
destroyed();
}
return list;
}
@ -195,30 +251,30 @@ public class SqliteClient {
* 执行select查询，返回结果列表
*
* @param sql sql select 语句
* @param t 结果集的行数据处理类对象
* @param poClass 结果集的行数据处理类对象
* @return
* @throws SQLException
* @throws ClassNotFoundException
*/
public <T> List<T> executeQuery(String sql, T t) throws SQLException, ClassNotFoundException {
public <T> List<T> executeQuery(String sql, Class<T> poClass) throws SQLException, ClassNotFoundException {
List<T> rsList = new ArrayList<T>();
try {
resultSet = getStatement().executeQuery(sql);
//2、获取字段列表
//获取字段列表
List<Field> fs = new ArrayList<>();
for (Field f : t.getClass().getDeclaredFields()) {
for (Field f : poClass.getDeclaredFields()) {
if (f.isAnnotationPresent(Varchar.class)) {
f.setAccessible(true);
fs.add(f);
}
}
while (resultSet.next()) {
try {
T o = (T) t.getClass().newInstance();
T o = poClass.newInstance();
for (int i = 0; i < fs.size(); i++) {
Field field = fs.get(i);
field.setAccessible(true);
String string = resultSet.getString(field.getName());
field.set(o, string);
Field f = fs.get(i);
String string = resultSet.getString(f.getName());
f.set(o, string);
}
rsList.add(o);
} catch (InstantiationException e) {
@ -249,7 +305,7 @@ public class SqliteClient {
}
/**
* 执行多个sql更新语句
* 执行sql更新语句
*
* @param sqls
* @throws SQLException
@ -282,6 +338,9 @@ public class SqliteClient {
return connection;
}
/**
* 获取数据库Statement对象
*/
private Statement getStatement() throws SQLException, ClassNotFoundException {
if (null == statement) {
statement = getConnection().createStatement();

30
src/main/java/SqliteTest.java
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@ -1,30 +0,0 @@
import entity.User;
import java.io.File;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
public class SqliteTest {
public static void main(String[] args) {
try {
List<Class> arrayList = new ArrayList();
arrayList.add(User.class);
SqliteClient h = new SqliteClient(new File("D:\\test.db"),arrayList);
User user = new User();
user.setName("wangbing");
user.setPassword(null);
h.insert(user);
List<User> select = h.select(user);
System.out.println("");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
}

42
src/test/java/SqliteTest.java
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@ -0,0 +1,42 @@
import entity.User;
import java.io.File;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
public class SqliteTest {
public static void main(String[] args) {
try {
List<Class> arrayList = new ArrayList();
arrayList.add(User.class);
SqliteClient h = new SqliteClient(new File("D:\\test.db"),arrayList);
System.out.println("测试 insert");
User user = new User();
user.setName("wangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbingwangbing");
user.setPassword("test");
h.insert(User.class, user);
System.out.println("测试 select");
List<User> select = h.select(User.class);
System.out.println(select.size());
// System.out.println("测试 update");
// user.setName("==");
// user.setPassword("==");
// int update = h.update(User.class, user);
// System.out.println(select.size());
// System.out.println("测试 delete");
// int delete = h.delete(User.class);
// System.out.println(delete);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
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