String isExport = this.getData().getString("IS_EXPORT");
时间: 2024-06-07 16:10:35 浏览: 1
这段代码是从一个对象中获取名为“IS_EXPORT”的字符串数据,并将其赋值给一个名为“isExport”的变量。假设这段代码位于一个Java类中,其中“this”指代当前对象,而“getData()”是获取该对象的数据的方法。因此,“this.getData().getString("IS_EXPORT")”表示从当前对象的数据中获取名为“IS_EXPORT”的字符串数据。最后,将该字符串数据赋值给名为“isExport”的变量。
相关问题
java中.sql的oracle语句导入到mysql
可以使用Java中的JDBC来连接Oracle和MySQL数据库,然后通过执行SQL语句将Oracle中的数据导入到MySQL中。
下面是一个简单的Java代码示例,假设你已经准备好了Oracle和MySQL的JDBC驱动程序:
```java
import java.sql.*;
public class OracleToMySQL {
public static void main(String[] args) {
String oracleUrl = "jdbc:oracle:thin:@localhost:1521:ORCL";
String oracleUser = "username";
String oraclePassword = "password";
String mysqlUrl = "jdbc:mysql://localhost:3306/mysql";
String mysqlUser = "root";
String mysqlPassword = "password";
try {
// Connect to Oracle database
Connection oracleConnection = DriverManager.getConnection(oracleUrl, oracleUser, oraclePassword);
Statement oracleStatement = oracleConnection.createStatement();
// Connect to MySQL database
Connection mysqlConnection = DriverManager.getConnection(mysqlUrl, mysqlUser, mysqlPassword);
Statement mysqlStatement = mysqlConnection.createStatement();
// Export tables from Oracle to MySQL
String[] tableNames = { "table1", "table2", "table3" };
for (String tableName : tableNames) {
// Export table schema
ResultSet rs = oracleStatement.executeQuery("SELECT * FROM " + tableName + " WHERE 1=0");
ResultSetMetaData rsmd = rs.getMetaData();
int numColumns = rsmd.getColumnCount();
StringBuilder createTableSql = new StringBuilder("CREATE TABLE " + tableName + " (");
for (int i = 1; i <= numColumns; i++) {
String columnName = rsmd.getColumnName(i);
String columnType = rsmd.getColumnTypeName(i);
int columnSize = rsmd.getColumnDisplaySize(i);
createTableSql.append(columnName + " " + columnType + "(" + columnSize + "),");
}
createTableSql.setLength(createTableSql.length() - 1);
createTableSql.append(")");
mysqlStatement.execute(createTableSql.toString());
// Export table data
rs = oracleStatement.executeQuery("SELECT * FROM " + tableName);
while (rs.next()) {
StringBuilder insertSql = new StringBuilder("INSERT INTO " + tableName + " VALUES (");
for (int i = 1; i <= numColumns; i++) {
String value = rs.getString(i);
insertSql.append("'" + value + "',");
}
insertSql.setLength(insertSql.length() - 1);
insertSql.append(")");
mysqlStatement.execute(insertSql.toString());
}
}
// Close connections
mysqlStatement.close();
mysqlConnection.close();
oracleStatement.close();
oracleConnection.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
```
需要注意的是,该代码仅供参考,实际应用中需要考虑更多的细节和异常情况。
请写出Java的SpringCloud微信登录后端代码和uniapp的微信小程序的微信登录前端代码以及基于mybatis的mapper.xml问价和
由于微信登录需要用到微信开发平台的API,这里只提供代码框架,具体实现需要结合微信开发平台文档进行编写。
Java的SpringCloud微信登录后端代码:
```java
@RestController
@RequestMapping("/wechat")
public class WechatLoginController {
@GetMapping("/login")
public String wechatLogin() {
// 生成state参数,防止CSRF攻击
String state = UUID.randomUUID().toString().replaceAll("-", "");
// 将state参数保存到session中
request.getSession().setAttribute("state", state);
// 构造微信登录授权url
String redirectUri = URLEncoder.encode("http://yourdomain.com/wechat/callback", "UTF-8");
String scope = "snsapi_userinfo";
String appId = "your_app_id";
String wechatLoginUrl = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" + appId + "&redirect_uri=" + redirectUri + "&response_type=code&scope=" + scope + "&state=" + state + "#wechat_redirect";
// 重定向到微信登录授权url
return "redirect:" + wechatLoginUrl;
}
@GetMapping("/callback")
public String wechatCallback(@RequestParam("code") String code, @RequestParam("state") String state, HttpServletRequest request) {
// 获取session中保存的state参数
String sessionState = (String) request.getSession().getAttribute("state");
if (!state.equals(sessionState)) {
// state参数不一致,可能是CSRF攻击
return "error";
}
// 根据code获取access_token和openid
String appId = "your_app_id";
String appSecret = "your_app_secret";
String accessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + appId + "&secret=" + appSecret + "&code=" + code + "&grant_type=authorization_code";
String result = HttpUtil.get(accessTokenUrl);
JSONObject jsonObject = JSON.parseObject(result);
String accessToken = jsonObject.getString("access_token");
String openid = jsonObject.getString("openid");
// 根据access_token和openid获取用户信息
String userInfoUrl = "https://api.weixin.qq.com/sns/userinfo?access_token=" + accessToken + "&openid=" + openid + "&lang=zh_CN";
result = HttpUtil.get(userInfoUrl);
jsonObject = JSON.parseObject(result);
String nickname = jsonObject.getString("nickname");
String avatar = jsonObject.getString("headimgurl");
// 将用户信息保存到数据库中
// ...
// 生成jwt token并返回前端
String token = generateToken(openid);
return token;
}
private String generateToken(String openid) {
// 生成jwt token
// ...
return token;
}
}
```
uniapp的微信小程序的微信登录前端代码:
```vue
<template>
<view>
<button type="primary" @click="wechatLogin">微信登录</button>
</view>
</template>
<script>
export default {
methods: {
wechatLogin() {
wx.login({
success(res) {
if (res.code) {
// 向后端发送请求,获取jwt token
uni.request({
url: 'http://yourdomain.com/wechat/callback',
data: {
code: res.code
},
success(res) {
console.log(res.data);
// 将jwt token保存到本地存储中
uni.setStorageSync('token', res.data);
}
});
} else {
console.log('登录失败!' + res.errMsg);
}
}
});
}
}
}
</script>
```
基于mybatis的mapper.xml文件:
```xml
<mapper namespace="com.example.mapper.UserMapper">
<resultMap id="userMap" type="com.example.entity.User">
<id property="id" column="id" />
<result property="openid" column="openid" />
<result property="nickname" column="nickname" />
<result property="avatar" column="avatar" />
</resultMap>
<select id="findByOpenid" resultMap="userMap">
SELECT id, openid, nickname, avatar
FROM user
WHERE openid = #{openid}
</select>
<insert id="insert" parameterType="com.example.entity.User">
INSERT INTO user(openid, nickname, avatar)
VALUES (#{openid}, #{nickname}, #{avatar})
</insert>
</mapper>
```
相关推荐
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)