foreach 遍及字符串数组
时间: 2023-10-13 18:08:06 浏览: 30
使用forEach遍历字符串数组的语法如下:
```
var strArr = ["hello", "world", "!"];
strArr.forEach(function(str) {
console.log(str);
});
```
输出结果为:
```
hello
world
!
```
相关问题
foreach用法字符串数组
使用for-each循环遍历字符串数组可以通过以下方式实现:
String[] strArray = {"Hello", "World", "GPT-3.5"};
for (String str : strArray) {
// 进行相应的操作
}
其中,for-each循环的语法为:for (元素类型 元素变量 : 遍历对象),在这里元素类型为String,元素变量为str,遍历对象为strArray。
mybatis foreach 字符串数组
MyBatis provides a "foreach" tag that allows you to iterate over a collection, including an array of strings. Here's an example of how you can use the "foreach" tag with a string array in MyBatis:
```xml
<select id="getUserByIds" resultType="User">
SELECT * FROM users
WHERE id IN
<foreach item="item" index="index" collection="ids" open="(" separator="," close=")">
#{item}
</foreach>
</select>
```
In this example, "getUserByIds" is the ID of the SQL query, and "User" is the result type of the query. The "ids" attribute refers to the string array parameter passed to the query. The "open" attribute specifies the opening string before the iteration, the "separator" attribute specifies the separator between each item, and the "close" attribute specifies the closing string after the iteration.
You can then use this query in your Java code and pass a string array called "ids" to the MyBatis mapper method:
```java
String[] ids = { "1", "2", "3" };
List<User> users = sqlSession.selectList("getUserByIds", ids);
```
This will execute the SQL query and retrieve the users with the specified IDs from the database.