$.ajax({
    url: 'yourAction.action',
    type: 'POST',
    data: {
        'arrayParam': ['value1', 'value2', 'value3'],
        'arrayParam2': [1, 2, 3]
    },
    traditional: true,  // 必须设置为true才能正确传递数组
    success: function(response) {
        console.log(response);
    }
});

public class YourAction extends ActionSupport {
    private String[] arrayParam;
    private int[] arrayParam2;
    
    // 必须提供setter方法
    public void setArrayParam(String[] arrayParam) {
        this.arrayParam = arrayParam;
    }
    
    public void setArrayParam2(int[] arrayParam2) {
        this.arrayParam2 = arrayParam2;
    }
    
    public String execute() {
        // 处理数组参数
        for(String param : arrayParam) {
            System.out.println(param);
        }
        return SUCCESS;
    }
}

private List<String> listParam;

public void setListParam(List<String> listParam) {
    this.listParam = listParam;
}

// 前端
$.ajax({
    url: 'complexAction.action',
    type: 'POST',
    traditional: true,
    data: {
        'users[0].name': 'John',
        'users[0].age': 30,
        'users[1].name': 'Jane',
        'users[1].age': 25
    },
    success: function(response) {
        console.log(response);
    }
});

// 后端
public class ComplexAction extends ActionSupport {
    private List<User> users;
    
    public static class User {
        private String name;
        private int age;
        // getters and setters
    }
    
    public void setUsers(List<User> users) {
        this.users = users;
    }
    // ...
}