java如何在jsp/jstl中使用选定值进行多重选择?
你好,我有一个用户有一些角色 使用者阶级
public class User {
private Long id;
private String firstName;
private String lastName;
private Set<Role> roles = new HashSet<Role>(0);
public Long getId(){return id;} public void setId(Long id){this.id=id;}
public String getFirstName() { return this.firstName; }
public void setFirstName(String firstname) { this.firstName = firstname; }
public String getLastName() { return this.lastName; }
public void setLastName(String lastname) { this.lastName = lastname; }
public Set<Role> getRoles() { return this.roles; }
public void setRoles(Set<Role> roles) { this.roles = roles; }
}
角色。阶级
public class Role {
private Long id;
private String name;
public Long getId() { return id; }
public void setId(Long id) { this.id = id; }
public String getName() { return name; }
public void setName(String name) { this.name = name; }
}
在jsp文件中,我想进行多重选择,其中包含所有具有所选值的角色(用户拥有的角色)
我试过:
<select id="roles" name="roles" multiple="true" size="4">
<c:forEach items="${allRoles}" var="role">
<option value="${role.id}" <c:if test="${role.id == roleSelected.id}">selected</c:if> >${role.name}</option>
</c:forEach>
</select>
其中allRoles代表所有角色,roleSelected代表用户。角色。 但它不起作用,在jstl中有没有什么方式可以说“如果用户中的角色被选中了,那么角色被选中了”? 谢谢你的建议
更新:
不知怎么的,它不起作用了,我在那门课上放了一个记录器,我有:
public static boolean contains(Collection<?> collection, Object object) {
System.out.println("coll = " + collection.toString());
System.out.println("obj="+ object.toString());
System.out.println("res="+ collection.contains(object));
return collection.contains(object);
}
在我的日志中,第二次测试的结果应该是真的:
coll = [Id :2;Code: TESTName: Temp Manager;Enabled: true;Comment: ;]
obj=Id :1;Code: ADMName: ADMIN;Enabled: true;Comment: For Adminstrators;
res=false
coll = [Id :2;Code: TESTName: Temp Manager;Enabled: true;Comment: ;]
obj=Id :2;Code: TESTName: Temp Manager;Enabled: true;Comment: ;
res=false
coll = [Id :2;Code: TESTName: Temp Manager;Enabled: true;Comment: ;]
obj=Id :3;Code: RHHName: TECHNOMEDIA;Enabled: true;Comment: Dfdf;
res=false
coll = [Id :2;Code: TESTName: Temp Manager;Enabled: true;Comment: ;]
obj=Id :4;Code: RESPONSName: Refd;Enabled: true;Comment: Sdsds;
res=false
共 (0) 个答案