标签：
在SpringMVC中不得不用到强大的数据绑定
MODEL:
PlatFormRole.java
@Entity
@Table(name = "dsm_ROLE")
public class PlatformRole extends DsmObject {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column
private Integer role_id;
@Column
private String role_name;
@Column
private Integer role_class;
@ManyToMany(mappedBy = "roles",fetch = FetchType.EAGER)
private Set<PlatformUser> users;
// 饥渴加载，在管理角色同时能够加载出相应的权限
@ManyToMany(fetch = FetchType.EAGER)
@JoinTable(name = "dms_role_pri", joinColumns = { @JoinColumn(name = "rid") }, inverseJoinColumns = { @JoinColumn(name = "pid") })
private Set<PlatformPrivilege> pris;
public Integer getRole_id() {
return role_id;
}
public void setRole_id(Integer role_id) {
this.role_id = role_id;
}
public String getRole_name() {
return role_name;
}
public void setRole_name(String role_name) {
this.role_name = role_name;
}
public Integer getRole_class() {
return role_class;
}
public void setRole_class(Integer role_class) {
this.role_class = role_class;
}
public PlatformRole(Integer role_id, String role_name, Integer role_class) {
super();
this.role_id = role_id;
this.role_name = role_name;
this.role_class = role_class;
}
public PlatformRole() {
}
public Set<PlatformUser> getUsers() {
return users;
}
public void setUsers(Set<PlatformUser> users) {
this.users = users;
}
public Set<PlatformPrivilege> getPris() {
return pris;
}
public void setPris(Set<PlatformPrivilege> pris) {
this.pris = pris;
}
}
PlatformUser.java
public class PlatformUser extends DsmObject {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column
private Integer userid;
@Column
private String username;
@Column
private String password;
@Column
private String work_id;
@ManyToOne(cascade = CascadeType.MERGE, fetch = FetchType.EAGER)
@JoinColumn(name = "org_id")
private PlatformOrganization org_id;
// 饥渴加载，在加载用户信息同时加载角色信息
@ManyToMany(fetch = FetchType.EAGER)
@JoinTable(name = "dsm_user_role", joinColumns = { @JoinColumn(name = "userid") }, inverseJoinColumns = { @JoinColumn(name = "rid") })
private List<PlatformRole> roles;
@Column
private String telephone;
public Integer getUserid() {
return userid;
}
public void setUserid(Integer userid) {
this.userid = userid;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public List<PlatformRole> getRoles() {
return roles;
}
public void setRoles(List<PlatformRole> roles) {
this.roles = roles;
}
public String getWork_id() {
return work_id;
}
public void setWork_id(String work_id) {
this.work_id = work_id;
}
public PlatformOrganization getOrg_id() {
return org_id;
}
public void setOrg_id(PlatformOrganization org_id) {
this.org_id = org_id;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
public PlatformUser() {
}
}
可以看到，在PlatformUser中有一个角色属性，与用户的关系是一对多的
private List<PlatformRole> roles;
那么在修改某个用户的时候如何绑定当前用户的多个角色？
在Controller中：
@RequestMapping(value = "/{user_id}/update", method = RequestMethod.GET)
public String update(@PathVariable int user_id, Model model) {
model.addAttribute("platformOrganization",
platformOrgService.findAllOrg());
model.addAttribute("user_id", user_id);
List<PlatformRole> r = platformRoleService.findAllRole();
model.addAttribute("platformRole",r);
model.addAttribute(platformUserService.findUserById(user_id));
return "/platform/updUser";
}
@RequestMapping(value = "/{user_id}/update", method = RequestMethod.POST)
public String update(@PathVariable int user_id, PlatformUser user) {
platformUserService.updateUser(user);
return "redirect:/platformIndex/users";
}
这是最常见的写法。
在View中：
<body>
<div class="container">
<div class="row">
<div class=" col-md-12">
<div class="page-header">
<h2>用户修改</h2>
</div>
</div>
</div>
</div>
<form:form action="platformIndex/${user_id}/update" method="post"
modelAttribute="platformUser" class="form-horizontal" role="form">
<div class="form-group">
<label for="userid" class="col-md-2 control-label">用户id</label>
<div class="col-md-6">
<form:input class="form-control" path="userid" placeholder="userid" />
</div>
</div>
<div class="form-group">
<label for="username" class="col-md-2 control-label">用户名</label>
<div class="col-md-6">
<form:input class="form-control" path="username"
placeholder="username" />
</div>
</div>
<div class="form-group">
<label for="password" class="col-md-2 control-label">密码</label>
<div class="col-md-6">
<form:input class="form-control" path="password"
placeholder="password" />
</div>
</div>
<div class="form-group">
<label for="role" class="col-md-2 control-label">角色</label>
<div class="col-md-3">
<%-- <form:select path="role_id" class="form-control">
<form:option value="-" label="请选择" />
<form:options items="${platformRole}" itemValue="role_id"
itemLabel="role_name" />
</form:select> --%>
<%-- <form:select class="form-control" path="role_id.role_id" items="${platformRole}"
itemValue="role_id" itemLabel="role_name" /> --%>
<%-- <form:checkboxes path="roles" items="${platformRole}"
itemValue="role_id" itemLabel="role_name" /> --%>
<c:forEach items="${platformRole}" var="r" begin="0"
varStatus="status">
<form:checkbox path="roles[${status.index }].role_id" value="${r.role_id }" label="${r.role_id }" />
</c:forEach>
</div>
</div>
<div class="form-group">
<label for="workID" class="col-md-2 control-label">工号</label>
<div class="col-md-6">
<form:input class="form-control" path="work_id" placeholder="workID" />
</div>
</div>
<div class="form-group">
<label for="organization" class="col-md-2 control-label">部门</label>
<div class="col-md-3">
<form:select class="form-control" path="org_id.org_id"
items="${platformOrganization}" itemValue="org_id"
itemLabel="org_name" />
</div>
</div>
<div class="form-group">
<label for="telephone" class="col-md-2 control-label">联系方式</label>
<div class="col-md-6">
<form:input class="form-control" path="telephone"
placeholder="telephone" />
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<button type="submit" class="btn btn-default">修改</button>
<button type="reset" class="btn btn-default">重置</button>
</div>
</div>
</form:form>
</body>
注意到角色的绑定：
<c:forEach items="${platformRole}" var="r" begin="0"
varStatus="status">
<form:checkbox path="roles[${status.index }].role_id" value="${r.role_id }" label="${r.role_id }" />
</c:forEach>
通过这种方式可以讲User Model中的List<Role> roles;取出来
SpringMVC Checkbox 对List<object> 数据绑定
标签：
原文地址：http://my.oschina.net/duanvincent/blog/464094
