OGNL表达式之s:iterator使用

本文主要是介绍OGNL表达式之s:iterator使用，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1、普通属性（单一变量） 
public String execute(){ 
   username = "zhangsan"; 
   password = "123"; 
} 
<s:property value="username"/><br> 
<s:property value="password"/><br> 
2、自定义对象（实体属性）
public String execute(){ 
  userInfo = new UserInfo(); 
  userInfo.setUsername("hhh"); 
  userInfo.setPassword("111"); 
} 
<s:property value="userInfo.username"/><br> 
<s:property value="userInfo.password"/><br> 
3、List（普通属性） 
  public String execute(){ 
  list = new ArrayList<String>(); 
  list.add("aaa"); 
  list.add("bbb"); 
  list.add("ccc"); 
} 
<s:iterator value="list" var="var"> 
     <s:property value="var"/><br> 
</s:iterator> 
   或者： 
<s:iterator value="list"> 
     <s:property/><br> 
</s:iterator> 
   
4、List（自定义对象属性） 
public String execute(){ 
  list = new ArrayList<UserInfo>(); 
  UserInfo userInfo = new UserInfo(); 
  userInfo.setUsername("u1"); 
  userInfo.setPassword("p1"); 
  userInfo.setRoleInfo(new RoleInfo("r1")); 
  list.add(userInfo); 
  userInfo = new UserInfo(); 
  userInfo.setUsername("u2"); 
  userInfo.setPassword("p2"); 
  userInfo.setRoleInfo(new RoleInfo("r2")); 
  list.add(userInfo); 
} 
<s:iterator value="list" var="var"> 
    <s:property value="#var.username"/> 
    <s:property value="#var.password"/> 
    <s:property value="#var.roleInfo.rolename"/><br> 
</s:iterator> 
或者： 
<s:iterator value="list"> 
    <s:property value="username"/> 
    <s:property value="password"/> 
    <s:property value="roleInfo.rolename"/><br> 
</s:iterator> 
5、数组（普通属性） 
public String execute(){ 
  strs = new String[2]; 
  strs[0] = "as"; 
  strs[1] = "asd"; 
} 
<s:iterator value="strs"> 
    <s:property/><br> 
</s:iterator> 
或者： 
<s:iterator value="strs" var="var"> 
    <s:property value="var"/><br> 
</s:iterator> 
   
6、数组（自定义对象属性） 
public String execute(){ 
  strs = new UserInfo[2]; 
  UserInfo userInfo = new UserInfo(); 
  userInfo.setUsername("u11"); 
  userInfo.setPassword("11"); 
  strs[0] = userInfo; 
  userInfo = new UserInfo(); 
  userInfo.setUsername("u22"); 
  userInfo.setPassword("22"); 
  strs[1] = userInfo; 
} 
<s:iterator value="strs"> 
    <s:property value="username"/> 
    <s:property value="password"/><br> 
</s:iterator> 
或者： 
<s:iterator value="strs" var="var"> 
    <s:property value="#var.username"/> 
    <s:property value="#var.password"/><br> 
</s:iterator> 
7、数组（自定义对象属性） 
public String execute(){ 
  strs = new UserInfo[2]; 
  UserInfo userInfo = new UserInfo(); 
  userInfo.setUsername("u11"); 
  userInfo.setPassword("11"); 
  userInfo.setRoleInfo(new RoleInfo("r11")); 
  strs[0] = userInfo; 
  userInfo = new UserInfo(); 
  userInfo.setUsername("u22"); 
  userInfo.setPassword("22"); 
  userInfo.setRoleInfo(new RoleInfo("r22")); 
  strs[1] = userInfo; 
} 
<s:iterator value="strs" var="var"> 
    <s:property value="#var.username"/> 
    <s:property value="#var.password"/> 
    <s:property value="#var.roleInfo.rolename"/><br> 
</s:iterator> 
或者： 
<s:iterator value="strs"> 
    <s:property value="username"/> 
    <s:property value="password"/> 
    <s:property value="roleInfo.rolename"/><br> 
</s:iterator> 
8、Map（普通属性） 
public String execute(){ 
  map = new HashMap<String,String>(); 
  map.put("k1", "v1"); 
  map.put("k2", "v2"); 
} 
<s:iterator value="map" var="var"> 
    <s:property value="#var.key"/> 
    <s:property value="#var.value"/><br> 
</s:iterator> 
或者： 
<s:iterator value="map"> 
    <s:property value="key"/> 
    <s:property value="value"/><br> 
</s:iterator> 
9、Map（自定义对象属性） 
public String execute(){ 
  map = new HashMap<String,UserInfo>(); 
  UserInfo userInfo = new UserInfo(); 
  userInfo.setUsername("u1"); 
  userInfo.setPassword("p1"); 
  userInfo.setRoleInfo(new RoleInfo("r1")); 
  map.put("k1", userInfo); 
  userInfo = new UserInfo(); 
  userInfo.setUsername("u2"); 
  userInfo.setPassword("p2"); 
  userInfo.setRoleInfo(new RoleInfo("r2")); 
  map.put("k2", userInfo); 
} 
<s:iterator value="map" var="var"> 
    <s:property value="#var.key"/> 
    <s:property value="#var.value.username"/> 
    <s:property value="#var.value.password"/> 
    <s:property value="#var.value.roleInfo.rolename"/><br> 
</s:iterator> 
或者 
<s:iterator value="map"> 
    <s:property value="key"/> 
    <s:property value="value.username"/> 
    <s:property value="value.password"/> 
    <s:property value="value.roleInfo.rolename"/><br> 
</s:iterator> 
10、Map嵌套Map（自定义对象属性） 
public String execute(){ 
  map = new TreeMap<String,Map<String,UserInfo>>(); 
  Map<String,UserInfo> innerMap = new TreeMap<String,UserInfo>(); 
  UserInfo userInfo = new UserInfo(); 
  userInfo.setUsername("u1"); 
  userInfo.setPassword("p1"); 
  userInfo.setRoleInfo(new RoleInfo("r1")); 
  userInfo = new UserInfo(); 
  userInfo.setUsername("u11"); 
  userInfo.setPassword("p11"); 
  userInfo.setRoleInfo(new RoleInfo("r11")); 
  innerMap.put("k1", userInfo); 
  innerMap.put("k11", userInfo); 
  map.put("key1", innerMap); 
  // 
  innerMap = new TreeMap<String,UserInfo>(); 
  userInfo = new UserInfo(); 
  userInfo.setUsername("u2"); 
  userInfo.setPassword("p2"); 
  userInfo.setRoleInfo(new RoleInfo("r2")); 
  userInfo = new UserInfo(); 
  userInfo.setUsername("u22"); 
  userInfo.setPassword("p22"); 
  userInfo.setRoleInfo(new RoleInfo("r22")); 
  innerMap.put("k2", userInfo); 
  innerMap.put("k22", userInfo); 
  map.put("key2", innerMap); 
} 
<s:iterator value="map" var="var"> 
    <s:iterator value="value"> 
     <s:property value="#var.key"/> 
     <s:property value="key"/> 
     <s:property value="value.username"/> 
     <s:property value="value.password"/> 
     <s:property value="value.roleInfo.rolename"/><br> 
    </s:iterator> 
</s:iterator> 

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