Java SimpleScriptContext setBindings()用法及代码示例

SimpleScriptContext类的setBindings()方法用于为给定范围设置属性的Bindings，其中Bindings和scope作为参数传递给该方法。如果范围是ENGINE_SCOPE，则给定的绑定将替换engineScope字段。如果范围是GLOBAL_SCOPE，则给定的Bindings将替换globalScope字段。

用法:

public void setBindings(Bindings bindings,
                        int scope)

参数：此方法接受two-parameters：

bindings这是要设置和绑定的属性的绑定
scope这是设置属性的范围。

返回值：此方法不返回任何内容。

异常：此方法引发以下异常：

NullPointerException ：如果scope的值为ENGINE_SCOPE并且指定的Bindings为null。
IllegalArgumentException：如果范围无效。

以下示例程序旨在说明SimpleScriptContext.setBindings()方法：
程序1:

// Java program to demonstrate 
// SimpleScriptContext.setBindings() method 
  
import javax.script.ScriptContext; 
import javax.script.SimpleBindings; 
import javax.script.SimpleScriptContext; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create SimpleScriptContext object 
        SimpleScriptContext simple 
            = new SimpleScriptContext(); 
  
        // create Bindings 
        SimpleBindings bindings 
            = new SimpleBindings(); 
  
        // add some key-value to bindings 
        bindings.put("name1", "Value1"); 
  
        // add bindings to SimpleScriptContext using 
        // setBindings() Method 
        simple.setBindings( 
            bindings, 
            ScriptContext.ENGINE_SCOPE); 
  
        // print 
        System.out.println( 
            "name1:"
            + simple.getAttribute("name1")); 
    } 
}

输出：

name1:Value1

程序2:

// Java program to demonstrate 
// SimpleScriptContext.setBindings() method 
  
import javax.script.ScriptContext; 
import javax.script.SimpleBindings; 
import javax.script.SimpleScriptContext; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create SimpleScriptContext object 
        SimpleScriptContext simple 
            = new SimpleScriptContext(); 
  
        // create Bindings 
        SimpleBindings bindings 
            = new SimpleBindings(); 
  
        // add some key-value to bindings 
        bindings.put("Team1", "India"); 
        bindings.put("Team2", "Japan"); 
        bindings.put("Team3", "Nepal"); 
  
        // add bindings to SimpleScriptContext using 
        // setBindings() Method 
        simple.setBindings( 
            bindings, 
            ScriptContext.ENGINE_SCOPE); 
  
        // print 
        System.out.println("Team1:"
                           + simple.getAttribute("Team1")); 
        System.out.println("Team2:"
                           + simple.getAttribute("Team2")); 
        System.out.println("Team3:"
                           + simple.getAttribute("Team3")); 
    } 
}

输出：

Team1:India
Team2:Japan
Team3:Nepal

参考：https：//docs.oracle.com/javase/10/docs/api/javax/script/SimpleScriptContext.html#setBindings(javax.script.Bindings，int)

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注：本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 SimpleScriptContext setBindings() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。