net.sf.json.JSONException: java.lang.NoSuchMethodException: Property 'name' has no getter method解决方法

╰+哭是因爲堅強的太久メ 2022-05-11 06:30 261阅读 0赞

**目录**

转换json的时候报错：

解决方法1：

解决方法2：一般用安卓自带的，或者谷歌的Gson

--------------------

# #

## 转换json的时候报错： ##

net.sf.json.JSONException: java.lang.NoSuchMethodException: Property 'name' has no getter method
        at net.sf.json.JSONObject.defaultBeanProcessing(JSONObject.java:818)
        at net.sf.json.JSONObject._fromBean(JSONObject.java:699)
        at net.sf.json.JSONObject.fromObject(JSONObject.java:172)
        at net.sf.json.AbstractJSON._processValue(AbstractJSON.java:274)
        at net.sf.json.JSONArray._processValue(JSONArray.java:2513)
        at net.sf.json.JSONArray.processValue(JSONArray.java:2538)
        at net.sf.json.JSONArray.addValue(JSONArray.java:2525)
        at net.sf.json.JSONArray._fromCollection(JSONArray.java:1056)
        at net.sf.json.JSONArray.fromObject(JSONArray.java:123)
        at net.sf.json.JSONArray.fromObject(JSONArray.java:105)
        at com.css.eshop.test.testJSon.test(testJSon.java:52)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
        at org.ecl

测试的时候想着方便一点，写在了一起，先看看源码：（Student类是同一个test里）

package com.css.eshop.test;
    
    import static org.junit.Assert.*;
    
    import java.io.Serializable;
    import java.util.ArrayList;
    import java.util.List;
    
    import org.junit.Test;
    import net.sf.json.JSONArray;
    import net.sf.json.JsonConfig;
    
     class Student {  
    	private String name;
    	private String password;
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    	
    }
    public class testJSon {
    	@Test
    	public void test() {
    		List<Student> attrList = new ArrayList<Student>();
    		Student sti=new Student();
    		sti.setName("小可爱");sti.setPassword("12345");
    		
    		Student sti2=new Student();
    		sti2.setName("猪头");sti2.setPassword("12345");
    		
    		attrList.add(sti);attrList.add(sti2);
    	
    		String attrJson = JSONArray.fromObject(attrList).toString();
    		System.out.println(attrJson);
    		
    	
    	}
    }

测试的时候，报错：

![70][]

# 解决方法1： #

（1）分开写。

package com.css.eshop.test;
    
    import static org.junit.Assert.*;
    import java.io.Serializable;
    import java.util.ArrayList;
    import java.util.List;
    import org.junit.Test;
    
    import net.sf.json.JSONArray;
    
    public class testJSon {
    
    	@Test
    	public void test() {
    		List<Student> attrList = new ArrayList<Student>();
    		Student sti=new Student();
    		sti.setName("小可爱");sti.setPassword("12345");
    		
    		Student sti2=new Student();
    		sti2.setName("猪头");sti2.setPassword("12345");
    		
    		attrList.add(sti);attrList.add(sti2);
    		/*System.out.println(attrList);*/
    		
    		String attrJson = JSONArray.fromObject(attrList).toString();
    		System.out.println(attrJson);
    		
    	
    	}
    }

package com.css.eshop.test;
    
    public class Student {
    	private String name;
    	private String password;
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    	
    }

测试结果：

![70 1][]

# 解决方法2：一般用安卓自带的，或者谷歌的Gson #

（1）导入gson的jar包。

![70 2][]

（2）编写代码

package com.css.eshop.test;
    
    import static org.junit.Assert.*;
    
    import org.junit.Test;
    
    import java.util.ArrayList;
    import java.util.List;
    
    import com.google.gson.Gson;
    
    
    class Student1 {
    	public String name;
    	public String password;
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    	@Override
    	public String toString() {
    		return "Student [name=" + name + ", password=" + password + "]";
    	}
    	
    }
    public class test2 {
    	
    	public static void main(String[] args) {
    		test();
    	}
    
    	public static void test() {
    		List<Student1> attrList = new ArrayList<>();
    		Student1 sti=new Student1();
    		sti.setName("小可爱");sti.setPassword("12345");
    		
    		Student1 sti2=new Student1();
    		sti2.setName("猪头");sti2.setPassword("12345");
    		
    		attrList.add(sti);
    		attrList.add(sti2);
    		
    		Gson gson = new Gson();
    		String json = gson.toJson(attrList);
    		System.out.println(json);
    	}
    
    }

（3）测试结果：

![70 3][]

[70]: /images/20220511/627a13c6991a4edd8b98ca8bd670adbc.png
[70 1]: /images/20220511/572a951dbcf1463e99e42a33a634e808.png
[70 2]: /images/20220511/5e9332c6f6e94cb898e0d38e8b82fd8c.png
[70 3]: /images/20220511/482007c7e29c488b84bf82494390c739.png