[开发工具]java 上传读取xml 转实体进行保存

一、上传xml文件如下图格式，使用XStream进行读取，根据自己需要，可以在<CS></CS>标签中包含多个<BindInfo>标签，和<BindInfo>中绑定多个<Element>标签类似

<?xml version="1.0" encoding="UTF-8"?>
<CS>
  <BindInfo>
    <zllx>0</zllx>
    <Element>
      <pzmc>3</pzmc>
      <pzlx>bit</pzlx>
    </Element>
    <Element>
      <pzmc>3</pzmc>
      <pzlx>bit</pzlx>
    </Element>
  </BindInfo>
</CS>

二、引入pom依赖

	<dependency>
		<groupId>com.thoughtworks.xstream</groupId>
		<artifactId>xstream</artifactId>
		<version>1.4.10</version>
	</dependency>

三、controller层 接收文件

 @PostMapping("upload")
 public Map<String, Object> upload(MultipartFile file) {
     Map<String, Object> map = service.upload(file);
     return map;
 }

四、service层，主要代码为?stream.xmlToBean。utils的封装方法在最后

 public  Map<String, Object> upload(MultipartFile file) {
        Map<String, Object> result = new HashMap<>();

        XStreamUtil stream = new XStreamUtil();
        BindInfo info = new BindInfo();
        try {
            //调用Util的封装方法
            info = stream.xmlToBean(file.getInputStream(), BindInfo.class);
        } catch (IOException e) {
            e.printStackTrace();
            log.error("文件格式有误");
            result.put("code", -1);
            result.put("message", "文件格式有误");
            return result;
        }
        List<ZlzdEntity> bindInfo = info.getBindInfo();
 
        for (ZlzdEntity : bindInfo) {
            insert(zlzdEntity);//自己写的插入
        }
        result.put("code", 200);
        result.put("message", "上传成功");
        return result;
    }

五、实体类

1. 首先最外层实体，与<CS>标签对应

? ? @XStreamAlias? 指定被注解的元素在xml文件中的标签名, 将属性按照别名输出,

? ? @XStreamImplicit?指定被注解的List被映射成多个标签

package com.tlck.wxgl.entity.xml;


import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.thoughtworks.xstream.annotations.XStreamAlias;
import com.thoughtworks.xstream.annotations.XStreamImplicit;
import com.tlck.wxgl.entity.ykxx.WxglZlzdEntity;
import lombok.Data;

import java.util.ArrayList;
import java.util.List;


@Data
@XStreamAlias("CS")//最外层标签
@JsonIgnoreProperties(value = "handler")
public class BindInfo {

    @XStreamImplicit(itemFieldName = "BindInfo")//里面标签
    private List<ZlzdEntity> BindInfo = new ArrayList<ZlzdEntity>();

}

Element标签如下映射，注解对应好即可

@Data
@AllArgsConstructor
@NoArgsConstructor
@XStreamAlias("BindInfo")
@JsonIgnoreProperties(value = {"handler"})
public class ZlzdEntity {
    @XStreamImplicit(itemFieldName = "Element")
    private List<ZlzdpzEntity> pzList ;    
}

六、XStreamUtil 封装xml转bean如下

/**
 * @description: xml工具类
 */
public class XStreamUtil {
     private XStream xStream = this.getXStreamInstance();

     private XStream getXStreamInstance() {
        return new XStream(new DomDriver(null, new XmlFriendlyNameCoder("_-", "_"))) {

            @Override
            protected MapperWrapper wrapMapper(MapperWrapper next) {
                return new MapperWrapper(next) {
                    @Override
                    public boolean shouldSerializeMember(Class definedIn, String fieldName) {

                        if (definedIn == Object.class) {
                            try {
                                return this.realClass(fieldName) != null;
                            } catch (Exception e) {
                                return false;
                            }
                        } else {
                            return super.shouldSerializeMember(definedIn, fieldName);
                        }
                    }
                };
            }
        };


    }
    /**
     * xml转实体
     */
    public <T> T xmlToBean(InputStream file, Class<T> cls) throws IOException, XStreamException {
        this.xStream.processAnnotations(cls);//对指定的类使用Annotations 进行序列化
        T t = (T) this.xStream.fromXML(file);//转实体类bean
        return t;
    }
}

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