com.jayway.restassured.RestAssured获取响应代码：400用于PUT请求

Question

import static com.jayway.restassured.RestAssured.given;
import com.jayway.restassured.builder.RequestSpecBuilder;
import com.jayway.restassured.response.Response;
import com.jayway.restassured.specification.RequestSpecification;
public class PUTAPI {
public void addNewObject() throws Throwable {
    //Creating api body 
    String xmlBody ="<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
            +"<PlanRunRequest>"
            +"<PlannedRunName>LIMS_Plan_Run_001</PlannedRunName>"
            +"<Assay></Assay>"
            +"<ReportingTemplate>LIMS_Report1</ReportingTemplate>"
            +"<TubeLabel>tube2343</TubeLabel>"
            +"<TemplateKitBarcode>91A18930101212-1234567171603172100001301</TemplateKitBarcode>"
            +"<PlanRunNotes>This is my 1st Plan</PlanRunNotes>"
            +"<LibraryPrepIDs>"
            +"<LibraryPrepID specimenID=\"\">1004</LibraryPrepID>"
            +"</LibraryPrepIDs>"
            +"</PlanRunRequest>";
    System.out.println(xmlBody);
    //Specifying request body details
    RequestSpecBuilder builder = new RequestSpecBuilder().setContentType("application/xml");
    RequestSpecification requestSpec = builder.build();
    requestSpec.baseUri("http://10.88.195.88").basePath("/ir/lims/create-library-batch").contentType("application/xml");

    //Making post request with authentication
    Response response =given().body(xmlBody).header("username","Auto1Admin").header("password", "ion123").spec(requestSpec).when().put();

    System.out.println("ir"+response.body().asString());
    System.out.println(response.getStatusCode() );

}

public static void main (String [] args) throws Throwable {
    PUTAPI service = new PUTAPI();
    service.addNewObject();

}

}

已验证＆＃39; String xmlBody＆＃39;即带XML-validator的XML请求体，未发现错误。通过邮递员提交此查询，验证请求URI，正文和标题。它显示了我成功的响应代码200 k，但是当我运行上面的脚本有正确的URI，正文和标题显示响应代码400 - 错误的请求。请帮我解决这个问题。