Springboot:Localhost:8080导致Whitepage-Error而不是显示内容 [英] Springboot: Localhost:8080 results in Whitepage-Error instead of showing content
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问题描述
我正在尝试使用Springboot和Thymeleaf显示基因列表.数据库(基因，蛋白质等)和所有方法(例如基因的getIdentifier)都可以使用. 项目结构为:
I am trying to display a list of genes using Springboot and Thymeleaf. Database (genes, proteins etc.) and all methods(e.g. getIdentifier of a gene) are present and work. The project structure is:
我的类/html文件是:
My classes/html-files are:
主要:
package main;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@ComponentScan
@EnableAutoConfiguration
public class Main {
public static void main(String[] args) {
SpringApplication.run(Main.class, args);
}
}
ApplicationController:
ApplicationController:
package gui.spring.controller;
import db.admin.DatabaseQuery;
import db.admin.local.DatabaseQueryLocal;
import db.io.FileReader;
import db.sample.Gene;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import java.util.List;
@SpringBootApplication
@Controller
public class ApplicationController {
@RequestMapping(value = "/", method=RequestMethod.GET)
public String root(Model model){
DatabaseQuery query = new DatabaseQueryLocal();
new FileReader(query);
List<Gene> genes = query.getGenes();
model.addAttribute("genes", genes);
return "root";
}
}
root.html:
root.html:
<!DOCTYPE html>
<html lang="en" xmlns:th="http://thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<th:block th:each="gene:${genes} ">
<p th:text="${gene.getIdentifier()}"></p>
</th:block>
</body>
</html>
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>1.0.0</modelVersion>
<groupId>SpringBoot</groupId>
<artifactId>biosampledb</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.3.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<type>jar</type>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
<version>1.4.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.7</version>
</dependency>
</dependencies>
</project>
因此，我们已经在课程中进行了此操作，可悲的是，没有对Springboot/Thymeleaf/Maven进行任何解释.我想大部分都弄明白了.我想要的所需结果是，在浏览器中调用"localhost:8080"后，将显示一个基因标识符列表.运行主atm时，出现白色标签错误页面. 我希望这就是解决我的问题所需的全部代码.我监督/错过了什么?
So, we have had this in a course and sadly, no explaination to Springboot/Thymeleaf/Maven was given. I figured out most of it, I guess. What I want as desired result is, that upon calling "localhost:8080" in my browser, a list of gene Identifiers is displayed. Upon running the main atm, I get a Whitelabel error page. I hope, this is all Code needed to fix my problem. What did I oversee/missunderstand?
谢谢:)
这是DatabaseQuery接口(已提供).
This is the DatabaseQuery Interface (which was provided).
package db.admin;
import db.sample.Assay;
import db.sample.Gene;
import db.sample.Protein;
import org.apache.commons.lang3.*;
import java.util.List;
import java.util.Optional;
public interface DatabaseQuery {
List<Assay> getAssays();
List<Gene> getGenes();
List<Protein> getProteins();
void addAssay(Assay assay);
void addGene(Gene gene);
void addProtein(Protein protein);
/**
* Returns all Assays that used a Protein that is associated with the given gene.
*
* @param gene - gene to get the proteins
*
* @return list of associated assays
*/
List<Assay> getAssaysByGene(Gene gene);
/**
* Returns all Proteins that have a measurement above or equal to 'meas' in any Assay
*
* @param meas - threshold value
* @return A list of tuples (Pairs) where the Protein is left and the measured score from the assay is right
*/
List<Pair<Protein, Double>> getAssayResultsByMeas(Double meas);
/**
* Return all Scores and assoc. Assays for a given Protein
*
* @param protein - protein to look up
* @return List of Pairs of assays and results for the given protein on that assay
*/
List<Pair<Assay, Double>> getScores(Protein protein);
/**
* Returns a protein by given identifier. Returns Optinal.empty if there is no protein with this name
*
* @param identifier - id of the protein
* @return Optional protein
*/
Optional<Protein> getProteinByName(String identifier);
/**
* Returns a gene by given identifier. Returns Optinal.empty if there is no gene with this name
*
* @param name - id of a gene
* @return Optional protein
*/
Optional<Gene> getGeneByName(String name);
/**
* Returns a assay by given identifier. Returns Optinal.empty if there is no assay with this name
*
* @param name - id of a gene
* @return Optional protein
*/
Optional<Assay> getAssayByName(String name);
}
DatabaseQueryLocal类:
DatabaseQueryLocal Class:
package db.admin.local;
import db.admin.DatabaseQuery;
import db.sample.Assay;
import db.sample.Gene;
import db.sample.Protein;
import org.apache.commons.lang3.*;
import org.apache.commons.lang3.tuple.ImmutablePair;
//import org.apache.commons.lang3.tuple.ImmutablePair;
//import org.apache.commons.lang3.tuple.Pair;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
public class DatabaseQueryLocal implements DatabaseQuery {
private final DatabaseLocal db;
public DatabaseQueryLocal() {
this.db = DatabaseLocal.getInstance();
}
@Override
public List<Assay> getAssays(){
return db.assayList;
}
@Override
public List<Gene> getGenes(){
return db.geneList;
}
@Override
public List<Protein> getProteins(){
return db.proteinList;
}
@Override
public void addAssay(Assay assay){
db.assayList.add(assay);
}
@Override
public void addGene(Gene gene){
db.geneList.add(gene);
}
@Override
public void addProtein(Protein protein){
db.proteinList.add(protein);
}
/**
* Returns all Assays that used a Protein that is associated with the given gene.
*
* @param gene - gene to get the proteins
*
* @return list of associated assays
*/
@Override
public List<Assay> getAssaysByGene(Gene gene){
Protein protein = gene.getProtein();
return this.getAssays().stream()
.filter(assay -> assay.getUsedProteins().contains(protein))
.collect(Collectors.toList());
}
/**
* Returns all Proteins that have a measurement above or equal to 'meas' in any Assay
*
* @param meas - threshold value
* @return A list of pairs where the Protein is left and the measured score from the assay is right
*/
@Override
public List<Pair<Protein, Double>> getAssayResultsByMeas(Double meas){
List<Pair<Protein, Double>> results = new ArrayList<>();
for(Assay assay: getAssays()){
List<Double> measurements = assay.getMeasurements();
List<Protein> proteins = assay.getUsedProteins();
for (int i = 0; i < measurements.size(); i++) {
Double m = measurements.get(i);
if(m >= meas){
//results.add(new ImmutablePair<Protein,Double>(proteins.get(i), m));
results.add(new Pair<>(proteins.get(i), m));
}
}
}
return results;
}
/**
* Return all Scores and assoc. Assays for a given Protein
*
* @param protein - protein to look up
* @return List of Pairs of assays and results for the given protein on that assay
*/
@Override
public List<Pair<Assay, Double>> getScores(Protein protein) {
List<Pair<Assay, Double>> results = new ArrayList<>();
for (Assay assay : getAssays()) {
List<Double> measurements = assay.getMeasurements();
List<Protein> proteins = assay.getUsedProteins();
for (int i = 0; i < proteins.size(); i++) {
if (proteins.get(i).equals(protein)) {
results.add(new Pair<>(assay, measurements.get(i)));
//results.add(new ImmutablePair<Assay,Double>(assay, measurements.get(i)));
// http://www.javased.com/index.php?api=org.apache.commons.lang3.tuple.Pair
// https://www.programcreek.com/java-api-examples/?api=org.apache.commons.lang3.tuple.ImmutablePair
}
}
}
return results;
}
/**
* Returns a protein by given identifier. Returns Optional.empty if there is no protein with this name
*
* @param identifier - id of the protein
* @return Optional protein
*/
@Override
public Optional<Protein> getProteinByName(String identifier){
Optional<Protein> r = this.getProteins().stream().filter(p -> p.getIdentifier().equals(identifier)).findFirst();
if(!r.isPresent()){
System.err.println("DBQueryLocal: could not find protein by name: " + identifier);
}
return r;
}
/**
* Returns a gene by given identifier. Returns Optional.empty if there is no gene with this name
*
* @param name - id of a gene
* @return Optional protein
*/
@Override
public Optional<Gene> getGeneByName(String name){
return this.getGenes().stream().filter(p -> p.getIdentifier().equals(name)).findFirst();
}
/**
* Returns a assay by given identifier. Returns Optional.empty if there is no assay with this name
*
* @param name - id of a gene
* @return Optional protein
*/
@Override
public Optional<Assay> getAssayByName(String name){
return this.getAssays().stream().filter(p -> p.getName().equals(name)).findFirst();
}
}
UPDATE3:执行日志
来自IntelliJ的执行日志.最后三行出现 在浏览器中调用"localhost:8080".之后，使用停止按钮手动终止过程.
UPDATE3: Execution log
Execution log from IntelliJ. the last three lines appear, when calling "localhost:8080" in the browers. Process was terminated manually using the stop-button afterwards.
推荐答案
模板的默认百里香叶前缀(属性:spring.thymeleaf.prefix)为:classpath:/templates/
The default thymeleaf prefix (It is the property: spring.thymeleaf.prefix) for templates is: classpath:/templates/
如果您将root.html移至src/main/resources/templates，则应该可以正常工作，如果我什么都不想错过的话.
If you move your root.html to src/main/resources/templates, it should work, if I don't miss anything else.
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