[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; =0=#M(w
} sllT1%?
int i1=l; b&U1^{(
int i2=mid+1; '`P%;/z
for(int cur=l;cur<=r;cur++){ XMuZ}u[U
if(i1==mid+1) hy*{{f;
data[cur]=temp[i2++]; D*%am|QL
else if(i2>r) [s>3xWZ+a
data[cur]=temp[i1++]; fY!?rZ)$
else if(temp[i1] data[cur]=temp[i1++]; X_TjJmc
else 0SIC=p=J
data[cur]=temp[i2++]; ETdXk&AN
} dH^6K0J
} by@KdQow
ST*h{:u&A
} );gY8UL^
}csA|cC
改进后的归并排序: W[8Kia-OD
/| v.A\:
package org.rut.util.algorithm.support; <kK>C8+
7AV{ h[J
import org.rut.util.algorithm.SortUtil; 2tq2
uQ5h5Cfz
/** Y@+Rb
* @author treeroot ;5j|B|v
* @since 2006-2-2 %":3xj'EEI
* @version 1.0 IL].!9
*/ Z+El(f x
public class ImprovedMergeSort implements SortUtil.Sort { h<G4tjtk
i.Rl&t
private static final int THRESHOLD = 10; .11l(M
:jiuu@<
/* qVn<c,8#
* (non-Javadoc) nje7?Vz
* ENTcTrTn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aOzIo-
*/ iS$[dC ?N
public void sort(int[] data) { !=dz^f.{
int[] temp=new int[data.length]; G?W:O{n3
mergeSort(data,temp,0,data.length-1); Rd#R}yA
} Y!<m8\
^[?y 2A:
private void mergeSort(int[] data, int[] temp, int l, int r) { ?"x4u#x
int i, j, k; C}8#yAS9M
int mid = (l + r) / 2; b(*\4n
if (l == r) RQ,#TbAe
return; D\Ak-$kJ^
if ((mid - l) >= THRESHOLD) QL/KY G
mergeSort(data, temp, l, mid); A[Mke
else ~:a1ELqVw
insertSort(data, l, mid - l + 1); UM7@c7B?
if ((r - mid) > THRESHOLD) iq; | i!
mergeSort(data, temp, mid + 1, r); 75# 8P?i
else g&$=Y7G
insertSort(data, mid + 1, r - mid); tIuM9D{P
*2/Jg'de
for (i = l; i <= mid; i++) { axC|,8~tq
temp = data; ,;g%/6X
} Z.\q$U7'9
for (j = 1; j <= r - mid; j++) { ;I>nA6A
temp[r - j + 1] = data[j + mid]; cJ4My#w
} cJo%j -AM
int a = temp[l]; \O|SPhaIf
int b = temp[r]; 7Jn%XxHq
for (i = l, j = r, k = l; k <= r; k++) { ]Z!Y*v
if (a < b) { #J[g r_
data[k] = temp[i++]; C`.YOkpj
a = temp; nrl?<4_
} else { ,h*gd^i
data[k] = temp[j--]; N*Aw-\Bk
b = temp[j]; N<)CG,/w[M
} yYCS-rF>
} 'UhoKb_p
} mfraw2H
\"O5li3n
/** ;+hh|NiQ
* @param data cE\w6uBR1
* @param l WcN4ff-
* @param i :aNjh
*/ -"[4E0g0
private void insertSort(int[] data, int start, int len) { v vErzUxN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cIU2qFn[
} Z<vz%7w
} A0{xt*g
} t!?`2Z5
} !l'nX
|;gx;qp4cN
堆排序： C[^VM$
IK -vcG
package org.rut.util.algorithm.support; AzU:Dxr>.G
I-#!mFl
import org.rut.util.algorithm.SortUtil; zIc6L3w$
6N@=*0kh-
/** r^,_m,s'<
* @author treeroot !:+U-mb*
* @since 2006-2-2 g0,~|.
* @version 1.0 yhH2b:nY(9
*/ y_WC"
public class HeapSort implements SortUtil.Sort{ Oc)n,D)0
:,8y8z$+
/* (non-Javadoc) KMhrw s{&B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7F"ljkN1S
*/ 48xgl1R(j
public void sort(int[] data) { 7'wpPXdY1
MaxHeap h=new MaxHeap(); 4!!|P
h.init(data); maapX/J
for(int i=0;i h.remove(); G@s:|oe
System.arraycopy(h.queue,1,data,0,data.length); c^|8qvS$
} Z!v,;MW
>@N.jw>#T
private static class MaxHeap{ 1]}\h]*
!&U75FpN}:
void init(int[] data){ <$nPGz)}
this.queue=new int[data.length+1]; Q=Q+*oog
for(int i=0;i queue[++size]=data; f}c;s
fixUp(size); ?O25k!7
} i@/%E~W
} *JOK8[Qn
%<yW(s9{
private int size=0; 2^XmtT
6C$+D
private int[] queue; I gJu/{:y^
o#FctM'Z
public int get() { #hBqgG:>
return queue[1]; #c|l|Xvq2
} LNL}R[1(
*RY}e
public void remove() { g!0 j1
SortUtil.swap(queue,1,size--); h),;j`PrC
fixDown(1); IsE&k2 SD
} {tVA(&\<
file://fixdown B} qRz
private void fixDown(int k) { (CQ! &Z8
int j; m]DP{-s4
while ((j = k << 1) <= size) { {JWixbA
if (j < size %26amp;%26amp; queue[j] j++; T)tr"<F5NP
if (queue[k]>queue[j]) file://不用交换 [)`*k#.=
break; yK{P%oh)
SortUtil.swap(queue,j,k); hx^@aI
k = j; k2Q[v
} rT="ciQ
} B+FTkJ0t+G
private void fixUp(int k) { #7fOH U8v
while (k > 1) { jHq+/\
int j = k >> 1; q`AsnAzo&
if (queue[j]>queue[k]) 2`i&6iz
break; [CHN3&l-5S
SortUtil.swap(queue,j,k); #mH28UT
k = j; ?3DL .U{
} :/->m6C`0
} xEG:KSH
py$Gy-I~[
} `y'%dY}$n
3B#fnj
} 9Zx| L/\
A7QT4h&6
SortUtil： F]OWqUV
`@Z$+
package org.rut.util.algorithm; }r04*P(
X'd\b}Bm
import org.rut.util.algorithm.support.BubbleSort; @kd$.7Y9
import org.rut.util.algorithm.support.HeapSort; s\.r3U&6
import org.rut.util.algorithm.support.ImprovedMergeSort; 2zo>`;l
import org.rut.util.algorithm.support.ImprovedQuickSort; c%<81Y=
import org.rut.util.algorithm.support.InsertSort; S*r }oX0
import org.rut.util.algorithm.support.MergeSort; dhLd2WSyH
import org.rut.util.algorithm.support.QuickSort; 4gZR!J
import org.rut.util.algorithm.support.SelectionSort; E2hML
import org.rut.util.algorithm.support.ShellSort; 5P*jGOg.
319 4]
/** QP%AJ[3ea%
* @author treeroot 3meZ]u
* @since 2006-2-2 P'}EZ'
* @version 1.0 JNU9RxR
*/ u}'m7|)8
public class SortUtil { d3oRan}z
public final static int INSERT = 1; )m-(-I
public final static int BUBBLE = 2; } %3;j5 ;6
public final static int SELECTION = 3; 9'X"a
public final static int SHELL = 4; g9GPyU
public final static int QUICK = 5; =j_4!^
public final static int IMPROVED_QUICK = 6; ml~)7J
public final static int MERGE = 7; p+I`xyk
public final static int IMPROVED_MERGE = 8; :t;\`gQoS
public final static int HEAP = 9; 6/a%%1c1
KYhL}C+
public static void sort(int[] data) { o &b\bK%E
sort(data, IMPROVED_QUICK); '<"%>-^Gn
} i[/1AI
private static String[] name={ |}l/6WHB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `[=/f=Q}
}; mv<cyWp
?zo7.R-Vac
private static Sort[] impl=new Sort[]{ c3fd6Je5
new InsertSort(), x}C$/7^
new BubbleSort(), (>Sy,
new SelectionSort(), 1\jj3Y'i'
new ShellSort(), I/h(*~/
new QuickSort(), JWt@vf~
new ImprovedQuickSort(), #,jm3Mqj
new MergeSort(), tjZS:@3 Z
new ImprovedMergeSort(), %*L8W*V
new HeapSort() ,[n=PJVw/
}; q:_-#u
s_u! RrC
public static String toString(int algorithm){ 0s4]eEXH
return name[algorithm-1]; gYL#} )g
} &S^a_L:
CJ;D&qo
public static void sort(int[] data, int algorithm) { ^]LWcJ?"^!
impl[algorithm-1].sort(data); 4YMUkwh
} (Q"s;g
.>5E 4^$%
public static interface Sort { ?AQR\)P
public void sort(int[] data); C-2#-{<
} NS4W!o;"
T.!.3B$@]
public static void swap(int[] data, int i, int j) { :2L-Nf
int temp = data; 7r3EMX\#Qm
data = data[j]; K>+c2;t;
data[j] = temp; En+`ZcA\z
} }g.)%Bw!
} q_6<}2m,U