[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; @Y UY9+D&
} ,;.B4
int i1=l; EqnpMHF
int i2=mid+1; {pDTy7!Hs
for(int cur=l;cur<=r;cur++){ UP;Q=t
if(i1==mid+1) A XBkJ'jd
data[cur]=temp[i2++]; hOPe^e"
else if(i2>r) d(fPECv(
data[cur]=temp[i1++]; >BNw
else if(temp[i1] data[cur]=temp[i1++]; b]*X<,p
else hr$Sa
data[cur]=temp[i2++]; ?j/kOD0
} _BV`,`8}
} QqtC`H\
Wp5]Uk
} P8wy*JvT
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改进后的归并排序: +z-[s6q2m
MZ|\S/
package org.rut.util.algorithm.support; $Z;BQJVH
zF5q=9 4$
import org.rut.util.algorithm.SortUtil; ja[OcR-tX
Vkr`17`G
/** '{[!j6wt\
* @author treeroot $PSY:Zz
* @since 2006-2-2 Q.,DZp
* @version 1.0 (0i'Nb"
*/ }:`5,b%Y_
public class ImprovedMergeSort implements SortUtil.Sort { V+lRi"m?|
w[(n>
private static final int THRESHOLD = 10; {-@~Q.&}v
5YiZ-CQ>
/* [pii
* (non-Javadoc) GQN98Y+h
* lhqQCV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nr OqH
*/ k(P3LJcYQ
public void sort(int[] data) { -bypuMQ-p
int[] temp=new int[data.length]; QDS0ejhp
mergeSort(data,temp,0,data.length-1); gnt45]@{
} L[9OVD
qZaO&"q
private void mergeSort(int[] data, int[] temp, int l, int r) { mD7}t
int i, j, k; *z0K%@M
int mid = (l + r) / 2; D(Qa>B"1
if (l == r) W57&\PXYn
return; TPHYz>D]
if ((mid - l) >= THRESHOLD) |olNA*4
mergeSort(data, temp, l, mid); 0p-#f|ET
else FV A UR
insertSort(data, l, mid - l + 1); IX9K.f
if ((r - mid) > THRESHOLD) 0[/vQ+O]2
mergeSort(data, temp, mid + 1, r); -kl;!:'.3
else A 4j<\xL
insertSort(data, mid + 1, r - mid); 3gpo %
c45tmul
for (i = l; i <= mid; i++) { sAi&A9"*
temp = data; `(!NYx
} j 1(T )T
for (j = 1; j <= r - mid; j++) { _gKu8$o=-
temp[r - j + 1] = data[j + mid]; Z,WubX<
} %e{(twp
int a = temp[l]; f=o4I2Y[
int b = temp[r]; <Nex8fiJ9
for (i = l, j = r, k = l; k <= r; k++) { pI>*u ]x
if (a < b) { "u;YI=+
data[k] = temp[i++]; I!0JG`&
a = temp; HA!t$[_Ve
} else { xP{-19s1]
data[k] = temp[j--]; !hCS#'
b = temp[j]; lkA^\+Ct
} Cxm6TO`-;
} s~J=<)T*6
} T~X41d\
WfG(JJ
/** 'wZ_4XjD
* @param data mc ZGg;3
* @param l D{p5/#|r
* @param i e1unzpWN
*/ \ZSTKi?
private void insertSort(int[] data, int start, int len) { *|YU]b;W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sqpGrW.
} )11W)G`w
} \jyjQ,v)
} =&Xdm(
} 0|XKd24BN
b`CWp;6Y
堆排序： q[ULGv
.:y5U}vR
package org.rut.util.algorithm.support; ^s{hs(8%R
:p>hW!~
import org.rut.util.algorithm.SortUtil; :CaTP%GW
ZenPw1-
/** S`iR9{+&
* @author treeroot !>n|c$=;qk
* @since 2006-2-2 Mvb':/M
* @version 1.0 YT=eVg53
*/ & Kmy}q
public class HeapSort implements SortUtil.Sort{ ^Kqf~yS%
.!RavEg+
/* (non-Javadoc) uZIJoT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _BS 9GB
*/ 5mgHlsDzu
public void sort(int[] data) { Jdj?I'XtY
MaxHeap h=new MaxHeap(); |QMA@Mx
h.init(data); +Ok%e.\ZM
for(int i=0;i h.remove(); 6|!NLwa
System.arraycopy(h.queue,1,data,0,data.length); 3c#s|qW
} XErUS80
?Elg?)os
private static class MaxHeap{ V8PLFt;
"DQ'C%sL9
void init(int[] data){ ^Ga&}-
this.queue=new int[data.length+1]; f:woP7FP
for(int i=0;i queue[++size]=data; pQWHG#?7
fixUp(size); ?j{C*|yHO
} OBOwz4<
} T_;]fPajjD
DlTR|(AL
private int size=0; w?LrJ37u
*:hyY!x
private int[] queue; mfom=-q3k
Dl C@fZD
public int get() { ".U^ifF
return queue[1]; riCV&0"n
} Br5o7(AE
W5pb;74|
public void remove() { ^Q.,\TL01
SortUtil.swap(queue,1,size--); {0v*xL_O^
fixDown(1); bwiD$
} E(^0B(JF
file://fixdown v]"L]/"
private void fixDown(int k) { L}%dCe
int j; #sB,1"
while ((j = k << 1) <= size) { edvFQ#,d
if (j < size %26amp;%26amp; queue[j] j++; 7J*N_8?2
if (queue[k]>queue[j]) file://不用交换 ?+2b(2&MXE
break; PmX2[7
SortUtil.swap(queue,j,k); sL^yB
k = j; < <Y}~N
} SJ?)%[(T
} #VGjCEeU
private void fixUp(int k) { b]Z@^<_E
while (k > 1) { aFj.i8+
int j = k >> 1; 4n0xE[-
if (queue[j]>queue[k]) /)>S<X
break; cYNV\b4-
SortUtil.swap(queue,j,k); lr@#^
k = j; 8g~EL{'
} q]% T:A=
} /rc%O*R
1(#;&:$`i
} d8o53a]
NHQF^2\\
} M+P$/Wk
^%>kO,
SortUtil： mD58T2Z
jd-glE,Y/
package org.rut.util.algorithm; K^[#]+nQ
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import org.rut.util.algorithm.support.BubbleSort; Ao9R:|9
import org.rut.util.algorithm.support.HeapSort; DcD{*t?x
import org.rut.util.algorithm.support.ImprovedMergeSort; 1Sz A3c
import org.rut.util.algorithm.support.ImprovedQuickSort; :t("L-GPW
import org.rut.util.algorithm.support.InsertSort; c64v,Hj9
import org.rut.util.algorithm.support.MergeSort; ,'fxIO
import org.rut.util.algorithm.support.QuickSort; )_7>nuQ6
import org.rut.util.algorithm.support.SelectionSort; u1^wDc*xg
import org.rut.util.algorithm.support.ShellSort; {QAv~S>4
2 QTZwx
/** wBSQ:f]g
* @author treeroot [bz T&o
* @since 2006-2-2 <|B1wa:|
* @version 1.0 Q \hY7Xq'
*/ s)J(/
public class SortUtil { #qBr/+b
public final static int INSERT = 1; nY%5cJ`"
public final static int BUBBLE = 2; p#P~Q/;
public final static int SELECTION = 3; $md%xmQ[
public final static int SHELL = 4; c=O,;lWFqm
public final static int QUICK = 5; w'Tq3-%V
public final static int IMPROVED_QUICK = 6; &a0r%L()X
public final static int MERGE = 7; g"VMeW^
public final static int IMPROVED_MERGE = 8; dl-l"9~;
public final static int HEAP = 9; b7`D|7D
u{<"NR h
public static void sort(int[] data) { |*5 =_vF
sort(data, IMPROVED_QUICK); OhZgcUqQ8
} ;,h/
private static String[] name={ */qtzt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~uWOdm-"[
}; =uHnRY
}yn0IWVa
private static Sort[] impl=new Sort[]{ kRJ4-n^@><
new InsertSort(), 21X`h3+=
new BubbleSort(), Dim> 7Wbh
new SelectionSort(), 4BL;FO
new ShellSort(), \Q?ip&R
new QuickSort(), rqPo)AL
new ImprovedQuickSort(), 2F{hg%
new MergeSort(), gV;H6"
new ImprovedMergeSort(), e}Vw!w
new HeapSort() /^SAC%PD
}; !|hoYU>@2L
LkruL_E>
public static String toString(int algorithm){ &)wiKh"$
return name[algorithm-1]; uA tV".
} d[^KL;b?6
z4%uN|V
public static void sort(int[] data, int algorithm) { ipnV$!z
impl[algorithm-1].sort(data); HAzBy\M{
} 2jJmE&)7,
s9;#!7ms
public static interface Sort { 6 gL=u-2
public void sort(int[] data); Rk<@?(l!6x
} E51dV:l
}_/Hdmmx
public static void swap(int[] data, int i, int j) { q%n6K
int temp = data; gN8hJG'0
data = data[j]; $,=6[T!z+e
data[j] = temp; SvM6iZ]
} S_MyoXV
} z}QwP~Z