[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; mnWbV\VY
} <\S j5
int i1=l; z[ N_3n
int i2=mid+1; $ *^E
for(int cur=l;cur<=r;cur++){ 'l3K*lck
if(i1==mid+1) {V9}W<
data[cur]=temp[i2++]; .TWX,#
else if(i2>r) mdD9Q N01
data[cur]=temp[i1++]; ) "Toh=x]
else if(temp[i1] data[cur]=temp[i1++]; <E&"]
else k34!*(`q
data[cur]=temp[i2++]; qfzT8-Y
} ;Cqjg.wkB
} N?;5%pG <
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} eFeWjB'<7
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改进后的归并排序: #>byP?)n
k@= LR
package org.rut.util.algorithm.support; &OSyU4r
aF\?X&|
import org.rut.util.algorithm.SortUtil; PNMf5'@m
x2gP, p-
/** a0ze7F<(
* @author treeroot ]tVXao
* @since 2006-2-2 RDu'N
* @version 1.0 m}3POl/*j
*/ B>&eciY
public class ImprovedMergeSort implements SortUtil.Sort { .8%mi'0ud
|+MV%QG;
private static final int THRESHOLD = 10; Qvd$fY**
ZXj;ymC'
/* 35[8XD
* (non-Javadoc) XK5qE"
* = A !;`G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /RmHG H!
*/ _}B:SM
public void sort(int[] data) { #TX=%x6
int[] temp=new int[data.length]; |O]oX[~
mergeSort(data,temp,0,data.length-1); K9y!ZoB
} nC5
21BlLz
private void mergeSort(int[] data, int[] temp, int l, int r) { 88ydAx#P
int i, j, k; ^L<*ggw
int mid = (l + r) / 2; S qQqG3F
if (l == r) z<F.0~)jb
return; AQ 5CrYb
if ((mid - l) >= THRESHOLD) lAwOp
mergeSort(data, temp, l, mid); e[@q{.
else zoV-@<Eh
insertSort(data, l, mid - l + 1); k+S 6)BQ7U
if ((r - mid) > THRESHOLD) Tx7YHE6{
mergeSort(data, temp, mid + 1, r); %8V/QimHU
else Pl }dA
insertSort(data, mid + 1, r - mid); 7^~pOFdH
-vfV;+3
for (i = l; i <= mid; i++) { tU%-tlU9?
temp = data; ^m
} EO;f`s)t
for (j = 1; j <= r - mid; j++) { fxQN
temp[r - j + 1] = data[j + mid]; ?7cF_Zvve
} M9@#W"
int a = temp[l]; M#qZ0JT4
int b = temp[r]; *S.2p*Vd
for (i = l, j = r, k = l; k <= r; k++) { P~0d'Oi
if (a < b) { |j i}LWcD
data[k] = temp[i++]; G'z&U?Ng
a = temp; 8P3EQY-
} else { d*lnXzQor
data[k] = temp[j--]; <oSk!6*
b = temp[j]; 1b'1vp
} WQ]~TGW
} 9k^;]jE
} K`@GNT&
eb)S<%R/
/** QH%{r4
* @param data m//(1hWv7
* @param l VB 8t"5
* @param i +6!.)Ea=
*/ e3wFi,/@
private void insertSort(int[] data, int start, int len) { 5CkM0G`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J|Lk::Ri
} id.o)=
} L$`!~z1
} A]{8=
} 'sm+3d
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堆排序： (o\:rLZu
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package org.rut.util.algorithm.support; fwIZr~l
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import org.rut.util.algorithm.SortUtil; eN%Ks
Y:VM5r)
/** I/GZ
* @author treeroot %f@VOSs
* @since 2006-2-2 C/[2?[
* @version 1.0 OZ_'&CZ
*/ ~R)Km`t
public class HeapSort implements SortUtil.Sort{ S&V5zB""n
oS$&jd
/* (non-Javadoc) oj<.axA,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R$*{@U
*/ =? xA*_^
public void sort(int[] data) { B{|P}fN5}
MaxHeap h=new MaxHeap(); =?57*=]0M
h.init(data); >;QkV6i7
for(int i=0;i h.remove(); -)?~5Z
System.arraycopy(h.queue,1,data,0,data.length); u9>.x zYG
} +6f5uMKUvs
''wWw(2O
private static class MaxHeap{ r}QW!^F
;=6++Oq
void init(int[] data){ 8@/]ki`>
this.queue=new int[data.length+1]; v^[Ny0cM
for(int i=0;i queue[++size]=data; tGD$cBE
fixUp(size); ;'pEzz?k"
} ~?6V-m{>#
} tZ=BK:39\
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private int size=0; &^4W+I{H
/,= wP)
private int[] queue; sj`9O-?49
(>>pla^
public int get() { .dp~%!"Sn,
return queue[1]; [ WZ<d^L
} G_[|N>
*Yvfp{B
public void remove() { $Kb-mFR
SortUtil.swap(queue,1,size--); 788q<7E
fixDown(1); GA6Z{U{XS
} tB[(o%k
file://fixdown d+ih]?
private void fixDown(int k) { !?ayZ5G([
int j; #joU}Rj|
while ((j = k << 1) <= size) { $K,rVTU
if (j < size %26amp;%26amp; queue[j] j++; 2X)E3V/*
if (queue[k]>queue[j]) file://不用交换 Z[AJat@H
break; E] t:_v
SortUtil.swap(queue,j,k); J(M0t~RZ
k = j; ez86+
} T[<llh'+
} eJ%~6c`@!
private void fixUp(int k) { rem&F'x0V
while (k > 1) { *u7C){)gr[
int j = k >> 1; p0$K.f| ^
if (queue[j]>queue[k]) B{/Pv0y
break; z8>KY/c
SortUtil.swap(queue,j,k); uiE9#G
k = j; 5HL JkOV5
} Y#{KGVT<
} ',6QL4qV/
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} R.|fc5_"+
**-%5~
} \(Zdd \,
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SortUtil： GMgsM6.R
d)r=W@tF]
package org.rut.util.algorithm; =[t([DG
)Ah
import org.rut.util.algorithm.support.BubbleSort; :'Imz
import org.rut.util.algorithm.support.HeapSort; lEZ[0oa
import org.rut.util.algorithm.support.ImprovedMergeSort; RURO0`^
import org.rut.util.algorithm.support.ImprovedQuickSort; P!B\:B%4~]
import org.rut.util.algorithm.support.InsertSort; zi[bpa17W
import org.rut.util.algorithm.support.MergeSort; ^67P(h
import org.rut.util.algorithm.support.QuickSort; $NG}YOP)@
import org.rut.util.algorithm.support.SelectionSort; `z5j
import org.rut.util.algorithm.support.ShellSort; BIbcm,YQ
uTP=kgYqJ
/** s4MP!n?gB
* @author treeroot +Z$X5Th
* @since 2006-2-2 SP HeI@i
* @version 1.0 ~LO MwMHl
*/ vCbqZdy?
public class SortUtil { 4p>@UB&U
public final static int INSERT = 1; 9Wx q
public final static int BUBBLE = 2; 5 ;dg#hO
public final static int SELECTION = 3; gA2\c5F<
public final static int SHELL = 4; XV%L6x
public final static int QUICK = 5; *[W!ng
public final static int IMPROVED_QUICK = 6; 4=F~^Xc`
public final static int MERGE = 7; N;-+)=M,rf
public final static int IMPROVED_MERGE = 8; ;N]ElwP
public final static int HEAP = 9; 'D\(p,(Mt
-Q 6W`*8
public static void sort(int[] data) { cy^6g?ew
sort(data, IMPROVED_QUICK); ;c:vzF~Q
} c4L5"_#`x-
private static String[] name={ kt X(\Hf!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7F\U|kx_
}; s;8J= \9W
T"9`[Lzva
private static Sort[] impl=new Sort[]{ &ks>.l\
new InsertSort(), 09|d<
new BubbleSort(), dW8'$!@!!
new SelectionSort(), .__X[Mzth3
new ShellSort(), b*dRNu
new QuickSort(), ] =>vv;L
new ImprovedQuickSort(), ;?zb (2
new MergeSort(), >?U(w<
new ImprovedMergeSort(), O~fRcf:Q
new HeapSort() ,a^_ ~(C
}; (M.Sl
RU_=VB %
public static String toString(int algorithm){ zMtK_ccQ
return name[algorithm-1]; jh\q2E~,`
} X?4tOsd
}Ax$}#
public static void sort(int[] data, int algorithm) { rm3~]
impl[algorithm-1].sort(data); i1 SP
} ?$-OdABXHK
4vBZb^W;9
public static interface Sort { Z9=Cw0( w?
public void sort(int[] data); Lk#u^|Eq7=
} Xb$)}n\9
~+3f8%
public static void swap(int[] data, int i, int j) { 6<]&T lS]
int temp = data; vhWj_\m
data = data[j]; I+`~6
data[j] = temp; Cd|V<BB9
} v{?9PRf\s
} z?j~ 2K<4