[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; tz2$j@!=
} ]Yf8
int i1=l; p(A[ah_
int i2=mid+1; Y }8HJTMB
for(int cur=l;cur<=r;cur++){ i^eDM.#X
if(i1==mid+1) MU1T="N^+
data[cur]=temp[i2++]; Bc}e ??F
else if(i2>r) ^!SwY_>
data[cur]=temp[i1++]; n'@XgUI,
else if(temp[i1] data[cur]=temp[i1++]; PH!rWR
else u)l[*";S
data[cur]=temp[i2++]; 4*Z>-<W=
} g]._J
} 3UJSK+d\
!XY}\zKq
} M'$?Jp#]}
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改进后的归并排序: Na`vw
KPa&P:R3
package org.rut.util.algorithm.support; &-|(q!jm
;*e$k7}F
import org.rut.util.algorithm.SortUtil; 8FBXdk?A
Mey=%Fv
/** ]$A6krfh|
* @author treeroot <2PO3w?Z
* @since 2006-2-2 Il!#]
* @version 1.0 ~Yl%{1
*/ BEii:05
public class ImprovedMergeSort implements SortUtil.Sort { \05 n$.
)H<F([Jri
private static final int THRESHOLD = 10; ffh3okyW0
g=kuM
/* ;3N>m|?D=
* (non-Javadoc) !,;/JxfgVh
* t%30B^Ii%K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~`VD}{[,B
*/ OyTp^W`&
public void sort(int[] data) { U9yR~pw
int[] temp=new int[data.length]; liVj-*m
mergeSort(data,temp,0,data.length-1); c+]5[6
} 'M3V#5l)@|
qISzn04
private void mergeSort(int[] data, int[] temp, int l, int r) { {@3p^b*E)1
int i, j, k; yyuf
int mid = (l + r) / 2; 1EA}[x
if (l == r) 2]-xmS>|b
return; YX6[m6LU
if ((mid - l) >= THRESHOLD) m*H6\on:
mergeSort(data, temp, l, mid); HiDL:14
else ~(d#T|ez
insertSort(data, l, mid - l + 1); T\$r|
if ((r - mid) > THRESHOLD) 8nHFNOv6
mergeSort(data, temp, mid + 1, r); tU(vt0~b
else uHpSE?y/
insertSort(data, mid + 1, r - mid); 5SmgE2}
.g95E<bd
for (i = l; i <= mid; i++) { 4Nz]LK%@
temp = data; Rac4a@hZ
} EXTQ:HSES
for (j = 1; j <= r - mid; j++) { ,#QLc
temp[r - j + 1] = data[j + mid]; ao.v]6a
} "ku ?A^f
int a = temp[l]; PEHaH"|([=
int b = temp[r]; ]h0K*{
for (i = l, j = r, k = l; k <= r; k++) { XveG#oyiU
if (a < b) { !)TO2?,^
data[k] = temp[i++]; @+ U++
a = temp; G9i?yd4n=B
} else { f8?c[%br
data[k] = temp[j--]; .f]2%utHB
b = temp[j]; Gu P1
} A/{0J\pA
} ISl-W1u}
} X7gtR|[
{QRrAi
/** vx8-~Oq{|;
* @param data b".e6zev
* @param l t=$Hv
* @param i pJ 7="n
*/ .8.LW4-ff
private void insertSort(int[] data, int start, int len) { > : ;*3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z^r
} B'"RKs]
} />\6_kT
} 3m9ab"
} c_YP#U
h16i]V
堆排序： !Cv:,q
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package org.rut.util.algorithm.support; #XJ`/\E]
t*'U|K4L/
import org.rut.util.algorithm.SortUtil; XLNR%)l
(jY -MF3
/** '6&a8&:
* @author treeroot )+S^{tt
* @since 2006-2-2 =(Ll}V,
* @version 1.0 (]l}QR%Bxu
*/ -I\Y m_)
public class HeapSort implements SortUtil.Sort{ $rG~0
L)Iv]u
/* (non-Javadoc) Y$SwQ;wl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .}.63T$h9
*/ xYGB{g]
public void sort(int[] data) { M>BcYbXf
MaxHeap h=new MaxHeap(); lB Y"@N
h.init(data); {tlt5p!4
for(int i=0;i h.remove(); pl{Pur ;i
System.arraycopy(h.queue,1,data,0,data.length); ,:e##g~k
} LYv$U;*+
sZ!/uN!6
private static class MaxHeap{ Bco_\cpt]z
tL!R^Tf
void init(int[] data){ J|z>5Z
this.queue=new int[data.length+1]; >pV|c\
for(int i=0;i queue[++size]=data; ,,-g*[/3
fixUp(size); C {GSf`D!T
} -%*w&',G
} i!!1^DMrw
7fg +WZ
private int size=0; _m+64qG_8'
KF#,Q
private int[] queue; OEN!~-u
UaQR0,#0y
public int get() { J,bE[52
return queue[1]; *0 0K3
} FYe(SV(9
N!fTt,
public void remove() { HktvUJ(Ii
SortUtil.swap(queue,1,size--); %S<0l@=5`l
fixDown(1); Xy>+r[$D:
} R0n#FL^E
file://fixdown q~^qf
private void fixDown(int k) { `nxm<~-\
int j; MMpGI^x!-X
while ((j = k << 1) <= size) { 0koC;(<n
if (j < size %26amp;%26amp; queue[j] j++; 1%?J l~M
if (queue[k]>queue[j]) file://不用交换 u49v,,WGw
break; bk**% ]
SortUtil.swap(queue,j,k); MMMuT^X
k = j; ng-g\&-
} 7n-;++a5]
} K&t+3O
private void fixUp(int k) { @c<*l+Qc
while (k > 1) { ~f[AEE~,s+
int j = k >> 1; pV>M,f
if (queue[j]>queue[k]) |G+6R-_
break; ;$Eg4uX
SortUtil.swap(queue,j,k); `Ns$HV
k = j; H0zKL]D'>
} =kp-[7
} 6n{`t/
cax]lO
} ~Bll\3-=
[>IAS>
} A8?uCkG
f\W1u#;u)
SortUtil： %<|w:z$vp
n5Ad@Bg
package org.rut.util.algorithm; l .8@F
t;7 tuq
import org.rut.util.algorithm.support.BubbleSort; w`kn!k8
import org.rut.util.algorithm.support.HeapSort; .^<4]
import org.rut.util.algorithm.support.ImprovedMergeSort; k^ CFu
import org.rut.util.algorithm.support.ImprovedQuickSort; _;] 3w
import org.rut.util.algorithm.support.InsertSort; ]]\\Y|0
import org.rut.util.algorithm.support.MergeSort; cxBu2(Y
import org.rut.util.algorithm.support.QuickSort; qSRE)C=)
import org.rut.util.algorithm.support.SelectionSort; !ejLqb
import org.rut.util.algorithm.support.ShellSort; G+^Q _w
sx;7
/** lg)jc3
* @author treeroot qVOlUH
* @since 2006-2-2 ,&Iw5E[
* @version 1.0 ]] R*sd*
*/ -^m]Tb<u
public class SortUtil { c#?JW:^|Df
public final static int INSERT = 1; A.aUWh
public final static int BUBBLE = 2; t(-`==.R
public final static int SELECTION = 3; 0ZY.~b'eu
public final static int SHELL = 4; }<y-`WB
public final static int QUICK = 5; {&_1/
public final static int IMPROVED_QUICK = 6; Ww9%6 #it
public final static int MERGE = 7; 1+1Z]!nG#!
public final static int IMPROVED_MERGE = 8; K !&{k94
public final static int HEAP = 9; F]e]
H1`}3}"
public static void sort(int[] data) { }@ Nurs)%_
sort(data, IMPROVED_QUICK); fiuF!<#;6
} ys+ AY^/
private static String[] name={ (1`z16
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;Kq/[$~0
}; V87?J w%2
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private static Sort[] impl=new Sort[]{ h,-8( S
new InsertSort(), Tx)X\&ij&
new BubbleSort(), t2)S61Vr
new SelectionSort(), zmV5k
new ShellSort(), iNn]~L1
new QuickSort(), Q;m:o8Q5
new ImprovedQuickSort(), [X +E
new MergeSort(), 6#egy|("nF
new ImprovedMergeSort(), *>x~`
new HeapSort() 3z^l
}; T~shJ0%
MO7:ZYq
public static String toString(int algorithm){ ,2H@xji [
return name[algorithm-1]; 0/".2(\}T
} n9.` 5BH7/
h,:8TMJRRN
public static void sort(int[] data, int algorithm) { >Qk4AMIO
impl[algorithm-1].sort(data); cVrses^yE
} y'ZRoakz)
_wa1R+`_
public static interface Sort { ,uEi*s>
public void sort(int[] data); ?NV3]vl
} y:TLGQ0
5ZG-3qj
public static void swap(int[] data, int i, int j) { pNY+E5
int temp = data; yqdhLX|Mk
data = data[j]; zLQplw`#
data[j] = temp; giU6f!%
} 39s%CcI`k
} L;a>J