[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; A<*G;
} w~|z0;hC
int i1=l; *.P3fVlZ
int i2=mid+1; (X|`|Y
for(int cur=l;cur<=r;cur++){ S(NUuu}S
if(i1==mid+1) VT:m!<^
data[cur]=temp[i2++]; b&g`AnYT
else if(i2>r) kN8?.V%Utw
data[cur]=temp[i1++]; x7!YA>
else if(temp[i1] data[cur]=temp[i1++]; m&I5~kD
else q% pjY
data[cur]=temp[i2++]; /4{.J=R}
} -;s-*$I
} ^2<nn op
R![)B97^
} {)y8Y9G
F#>^S9Gml
改进后的归并排序: {!av3Pz\
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package org.rut.util.algorithm.support; XJ*W7HD
:ySQ[AJ"
import org.rut.util.algorithm.SortUtil; F7N4qq1
-guVl4 V
/** Z5[f
* @author treeroot %:=Jr#a
* @since 2006-2-2 S!{Kn ;@
* @version 1.0 tLc~]G*\`s
*/ jHx)q|2\
public class ImprovedMergeSort implements SortUtil.Sort { ?S0gazZm
y^tp^
private static final int THRESHOLD = 10; \?K>~{)
5Vu@gRk_
/* \!Fx,#r$7-
* (non-Javadoc) uEE#A0
* >XomjU[srQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V+MhS3VD
*/ 1}DUe.a
public void sort(int[] data) { >G<.^~o
int[] temp=new int[data.length]; j87IxB?o
mergeSort(data,temp,0,data.length-1); 1v"r8=Wt
} \*x=q20
uJ_"gPO
private void mergeSort(int[] data, int[] temp, int l, int r) { @;T?R
int i, j, k; 1Zi(5S)
int mid = (l + r) / 2; (Gp|K6
if (l == r) 6( ~DS9
return; >^V3Z{;
if ((mid - l) >= THRESHOLD) +f]\>{o4
mergeSort(data, temp, l, mid); 7nOn^f D
else AOVoOd+6
insertSort(data, l, mid - l + 1); ]>'yt #]
if ((r - mid) > THRESHOLD) 3!<} -sW4
mergeSort(data, temp, mid + 1, r); <Q%:c4N
else ?[~)D}] j
insertSort(data, mid + 1, r - mid); x}*Y =Xh
vo3[)BDbT
for (i = l; i <= mid; i++) { -7\6j#;l
temp = data; ;DN:AgXP
} OK1f Y`$z
for (j = 1; j <= r - mid; j++) { n?z^"vv$i
temp[r - j + 1] = data[j + mid]; AfOq?V
} u*C"d1v=
int a = temp[l]; C~([aH@-I
int b = temp[r]; ab-MEN`5
for (i = l, j = r, k = l; k <= r; k++) { sXmo.{Ayb
if (a < b) { y|0I3n]e
data[k] = temp[i++]; /@~&zx&_
a = temp; y+D"LeCAad
} else { 3V2w1CERE
data[k] = temp[j--]; j"Vb8}
b = temp[j]; 9CW8l0
} YTo^Q&
} ;rJ
} 9X[}ik0
y+ZCuX
/** q=|0lZ$`V_
* @param data R404\XGL
* @param l sxBRg=
* @param i Hz] p]
*/ DJ#z0)3<p
private void insertSort(int[] data, int start, int len) { {Vj25Gt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DZ9qIc}Y
} TV&4m5
} {aRZBIv
} O&c~7tM%
} $xsmF?Dsx5
QW_QizR>|
堆排序： *E-VS= #
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package org.rut.util.algorithm.support; g :Z, ab4
]p.eFYDh7
import org.rut.util.algorithm.SortUtil; T1}9^3T?{
YvP u%=eF
/** [ queXDn"m
* @author treeroot wcI4Y0+J
* @since 2006-2-2 WP-'gC6K=
* @version 1.0 .Iret:
*/ !agtgS$qII
public class HeapSort implements SortUtil.Sort{ /\B[lRn
gUq)M
/* (non-Javadoc) {=Ku9\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x# &ZGFr~
*/ At#'q>Dn
public void sort(int[] data) { V^^nJs tV
MaxHeap h=new MaxHeap(); `Wf)qMb
h.init(data); Nu%JI6&R
for(int i=0;i h.remove(); [@_zsz,`L
System.arraycopy(h.queue,1,data,0,data.length); RL;>1Q,H
} 9u\&kQxqD
D|Tv`47ntu
private static class MaxHeap{ `Y`QxU!d%
pdrF/U+
void init(int[] data){ L'JEkji"
this.queue=new int[data.length+1]; 7v~\c%1V
for(int i=0;i queue[++size]=data; F ;m1I+;
fixUp(size); Jc#()4
} %Jr6pmc
} = +uUWJ&1G
VK)K#!O8
private int size=0; 5_mb+A n,
1Jx|0YmO
private int[] queue; Kb#}f/
3GSoHsNk
public int get() { Ye8&cZ*.
return queue[1]; sDH|k@K
} ')ErXLP_
w]{NaNIeq1
public void remove() { }0({c~z\
SortUtil.swap(queue,1,size--); ]bq<vI%
fixDown(1); 8'2lc
} PG1#Z?_
file://fixdown s)e; c<(/
private void fixDown(int k) { p5KM(N6f
int j; f]BG`rJX
while ((j = k << 1) <= size) { E&/D%}Wl
if (j < size %26amp;%26amp; queue[j] j++; "5-S:+
if (queue[k]>queue[j]) file://不用交换 hOX$|0i
break; 1MV\ ^l_
SortUtil.swap(queue,j,k); $UZ4,S?V
k = j; 35;)O -
} BHwQB2t gc
} cs?@Ri=g
private void fixUp(int k) { jG3}V3|.
while (k > 1) { S"iQQV{)Z
int j = k >> 1; vYD>m~Qc^
if (queue[j]>queue[k]) t:X[Blw3$
break; GLe(?\Ug=
SortUtil.swap(queue,j,k); *mM+(]8US
k = j; bT@7&
} V;Zp3Qo!
} fNi&1J-/
Hy<4q^3$G
} ] =jnt
3:rH1vG.m
} j/bebR}X
sBuVm<H
SortUtil： g#V3u=I8~
d0b--v/
package org.rut.util.algorithm; 2O|o%`?
G6zFCgFJ^y
import org.rut.util.algorithm.support.BubbleSort; gz[Ng> D+
import org.rut.util.algorithm.support.HeapSort; V 'Gi2gNaP
import org.rut.util.algorithm.support.ImprovedMergeSort; @NXGVmY1}
import org.rut.util.algorithm.support.ImprovedQuickSort; -K`0`n}
import org.rut.util.algorithm.support.InsertSort; .~a)
import org.rut.util.algorithm.support.MergeSort; %8kbX
import org.rut.util.algorithm.support.QuickSort; qFV=Pk
import org.rut.util.algorithm.support.SelectionSort; x7J|
import org.rut.util.algorithm.support.ShellSort; rbnu:+!
UcMe("U
/** C"/]X
* @author treeroot N1I1!!$K;%
* @since 2006-2-2 G{rUqo
* @version 1.0 v&U'%1|
*/ }Kq5!XJV9C
public class SortUtil { eb:mp/
public final static int INSERT = 1; >R?EJ;h
public final static int BUBBLE = 2; 181-m7W
public final static int SELECTION = 3; {Gs&u>>R"^
public final static int SHELL = 4; 4yC{BRbi
public final static int QUICK = 5; VG'oy
public final static int IMPROVED_QUICK = 6; Q=yQEh|Y
public final static int MERGE = 7; Dd*T5A?
public final static int IMPROVED_MERGE = 8; HPAg1bV:-
public final static int HEAP = 9; -9{}rE
y^zVb\"4
public static void sort(int[] data) { Vzz0)`*hQ
sort(data, IMPROVED_QUICK); Yuze9b\[
} g~%=[1
private static String[] name={ O'm&S?>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @]dN
}; +*g[hRw[
`4Z#/g
private static Sort[] impl=new Sort[]{ K+H?,I
new InsertSort(), Z>a_vC
new BubbleSort(), 0i$jtCCL(
new SelectionSort(), kT UQ8U
new ShellSort(), 9U58#
new QuickSort(), /U)w:B+p/g
new ImprovedQuickSort(), K4xZT+Qb
new MergeSort(), %yQ-~T@
new ImprovedMergeSort(), *ZGQ`#1.X6
new HeapSort() x}1(okc
}; )xP]rOT
ls,gQ]B:P
public static String toString(int algorithm){ Bl'
return name[algorithm-1]; l~&efAJ-$
} `R8~H7{I6
~MO'%'@
public static void sort(int[] data, int algorithm) { 9XS+W w7
impl[algorithm-1].sort(data); vsoj] R$C
} [_qBp:_j?s
,^|+n()O
public static interface Sort { e\.|d<N?
public void sort(int[] data); pZGso
} 5cyl:1Ln
.4F(Y_c
public static void swap(int[] data, int i, int j) { t2+m7*76
int temp = data; nI.#A
data = data[j]; -H.;73Kb[
data[j] = temp; #>~$`Sg
} guSgTUJ}
} NEZF q?