[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; F52%og~N
} zD#$]?@ b
int i1=l; `SFA`B)[5@
int i2=mid+1; AcZ{B<
for(int cur=l;cur<=r;cur++){ }BF!!*
if(i1==mid+1) dTV4 Q`Z
data[cur]=temp[i2++]; F$L2bgQR?'
else if(i2>r) 1NHiW v
data[cur]=temp[i1++]; &zuPt5G|
else if(temp[i1] data[cur]=temp[i1++]; j,DF' h
else jL9g.q4^
data[cur]=temp[i2++]; o#"U8N%r
} NCW<~
} q=I8W}Zi
l#%qF Db
} #'DrgZ)W
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改进后的归并排序: #$5"&SM
;(&$Iw9X
package org.rut.util.algorithm.support; X8}m %
/KU9sIE;
import org.rut.util.algorithm.SortUtil; *~h@KQm7
{gL8s
/** 7aF'E1e'3
* @author treeroot U yb-feG
* @since 2006-2-2 pZE}<EX
* @version 1.0 QN4{xf:}S
*/ [b2KBww\
public class ImprovedMergeSort implements SortUtil.Sort { .uh>S!X, ]
]%%I=r
private static final int THRESHOLD = 10; CP]nk0
7 XNZEi9o
/* 7 KuUV!\h`
* (non-Javadoc) ~FP4JM,y6
* Kw%to9eh)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u%t/W0xi
*/ .OyzM
public void sort(int[] data) { c-GS:'J{
int[] temp=new int[data.length]; ABx< Ep6
mergeSort(data,temp,0,data.length-1); lfJvN
} c -sc*.&
N8[ &1
private void mergeSort(int[] data, int[] temp, int l, int r) { -dto46X
int i, j, k; *VUD!`F
int mid = (l + r) / 2; H=/;
if (l == r) Sg&0a$
return; {yzo#"4Oy
if ((mid - l) >= THRESHOLD) pZ`^0#Fo
mergeSort(data, temp, l, mid); w@![rH6~F
else `4SwdW n
insertSort(data, l, mid - l + 1); D'8xP %P
if ((r - mid) > THRESHOLD) MyZ5~jnr\
mergeSort(data, temp, mid + 1, r); ]|xfKDu
else AjYvYMA&
insertSort(data, mid + 1, r - mid); (]@yDb4
>P9|?:c
for (i = l; i <= mid; i++) { s![Di
temp = data; Z|#G+$"QV
} wsKOafrV
for (j = 1; j <= r - mid; j++) { 7Dt*++:
temp[r - j + 1] = data[j + mid]; +L\Dh.Ir
} gmqL,H#
int a = temp[l]; [PIh^DhK
int b = temp[r]; h5o6G1ur
for (i = l, j = r, k = l; k <= r; k++) { ~D0e\Q(A
if (a < b) { nk*T x
data[k] = temp[i++]; kEYkd@{
a = temp; n8+_Uww
} else { /;X+<Wj
data[k] = temp[j--]; gLss2i.r
b = temp[j]; <"hq}B
} )KdEl9o
} kgb:<{pJ
} ^KF%Z2:$
@e#{Sm
/** a5k![sw\
* @param data p 2>\
* @param l W9rmAQjn
* @param i !hugn6
*/ f-BPT2U+
private void insertSort(int[] data, int start, int len) { \Dx;AKs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y$K[ArqX
} oHPh2b0
} Yn_v'Os2
} 4[lym,8C
} Xk(p:^ R
YlC$L$%Zd.
堆排序： :^En\YcU
X()yhe_
package org.rut.util.algorithm.support; 4T>d%Tt+)
hnnVp_<]
import org.rut.util.algorithm.SortUtil; Jm`{MzqL
$xqX[ocor
/** Aa`R40yl
* @author treeroot M:*)l(
* @since 2006-2-2 u.@B-Pf[Eo
* @version 1.0 x+bC\,q
*/ @@3%lr71
public class HeapSort implements SortUtil.Sort{ w }=LC#le
pf`vH`r
/* (non-Javadoc) XS(Q)\"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .)c+gyaQ
*/ M^&^g
public void sort(int[] data) { 2{xf{)hO?
MaxHeap h=new MaxHeap(); sh/4ui{
h.init(data); !BjJ5m
for(int i=0;i h.remove(); 'j9x(T1M1
System.arraycopy(h.queue,1,data,0,data.length); u#+Is4Vh
} MMy\u) 4
!y&<IT(\4
private static class MaxHeap{ ++!'6!l
PVi0|
void init(int[] data){ qQwf#&
this.queue=new int[data.length+1]; }vEMG-sxX
for(int i=0;i queue[++size]=data; S=a>rnF
fixUp(size); &9ERlZ(A
} BC)1FxsGf
} bMB@${i}
^@ Xzh:
private int size=0; `PtfPt<{
Kut@z>SK
private int[] queue; Pyp#'du>
f~?kx41dq
public int get() { J(5#fo{Q.g
return queue[1]; T2}X~A
} =<X4LO)C
GGU>={D)
public void remove() { {#,?K
SortUtil.swap(queue,1,size--); ]Jnrs
fixDown(1); W+i&!'
} W.c>("gC
file://fixdown 48)D%867.;
private void fixDown(int k) { gLwrYG7@
int j; .1:B\R((
while ((j = k << 1) <= size) { e3k58
if (j < size %26amp;%26amp; queue[j] j++; r8Z.}<j
if (queue[k]>queue[j]) file://不用交换 UmLBoy&*
break; eWr2UXv$
SortUtil.swap(queue,j,k); hO2W!68
k = j; BU O8Z]
} "..I$R
} TR9dpt+T
private void fixUp(int k) { -VvN1G6.x?
while (k > 1) { W.l#@p
int j = k >> 1; ;0o% hx
if (queue[j]>queue[k]) fwi -
break; 0*,]`A=
SortUtil.swap(queue,j,k); $"g'C8
k = j; t]hfq~Ft
} ,rX|_4n*
} D%=j@
H`4KhdqR
} UHS"{%
K$wxiGg8P
} 6GoQJ
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SortUtil： ))6YOc
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package org.rut.util.algorithm; SNC)cq+{
L\q-Z..
import org.rut.util.algorithm.support.BubbleSort; U^kk0OT^
import org.rut.util.algorithm.support.HeapSort; T~ P<Gq},
import org.rut.util.algorithm.support.ImprovedMergeSort; Yo\%53w/
import org.rut.util.algorithm.support.ImprovedQuickSort; }J6 y NoXu
import org.rut.util.algorithm.support.InsertSort; $mxl&Qr>Q;
import org.rut.util.algorithm.support.MergeSort; $ncP#6
import org.rut.util.algorithm.support.QuickSort; XrJLlH>R4
import org.rut.util.algorithm.support.SelectionSort; )3ZkKv;zY
import org.rut.util.algorithm.support.ShellSort; a28`)17z
[&)*jc16
/** QTU$mC]
* @author treeroot 8{)N%r
* @since 2006-2-2 ;P^}2i[q>[
* @version 1.0 -YS9u[
*/ 7w}]9wCN?
public class SortUtil { W^i[7 r
public final static int INSERT = 1; Nk<H=kw+
public final static int BUBBLE = 2; -PaR&0Tt
public final static int SELECTION = 3; ;pqS|ayl
public final static int SHELL = 4; h*?]A
public final static int QUICK = 5; fs2y$HN
public final static int IMPROVED_QUICK = 6; w& )ApfL
public final static int MERGE = 7; i^)JxEPr w
public final static int IMPROVED_MERGE = 8; KB$Y8[
public final static int HEAP = 9; Qp-P[Tc
bUe6f,8,
public static void sort(int[] data) { ,U>G$G^
sort(data, IMPROVED_QUICK); \=H+m%
} 7 iQa)8,
private static String[] name={ U:gvK8n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^@<Ia-x
}; D2f~*!vEnA
bp'\nso/
private static Sort[] impl=new Sort[]{ |`d-;pk!%
new InsertSort(), |P-kyY34
new BubbleSort(), M %!O)r#Pn
new SelectionSort(), @=K*gbq5
new ShellSort(), q:mqA$n
new QuickSort(), *JO%.QNg
new ImprovedQuickSort(), f.:0T&%G
new MergeSort(), |eksvO'~
new ImprovedMergeSort(), +*G<xW :M
new HeapSort() $\L=RU!c}
}; j07b!j:"\}
} a!HbH
public static String toString(int algorithm){ ->W rBO
return name[algorithm-1]; L$?YbQo7
} A~;+P
2>)::9e4
public static void sort(int[] data, int algorithm) { P}vk5o'
impl[algorithm-1].sort(data); ,Y@4d79
} IO"q4(&;P4
yY!@FGsA
public static interface Sort { o4,9jk$
public void sort(int[] data); ^2nH6,LPS
} %-an\.a.
q*}$1 zb
public static void swap(int[] data, int i, int j) { B-wF1!Jv
int temp = data; L(}/W~En
data = data[j]; 4 ;^
data[j] = temp; ",]A.,
} j|VX6U
} !Hj 7|5