[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; K5""%O+
} :{lwz#9V
int i1=l; JfY*#({y
int i2=mid+1; ZCiCZ)oc
for(int cur=l;cur<=r;cur++){ {@Mr7*u
if(i1==mid+1) o2 14V\
data[cur]=temp[i2++]; I=Y>z^4
else if(i2>r) (i1JRn-f
data[cur]=temp[i1++]; &p0e)o~Ux
else if(temp[i1] data[cur]=temp[i1++]; &d#R'Z
else t}EMX9SQ
data[cur]=temp[i2++]; qe~x?FO_>
} je4l3Hl
} bDI%}k9#
[K!9xM6
} Gr"CHz/
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改进后的归并排序: ;JW_4;-
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package org.rut.util.algorithm.support; cr7MvXF-
$vO&C6m$
import org.rut.util.algorithm.SortUtil; %u -x9
I.2J-pu}
/** yU?jmJ
* @author treeroot ; * [:~5Wc
* @since 2006-2-2 ~Bd=]a$mj
* @version 1.0 $o^Z$VmL
*/ ,Kit@`P%
public class ImprovedMergeSort implements SortUtil.Sort { 8`Ya7c>
cNs'GfD}
private static final int THRESHOLD = 10; !3v&+Jrf6
vqf$("
/* 92+8zX
* (non-Javadoc) c\bL_
* Ucj?$=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZykMri3bi
*/ W:w~ M'o
public void sort(int[] data) { vW63j't_
int[] temp=new int[data.length]; {h<D/:^v
mergeSort(data,temp,0,data.length-1); }[*'
} yU$MB,1
*6uccx7{
private void mergeSort(int[] data, int[] temp, int l, int r) { ?GhyVXS y.
int i, j, k; 8~sP{V%
int mid = (l + r) / 2; En5oi
if (l == r) [3%mNNk
return; M>Q]{/V7T
if ((mid - l) >= THRESHOLD) 3>,}N9P-v
mergeSort(data, temp, l, mid); !<bwg
else 1GY2aZ@
insertSort(data, l, mid - l + 1); %|Ps|iV
if ((r - mid) > THRESHOLD) k3\N.@\
mergeSort(data, temp, mid + 1, r); D}-.<
else XQ}Zr/f6
insertSort(data, mid + 1, r - mid); Fsx?(?tCMo
Rx%S<i;9
for (i = l; i <= mid; i++) { ^5mc$~1`
temp = data; L9x-90'q,
} v gN!9
for (j = 1; j <= r - mid; j++) { !>UlvT-
temp[r - j + 1] = data[j + mid]; {Gxe%gu6K
} 7 ,Rg~L
int a = temp[l]; :Pud%}'
int b = temp[r]; c:R?da
for (i = l, j = r, k = l; k <= r; k++) { J~YT~D2L
if (a < b) { V+d_1] l
data[k] = temp[i++]; U"oNJ8&%|
a = temp; |WS)KR !
} else { n*4`Tduu^
data[k] = temp[j--]; FLZ9pb[T
b = temp[j]; }D/+YG
} 0=d2_YzSf
} EM,C
} MB plhVK8
"kg`TJf=
/** 7#8Gn=g
* @param data =x~I'|%3
* @param l b@:OlZ~%
* @param i eH&F gmU
*/ ^aFm6HS1
private void insertSort(int[] data, int start, int len) { 9I/b$$?D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MNT~[Z9L5G
} S0$^|/Sr
} N2r zHK
} AerU`^
} Ebg8qDE
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堆排序： V35Vi6*p
|dRVSVN
package org.rut.util.algorithm.support; I[z:;4W}L^
Et>#&Nw8
import org.rut.util.algorithm.SortUtil; qTO6I5u
OLw]BJXYaE
/** xm'9n?
* @author treeroot @sXFu[!U
* @since 2006-2-2 _vQ52H,
* @version 1.0 XTol|a=
*/ UK`A:N2[
public class HeapSort implements SortUtil.Sort{ L"_XWno
=KRM`_QShg
/* (non-Javadoc) TS<d?:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jnH\}IB
*/ XxqGsGx4
public void sort(int[] data) { <}a?<):S
MaxHeap h=new MaxHeap(); +X?ErQm
h.init(data); ~ELY$G.xl
for(int i=0;i h.remove(); =w2 4(S
System.arraycopy(h.queue,1,data,0,data.length); x`CjFaE~F
} 'H1~Zhv
'o$j~Mr
private static class MaxHeap{ Z:4/lx7Bq
,GbmL8P7Y
void init(int[] data){ 56.!L
this.queue=new int[data.length+1]; 0RR|!zEu
for(int i=0;i queue[++size]=data; m_NX[>&Y3
fixUp(size); `FHudSK
} F^ q{[Z
} ldv@C6+J
L3&Ys3-h
private int size=0; )XI[hVUA
X1o",,N^M
private int[] queue; 3bEcKA_z(
y]9R#\P/
public int get() { \i.]-k
return queue[1]; >CB-a :
} ]>3Y~KH(
)|gw5N4;
public void remove() { 3o.x<G(
SortUtil.swap(queue,1,size--); M!&Hn,22
fixDown(1); ;$p!dI\-Q
} IUMv{2C
file://fixdown !pU$'1D
private void fixDown(int k) { fI.|QD*$b
int j; Y2|i>5/|<
while ((j = k << 1) <= size) { 9#8vPjXW}.
if (j < size %26amp;%26amp; queue[j] j++; )>a~%~:
if (queue[k]>queue[j]) file://不用交换 x6ghO-s
break; j#HXuV6
SortUtil.swap(queue,j,k); }1a}pm2p
k = j; ["Zvwes#7
} -FeXG#{)
} <z Gh}.6v
private void fixUp(int k) { Z0gtliJ@
while (k > 1) { ;QI9OcE@/
int j = k >> 1; lu=a e<M
if (queue[j]>queue[k]) wMa8HeBE\
break; %ms%0%
SortUtil.swap(queue,j,k); U-|]A\`)I
k = j; +VwQ=[y]
} hgU;7R,?ir
} mc{z
*d._H1zT
} '%$Vmf)=
vPkLG*d8
} +p u[JHF
{3Inj8a=?A
SortUtil： 1U\ap{z@
]#0 (
package org.rut.util.algorithm; +eVYy_bL-
\JLGw1F
import org.rut.util.algorithm.support.BubbleSort; >ohCz@~
import org.rut.util.algorithm.support.HeapSort; 41 F;X{Br
import org.rut.util.algorithm.support.ImprovedMergeSort; F5)`FM^R
import org.rut.util.algorithm.support.ImprovedQuickSort; x&B&lFmo8
import org.rut.util.algorithm.support.InsertSort; }#z1>y!#
import org.rut.util.algorithm.support.MergeSort; ?v^NimcZ
import org.rut.util.algorithm.support.QuickSort; M/S~"iD
import org.rut.util.algorithm.support.SelectionSort; 4o>y9
import org.rut.util.algorithm.support.ShellSort; Vl.,e1)6
:Cq73:1\B
/** NuZ2,<~9
* @author treeroot Dfs^W{YA
* @since 2006-2-2 =VC18yA
* @version 1.0 =Rd`"]Mnfb
*/ U`v2Yw3E
public class SortUtil { <Iw{fj|
public final static int INSERT = 1; 96WzgHPWo
public final static int BUBBLE = 2; X[tt'5
public final static int SELECTION = 3; s-p)^B
public final static int SHELL = 4; HxI6_>n^I
public final static int QUICK = 5; J4bP(=w!
public final static int IMPROVED_QUICK = 6; !GOaBs
public final static int MERGE = 7; 0X)vr~`
public final static int IMPROVED_MERGE = 8; +\!.X_Ij
public final static int HEAP = 9; %=**cvVy
zlMh^+rMX
public static void sort(int[] data) { )uqzu%T
sort(data, IMPROVED_QUICK); rPH7 ]]
} i>M%)HN
private static String[] name={ aZ@pfWwa:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Pps$=`
}; H cmW
j6%W+;{/pj
private static Sort[] impl=new Sort[]{ XgxE M1(
new InsertSort(), ^s~)"2 g
new BubbleSort(), "GMU~594
new SelectionSort(), ZP";B^J
new ShellSort(), Ow0>qzTg
new QuickSort(), Yp\n=#$[
new ImprovedQuickSort(), 'LgRdtO6
new MergeSort(), A6(Do]M
new ImprovedMergeSort(), G'|ql5Zw
new HeapSort() ^\}MG!l
}; |E+.y&0;
ZRMim6a4X
public static String toString(int algorithm){ vQrxx
return name[algorithm-1]; i6Z7O)V
} V?XQjH1X
St5;X&Q
public static void sort(int[] data, int algorithm) { wFMH\a
impl[algorithm-1].sort(data); @CNJpQ ujn
} pg{VKrT`
F ~A$7
public static interface Sort { Jg#0g eU
public void sort(int[] data); i(~DhXz*T
} BTAbDyH5
h)Y] L#R
public static void swap(int[] data, int i, int j) { 2"&GH1
int temp = data; \,S|>CPQ
data = data[j]; 9'MGv*Ho
data[j] = temp; ni;)6,i
} n)yDep]$G
} M?l v