[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; Ed{sC[j=
} 3lEP:Jp
int i1=l; aT+w6{%Z
int i2=mid+1; /d/]#T[Z9
for(int cur=l;cur<=r;cur++){ ksJ 1:_
if(i1==mid+1) ImD&~^-_<
data[cur]=temp[i2++]; 86!$<!I
else if(i2>r) $ER9u2
data[cur]=temp[i1++]; ]0SqLe
else if(temp[i1] data[cur]=temp[i1++]; g[uf e<
else O(9*VoD
data[cur]=temp[i2++]; gjFQDrz(
} -N6ek`
} :XoR~syT
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} L@_o*"&j
PfB9 .f{
改进后的归并排序: *~*"p)`<
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package org.rut.util.algorithm.support; k*C[-5&#
*UXa.kT@
import org.rut.util.algorithm.SortUtil; \PFjw9s
,H<nNBv3M
/** feeHXKD|
* @author treeroot 1'iQlnMO@
* @since 2006-2-2 >6@,L+-6r
* @version 1.0 &3xda1H
*/ ?^^TR/
public class ImprovedMergeSort implements SortUtil.Sort { uq7/G|
^#K^WV
private static final int THRESHOLD = 10; skTtGz8R[
.7:ecFKk
/* R9D2cu,{
* (non-Javadoc) 6+"gk(
* &p*rEs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j~>J?w9<O
*/ R6:m@
public void sort(int[] data) { ipt]qJFd
int[] temp=new int[data.length]; 8Bh micU
mergeSort(data,temp,0,data.length-1); hd[t&?{=
} }odjaM}5Nc
%K7;ePu
private void mergeSort(int[] data, int[] temp, int l, int r) { rY1jC\
int i, j, k; @xso{$z?j
int mid = (l + r) / 2; eb6y-TwY
if (l == r) 1,U)rx$H
return; 0]$-}AYM
if ((mid - l) >= THRESHOLD) 0>e]i[P.
mergeSort(data, temp, l, mid); %nE%^Enw
else <]|!quY<*
insertSort(data, l, mid - l + 1); yX%> %#$
if ((r - mid) > THRESHOLD) 8<KC-|y.
mergeSort(data, temp, mid + 1, r); 4cJ/XgX
else *,*XOd:3TL
insertSort(data, mid + 1, r - mid); gw%L M7yQR
HCe/!2Y/%
for (i = l; i <= mid; i++) { FFmXT/K"/j
temp = data; ,OP\^
} 4!-R&<TLve
for (j = 1; j <= r - mid; j++) { Z@$'fX?~9
temp[r - j + 1] = data[j + mid]; `Hv"^o
} i }Zz[b
int a = temp[l]; E @Rb+8},"
int b = temp[r]; * kUb[
for (i = l, j = r, k = l; k <= r; k++) { a5d_= :S;
if (a < b) { TV0Y{x*~iH
data[k] = temp[i++]; y&\t72C$Fi
a = temp; sb1tQ=u[
} else { oYJ<.Yxeb
data[k] = temp[j--]; cf*~Gx_l
b = temp[j]; JS<w43/j
} Ad>@8^
} $?VYHkX
} qLKL*m
#SjCKQ~
/** De>,i%`Q,D
* @param data -lq`EB+
* @param l 0m\( @2E
* @param i HzuG- V
*/ m`Z.xIA7;
private void insertSort(int[] data, int start, int len) { ycvgF6Me<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +JXn
} A_2lG!! 6
} v;}MHl
} CP$,fj
} ~3-+~y=o~
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堆排序： -yu$Mm
k)8*d{*
package org.rut.util.algorithm.support; YfseX;VX
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import org.rut.util.algorithm.SortUtil; =KD[#au6a
t#-4edB,
/** +Q[SddI
* @author treeroot M-F{I%Vx
* @since 2006-2-2 KF!d?
* @version 1.0 l2wu>Ar7.
*/ d>r]xXB6
public class HeapSort implements SortUtil.Sort{ J*ZcZ FbWN
nvc(<Ovw
/* (non-Javadoc) hQNUA|Q=%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h7m$P^=U
*/ &Wk:>9]Jrb
public void sort(int[] data) { kKDf%=
MaxHeap h=new MaxHeap(); o4LVG
h.init(data); C8}=fa3u
for(int i=0;i h.remove(); vNZ"x)?
System.arraycopy(h.queue,1,data,0,data.length); e ]2GAJLI
} Z7?\ >4V
%j{*`}
private static class MaxHeap{ Eq8:[o
"avG#rsH
void init(int[] data){ R?}%rP+^e
this.queue=new int[data.length+1]; ]!/R tt
for(int i=0;i queue[++size]=data; P86wRq
fixUp(size); vAOThj)
} Wkr31Du\K
} Vyc
qS ggZ0*
private int size=0; PfhKomt"
"{~^EQq,
private int[] queue; J'L6^-gV
SaRn>n\
public int get() { +HD2]~{EkL
return queue[1]; U><$p{)
} gzlRK^5
UjyrmQf
public void remove() { +vV?[e
SortUtil.swap(queue,1,size--); 0[8uuqV[cB
fixDown(1); fN9uSnu
} TIF =fQ
file://fixdown Wi~?2-!
private void fixDown(int k) { }b{7+ + Ah
int j; +]~}kvk:
while ((j = k << 1) <= size) { hxw6^EA
if (j < size %26amp;%26amp; queue[j] j++; GK3cQw
if (queue[k]>queue[j]) file://不用交换 :01B)~^
break; @Yw42`>!s
SortUtil.swap(queue,j,k); e{^lD.E
k = j; '?3(&
} y7'9KQ
} uNqN &7g
private void fixUp(int k) { <^ratz!-
while (k > 1) { ItZ*$I1<
int j = k >> 1; gXY]NWI
if (queue[j]>queue[k]) SR<W3a\
break; tU>7jo[-p
SortUtil.swap(queue,j,k); Oz"_KMz
k = j; "K;""]#wg0
} '=Acg"aT
} tQTjqy{K
#;;A~d:V
} ':f,RG
P"[{s^mb
} KcpQ[6\
a?X@ D<.;
SortUtil： v[jg|s&6"
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package org.rut.util.algorithm; >3I|5kZ6
^t`0ul]c
import org.rut.util.algorithm.support.BubbleSort; y6H`FFqK
import org.rut.util.algorithm.support.HeapSort; }5Km \OI
import org.rut.util.algorithm.support.ImprovedMergeSort; @jZ1WHS_a
import org.rut.util.algorithm.support.ImprovedQuickSort; f'Oj01[
import org.rut.util.algorithm.support.InsertSort; 9j0o)]
import org.rut.util.algorithm.support.MergeSort; <uo@k'
import org.rut.util.algorithm.support.QuickSort; jm'^>p,9G
import org.rut.util.algorithm.support.SelectionSort; -"x@V7X
import org.rut.util.algorithm.support.ShellSort; \J-D@b;
/U0,%
/** FvD/z;N
* @author treeroot ~h3~<p#M`
* @since 2006-2-2 E[FE-{B#
* @version 1.0 KvO5-g
*/ zkd^5A; `
public class SortUtil { =yPV9#(I/
public final static int INSERT = 1; &WS'Me
public final static int BUBBLE = 2; ;RMevVw|
public final static int SELECTION = 3; "cvhx/\1#
public final static int SHELL = 4; g]d0B!Ar~
public final static int QUICK = 5; >^ E*7Bfp
public final static int IMPROVED_QUICK = 6; |!CAxE0d$B
public final static int MERGE = 7; :xY9eq=
public final static int IMPROVED_MERGE = 8; 0aJcX)
public final static int HEAP = 9; f7;<jj;w7
#W4 "^#2
public static void sort(int[] data) { T5dnj&N ]
sort(data, IMPROVED_QUICK); F><ficT
} CbOCL~ "
private static String[] name={ xX.{(er
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s'BlFB n
}; 7s Gf_`Z
P]2V~I/X
private static Sort[] impl=new Sort[]{ &#!1 Y[e^
new InsertSort(), a/[)A _-
new BubbleSort(), l;B
new SelectionSort(), `(E$-m-~jH
new ShellSort(), '*<I<? z;
new QuickSort(), _s}`ohKvD
new ImprovedQuickSort(), .d?LRf
new MergeSort(), O0eM*~zI
new ImprovedMergeSort(), @]Ac >&
new HeapSort() a.a ,_
}; ;R$2+9
!%N@>[
public static String toString(int algorithm){ VL|Z+3L
return name[algorithm-1]; Q!r` G
} Zb:Z,O(vn
D[Q/:_2l
public static void sort(int[] data, int algorithm) { 2G_]Y8
impl[algorithm-1].sort(data); MHA_b^7?
} k:N/-P&+
dfh 1^Go
public static interface Sort { yI/ FD
public void sort(int[] data); Zh`[A9I/
} KxWm63"
0g#xQzE
public static void swap(int[] data, int i, int j) { Y+5aT(6O
int temp = data; bGxHzzU}
data = data[j]; D&qJ@PR
data[j] = temp; @gw8r[
} I__a}|T%
} M C y~~DL