[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; ]>~.U~
} ?c8~VQaQ
int i1=l; *9n[#2sM<
int i2=mid+1; %E%=Za
for(int cur=l;cur<=r;cur++){ [],[LkS
if(i1==mid+1) Qy:yz
data[cur]=temp[i2++]; URVW5c
else if(i2>r) @JSWqi>
data[cur]=temp[i1++]; /o4_rzR?
else if(temp[i1] data[cur]=temp[i1++]; HK[%'OQ
else s$(%]~P
data[cur]=temp[i2++]; gNr4oOR{
} 4<s;xSCL
} OXLB{|hH80
4b}p[9k
} IEm?'o:
Cx;it/8+
改进后的归并排序: Z*Ffdh>*:&
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package org.rut.util.algorithm.support; -, +o*BP
*l d)nH{
import org.rut.util.algorithm.SortUtil; ta&z lZt
Ie!KIU
/** 6ud?US(
* @author treeroot moM'RO,M
* @since 2006-2-2 xDe^>(,"
* @version 1.0 p cD}SY
*/ y6am(ugE
public class ImprovedMergeSort implements SortUtil.Sort { <w&'E6mU
YEV;GFI1
private static final int THRESHOLD = 10; J|xXo
N_D=j6B
/* ;R >>,&g
* (non-Javadoc) jYU0zGpj
* pYCMJK-H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T72Li"00
*/ |%4nU#GoB
public void sort(int[] data) { tDAX pi(
int[] temp=new int[data.length]; ~RLjL"
mergeSort(data,temp,0,data.length-1); PM*lnd#J
} nkq{_;xp
>a@1y8B
private void mergeSort(int[] data, int[] temp, int l, int r) { Z+R-}<
int i, j, k; U;&s=M0[
int mid = (l + r) / 2; "=?JIQ
if (l == r) H|s Iw:
return; 0lt1/PEKx2
if ((mid - l) >= THRESHOLD) SFWS<H(IN
mergeSort(data, temp, l, mid); 7<jr0)
else 3 } $9./+
insertSort(data, l, mid - l + 1); 3Mh_&%!O
if ((r - mid) > THRESHOLD) @bkSA
mergeSort(data, temp, mid + 1, r); {w>ofyqfp&
else Uwiy@T Z
insertSort(data, mid + 1, r - mid); bAY>o
uF,%N
for (i = l; i <= mid; i++) { _z^&zuO
temp = data; #SLiv
} =w7k@[Bq
for (j = 1; j <= r - mid; j++) { Wi)N/^;n
temp[r - j + 1] = data[j + mid]; N}bZdE9F
} #I yM`YB0
int a = temp[l]; 4>=Y@z
int b = temp[r]; 1\f8-:C
for (i = l, j = r, k = l; k <= r; k++) { NnZ_x>R
if (a < b) { "(F:'J} X
data[k] = temp[i++]; bxz6 >>
a = temp; TAM`i3{D
} else { ;f3))x
data[k] = temp[j--]; wu0JXB%&^
b = temp[j]; '\7&Iz:%
} 1p>&j%dk
} T7G{)wm
} "'8o8g
UJX5}36
/** 4pu>f.
* @param data 9hwn,=Vh)
* @param l ">I50#bT
* @param i `Oi6o[a
*/ `4]-B@ 7_
private void insertSort(int[] data, int start, int len) { Xo4K!U>TzZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =dC5q{
} %}~Ncn_r
} `WU"*HqW
} [k +fkr]
} V,9UOC,Gn
o@\q6xl.
堆排序： k3"Y!Uha:
wmS:*U2sc
package org.rut.util.algorithm.support; Y1FP |
nIP*yb}5
import org.rut.util.algorithm.SortUtil; +Y^/0=6h
~_L_un.R
/** Jqi^Z*PuX
* @author treeroot T*C]:=)
* @since 2006-2-2 HQ8;d9cGir
* @version 1.0 2}R)0][W
*/ FZtIC77X5
public class HeapSort implements SortUtil.Sort{ 3m`y?Dd
yX8$LOjE
/* (non-Javadoc) VJ(#FA2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H]W59-{a
*/ [<{+tAdn)
public void sort(int[] data) { {7X80KI
MaxHeap h=new MaxHeap(); ugt|'i
h.init(data); NvfQa6?;
for(int i=0;i h.remove(); 6ax|EMw
System.arraycopy(h.queue,1,data,0,data.length); S(*SUH
} pEE.%U
&P{[22dQ
private static class MaxHeap{ _gF )aE
Dos`lh
void init(int[] data){ pTJJ.#$CEF
this.queue=new int[data.length+1]; {)0"?$C_H
for(int i=0;i queue[++size]=data; t1YVE%`w
fixUp(size); 3v%V\kO=F
} ]T! >]
} W`-AN}C#
mMvt#+O
private int size=0; l;SqjkN
h~ =UFE%'
private int[] queue; Wf=D'6w
x;Jy-hMNl
public int get() { AA um1xl
return queue[1]; _0<EbJ8Z
} XaV h.
X)|b_3Z
public void remove() { 3R[5prE<
SortUtil.swap(queue,1,size--); n15F4DnP
fixDown(1); ]QS?fs Z
} f6ad@2
file://fixdown xCMcS~ 3/
private void fixDown(int k) { ayJKt03\O\
int j; RS~jHwIh
while ((j = k << 1) <= size) { gI qYIt
if (j < size %26amp;%26amp; queue[j] j++; bCF"4KXK
if (queue[k]>queue[j]) file://不用交换 c?{&=,u2
break; VMUK|pC4K
SortUtil.swap(queue,j,k); v'*#P7%Kf
k = j; S&% GB
} N4Z%8:"pj
} lmZSsx
private void fixUp(int k) { 9air"4
while (k > 1) { gD0 FRKn
int j = k >> 1; :Uf\r `a9
if (queue[j]>queue[k]) %11&8Fp1s
break; ;5A
SortUtil.swap(queue,j,k); sHSZIkB-r
k = j; Ms.1RCup
} wG4=[d
} HgP9evz,0
PYYOC"$
} y8uB>z+#+;
`Pv[A
} Cyg\FHs
cWSiJr):r
SortUtil： pDO&I]S`q0
vlAYKtl3]
package org.rut.util.algorithm; q"@Y2lhD!
`w1|(Sk$h
import org.rut.util.algorithm.support.BubbleSort; -9)<[>:
import org.rut.util.algorithm.support.HeapSort; 7yLO<o?9w
import org.rut.util.algorithm.support.ImprovedMergeSort; :4PK4D s7
import org.rut.util.algorithm.support.ImprovedQuickSort; y|1,h}H^n
import org.rut.util.algorithm.support.InsertSort; A"8`5qa
import org.rut.util.algorithm.support.MergeSort; SyFOf
import org.rut.util.algorithm.support.QuickSort; sG`:mc~0
import org.rut.util.algorithm.support.SelectionSort; E`3yf9"
import org.rut.util.algorithm.support.ShellSort; 4i>sOP3 B
j'#M'W3@
/** |-l)$i@
* @author treeroot st"uD\L1p:
* @since 2006-2-2 /l-lkG5
* @version 1.0 ]42bd
*/ ?+)O4?#
public class SortUtil { sBGYgBu!a
public final static int INSERT = 1; I6d4<#Q@L
public final static int BUBBLE = 2; sf\p>gb
public final static int SELECTION = 3; 6vySOVMj
public final static int SHELL = 4; 8y5iT?.~vy
public final static int QUICK = 5; E^aHe
public final static int IMPROVED_QUICK = 6; _Gv[ D
public final static int MERGE = 7; pZ?7'+u$L
public final static int IMPROVED_MERGE = 8; <RfPd+</
public final static int HEAP = 9; ^W|B Xxo
E?1"&D m
public static void sort(int[] data) { 5|>FM&
sort(data, IMPROVED_QUICK); 1Uzsw
} e"9u}-Q@
private static String[] name={ eHUr!zH:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" al<[iZ
}; Fdsaf[3[v
SXfuPM
private static Sort[] impl=new Sort[]{ GMqeC
new InsertSort(), /g}2QmvH
new BubbleSort(), tJ>|t hk
new SelectionSort(), gPs%v`y)*D
new ShellSort(), :td#zM
new QuickSort(), byz2u
new ImprovedQuickSort(), VPG+]>*
new MergeSort(), d7 )&Z:
new ImprovedMergeSort(), ]PQ] f*Ik>
new HeapSort() Y0`@$d&n
}; gFR9!=,/V%
wLyQ <[$
public static String toString(int algorithm){ 4FK|y&p4r
return name[algorithm-1]; WqX#T
} tHlKo0S$0
NV 6kj=r
public static void sort(int[] data, int algorithm) { 6[g~p< 8n}
impl[algorithm-1].sort(data); /5 rWcX
} DA'A-C2
[C)JI;\
public static interface Sort { ~Q7)6%
public void sort(int[] data); (#6E{@eq
} |3\$\qa
MRzrZZ%LQ
public static void swap(int[] data, int i, int j) { W\xM$#)m
int temp = data; H"hL+F^
data = data[j]; d4@\5<
data[j] = temp; V_Owi5h
} uYW9kw>$
} !FwR7`i