[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; Icx)+Mq
} bRJ]avR
int i1=l; u}7r\MnwK,
int i2=mid+1; 8\bZ?n#dn
for(int cur=l;cur<=r;cur++){ S-79uo
if(i1==mid+1) Yez
data[cur]=temp[i2++]; =j@8/
else if(i2>r) 91ec^g
data[cur]=temp[i1++]; ;I>77gi`]
else if(temp[i1] data[cur]=temp[i1++]; p+;x&h)[l
else N::.o+1
data[cur]=temp[i2++]; lWFm>DiLY
} 0C717
} &>Z p}.V
scZ'/(b-E
} ;nb>IL
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改进后的归并排序: nz`"f,
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package org.rut.util.algorithm.support; h)T-7b
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import org.rut.util.algorithm.SortUtil; &.:yP3
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/** 4OdK@+-8U
* @author treeroot _LLE~nUK"/
* @since 2006-2-2 m A|"
* @version 1.0 DO? bJ01
*/ [~ |e:
public class ImprovedMergeSort implements SortUtil.Sort { Y0nuwX*{
nHB`<B
private static final int THRESHOLD = 10; l5_%Q+E_
nb|"dK|
/* D"n 3If%
* (non-Javadoc) 1;9 %L@
* G$ Ii
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,DbT4Ul c
*/ Uf-`g>
public void sort(int[] data) { [>f4&yY
int[] temp=new int[data.length]; Y&DC5T]
mergeSort(data,temp,0,data.length-1); :6Sb3w5h
} |p+ xM
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private void mergeSort(int[] data, int[] temp, int l, int r) { yO09NQ 5u
int i, j, k; `!g XA.9Uv
int mid = (l + r) / 2; -\=kd {*B
if (l == r) Yim`3>#t
return; AT,?dxP J
if ((mid - l) >= THRESHOLD) &:*|KxX
mergeSort(data, temp, l, mid); [+v}V ,jb
else f<G:}I
insertSort(data, l, mid - l + 1); eEkbD"Q
if ((r - mid) > THRESHOLD) b."1p7'
mergeSort(data, temp, mid + 1, r); cX/["AM
else v:$Y |mh
insertSort(data, mid + 1, r - mid); zbL6TP@=
FzGla})
for (i = l; i <= mid; i++) { ~WG#Zci-
temp = data; 2*1s(Jro
} t Sf`
for (j = 1; j <= r - mid; j++) { (Dx]!FFz
temp[r - j + 1] = data[j + mid]; APR%ZpG
} D2}nJFR ]
int a = temp[l]; oXkxd3
int b = temp[r]; ,, G6L{&Z
for (i = l, j = r, k = l; k <= r; k++) { +Ss|4O}'
if (a < b) { ?(CMm%(8
data[k] = temp[i++]; _'E,g@
a = temp; -3T6ck
} else { Xpd^^
data[k] = temp[j--]; GlVD!0
b = temp[j]; ]OOL4=b
} >_$DKY>$`
} v+|N7
} 5? s$(Lt~
Gm.n@U p
/** @u2nG:FG
* @param data @E$PjdB5M
* @param l {>cO&eiCt
* @param i \5_7!.
*/ 0iX;%SPYz
private void insertSort(int[] data, int start, int len) { rsR0V+(W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "3v[\M3
} n(b(H`1n
} 5Qik{cWxBq
} 8]N+V:
} \@4_l?M
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堆排序： rQbL86+
iG*/m><-
package org.rut.util.algorithm.support; +]Y&las
|Y!#`
import org.rut.util.algorithm.SortUtil; "Kz=ZC
sSi1;9^o
/** ^Q]*CU+C
* @author treeroot lV-7bZ
* @since 2006-2-2 ":*PC[)W
* @version 1.0 Poacd;*
*/ */n)_
public class HeapSort implements SortUtil.Sort{ 0EYK3<k9!
ho_;;y
/* (non-Javadoc) )>Oip
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @#}9?>UV
*/ !p1OBS|
public void sort(int[] data) { `av8|;
MaxHeap h=new MaxHeap(); $L.0$-je4
h.init(data); B3'qmi<
for(int i=0;i h.remove(); l,*v/95h
System.arraycopy(h.queue,1,data,0,data.length); ky#d`
} a4X J0Tm
T"'"T]^ X
private static class MaxHeap{ glh2CRUj
I;L$Nf{v
void init(int[] data){ 4em7PmT
this.queue=new int[data.length+1]; sf]y\_zU
for(int i=0;i queue[++size]=data; TdP_L/>|J
fixUp(size); O9]j$,i
} ( =->rP
} =Ow}MX
>/EmC3?b!
private int size=0; j_\sdH*r
Ywt_h;:
private int[] queue; J /'woc
er^z:1'
public int get() { dh%C@n:B
return queue[1]; x$AF0xFO
} +M (\R?@gr
;'dw`)~jQ
public void remove() { 6!/e_a
SortUtil.swap(queue,1,size--); ,Z#t-?
fixDown(1); Q$W0>bUP
} U}6'_ PRQ
file://fixdown KSuP'.l
private void fixDown(int k) { rOB-2@-
int j; &7T0nB/)
while ((j = k << 1) <= size) { WYwsTsG{_
if (j < size %26amp;%26amp; queue[j] j++; UMo=bs
if (queue[k]>queue[j]) file://不用交换 x';6
break; 6CLrP} u
SortUtil.swap(queue,j,k); (}"r 5
k = j; %]>c4"H
} r`i<XGPJ%
} Mvrc[s+o
private void fixUp(int k) { $B*Ek>EK
while (k > 1) { b'O>&V`
int j = k >> 1; Tm_AoZH
if (queue[j]>queue[k]) WDSkk"#TF
break; 4t|g G`QW7
SortUtil.swap(queue,j,k); Yp./3b VO
k = j; R"Hhc(H
} D.j'n-yw
} OTL=(k
lOPCM1Se
} Eg5|XV
nE+sbfC
} R?Ki~'k=
iT%aAVs
SortUtil： qWGnIPk
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package org.rut.util.algorithm; c\-5vw||b
X7?p$!M6;B
import org.rut.util.algorithm.support.BubbleSort; %8>s:YG
import org.rut.util.algorithm.support.HeapSort; 5.]+K<:h"A
import org.rut.util.algorithm.support.ImprovedMergeSort; S WVeUL#5
import org.rut.util.algorithm.support.ImprovedQuickSort; [95(%&k.Q
import org.rut.util.algorithm.support.InsertSort; ,_r"=>?@
import org.rut.util.algorithm.support.MergeSort; \$/)o1SG
import org.rut.util.algorithm.support.QuickSort; 7!#x-KR~5
import org.rut.util.algorithm.support.SelectionSort; G`8gI)$u
import org.rut.util.algorithm.support.ShellSort; JWr:/?
6,G1:BV{K
/** VtUe$ft
* @author treeroot e ,/I}W
* @since 2006-2-2 j5|_SQOmt
* @version 1.0 1Zx|SBF
*/ 2BXpk^d5y
public class SortUtil { 6B)(kPW
public final static int INSERT = 1; ;3U-ghj
public final static int BUBBLE = 2; {2vk<
public final static int SELECTION = 3; @H= d8$
public final static int SHELL = 4; ]iRE^o6
public final static int QUICK = 5; YFv/t=`
public final static int IMPROVED_QUICK = 6; S 3Tp__
public final static int MERGE = 7; QzPq^
public final static int IMPROVED_MERGE = 8; {(w/_C9
public final static int HEAP = 9; o%i^t4J$e
(wEaa'XL
public static void sort(int[] data) { mM!'~{r[-
sort(data, IMPROVED_QUICK); T1m"1Q
} {E-.W"t4
private static String[] name={ ];Z)=y,vM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u=z$**M^
}; +D[|L1{xb
6v(}<2~
private static Sort[] impl=new Sort[]{ .+MJ' bW
new InsertSort(), _Db=I3.HJ
new BubbleSort(), y >r7(qg
new SelectionSort(), dF:@BEo
new ShellSort(), {YC!pDG
new QuickSort(), 'MRvH lCM
new ImprovedQuickSort(), oGM Ls
new MergeSort(), /x,gdZPX
new ImprovedMergeSort(), ^q5~;_z|
new HeapSort() k"\%x=#
}; Aayh'xQ
_*7h1[,{f
public static String toString(int algorithm){ [bk2RaX:i
return name[algorithm-1]; [zl@7X1{_
} :i_818h!?[
3I&=1o
public static void sort(int[] data, int algorithm) { {a^A-Xh[u
impl[algorithm-1].sort(data); #"-?+F=rk
} D9,609w
BZejqDr*
public static interface Sort { lffp\v{w
public void sort(int[] data); Gdmh#pv
} IROX]f}r(
]E'BFon
public static void swap(int[] data, int i, int j) { vw5f.8T;w
int temp = data; 6r! Y ~\@
data = data[j]; +^ a9i5
data[j] = temp; O4RNt,?l
} psyxNM=dN#
} CF"$&+s9