[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; fP9k(mQX
} fDa$TbhjI
int i1=l; vj:hMPC ZM
int i2=mid+1; g}hR q%
for(int cur=l;cur<=r;cur++){ qt#a_F*rV
if(i1==mid+1) Y=6b oT
data[cur]=temp[i2++]; K)`\u7Bu
else if(i2>r) L,F )l2
data[cur]=temp[i1++]; G*f5B
else if(temp[i1] data[cur]=temp[i1++]; 2 #+g4
else VK)K#!O8
data[cur]=temp[i2++]; 5_mb+A n,
} 1Jx|0YmO
} wPl!}HNf
o5N];Nj
} 8;YN`S!o
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改进后的归并排序: Va1 eG]jQ
L/.$0@$bv
package org.rut.util.algorithm.support; mmVx',k
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import org.rut.util.algorithm.SortUtil; lj1wTiaI(
h|!F'F{
/** n+EK}=DK
* @author treeroot ?CQ\94kO
* @since 2006-2-2 oR=^NEJv
* @version 1.0 Ass8c]H@
*/ <Dr*^GX>?
public class ImprovedMergeSort implements SortUtil.Sort { ,cvLvN8
gJyFt8Z<
private static final int THRESHOLD = 10; QPH2TXw
M-2:$;D
/* "$Wi SR
* (non-Javadoc) <9S?wju4W'
* KJwkkCE/=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I]`>m3SJ
*/ 2wWL]`(E
public void sort(int[] data) { z:aT5D
int[] temp=new int[data.length]; COw]1R
mergeSort(data,temp,0,data.length-1); 9GdrJ~h
} S!GjCog^J
H>-?/H
private void mergeSort(int[] data, int[] temp, int l, int r) { xy%lp{
int i, j, k; ua['rOnU
int mid = (l + r) / 2; dQ8}mH!
if (l == r) {.N" 6P
return; #lax0IYY=
if ((mid - l) >= THRESHOLD) #zcp!WE.OI
mergeSort(data, temp, l, mid); eo4<RDe<
else `F>1xMm
insertSort(data, l, mid - l + 1); 62}bs/%
if ((r - mid) > THRESHOLD) &Z+a (
mergeSort(data, temp, mid + 1, r); )>ed6A1
else [|2uu."$
insertSort(data, mid + 1, r - mid); E(M\U5o:
[H#I:d-+\
for (i = l; i <= mid; i++) { xa#:oKF3
temp = data; 5hE8b {V
} yKO84cSl
for (j = 1; j <= r - mid; j++) { /FiFtAbb
temp[r - j + 1] = data[j + mid]; q4$R?q:^
} rG"}CX`]:
int a = temp[l]; aW3yl}`{
int b = temp[r]; Osb"$8im
for (i = l, j = r, k = l; k <= r; k++) { G{rUqo
if (a < b) { v&U'%1|
data[k] = temp[i++]; }Kq5!XJV9C
a = temp; eb:mp/
} else { :y'D] ,_
data[k] = temp[j--]; _tQ=ASe0
b = temp[j]; /n7F]Ok'*
} *?gn@4Ly
} V|{ )P@Q
} #kX=$Bzk
joifIp_
/** =MG
* @param data )\uy 0+b
* @param l 5cP]
* @param i p;) ;Vm+8
*/ -o F#a 8
private void insertSort(int[] data, int start, int len) { _c%]RE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UJoWTx
} c?d+>5"VX
} 4i[3|hv'
} {R[lsdH(X
} 0-g,C=L
K+H?,I
堆排序： Z>a_vC
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package org.rut.util.algorithm.support; T}P|uP
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import org.rut.util.algorithm.SortUtil; (@M=W.M#
H(]lqvO
/** bE^Z;q19
* @author treeroot L5cNCWpo
* @since 2006-2-2 y]?%2ud/=
* @version 1.0 9L?EhDcDV
*/ ~sAINV>A
public class HeapSort implements SortUtil.Sort{ mn" a$
;4F[*VF!w
/* (non-Javadoc) <HG~#oBRq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bw"L!sZ
*/ !cnH|ePbI
public void sort(int[] data) { f9JD_hhP'
MaxHeap h=new MaxHeap(); s.KJYP
h.init(data); " %|CD"@
for(int i=0;i h.remove(); {Y'DUt5j
System.arraycopy(h.queue,1,data,0,data.length); RgQ\Cs24Q
} Yq/|zTe{
QE!cf@~n"
private static class MaxHeap{ |82V`CV
>Q+a'bd w
void init(int[] data){ ,D3q8?j
this.queue=new int[data.length+1]; "S[VtuxPCU
for(int i=0;i queue[++size]=data; "SyyOD )WA
fixUp(size); nH% /
} y~1UU3k5
} Ft`#]=IS
yN~=3b>
private int size=0; "6pjkEt4
;pb~Zk/[,w
private int[] queue; 8.jd'yp*J
V* fDvr0
public int get() { Dw[w%uz
return queue[1]; GFlsI-*`
} fQuphMOl6
KfWVz*DC!
public void remove() { |fTQ\q]W
SortUtil.swap(queue,1,size--); r9s1\7]x
fixDown(1); V}9wx%v
} &J"a`l2
file://fixdown %)l2dK&9"j
private void fixDown(int k) { N~M:+\
int j; K N0S$nW+
while ((j = k << 1) <= size) { sNX$ =<E
if (j < size %26amp;%26amp; queue[j] j++; .,m$Cm
if (queue[k]>queue[j]) file://不用交换 +#Ov9b
break; K~,,xsy,G&
SortUtil.swap(queue,j,k); [b;Oalw
k = j; Ylt[Ks<2
} %F&j B
} g:;v]
private void fixUp(int k) { S3qUzK
while (k > 1) { g"C$B Fc
int j = k >> 1; r7ywK9UL
if (queue[j]>queue[k]) tk}qvW.Ii
break; ,*S?L qv^
SortUtil.swap(queue,j,k); 3tIIBOwg[
k = j; 1oX"}YY1
} ~Zaxn~u:
} sur2Mw(M"
rM bb%d:
} ,=6Eju#P
@[ :sP
} VWfrcSZg6M
mW8CqW\Q5
SortUtil： RNX}Wlo-s
[.<vISRir
package org.rut.util.algorithm; zy$hDy0
)\VUAD%~e7
import org.rut.util.algorithm.support.BubbleSort; ,~G _3Oz
import org.rut.util.algorithm.support.HeapSort; CF42KNq
import org.rut.util.algorithm.support.ImprovedMergeSort; YLobBtXc9
import org.rut.util.algorithm.support.ImprovedQuickSort; Ubn5tN MK
import org.rut.util.algorithm.support.InsertSort; i7fpl
import org.rut.util.algorithm.support.MergeSort; b>2u>4
import org.rut.util.algorithm.support.QuickSort; V!},a@>p
import org.rut.util.algorithm.support.SelectionSort; 'd6hQ4Vw4
import org.rut.util.algorithm.support.ShellSort; "_#%W oo
-Qn:6M>w^
/** D;d;:WT5
* @author treeroot C7+TnJ
* @since 2006-2-2 k9R1E/;
* @version 1.0 1Tiq2+hmf
*/ pd7FU~-
public class SortUtil { >Q5 SJZ/
public final static int INSERT = 1; h Qu9ux
public final static int BUBBLE = 2; kN]#;R6
public final static int SELECTION = 3; P'Y8 t
public final static int SHELL = 4; @KS:d\l}U
public final static int QUICK = 5; mDV 2vg
public final static int IMPROVED_QUICK = 6; ^Gd<miw
public final static int MERGE = 7; 9w0 ^=
public final static int IMPROVED_MERGE = 8; n:<avl@o<
public final static int HEAP = 9; {v`wQM[
CSsb~/Oxu
public static void sort(int[] data) { t 8M3VGN
sort(data, IMPROVED_QUICK); W8":lpp
} 7d4RtdI
private static String[] name={ *"e[au^8*b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Zs{ `Yf^Q
}; )Fm
sgB3i`_M
private static Sort[] impl=new Sort[]{ O^:Pr8|{J
new InsertSort(), Y_)04dmr@[
new BubbleSort(), 4G`YZZQ
new SelectionSort(), B:x4H}`vh
new ShellSort(), P_ZguNH
new QuickSort(), n.A[Z
new ImprovedQuickSort(), /VJ@`]jhDf
new MergeSort(), `DA=';>Y
new ImprovedMergeSort(), _t;w n7p
new HeapSort() M6X f}>
}; WHpbQQX
#K)HuT
public static String toString(int algorithm){ {H>iL
return name[algorithm-1]; B2Orw8F
} {'r*Jb0
?$s2]}v
public static void sort(int[] data, int algorithm) { sPZa|AKHb
impl[algorithm-1].sort(data); E RMh% C
} ;G\rhk
\h0e09& I
public static interface Sort { A6UtpyS*'
public void sort(int[] data); Qu;AU/Q<([
} "= UP&=
KY"~Ta`
public static void swap(int[] data, int i, int j) { foJ|Q\Z,T
int temp = data; #o^E1cI
data = data[j]; ;hZ(20
data[j] = temp; ~;`i&s
} z$YOV"N
} (wA|lK3