[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; Jl}7]cVq#
} {)xrg sB
int i1=l; }=)"uv
int i2=mid+1; }])f^
for(int cur=l;cur<=r;cur++){ OMNdvrE*=O
if(i1==mid+1) Kep?=9r4+
data[cur]=temp[i2++]; AO]e^Q
else if(i2>r) 5$w1[}UUd
data[cur]=temp[i1++]; _E7eJSM.
else if(temp[i1] data[cur]=temp[i1++]; @n3PCH6:Ao
else BC+qeocg
data[cur]=temp[i2++]; ~A( Pa-
} tL|Q{+i yE
} W[DB!ue
W3kilhZ
} =#Jb9=zdR
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改进后的归并排序: z@}~2K
xCD+qP^
package org.rut.util.algorithm.support; kE}Ib4]J
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import org.rut.util.algorithm.SortUtil; 6ZJQ '9f
&bNj/n/
/** #/6X44 *u
* @author treeroot P*Nl3?T
* @since 2006-2-2 %-.GyG$i
* @version 1.0 "tIx$?I
*/ ,'}ZcN2)
public class ImprovedMergeSort implements SortUtil.Sort { _\zfXHp
\/%mabLK
private static final int THRESHOLD = 10; 9:>vl0
yo=d"*E4^
/* yDrJn* r^
* (non-Javadoc) 2 r)c?
* 3]Mx,u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zjS<e XLs[
*/ uq_SF.a'v
public void sort(int[] data) { `Hqu2 '`
int[] temp=new int[data.length]; %|~UNP$
mergeSort(data,temp,0,data.length-1); Y,r2m nq
} SQ[}]Tm;n
] D(3
private void mergeSort(int[] data, int[] temp, int l, int r) { ;DOz92X94
int i, j, k; g}7B0 yo
int mid = (l + r) / 2; '_%Jw:4k
if (l == r) P:o<kRj1
return; E7,\s
if ((mid - l) >= THRESHOLD) lPQH_+)Z"
mergeSort(data, temp, l, mid); X,b}d#\
else go@}r<B$
insertSort(data, l, mid - l + 1); t&0p@xLQ
if ((r - mid) > THRESHOLD) 0J"3RTt
mergeSort(data, temp, mid + 1, r); &W%TY:Da|
else _nt%&f
insertSort(data, mid + 1, r - mid); cW2:D$Pe
,$Mw/fA
for (i = l; i <= mid; i++) { :d;5Q\C`
temp = data; 2t'&7>Ys{
} :>;#/<3{
for (j = 1; j <= r - mid; j++) { J&?kezs
temp[r - j + 1] = data[j + mid]; S;C3R5*:
} POf \l
int a = temp[l]; YZ}gZQ.A0
int b = temp[r]; oT'XcMn
for (i = l, j = r, k = l; k <= r; k++) { Jq->DzSmj/
if (a < b) { w K+2;*bI
data[k] = temp[i++]; =W6P>r_
a = temp; :zCm$@
} else { fHiCuF
data[k] = temp[j--]; mTt 9 o9E
b = temp[j]; T &1sfS,
} E_z@\z MB
} Zo`^pQS
} Cn,dr4J[
t t=$:}A
/** t%%I.zIV7
* @param data (0S"ZT
* @param l lZ|Ao0(
* @param i &xVWN>bd^
*/ Q'N<jX[
private void insertSort(int[] data, int start, int len) { j(SQNSFD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _i&\G}mrC
} mnePm{
} $T6<9cB@
} >&TktQO_T
} T'XRl@
OCd[P1Y]
堆排序： W^x[maz
@1pdyKK
package org.rut.util.algorithm.support; B3D4fYQ
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import org.rut.util.algorithm.SortUtil; ^a]:GPc
nL$tXm-x
/** Au {`oxD
* @author treeroot zAH+{4lC+
* @since 2006-2-2 k $);<= ZI
* @version 1.0 `>V.}K^4
*/ ZE9*i}r
public class HeapSort implements SortUtil.Sort{ /swTn1<Y
P _ SJK
/* (non-Javadoc) myYe~f4=HQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9'tM65K
*/ 1>Op)T>{c
public void sort(int[] data) { =\3*;59\
MaxHeap h=new MaxHeap(); (z[cf|he
h.init(data); i-Z@6\/a5
for(int i=0;i h.remove(); jq[>PvR
System.arraycopy(h.queue,1,data,0,data.length); pyNPdEy
} ?vhW`LXNB
eRf8'-"#-
private static class MaxHeap{ +5Mx0s(5
w9 NUm
void init(int[] data){ Y3thW@mD05
this.queue=new int[data.length+1]; }>j$Wr_h
for(int i=0;i queue[++size]=data; Bg3^BOT
fixUp(size); 33; ytd
} Nb$)YMbA
} `1P &
WN0^hDc-
private int size=0; m?csake.Me
wiutUb Y
private int[] queue; ' ft |
X9P-fF?0
public int get() { PBUc9/
return queue[1]; `aJ[ !O
} !,\]> c
N=wB1gJ
public void remove() { &W ~,q(
SortUtil.swap(queue,1,size--); XW19hG
fixDown(1); <%!@cE+y
} 6PTD%Rf\
file://fixdown 0$UE|yDs>
private void fixDown(int k) { 3 -5^$-7_
int j; )qKfTtN`
while ((j = k << 1) <= size) { n>@(gDq
if (j < size %26amp;%26amp; queue[j] j++; L0|u^J
if (queue[k]>queue[j]) file://不用交换 rR7}SEa
break; m1(rAr1
SortUtil.swap(queue,j,k); |ey6Czm
k = j; 7==Uoy*O
} 4g6d6~098;
} eX=W+&lj
private void fixUp(int k) { AttDD{Ta
while (k > 1) { Q%85,L^U
int j = k >> 1; lwK Au!l
if (queue[j]>queue[k]) [1E u6X6
break; nJ6bC^*)U
SortUtil.swap(queue,j,k); ub-ZrC'
k = j; <AB]FBo(
} {6n B83BB
} 5VISP4a
GI/g@RV
} P'g$F<~V
!#>{..}}3
} _xbVAI4
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SortUtil： lc*<UZR
aK,G6y
package org.rut.util.algorithm; P2lj#aQLS
[1N*mY;
import org.rut.util.algorithm.support.BubbleSort; 2r1.,1
import org.rut.util.algorithm.support.HeapSort; s:Memvf
import org.rut.util.algorithm.support.ImprovedMergeSort; 2?HLEiI1
import org.rut.util.algorithm.support.ImprovedQuickSort; HQ]g{JVld\
import org.rut.util.algorithm.support.InsertSort; 7ZN0_Qs
import org.rut.util.algorithm.support.MergeSort; !"_\5$5i<X
import org.rut.util.algorithm.support.QuickSort; fu33wz1$}B
import org.rut.util.algorithm.support.SelectionSort; "*?^'(yA@
import org.rut.util.algorithm.support.ShellSort; { c]y<q
H1N%uk=kV
/** rR/PnVup
* @author treeroot >R :Bkf-
* @since 2006-2-2 O[$&]>x]]
* @version 1.0 8E|S`I
*/ `|Ih"EZ
public class SortUtil { Lg-Sxz}P!
public final static int INSERT = 1; ]81P<Y(7
public final static int BUBBLE = 2; O{Wy;7i
public final static int SELECTION = 3; kvKbl;<&#
public final static int SHELL = 4; z`'{l{
public final static int QUICK = 5; @'dtlY5;
public final static int IMPROVED_QUICK = 6; I>:M1Yc0
public final static int MERGE = 7; f~t*8rG~m
public final static int IMPROVED_MERGE = 8; WOquG
public final static int HEAP = 9; RHeql*`
$O=m/l$
public static void sort(int[] data) { ^hLAMaR
sort(data, IMPROVED_QUICK); FL-sXg
} ,|}Pof=]xk
private static String[] name={ &_G^=Nc,H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 81`-xVd
}; ;jS~0R
A[^fG_l4
private static Sort[] impl=new Sort[]{ ?9.SwIxU&
new InsertSort(), u0\?aeg`
new BubbleSort(), R{u/r%
new SelectionSort(), }fdo Aid~
new ShellSort(), L-vy,[9)[*
new QuickSort(), )nQA) uz
new ImprovedQuickSort(), j#zUO&Q@
new MergeSort(), P6@(nGgK<
new ImprovedMergeSort(), 3y<;fdS7
new HeapSort() 6f(K'v
}; xV}-[W5sr'
6o!+E@V b
public static String toString(int algorithm){ m&cVda/
return name[algorithm-1]; ^*`hJ48u
} Y2HF
n](Q)h'nlo
public static void sort(int[] data, int algorithm) { xmsw'\
impl[algorithm-1].sort(data); @.@O#
} UTC|8
<S<@V?h
public static interface Sort { DavpjwSn
public void sort(int[] data); :[A>O(
} }y;s(4
%9C_p]P*
public static void swap(int[] data, int i, int j) { 5Ay\s:hb[u
int temp = data; =*_T;;E
data = data[j]; %i6i.TF
data[j] = temp; }\?UmuolQ
} 1U^;fqvja
} TldqF BX