[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; *.-qbwOg
} ;'4Kg@/
int i1=l; `6*1mE1K&
int i2=mid+1; sFRQFX0XoY
for(int cur=l;cur<=r;cur++){ kl5Y{![/&f
if(i1==mid+1) H<3ayp$
data[cur]=temp[i2++]; 7}Jn`^!
else if(i2>r) ENZYrWl
data[cur]=temp[i1++]; #\O?|bN'q
else if(temp[i1] data[cur]=temp[i1++]; t)l^$j!h@
else @p9YHLxLjQ
data[cur]=temp[i2++]; 3TT?GgQ
} SiT5QJe
} =#?=Lh
ue!wo-|#G
} tfd!;`B
dYp} R>+
改进后的归并排序: Z+S1e~~
}vX/55
package org.rut.util.algorithm.support; "l-b(8n
{mB &xz:b
import org.rut.util.algorithm.SortUtil; 9Ui|8e~=
G-RE
/** 2NWQiSz
* @author treeroot 8G_KbS
* @since 2006-2-2 A}0u-W
* @version 1.0 PA${<wyBR_
*/ 2!6-+]tC
public class ImprovedMergeSort implements SortUtil.Sort { C,dRdEB>
e\H1IR3
private static final int THRESHOLD = 10; :stA]JB# w
[hKt4]R
/* NGuRyZp69&
* (non-Javadoc) SQI =D8
* :@sjOY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A!aki}aT~
*/ )ZDqj
public void sort(int[] data) { sFonc
int[] temp=new int[data.length]; 7!#34ue
mergeSort(data,temp,0,data.length-1); xw~&OF&
} Q`(h
E9PD1ADR
private void mergeSort(int[] data, int[] temp, int l, int r) { pq<2:F:Kl
int i, j, k; ]s^Pw>/`
int mid = (l + r) / 2; 2)+ddel<Z
if (l == r) j<_)Y(x>
return; TWo.c _l
if ((mid - l) >= THRESHOLD) Xe:e./@
mergeSort(data, temp, l, mid); 35fsr=
else gjex;h
insertSort(data, l, mid - l + 1); jV|/ C
if ((r - mid) > THRESHOLD) Tyt1a>!qA
mergeSort(data, temp, mid + 1, r); ?<eH!MHF
else aj@<4A=;
insertSort(data, mid + 1, r - mid); J={IGA
)w&k&TY4H
for (i = l; i <= mid; i++) { 8YwSaBwO
temp = data; }C9P--
} Xmaj7*f>p
for (j = 1; j <= r - mid; j++) { *S{fyYyM
temp[r - j + 1] = data[j + mid]; -4nSiI
} `{W>Dy
int a = temp[l]; 8d*W7>rq
int b = temp[r]; ,lr\XhO
for (i = l, j = r, k = l; k <= r; k++) { +C){&/=#
if (a < b) { ?D`h[ai
data[k] = temp[i++]; !O*uQB
a = temp; /yO|Q{C}M8
} else { I\:(`)"r
data[k] = temp[j--]; >.f'_2#Z&
b = temp[j]; ZT%Q:]B+
} oBZzMTPe
} 6=i@ttAK
} /DN!"
kMY1Xb
/** $mq@g
* @param data bO\E)%zp
* @param l M~t;&po
* @param i BP`'1Ns
*/ ;Alw`'
private void insertSort(int[] data, int start, int len) { _vgFcE~E@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B$@fE}
} H_<hZUB
} r&?i>.Kz8
} w,v~
} ZVX!=3VT
-cW'g
堆排序： &S|%>C{P.w
9 9S-P}xd
package org.rut.util.algorithm.support; @#= ail
/WWD;keP5
import org.rut.util.algorithm.SortUtil; {X'D07q
:*MqYny&
/** ;&v~tD7
* @author treeroot xU_Dg56z'&
* @since 2006-2-2 R#0Z
* @version 1.0 qS{E+)P
*/ }HC6m{vH(
public class HeapSort implements SortUtil.Sort{ }E%#g#
X[Q:c4'
/* (non-Javadoc) [TFd|ywn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O)E8'Oe"Q
*/ )lsR8Hi8
public void sort(int[] data) { vOl<
MaxHeap h=new MaxHeap(); xOAA1#
h.init(data); V`/D!8>
for(int i=0;i h.remove(); sS5:5i
System.arraycopy(h.queue,1,data,0,data.length); QFS5PZ
} ;@R=CQ6
wmQT$`$b
private static class MaxHeap{ 8r46Wr7Q
vL,:Yn@b
void init(int[] data){ /\0rRT
this.queue=new int[data.length+1]; BD(Y=g
for(int i=0;i queue[++size]=data; ,4&?`Q
fixUp(size); ~dFdO7
} d}2$J1`
} MY]<^/Q
:4V8Iz 71
private int size=0; wcI?.
zcn/LF
private int[] queue; C=&rPUX{
&eqeQD6
public int get() { #S*`7MvM
return queue[1]; +"i|)yUYy}
} 4|#@41\ B
4N- T=Ig
public void remove() { Mt93YD-2+
SortUtil.swap(queue,1,size--); ZVin+z
fixDown(1); @g{FNXY$m
} 8NJxtT~0c~
file://fixdown ^z%ShmM&LZ
private void fixDown(int k) { &O:IRR7p
int j; qz@k-Jqq d
while ((j = k << 1) <= size) { (1pR=
if (j < size %26amp;%26amp; queue[j] j++; 0S%xm'|N
if (queue[k]>queue[j]) file://不用交换 hN5?u:
break; '[z529HN
SortUtil.swap(queue,j,k); fy6<KEea
k = j; lzE{e6
} 1[g -f,
} T.}wcQf&*
private void fixUp(int k) { y$Rr,]L
while (k > 1) { 8?za&v
int j = k >> 1; Jx jP'8
if (queue[j]>queue[k]) sT*D]J 2
break; `Nnaw+<]
SortUtil.swap(queue,j,k); .yF@Ow
k = j; \|gE=5!Am=
} /Z?$!u4I
} c&mLK1A6
.S{FEV
} ILU7Yhk
!<8-juY
} D"z3SLFW{
9*&c2jh
SortUtil： XYh)59oM%
dKk#j@[n"
package org.rut.util.algorithm; 4m:D8&D_M
~Oc:b>~
import org.rut.util.algorithm.support.BubbleSort; =<;C5kSD
import org.rut.util.algorithm.support.HeapSort; a7fFp9l!
import org.rut.util.algorithm.support.ImprovedMergeSort; sP'U9l
import org.rut.util.algorithm.support.ImprovedQuickSort; Xt.ca,`U
import org.rut.util.algorithm.support.InsertSort; x_+-TC4IXn
import org.rut.util.algorithm.support.MergeSort; CQANex4&\
import org.rut.util.algorithm.support.QuickSort; {O=PVW2S
import org.rut.util.algorithm.support.SelectionSort; 1`Ig A0V`"
import org.rut.util.algorithm.support.ShellSort; ^cnTZzT#Q
hE;|VSdo
/** m4r<=o
* @author treeroot \GD\N=?~
* @since 2006-2-2 ;H4s[#K
* @version 1.0 nf0]<x2
*/ RD|DHio%
public class SortUtil { o}p^q:T*
public final static int INSERT = 1; ;Zy[2M
public final static int BUBBLE = 2; c<a)Yqf"]
public final static int SELECTION = 3; QG=K^g
public final static int SHELL = 4; A`:a T{j
public final static int QUICK = 5; 0sA+5*mdM
public final static int IMPROVED_QUICK = 6; a_3w/9L4r
public final static int MERGE = 7; W>j@E|m$
public final static int IMPROVED_MERGE = 8; M-8`zA2
public final static int HEAP = 9; ~Jh1$O,9o
/U 3Uuk:
public static void sort(int[] data) { *N&~Uq^
sort(data, IMPROVED_QUICK); 2oo/KndU
} )kT.3 Q
private static String[] name={ ='t}d>l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lv>^P>S(O
}; we/sv9v}n
QnA~,z/.w
private static Sort[] impl=new Sort[]{ ~Z~V:~
new InsertSort(), *>h|<|T'
new BubbleSort(), +'$5Jtz
new SelectionSort(), k2O3{xIjc
new ShellSort(), =<%[P9y
new QuickSort(), SJ2l6
new ImprovedQuickSort(), U,K=(I7OBX
new MergeSort(), TI|h
new ImprovedMergeSort(), Fs3 :NH
new HeapSort() Sh2BU3
}; yv|`A2@9
PX*}.L *x
public static String toString(int algorithm){ ^ -4~pDv^
return name[algorithm-1]; tZG l^mA"g
} y_'6bpb
DNr*|A2<
public static void sort(int[] data, int algorithm) { ?>Ngsp>-P
impl[algorithm-1].sort(data); jU-aa+
} q BIekQT
Z(t7QFd
public static interface Sort { nV`U{}x
public void sort(int[] data); #W&o]FAA3y
} as(/ >p
WvZt~x&2
public static void swap(int[] data, int i, int j) { .DI?-=p|_#
int temp = data; = N;5T
data = data[j]; I~;w Q
data[j] = temp; d_Jj&:"l
} dVUe!S`
} 'b0r?A~c=