[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; V87ee,
} i %hn
int i1=l; t+!gzZ
int i2=mid+1; <]Pix)
for(int cur=l;cur<=r;cur++){ ?PE1aB+{:
if(i1==mid+1) IEoR7:
data[cur]=temp[i2++]; ;}eEG{`Y
else if(i2>r) A,lw-(.z4Z
data[cur]=temp[i1++]; ss`q{ARb
else if(temp[i1] data[cur]=temp[i1++]; k;fnC+Y$s
else YY:iPaGO
data[cur]=temp[i2++]; wAYzR$i
} ]u4>;sa
} a&s"#j
QE#-A@c
} ( X 'FQ
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改进后的归并排序: 1s}``1>
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package org.rut.util.algorithm.support; ADyNNMcx
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import org.rut.util.algorithm.SortUtil; _WDBG
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/** <[3lV)~t
* @author treeroot UQ$\ an'
* @since 2006-2-2 ;%rs{XO9
* @version 1.0 oX2DFgz
*/ lYZ@a4TA
public class ImprovedMergeSort implements SortUtil.Sort { KSgQ:_u4}
X[~f:E[1J
private static final int THRESHOLD = 10; *]:G7SW{
+A'q#~yILa
/* Jl}!CE@-
* (non-Javadoc) |,a%z-l
* LTYuxZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ilIV}8
*/ F`;TU"pDf
public void sort(int[] data) { g~Nij~/
int[] temp=new int[data.length]; 1FD7~S|
mergeSort(data,temp,0,data.length-1); ^C:{z)"h
} 5gc:Y`7t
MOp=9d+N~
private void mergeSort(int[] data, int[] temp, int l, int r) { @dE 3
int i, j, k; dS3>q<J*a
int mid = (l + r) / 2; o}mhy`}
if (l == r) vbWJhjK0h
return; o]|oAN9
if ((mid - l) >= THRESHOLD) lrmt)BLoh
mergeSort(data, temp, l, mid); f>s#Ngvc
else KMpDlit
insertSort(data, l, mid - l + 1); np`gcj#
if ((r - mid) > THRESHOLD) k5fH;
mergeSort(data, temp, mid + 1, r); f0cYvL]
else AF*ni~
insertSort(data, mid + 1, r - mid); Lt;.Nw
~4=]%XYz
for (i = l; i <= mid; i++) { ,<;l"v(
temp = data; u,Q_WR-wJ
} nj~$%vmA
for (j = 1; j <= r - mid; j++) { pu2wEQ
temp[r - j + 1] = data[j + mid]; ,);= (r9
} u-%r~ }
int a = temp[l]; f\x@ C)E
int b = temp[r]; _o&,
for (i = l, j = r, k = l; k <= r; k++) { P;L)1 g
if (a < b) { XDP6T"h
data[k] = temp[i++]; r|\5'ZMx
a = temp; %67G]?EXB
} else { r{R[[]p
data[k] = temp[j--]; w!B,kqTG
b = temp[j]; )T.pjl
} 6:|!1Pg5
} r6oX6.c
} uGuc._}=
xP{HjONu
/** {*M>X}voS
* @param data `eMrP`
* @param l 1BMV=_
* @param i 0^<Skm27"
*/ ~!3t8Hx6
private void insertSort(int[] data, int start, int len) { [0%yJH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NSMjr_
} @b::6n/u
} OQytgXED
} Edf=?K+\!i
} g33<qYxP
wc6 E-rB
堆排序： q7O,I`KaJ
0%h[0jGj
package org.rut.util.algorithm.support; ; d, JN
KA|&Q<<{@
import org.rut.util.algorithm.SortUtil; 27Kc-rcB
zK' _e&*
/** 3i]"#wK
* @author treeroot $n=W2WJ6f
* @since 2006-2-2 U,%s;
* @version 1.0 Q-! i$#-
*/ RlI W&y
public class HeapSort implements SortUtil.Sort{ e/]O<,*
c{'$=lR "
/* (non-Javadoc) D_l/Gxdpr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LCo1{wi
*/ Ht`<XbQ>
public void sort(int[] data) { 7.7Cluh5,
MaxHeap h=new MaxHeap(); '|YtNhWZ?
h.init(data); K:>NGGY8r
for(int i=0;i h.remove(); L<f-Ed9|
System.arraycopy(h.queue,1,data,0,data.length); tl{]gz
} ql!5m\
p/ziFpU
private static class MaxHeap{ Ek"YM[
8_^'(]
void init(int[] data){ uD.
this.queue=new int[data.length+1]; >Jm-2W5J
for(int i=0;i queue[++size]=data; iN:G/ss4O
fixUp(size); s0C?Bb}?
} '`M#UuU
} -{yDk$"
DHh+%|e
private int size=0; SBCL1aM
v?Z'[l
private int[] queue; i>ESEmb-
>VRo|o<D
public int get() { g)=V#Bglv
return queue[1]; ?Ia4H
} Ux_EpC
gZw\*9Q9
public void remove() { 4 "pS
SortUtil.swap(queue,1,size--); Du)B9s
fixDown(1); T$gkq>!j<E
} KW&nDut
file://fixdown M,b<B_$
private void fixDown(int k) { 9>A-$a4R>
int j; ~fyF&+ibp'
while ((j = k << 1) <= size) { #@nZ4=/z
if (j < size %26amp;%26amp; queue[j] j++; L/qZ ;{
if (queue[k]>queue[j]) file://不用交换 tpv?`(DDU
break; oS[W*\7'!
SortUtil.swap(queue,j,k); [TRGIGtq
k = j; Bv;I0i:_
} |x1$b7
} QDIsC
private void fixUp(int k) { xT{TVHdU
while (k > 1) { '4af ],
int j = k >> 1; }U2[?
if (queue[j]>queue[k]) .LX?VD
break; PRMZfYc
SortUtil.swap(queue,j,k); 21.YO]Et
k = j; ::4"wU3t
} K&j'c
} z`\#$
bcq@N
} -(6eVI
.[edln
} PfVEv *
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SortUtil： b0r,h)R
Ro$j1Aw(
package org.rut.util.algorithm; |C~Sr#6)7
EwTS!gL
import org.rut.util.algorithm.support.BubbleSort; G i$
import org.rut.util.algorithm.support.HeapSort; IetCMp
import org.rut.util.algorithm.support.ImprovedMergeSort; ceqFQ
import org.rut.util.algorithm.support.ImprovedQuickSort; E2>im>p
import org.rut.util.algorithm.support.InsertSort; XZF%0g2$b
import org.rut.util.algorithm.support.MergeSort; ILNE 4n
import org.rut.util.algorithm.support.QuickSort; }j&O/Up
import org.rut.util.algorithm.support.SelectionSort; '*8
import org.rut.util.algorithm.support.ShellSort; YavfjS:2
ri_P;#lz
/** |c<XSX?ir
* @author treeroot kBrvl^D{5
* @since 2006-2-2 4#TnXxL
* @version 1.0 #o"tMh!f
*/ J09*v)L
public class SortUtil { t$aVe"uM
public final static int INSERT = 1; D[V`^CTu
public final static int BUBBLE = 2; %(fL?
public final static int SELECTION = 3; |d5ggf.w
public final static int SHELL = 4; Q%rVo4M#2
public final static int QUICK = 5; #1MKEfv(~
public final static int IMPROVED_QUICK = 6; 55LgBD
public final static int MERGE = 7; @=CLeQG`
public final static int IMPROVED_MERGE = 8; $Xf~# uH
public final static int HEAP = 9; X>2? `8M
4\v~HFsv
public static void sort(int[] data) { Z&TD+fT<
sort(data, IMPROVED_QUICK); i"/r)>"b
} )sqaR^
private static String[] name={ 8^i[j\Y;6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5@K\c6
}; bC6X?m=
c qv.dC
private static Sort[] impl=new Sort[]{ L%f-L.9`u
new InsertSort(), ,KT<4
new BubbleSort(), 6tX.(/+L
new SelectionSort(), RTA%hCr!
new ShellSort(), C:Vv!u
new QuickSort(), yj>){NcX
new ImprovedQuickSort(), P1$f}K}
new MergeSort(), M\I_{Q?_
new ImprovedMergeSort(), fH&zR#T7U4
new HeapSort() e!6eZ)l
}; ubD#I{~J
%@>YNPD`E
public static String toString(int algorithm){ #sL/y
return name[algorithm-1]; 0xv\D0
} Tu==49
@sN^BX`z
public static void sort(int[] data, int algorithm) { E{<?l 7t
impl[algorithm-1].sort(data); "=FIFf
} anLbl#UV
Q<dba12
public static interface Sort { "X`Qe!zk4
public void sort(int[] data); vnDmFqelz
} nz>K{(
[@g~
public static void swap(int[] data, int i, int j) { " l.!Ed
int temp = data; f7.m=lbe
data = data[j]; P7'M],!9w
data[j] = temp; '\@WN]
} hUBF/4s\
} _'&k#Q