[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; ?o|f':
} 7](KV"%V
int i1=l; Xx>X5Fy
int i2=mid+1; OL^l 3F
for(int cur=l;cur<=r;cur++){ ,]d/Q<
if(i1==mid+1) @W"KVPd
data[cur]=temp[i2++]; z+n,uHs
else if(i2>r) Jh!I:;/
data[cur]=temp[i1++]; )`(p9@,V
else if(temp[i1] data[cur]=temp[i1++]; #$8% w
else ",KCCis
data[cur]=temp[i2++]; $cU!m(SILQ
} i=oU;7~zK
} 5lUF7:A>#
%#xaA'? [
} 2$ze= /l
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改进后的归并排序: 85Otss/mM
y1+*6|
package org.rut.util.algorithm.support; z?*w8kU&>
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import org.rut.util.algorithm.SortUtil; LAS'u"c|
IHv[v*4:
/** 9^#c| 0T
* @author treeroot 7%|~>
* @since 2006-2-2 9\BT0kx
* @version 1.0 9CWezI+
*/ Zy?Hi`
public class ImprovedMergeSort implements SortUtil.Sort { `n@*{J8
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private static final int THRESHOLD = 10; @] DVD
/)}q Xx&
/* eoG$.M"
* (non-Javadoc) ZJzt~ H
* 87 $dBb{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .yqM7U_
*/ &;[Io
public void sort(int[] data) { gv-xm
int[] temp=new int[data.length]; %4,O 2\0?&
mergeSort(data,temp,0,data.length-1); _M`--.{\O[
} F`XP@Xx
$Y/9SV,
private void mergeSort(int[] data, int[] temp, int l, int r) { ( +Q&[E"87
int i, j, k; g4=pnK8
int mid = (l + r) / 2; c|B.n]Z
if (l == r) !h23cj+V
return; IYS)7`{]
if ((mid - l) >= THRESHOLD) {E9+WFz5
mergeSort(data, temp, l, mid); mpU$+
else ,*&:2o_r
insertSort(data, l, mid - l + 1); _u5#v0Y
if ((r - mid) > THRESHOLD) Mb|a+,:>3
mergeSort(data, temp, mid + 1, r); :toh0oB[
else K}buH\yco
insertSort(data, mid + 1, r - mid); T?tgdJ
yW1)vD7
for (i = l; i <= mid; i++) { 7XTkX"zKj
temp = data; 8hOk{xs8
} t(NI-UXBp
for (j = 1; j <= r - mid; j++) { irFMmIb
temp[r - j + 1] = data[j + mid]; *rs5]U<
} c1k/UcEcg~
int a = temp[l]; M3c$=>
int b = temp[r]; e.7EU
for (i = l, j = r, k = l; k <= r; k++) { IEsEdw]aZE
if (a < b) { l1OE!W W
data[k] = temp[i++]; P2BWuhF
a = temp; +./H6!
} else { }@'$b<!B
data[k] = temp[j--]; ]6(N@RC
b = temp[j]; .f%fHj
} K1"*.\?F
} V3Q+s8OIF
} VM GS[qrG
-D
/** eg\v0Y!rI
* @param data cu7hBfj
* @param l PV'x+bN5
* @param i lT(WD}OS
*/ V@e?#iz
private void insertSort(int[] data, int start, int len) { LrM=*Rh,O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DCIxRPw
} oTU!R ,
} jnKWZ/R
} y&q*maa[
} Fq~yL!#!
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堆排序： #%iDT6
eL10Q(;P`
package org.rut.util.algorithm.support; 3G,Oba[$<
Bu<M\w?7Y
import org.rut.util.algorithm.SortUtil; ;4R$g5-4X
wSzv|\ G
/** 591>rh)
* @author treeroot +7D|4
* @since 2006-2-2 0=@?ob7
* @version 1.0 OE_XCZ!5P
*/ S!jTyY7e
public class HeapSort implements SortUtil.Sort{ /32Fy`KV
X@+{5%
/* (non-Javadoc) n7B7m,@1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L-jJg,eY
*/ bhTb[r
public void sort(int[] data) { u)X=Qm)
MaxHeap h=new MaxHeap(); r?+%?$
h.init(data); H*RC@O_hv
for(int i=0;i h.remove(); >Ea8G,
System.arraycopy(h.queue,1,data,0,data.length); ~ -4{B
} :~b3^xhc^
lGPUIoUo
private static class MaxHeap{ 0bceI
.0S~872
void init(int[] data){ Uol|9F
this.queue=new int[data.length+1]; B:b5UD
for(int i=0;i queue[++size]=data; AF;)#T<
fixUp(size); rn/ /%
} <r.)hT"0
} bR*-Ht+wd
lP[w?O
private int size=0; Y}t \4 di
1tEgl\u\
private int[] queue; ^crCy-`#
2#KJ asX
public int get() { mq aHwID
return queue[1]; rHC>z7+z.
} 63q^ $I
]e"=$2d$
public void remove() { 9TgIB
SortUtil.swap(queue,1,size--); 'DY`jVwa
fixDown(1); CY 4gSe?
} R@58*c:U(
file://fixdown wj*,U~syB
private void fixDown(int k) { Jj>?GAir
int j; NO7J!k?
while ((j = k << 1) <= size) { +6sy-<ZL:
if (j < size %26amp;%26amp; queue[j] j++; Ed0QQyC@9
if (queue[k]>queue[j]) file://不用交换 _(_a*ml
break; j@W.&- _
SortUtil.swap(queue,j,k); '-r).Xk
k = j; 6LOnU~l,
} N|8P)
} <":;+Ng+
private void fixUp(int k) { dbwe?ksh
while (k > 1) { :8L8q<U
int j = k >> 1; <6EeD5{*
if (queue[j]>queue[k]) :By?O"LQ
break; L6t+zIUc-~
SortUtil.swap(queue,j,k); Vi>,kF.fV
k = j; TTeH`
} 8;d:-Cp
} W3]_m8,Z
8qk?E6
} .GsV>H
m;H.#^b*
} c&r70L,
8>trS=;n
SortUtil： fL_4uC i\
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package org.rut.util.algorithm; Y'c>:;JEe
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import org.rut.util.algorithm.support.BubbleSort; G<At_YS
import org.rut.util.algorithm.support.HeapSort; p31NIf`
import org.rut.util.algorithm.support.ImprovedMergeSort; 6TQoqH8@U
import org.rut.util.algorithm.support.ImprovedQuickSort; n(b(yXYm]
import org.rut.util.algorithm.support.InsertSort; ?^H `M|S
import org.rut.util.algorithm.support.MergeSort; 931bA&SL=/
import org.rut.util.algorithm.support.QuickSort; "oTHq]Ku
import org.rut.util.algorithm.support.SelectionSort; OglEt["
import org.rut.util.algorithm.support.ShellSort; \.C+ue
ge,H-8'Z
/** SFB~ ->db
* @author treeroot 8J=?5
* @since 2006-2-2 "w^!/
* @version 1.0 {E p0TVj`
*/ k&&2Tq
public class SortUtil { `s"'r !
public final static int INSERT = 1; _4rFEYz$d
public final static int BUBBLE = 2; '[U8}z3
public final static int SELECTION = 3; ;'?l$ ._
public final static int SHELL = 4; )`SES."
public final static int QUICK = 5; !Nu<xq@!
public final static int IMPROVED_QUICK = 6; ?p9VO.^5
public final static int MERGE = 7; fdxLAC
public final static int IMPROVED_MERGE = 8; 1QqYQafA
public final static int HEAP = 9; )hd@S9Z.Y
VCu{&Sh*
public static void sort(int[] data) { u6M.'
sort(data, IMPROVED_QUICK); g$7{-OpB
} Gn\_+Pj$
private static String[] name={ /mXBvY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6FUw"|\u{
}; N96jJk
~Fe${2
private static Sort[] impl=new Sort[]{ )i~cr2Hk
new InsertSort(), n1qQ+(xC
new BubbleSort(), d_AK`wR
new SelectionSort(), yW+yg{Gg:
new ShellSort(), `k=bL"T>\
new QuickSort(), {FO;Yg'
new ImprovedQuickSort(), E'v_#FLvR
new MergeSort(), l]@&D#3ZM
new ImprovedMergeSort(), $k|g"9
new HeapSort() G %N $C
}; stG~AC
8;z6=.4xtg
public static String toString(int algorithm){ IYqBQnX}oM
return name[algorithm-1]; XOxr?NPQ^
} j;%-fvd;
oE<`VY|
public static void sort(int[] data, int algorithm) { A3rPt&<a
impl[algorithm-1].sort(data); IN4=YrM^
} s4G|_==
` BDLW%aL
public static interface Sort { 0n@rLF
public void sort(int[] data); #%`|~%`{:
} 9)0D~oUi
v$~QU{&
public static void swap(int[] data, int i, int j) { j;']cWe
int temp = data; 2]I4M[|&z
data = data[j]; $9]m=S
data[j] = temp; {SwQ[$k=_
} @'YS1N<
} P6E3-?4j