[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; %Lfy!]Ru
} 34aSRFsk*
int i1=l; j=PM]
int i2=mid+1; <*HsJwr)u
for(int cur=l;cur<=r;cur++){ g_(O7
if(i1==mid+1) w+{ o^O
data[cur]=temp[i2++]; ,+'VQa"]
else if(i2>r) "bvob G
data[cur]=temp[i1++]; kOv37c'
else if(temp[i1] data[cur]=temp[i1++]; \|R\pS}4
else k6|/ik9C
data[cur]=temp[i2++]; 7,R ~2ss5z
} cg}lF9;d
} zw%1a 3!
>u?a#5R:m
} b}m@2DR'|m
L&Pj0K-HT3
改进后的归并排序: )bB Va^
V`"Cd?R0Z
package org.rut.util.algorithm.support; d+IN-lR(
$gaGaB
import org.rut.util.algorithm.SortUtil; F Xp_`9.zH
f.ws\^v%
/** HurF4IsHk
* @author treeroot nMH:7[x3
* @since 2006-2-2 ;^so;>F
* @version 1.0 8MBvp*
*/ iY3TB|tMt
public class ImprovedMergeSort implements SortUtil.Sort { S1_):JvV
a}kPc}n\
private static final int THRESHOLD = 10; B3&ETi5NTU
S+-V16{i
/* X->` ~-aj
* (non-Javadoc) dwUs[v
* A=BT2j'l)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q6%Pp_$k
*/ 8:"s3xaO3
public void sort(int[] data) { {:`XhPS<B
int[] temp=new int[data.length]; k$w#:Sx
mergeSort(data,temp,0,data.length-1); 0Q:l,\lY
} Gs(;&fw
;1Q@d
private void mergeSort(int[] data, int[] temp, int l, int r) { X"Q\MLy
int i, j, k; FLaj|Z~#)
int mid = (l + r) / 2; wRe2sjM
if (l == r) Ca#T?HL
return; &*o{-kw
if ((mid - l) >= THRESHOLD) 8>!-|VSn
mergeSort(data, temp, l, mid); Kq}-)
else kFQx7m
insertSort(data, l, mid - l + 1); E[>A# l53
if ((r - mid) > THRESHOLD) x{,W<oXg
mergeSort(data, temp, mid + 1, r); FtybF
else -}"nb-RR\
insertSort(data, mid + 1, r - mid); HXQ }B$V
T)Pr%kF
for (i = l; i <= mid; i++) { nF=[m; ~
temp = data; 9]^NAlno
} a- 7RJ.
for (j = 1; j <= r - mid; j++) { $x(p:+TI\4
temp[r - j + 1] = data[j + mid]; v)LSH;<
} <ua! ]~
int a = temp[l]; .}iRe}=
int b = temp[r]; <l$ vnq
for (i = l, j = r, k = l; k <= r; k++) { :hDv^D?3
if (a < b) { )Xice=x9
data[k] = temp[i++]; :Oi}X7\
a = temp; a*!9RQ
} else { 9Q&]5|x
data[k] = temp[j--]; 6'jgjWEe3&
b = temp[j]; 4+F@BxpB
} t9&=; s
} \}; 4rm}V
} |pR'#M4j4A
(%*~5%l\
/** Ny]]L
* @param data 3PaMq6Ca
* @param l /7K7o8g
* @param i *xDV8iu_
*/ E^x/v_,$w!
private void insertSort(int[] data, int start, int len) { d"}lh:L9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8D`TN8[W
} <P-AlHYV-
} a#+;BH1
} #[y2nK3zF
} |5\: E}1
*):s**BJ$
堆排序： DN|+d{^lN
1A N)%
package org.rut.util.algorithm.support; @g1T??h
kf_*=ER
import org.rut.util.algorithm.SortUtil; 'F7UnkKO|
E{[>j'dwc
/** `i6q\-12n
* @author treeroot 7E R!>l+
* @since 2006-2-2 j.KV:zJU
* @version 1.0 ^[1Xl7)`
*/ \d QRQL{LL
public class HeapSort implements SortUtil.Sort{ qmq#(%Z <W
BXUd i&'O
/* (non-Javadoc) "tmr s_~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?)e6:T(
*/ 'o1lJ?~kH
public void sort(int[] data) { z"V`8D
MaxHeap h=new MaxHeap(); d@ tD0s
h.init(data); 68nPz".X
for(int i=0;i h.remove(); UX)QdT45Mh
System.arraycopy(h.queue,1,data,0,data.length); 2o~UA\:+=
} "2`/mtMon
L+0O=zJF
private static class MaxHeap{ z#+Sf.
9oVprd>%@
void init(int[] data){ pB,l t6
this.queue=new int[data.length+1]; +(oExp(!
for(int i=0;i queue[++size]=data; &}VVr
fixUp(size); ,UneS
} q5>!.v
} [`bA,)y"
AnQUdU
private int size=0; -9$.&D|
\|$GBU
private int[] queue; c1g'l.XL 3
(_eM:H=e>
public int get() { ^1X 6DH`
return queue[1]; gA&`vnNP
} D^A#C<Gs
T,v5cc:nO
public void remove() { TGI`}#
SortUtil.swap(queue,1,size--); j15t8du&O
fixDown(1); ;et(Yi;9
} /mnV$+BE
file://fixdown M3H^s_
private void fixDown(int k) { v|2+7N:[;
int j; gOkum_
while ((j = k << 1) <= size) { 6jz~q~I
if (j < size %26amp;%26amp; queue[j] j++; &a";jO GB
if (queue[k]>queue[j]) file://不用交换 `5Em: 8 M
break; ]!cLFXa
SortUtil.swap(queue,j,k); d>x(Bj6
k = j; T@Th?
} BU=Ta$#BZ
} u$+nl~p[&
private void fixUp(int k) { Q$~_'I7~Mz
while (k > 1) { ?wMS[Kj
int j = k >> 1; )7a 4yTg!~
if (queue[j]>queue[k]) mlbSs_LT^
break; "Fqrk>Q~
SortUtil.swap(queue,j,k); G_6!w//
k = j; #=I5_u
} u7bji>j
} nLnzl
kl#)0yqN0
} oNRp
&p.7SPQ8/
} )Z63 cr/
T0K*!j}O
SortUtil： p.!p6ve){
ivPX_#QI
package org.rut.util.algorithm; _6C,w`[[6
4m6%HV8{}[
import org.rut.util.algorithm.support.BubbleSort; ' y_2"
import org.rut.util.algorithm.support.HeapSort; =v~$&@
import org.rut.util.algorithm.support.ImprovedMergeSort; @<44wMp
import org.rut.util.algorithm.support.ImprovedQuickSort; Z^GXKOeq
import org.rut.util.algorithm.support.InsertSort; h($Jo
import org.rut.util.algorithm.support.MergeSort; DO ,7vMO
import org.rut.util.algorithm.support.QuickSort; tDNo; f
import org.rut.util.algorithm.support.SelectionSort; (0zYS_mA
import org.rut.util.algorithm.support.ShellSort; l#|M.V6G
&F|Wk,y
/** qQCds}<w
* @author treeroot tMr$N[@r
* @since 2006-2-2 2G}@s.iE
* @version 1.0 ?,FL"ye
*/ }Z% j=c"d
public class SortUtil { wW0m}L
public final static int INSERT = 1; >TS=tK
public final static int BUBBLE = 2; |=EwZmj-c
public final static int SELECTION = 3; !9EbG
public final static int SHELL = 4; PpR eqmo
public final static int QUICK = 5; );fPir?+
public final static int IMPROVED_QUICK = 6; Hu$JCB-%
public final static int MERGE = 7; wy?Hp*E
public final static int IMPROVED_MERGE = 8; @gihIysf
public final static int HEAP = 9; qim|=
5S&^mj-9
public static void sort(int[] data) { uN(N2m
sort(data, IMPROVED_QUICK); k:CSH{s5{
} *|)O
private static String[] name={ 'd9cCQ}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dx"9jFn
}; p&3~n: Fo
"Kf4v|6;
private static Sort[] impl=new Sort[]{ Q&?B^[N*Q
new InsertSort(), GlaZZ,
new BubbleSort(), #oEq)Vq>g|
new SelectionSort(), (eO_]<wmky
new ShellSort(), q4ej7T8
new QuickSort(), @{x+ln1r
new ImprovedQuickSort(), e[t1V/ah
new MergeSort(), EtA,ow
new ImprovedMergeSort(), u|\K kk
new HeapSort() @1)C3(=A
}; ^%Fn|U\u
7dXh,sD
public static String toString(int algorithm){ luV_
return name[algorithm-1]; FSS~E [(DL
} J*]JH{
E1Rz<&L
public static void sort(int[] data, int algorithm) { 73(5.'F
impl[algorithm-1].sort(data); %)j^>W5
} dhI+_z
zK&J2P`
public static interface Sort { q@iZo,Yk
public void sort(int[] data); =lS@nRH
} t:qPW<wc
[300F=R
public static void swap(int[] data, int i, int j) { 9XW[NY#)#
int temp = data; fFd"21>
data = data[j]; a|@1RH>7H
data[j] = temp; LrnE6U9
} D}EH9d
} \t]aBT,