[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; zzx4;C",u
} Gs9jX/#
int i1=l; /2U.,vw
int i2=mid+1; !eO?75/
for(int cur=l;cur<=r;cur++){ m$cM+
if(i1==mid+1) }@#eD
data[cur]=temp[i2++]; dy0!Zz
else if(i2>r) 0b|!S/*A3
data[cur]=temp[i1++]; O4#zsr:"
else if(temp[i1] data[cur]=temp[i1++]; jQdfFR
else gGX/p6"
data[cur]=temp[i2++]; bEE:6)]G
} q)vD "{0.
} IaJ(T>"+
un/R7"
} ~cez+VQe
.Q#Eb %%
改进后的归并排序: M6I1`Lpf
ae<KUThm.
package org.rut.util.algorithm.support; 1`uIjXr(
C8jZcs#4
import org.rut.util.algorithm.SortUtil; uI%[1`2N-
l&yR-FJ7KY
/** <)&ykcB
* @author treeroot ruW6cvsvet
* @since 2006-2-2 (+U!#T]'D
* @version 1.0 ML]?`qv '
*/ %NBD^gF
public class ImprovedMergeSort implements SortUtil.Sort { ;L)}blN.
8[Qw8z5-
private static final int THRESHOLD = 10; xv ja
L%<1C\k
/* i a|F
* (non-Javadoc) J'7Oxjlg
* m$ JQ[vgh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &O[o;(}mFI
*/ W)"q9(T?%
public void sort(int[] data) { C&SYmYj^c
int[] temp=new int[data.length]; _]4cY%s
mergeSort(data,temp,0,data.length-1); WV6vM()#!C
} ewLr+8
[ wROIvV
private void mergeSort(int[] data, int[] temp, int l, int r) { $M8'm1R9
int i, j, k; B}jZ~/D}
int mid = (l + r) / 2; J2R<'(
if (l == r) Ug"B/UUFd
return; [DE8s[i-
if ((mid - l) >= THRESHOLD) +:t1PV;l
mergeSort(data, temp, l, mid); hb_Ia]b
else RWoiV10
insertSort(data, l, mid - l + 1); }FK6o 6
if ((r - mid) > THRESHOLD) vZKo&jUk
mergeSort(data, temp, mid + 1, r); Jk~T.p?tF
else "pH+YqJ$
insertSort(data, mid + 1, r - mid); eMF%!qUr
a2i
for (i = l; i <= mid; i++) { %_u3Np
temp = data; IFE C_F>
} s810714
for (j = 1; j <= r - mid; j++) { *= D$
temp[r - j + 1] = data[j + mid]; E8nqExQ
} kz&)a>aA
int a = temp[l]; Wt8 RC
int b = temp[r]; khIh<-s!
for (i = l, j = r, k = l; k <= r; k++) { -8o8lz
if (a < b) { JE j+>
data[k] = temp[i++]; J+;.t&5R
a = temp; +]__zm/^
} else { %d>Ktf
data[k] = temp[j--]; "au"\}
b = temp[j]; z XvWo6
} z[';HJ0O;
} @#V{@@3$
} X=JSqO6V9
OVd"'|&6_
/** *=I#VN*_<.
* @param data ~/NA?E-c
* @param l zso.?`85
* @param i ^qDkSoqC"
*/ p;p G@Vg
private void insertSort(int[] data, int start, int len) { D( _aXy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xJ3#k;
} [$./'-I]
} Ve=0_GR0
} 4@bL` L)
} p5bH-km6
)sL:iGU
堆排序： 1jV^\x0
_Y0o\0B
package org.rut.util.algorithm.support; >Z3}WMgBN
fLys$*^)^
import org.rut.util.algorithm.SortUtil; $0wl=S
KomF)KQ2r
/** (YR] X_
* @author treeroot o`#;[
* @since 2006-2-2 %xg"e O2x
* @version 1.0 [Ea5Bn;~!
*/ 8IX6MfR}C
public class HeapSort implements SortUtil.Sort{ Y,0O&'>
B@F1!8l
/* (non-Javadoc) D8h~?phK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r^@*Cir
*/ 3*;{C|]S
public void sort(int[] data) { weu'<C
MaxHeap h=new MaxHeap(); bT>^% H3
h.init(data); CSD8?k]2
for(int i=0;i h.remove(); "ex? #qD&
System.arraycopy(h.queue,1,data,0,data.length); GoFC!nx
} pa+y(!G
xLGAP-mx]
private static class MaxHeap{ P#yS]F/
G U!XD!!&
void init(int[] data){ +J^}"dG
this.queue=new int[data.length+1]; #fFEo)YG
for(int i=0;i queue[++size]=data; 6IvLr+I
fixUp(size); ^+P]_< 43
} ]vlQNd?
} `R; ct4-
{g);HnmPN
private int size=0; Ohjqdv@
j$Kubg(I5
private int[] queue; ~gV|_G
2{ptV\f]D
public int get() { ad"&c*m[
return queue[1]; *+J&ebSTN
} ypml22)kz
v&?Bqj
public void remove() { plp).Gq
SortUtil.swap(queue,1,size--); }q~A( u
fixDown(1); Z|j8:Ohz
} \V&ly/\ )
file://fixdown 7{b|+0W
private void fixDown(int k) { :Z/ig%
int j; pY:xxnE
while ((j = k << 1) <= size) { bG5c~
if (j < size %26amp;%26amp; queue[j] j++; mp5]=6~:m
if (queue[k]>queue[j]) file://不用交换 O4}cv
break; Dm5UQe
SortUtil.swap(queue,j,k); ly{~X
k = j; xR%CS`0R
} +\{!jB*g
} 1ltoLd\{
private void fixUp(int k) { =XYfzR
while (k > 1) { eDy}_By^
int j = k >> 1; =|jOio=s:
if (queue[j]>queue[k]) E(S}c*05O
break; aEgzQono
SortUtil.swap(queue,j,k); H!xBFiOH$n
k = j; -Y+[`0$'
} Oo#wPT;1^(
} #7g~Um%p
&'(:xjN
} S4tdWA
zKI(yC
} F 6SIhf.;
'T.> oP0>
SortUtil： 1~_]"Y'
PPmZ[N9(;
package org.rut.util.algorithm; K7y}R%QF
a#mdD:,cF
import org.rut.util.algorithm.support.BubbleSort; $+rdzsf)+/
import org.rut.util.algorithm.support.HeapSort; .Wb),
import org.rut.util.algorithm.support.ImprovedMergeSort; Xe* L^8+
import org.rut.util.algorithm.support.ImprovedQuickSort; 2 OGg`1XX
import org.rut.util.algorithm.support.InsertSort; '9b<r7\@
import org.rut.util.algorithm.support.MergeSort; 3nG(z>
import org.rut.util.algorithm.support.QuickSort; b9:E0/6
import org.rut.util.algorithm.support.SelectionSort; tnTr&o#
import org.rut.util.algorithm.support.ShellSort; Pl 5+Oo
%u!#f<"[
/** OtnYv
* @author treeroot ]P 2M
* @since 2006-2-2 !IT']kA
* @version 1.0 8T1`TGSFC
*/ L1aN"KGMF
public class SortUtil { t<$yxD/R
public final static int INSERT = 1; 2Ejs{KUj
public final static int BUBBLE = 2; B\4SB
public final static int SELECTION = 3; @jjp\~
public final static int SHELL = 4; wCkkfTO
public final static int QUICK = 5; &yYK%~}t[
public final static int IMPROVED_QUICK = 6; id*UTY Tg
public final static int MERGE = 7; S__ o#nf`%
public final static int IMPROVED_MERGE = 8; 4}l,|7_&I
public final static int HEAP = 9; 2O4UytN
esxU44
public static void sort(int[] data) { e+2!)w)[
sort(data, IMPROVED_QUICK); J]Y." hi
} 6KV&E8Gn
private static String[] name={ AR)&W/S)7,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;B tRDKn
}; kR'!;}s
vL-%"*>v
private static Sort[] impl=new Sort[]{ D3MuP p-v
new InsertSort(), :JPI#zZun
new BubbleSort(), rs!J<CRq
new SelectionSort(), - 5A"TNU
new ShellSort(), |~'{ [?a*
new QuickSort(), `oq 3G }
new ImprovedQuickSort(), /(vT49(]
new MergeSort(), x!Wl&
new ImprovedMergeSort(), 5vY1 XZt{
new HeapSort() Y5(`/
}; \alRBHqE
"IB)=Hc
public static String toString(int algorithm){ jp2l}C
return name[algorithm-1]; }/M ~
} C[wnor!
iT IW;Cv
public static void sort(int[] data, int algorithm) { V_0e/7}Ya
impl[algorithm-1].sort(data); Tqm9><!r
} Ma_! 1Y
^@jOS{f l
public static interface Sort { Oq|pd7fcgm
public void sort(int[] data); cITQ,ah
} )D(XDN
AEEy49e
public static void swap(int[] data, int i, int j) { |f`!{=?
int temp = data; I_N"mnn@Nr
data = data[j]; lOYwYMi
data[j] = temp; dpTap<Noby
} vsLn@k3
} /I: d<A