[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; DbB<8$
} C9MK3vtD.
int i1=l; Qjnh;uBO
int i2=mid+1; d}Guj/cx,
for(int cur=l;cur<=r;cur++){ -AD`(b7q
if(i1==mid+1) '%ZKvZ-
data[cur]=temp[i2++]; _Li.}g@Bd
else if(i2>r) He4HIZ
data[cur]=temp[i1++]; 0-{E% k
else if(temp[i1] data[cur]=temp[i1++]; islHtX VE
else \o2l;1~
data[cur]=temp[i2++]; I+.U.e^gx
} LEtGrA/%@b
} ~,KrL(jC
%3TioM[B
} &Z!y>k%6
cr]b #z
改进后的归并排序: ml^=y~J[
$M0l (htR
package org.rut.util.algorithm.support; y4|<+9<7
8(y%]#n
import org.rut.util.algorithm.SortUtil; x0{B7/FN
S#oBO%!
/** }1[s,
* @author treeroot /U!B2%vq_
* @since 2006-2-2 +aM[!pW(e
* @version 1.0 st)v'ce,
*/ a'Odw2Q_
public class ImprovedMergeSort implements SortUtil.Sort { :OjmaP
NvTK7? v
private static final int THRESHOLD = 10; 8rlf9m
lc~c=17
/* E^5
* (non-Javadoc) mS;WNlm\
* -}j(_]t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ntPj9#lf
*/ 5bXpj86mY
public void sort(int[] data) { V6_":L"!
int[] temp=new int[data.length]; #6YpV)
mergeSort(data,temp,0,data.length-1); Hf1b&8&:K
} na9YlJ\
09P2<oFLn
private void mergeSort(int[] data, int[] temp, int l, int r) { u9,dSR
int i, j, k; 1'("; 0I
int mid = (l + r) / 2; .{?;#Cdn
if (l == r) yX{7<\x
return; LD NdHG6
if ((mid - l) >= THRESHOLD) *HHL a
mergeSort(data, temp, l, mid); {` bX*]
else 'WmjQsf
insertSort(data, l, mid - l + 1); [Y.JC'F#
if ((r - mid) > THRESHOLD) T]1.":
mergeSort(data, temp, mid + 1, r); hS &H*
else `^on`"\{u
insertSort(data, mid + 1, r - mid); :6)!#q'g
5Rw2/J L
for (i = l; i <= mid; i++) { e:4,rfF1
temp = data; xW9R-J\W
} i?@7>Ca
for (j = 1; j <= r - mid; j++) { =N\$$3m?
temp[r - j + 1] = data[j + mid]; HN/YuP03[
} NYg&8s.
int a = temp[l]; m8F \ESL
int b = temp[r]; e];IQ|
for (i = l, j = r, k = l; k <= r; k++) { Q"eqql<h#
if (a < b) { >c Tt2v
data[k] = temp[i++]; 3$K[(>s
a = temp; dxZn| Y
} else { tP2.D:( R
data[k] = temp[j--]; '-I\G6w9
b = temp[j]; f>cUdEPBb
} i,Z-UA|f=T
} .=G3wox3
} s[UV(::E
<?L5bhq
/** IN#/~[W
* @param data QqW N7y_9
* @param l U1/ww-!Z
* @param i Gx4uf
*/ B%tj-h(a
private void insertSort(int[] data, int start, int len) { R8!~>$#C6)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U61 LMH
} Zm++5b`W/[
} [h' 22W
} b">"NvlB
} AA ~7"2e
47*2QL^zj
堆排序： E#tfCM6
5S&Qj7kr
package org.rut.util.algorithm.support; ouoIbA9X
%t1Z!xv_
import org.rut.util.algorithm.SortUtil; >,k2|m
u6Ux nqNc
/** #wvGS%
* @author treeroot 7J$rA.tu
* @since 2006-2-2 (M{wkQTO
* @version 1.0 |d6/gSiF
*/ ;O,&MR{;|n
public class HeapSort implements SortUtil.Sort{ =)i^E9
Y Kp@n8A
/* (non-Javadoc) L.K|]]u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a5pM~.]
*/ Pjvb}q=
public void sort(int[] data) { ~+BU@PHv
MaxHeap h=new MaxHeap(); 'h~IbP
h.init(data); l9+CJAmq
for(int i=0;i h.remove(); >}]bKq
System.arraycopy(h.queue,1,data,0,data.length); {IBbN05 ;
} gwg~4:W
j1K~zG
private static class MaxHeap{ GuL0:,
QL2LIs
void init(int[] data){ F`,bFQ
this.queue=new int[data.length+1]; myOW^
for(int i=0;i queue[++size]=data; ^Dfqc-]
fixUp(size); K~^o06 Y
} egfd=z=2un
} 4PU@W o
D0S^Msk9L
private int size=0; ~WV1t][
k@n L(2
private int[] queue; "OkZ [E)
ix?Z:pIS0
public int get() { rXTdhw?+
return queue[1]; "av/a
} Jzy:^PObT
f1o^:}5x
public void remove() { xZV|QVY;
SortUtil.swap(queue,1,size--); b!"qbC1
fixDown(1); +[S<"}ls7
} #Ak9f-pf
file://fixdown AtAu$"ue
private void fixDown(int k) { 6*>vie
int j; @&Yl'&pn-R
while ((j = k << 1) <= size) { _wW"Tn]
if (j < size %26amp;%26amp; queue[j] j++; $mf6!p4
if (queue[k]>queue[j]) file://不用交换 ci 22fw0
break; m<cv3dbZo
SortUtil.swap(queue,j,k); Xfg?\j/
k = j; ^y|`\oyqwN
} d=\\ik8
} QOJ5
private void fixUp(int k) { NW21{}=4
while (k > 1) { ^tjM1uaZ5(
int j = k >> 1; kqC7^x
if (queue[j]>queue[k]) S|yDGT1
break; dOgc%(kz
SortUtil.swap(queue,j,k); mwz!7Q
k = j; H6$pA^
} yB;K|MXy?
} 6Ol)SQE,
!@+4&B=
} ~_-+Q=3
{K/xI
} i5*/ZA_
!g~u'r'1
SortUtil： Di$++T8"
8<EU|/O
package org.rut.util.algorithm; f=4q]y#& X
6"+bCx0:
import org.rut.util.algorithm.support.BubbleSort; AVc|(~V
import org.rut.util.algorithm.support.HeapSort; kCoEdQ_
import org.rut.util.algorithm.support.ImprovedMergeSort; _XI,z0(
import org.rut.util.algorithm.support.ImprovedQuickSort; =`V9{$i
import org.rut.util.algorithm.support.InsertSort; +~lPf.
import org.rut.util.algorithm.support.MergeSort; "(\]-%:7
import org.rut.util.algorithm.support.QuickSort; Nlm3RxSn
import org.rut.util.algorithm.support.SelectionSort; }~<9*M-P
import org.rut.util.algorithm.support.ShellSort; ^7$Q"
#'y^@90R
/** D r6u0rx8
* @author treeroot f2Tz5slE
* @since 2006-2-2 5VLC\QgK^
* @version 1.0 >-CNHb
*/ 9\6ZdnEKu,
public class SortUtil { (xBWxeL~
public final static int INSERT = 1; K!!#";Eo
public final static int BUBBLE = 2; [Ue"#w
public final static int SELECTION = 3; %#lJn.o
public final static int SHELL = 4; 9NC'iFQ#
public final static int QUICK = 5; \!r,>P
public final static int IMPROVED_QUICK = 6; o{K#LP
public final static int MERGE = 7; iN+&7#x;/
public final static int IMPROVED_MERGE = 8; r5!Sps3B
public final static int HEAP = 9; M/8EaQs}
{ %af
public static void sort(int[] data) { sYyya:ykxT
sort(data, IMPROVED_QUICK); <%LN3T
} t^<ki?*
private static String[] name={ XZpF<7l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~5_>$7L>
}; Z%Yq{tAt
e5m-7{h@
private static Sort[] impl=new Sort[]{ uhr&P4EW
new InsertSort(), 2?9gf,U
new BubbleSort(), ?_G?SQ
new SelectionSort(), ZfWF2%]<
new ShellSort(), 0tah$;c e
new QuickSort(), <0^L L
new ImprovedQuickSort(), UP e@>
new MergeSort(), c UHKE\F
new ImprovedMergeSort(), ~HyqHxy
new HeapSort() %0^taA
}; N:7;c}~
DTSK*a`
public static String toString(int algorithm){ 3h>56{P
return name[algorithm-1]; H{fOAv1*
} c=\H&x3X
kX:d?*{KB
public static void sort(int[] data, int algorithm) { DM)%=C6<
impl[algorithm-1].sort(data); *lws7R
} ;kiL`K
uMM?s?q
public static interface Sort { KZt4 dr
public void sort(int[] data); H+2m
} bG[)r
*[O)VkL\%i
public static void swap(int[] data, int i, int j) { I^yInrRh5
int temp = data; BF(.^oh"n0
data = data[j]; -H(\[{3{V
data[j] = temp; x9B{|+tIoc
} I~P]_DmM
} 8 ,<F102(