[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; @%fTdneH
} bN-!&Td
int i1=l; ,K[e?(RP
int i2=mid+1; ,KJHYm=Q
for(int cur=l;cur<=r;cur++){ TC-Vzk G|
if(i1==mid+1) qkKl;Z?Y:
data[cur]=temp[i2++]; ;N#}3lpLqg
else if(i2>r) g"748LY>=p
data[cur]=temp[i1++]; |\dv$`_T
else if(temp[i1] data[cur]=temp[i1++]; -$"$r ~ad
else =Rx4ZqTI|
data[cur]=temp[i2++]; O:#YLmbCN
} rJGh3%
} pl%!AY'oE>
<y8oYe_!
} Tr_gc~
$F^VtCx2&
改进后的归并排序: F%<*a,m6g
!`%j#bv
package org.rut.util.algorithm.support; XA<h,ONE?
O|sk"YXF
import org.rut.util.algorithm.SortUtil; PwW$=M{\.
Xk.OyQ@
/** K ,NmDc^
* @author treeroot 8Azh&c
* @since 2006-2-2 ,r*Kxy
* @version 1.0 EF!J#N2
*/ ;4!H- qZ
public class ImprovedMergeSort implements SortUtil.Sort { K@*+;6y@
;U>nj],uv
private static final int THRESHOLD = 10; YIwa =^
W+;=8S
/* ;&<N1
* (non-Javadoc) }xC2~
* G+N1#0,q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V<#KFm$>C
*/ nBp6uNK[
public void sort(int[] data) { )qb'tZz/g_
int[] temp=new int[data.length]; 5H.~pc2y
mergeSort(data,temp,0,data.length-1); <L8|Wz
} !b_(|~7Lc
we[+6Z6J
private void mergeSort(int[] data, int[] temp, int l, int r) { l#enbQ`-~
int i, j, k; BW)-F (v
int mid = (l + r) / 2; 7:olStK
if (l == r) lND2Kb
return; m[xl)/e
if ((mid - l) >= THRESHOLD) jbipNgxkr
mergeSort(data, temp, l, mid); `2]0 X#R
else 'y;Kj
insertSort(data, l, mid - l + 1); 1W'Ai"DLw
if ((r - mid) > THRESHOLD) %?+vtX
mergeSort(data, temp, mid + 1, r); +ZNOvcsV
else \1G'{#Q
insertSort(data, mid + 1, r - mid); =tD*,2]
AC1RP`c
for (i = l; i <= mid; i++) { K7`6G[RMb
temp = data; hUi@T}aA|
} %<-OdyM
for (j = 1; j <= r - mid; j++) { .2c/V
temp[r - j + 1] = data[j + mid]; l+@;f(8}
} pp"#pl
int a = temp[l]; s4_Dqm
int b = temp[r]; Zpg;hj5_
for (i = l, j = r, k = l; k <= r; k++) { enJ;#aA
if (a < b) { Qwpni^D8j
data[k] = temp[i++]; uQ-GJI^t
a = temp; =( |%%,3
} else { }qso} WI
data[k] = temp[j--]; ]Z5m_-I
b = temp[j]; R?iCJ5m
} Qz(2Iu{E]
} c+3`hVV
} QO}~"lMj
SM8N*WdiU
/** 8^}/T#l
* @param data E#+2)Q
* @param l Xd%qebK
* @param i \ji\r]k
*/ *|Vf1R]
private void insertSort(int[] data, int start, int len) { :ZY%-]u7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3eE=>E4,
} :rU.5(,
} 3S3(Gl
} +"-l~`+<es
} u!|_bI3
je^VJ&ac
堆排序： syBpF:`-W
1<'z)r4
package org.rut.util.algorithm.support; D/Ki^E
^nNY| *
import org.rut.util.algorithm.SortUtil; ]]K?Q )9x
x9>$197
/** */h(4Hz
* @author treeroot 3XlQ4
* @since 2006-2-2 fE~KWLm
* @version 1.0 y!gPBkG&3n
*/ xR0*w7YE
public class HeapSort implements SortUtil.Sort{ e-y$&[
?YR;o4
/* (non-Javadoc) d.+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vU,7Y|t`
*/ V\zcv@
public void sort(int[] data) { (.P}>$M9
MaxHeap h=new MaxHeap(); `f}s<At
h.init(data); z)hK2JD
for(int i=0;i h.remove(); 8%CznAO"?W
System.arraycopy(h.queue,1,data,0,data.length); 68,j~e3-i
} MS;^:t1`
d]e36Dwk
private static class MaxHeap{ QD,m`7(
k_]'?f7Z
void init(int[] data){ S.`y%t.GP
this.queue=new int[data.length+1]; !6=s{V&r1
for(int i=0;i queue[++size]=data; s`=| D'G(=
fixUp(size); &*OwoTgk+
} }&=l)\e
} OU%"dmSDk
g/.FJ-I*
private int size=0; M}o.= Iqa
zNX=V!$
private int[] queue; #a=]h}&1?
&mN]U<N
public int get() { f?.VVlD
return queue[1]; Wd7*7']
} r5s{t4 ;Ch
(E0WZ$f}
public void remove() { dY}5Kmt
SortUtil.swap(queue,1,size--); NOs00H
fixDown(1); v];YC6shx
} &'12,'8
file://fixdown ThX3@o
private void fixDown(int k) { <fHHrmZ#/.
int j; F.y_H#h
while ((j = k << 1) <= size) { Jf2JGTcm
if (j < size %26amp;%26amp; queue[j] j++; X[?fU&
if (queue[k]>queue[j]) file://不用交换 }Y7P2W+4?
break; _qPKdGoM
SortUtil.swap(queue,j,k); ]zj#X\
k = j; 7fypUQ:y
} W^3 Jg2gE
} \"ogQnmz
private void fixUp(int k) { 0"e["q{|
while (k > 1) { p+iNi4y@
int j = k >> 1; 9`92 >
if (queue[j]>queue[k]) VE]TT><
break; #L!`n)J"
SortUtil.swap(queue,j,k); %TI3Eb
k = j; jX4$PfOhR
} ^!^M Gzu
} -sv%A7i
r jn:E
} Caj H;K\
!4cCq_
} Hx+r9w
?a,#p
SortUtil： 6P@K]jy& n
cu1!WD
package org.rut.util.algorithm; 8zMGpY#
rEp\ld
import org.rut.util.algorithm.support.BubbleSort; 40=u/\/K
import org.rut.util.algorithm.support.HeapSort; 4PD5i
import org.rut.util.algorithm.support.ImprovedMergeSort; )kjQ W&)g
import org.rut.util.algorithm.support.ImprovedQuickSort; bJPKe]spJ=
import org.rut.util.algorithm.support.InsertSort; rYt|[Pk
import org.rut.util.algorithm.support.MergeSort; 0B1nk!F
import org.rut.util.algorithm.support.QuickSort; `%[m%Y9h
import org.rut.util.algorithm.support.SelectionSort; IY.M#Q]
import org.rut.util.algorithm.support.ShellSort; >.UEs8QV
DW,ERQ^
/** {w3<dfJ
* @author treeroot J;XO1}9
* @since 2006-2-2 kJB:=iq/x$
* @version 1.0 vxf09v{-
*/ ABoB=0.l
public class SortUtil { nt_Cb*K<
public final static int INSERT = 1; K+/wJ9^B
public final static int BUBBLE = 2; fCu;n%
public final static int SELECTION = 3; T0fm6 J
public final static int SHELL = 4; b&E"r*i|
public final static int QUICK = 5; M3UC9t9]
public final static int IMPROVED_QUICK = 6; J0k!&d8
public final static int MERGE = 7; Tr>_R%bK
public final static int IMPROVED_MERGE = 8; 9E5*%Hu_
public final static int HEAP = 9; yT<"?S>D
n'vdA !R
public static void sort(int[] data) { IIMf\JdM
sort(data, IMPROVED_QUICK); < (9 BO&
} %ho?KU2j
private static String[] name={ LR.]&(kyd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !_+FuF"@
}; U7U&^s6`
I3.JAoB>!
private static Sort[] impl=new Sort[]{ _0 43,
new InsertSort(), ]Rf$&7`g{
new BubbleSort(), F&p42!"
new SelectionSort(), ?2o+x D2
new ShellSort(), "MzBy)4Q
new QuickSort(), H;a) `R3
new ImprovedQuickSort(), D dwFKc&
new MergeSort(), *>aVU'
new ImprovedMergeSort(), @ukL!AV?Y
new HeapSort() ~)pZ5%C
}; o:UNSr
oJ5n*[qUI
public static String toString(int algorithm){ '_DB0_Dp
return name[algorithm-1]; lhE]KdE3
} "}0QxogYE
l(QntP
public static void sort(int[] data, int algorithm) { (i{ZxWW&
impl[algorithm-1].sort(data); WUYU\J&q3
} rUV'DC?eE
Qg1kF^=
public static interface Sort { Iw] ylp
public void sort(int[] data); Tl"r#
} vfT @;`
iX2exJto
public static void swap(int[] data, int i, int j) { V?T&>s
int temp = data; 3`3my=
data = data[j]; qMVuBv
data[j] = temp; lM#/F\
} FN26f*/
} p;zT #%