[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; mz'8
} '11hIu=:
int i1=l; <!$Cvx\U
int i2=mid+1; 'iK*#b8l
for(int cur=l;cur<=r;cur++){ H-lRgJdc
if(i1==mid+1) ]z NL+]1_
data[cur]=temp[i2++]; :g_ +{4
else if(i2>r) W0hLh<Go
data[cur]=temp[i1++]; #}?$mxME*
else if(temp[i1] data[cur]=temp[i1++]; A(5? ci
else |3@]5f&
data[cur]=temp[i2++]; )BDi2: u
} ),|bP`V
} #k, kpL<a
YSmz)YfX9
} euK!JZ
af{K4:I
改进后的归并排序: SNFz#*
['<rfK
package org.rut.util.algorithm.support; iqYc&}k,
]T`qPIf;yJ
import org.rut.util.algorithm.SortUtil; *z~Y*Q0
rKxk?}
/** i"@?eq#h
* @author treeroot SQK6BEjE8
* @since 2006-2-2 ;2}Gqh)Yr
* @version 1.0 M"V@>E\L
*/ 3ji#"cX
public class ImprovedMergeSort implements SortUtil.Sort { .>e~J+oL
glpdYg *
private static final int THRESHOLD = 10; 6(=:j"w0
;RI,zQ
/* ~ln,Cm} 4
* (non-Javadoc) # L R[6l
* umeb&\:8S-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f#jAjzmYL
*/ @lI/g
public void sort(int[] data) { /k,p]/e
int[] temp=new int[data.length]; KN=Orx7Gy
mergeSort(data,temp,0,data.length-1); |r%P.f:y{X
} i%iU_`
,MJZ*"V/3
private void mergeSort(int[] data, int[] temp, int l, int r) { *V/SI E*8
int i, j, k; CT : ac64
int mid = (l + r) / 2; (g\'Zw5bk
if (l == r) JkmL'Zk>:
return; RK0IkRXQd
if ((mid - l) >= THRESHOLD) K+Qg=vGY
mergeSort(data, temp, l, mid); o0q{:An_Z
else T&%>/7I>
insertSort(data, l, mid - l + 1); .B@;ch,
if ((r - mid) > THRESHOLD) >jcNo3S
mergeSort(data, temp, mid + 1, r); J=sQ].EK
else %`~8j H@
insertSort(data, mid + 1, r - mid); ]=/f`
7@`(DU`z
for (i = l; i <= mid; i++) { cg4,PI%hz
temp = data; P*}Oi7Z
} I4$a#;
for (j = 1; j <= r - mid; j++) { h*Ej}_
temp[r - j + 1] = data[j + mid]; Uhf -}Jdw
} Sb<=ROCg@
int a = temp[l]; e&:fzO<~I
int b = temp[r]; &EMm<(.]a
for (i = l, j = r, k = l; k <= r; k++) { czj[U|eB}=
if (a < b) { 0-@waK
data[k] = temp[i++]; CyE.q^Wm
a = temp; :Q%&:[2
} else { OS3J,f}<=
data[k] = temp[j--]; u5lj+?
b = temp[j]; 9i"3R0HN
} sbRg=k&Ns
} ZnQnv@{8l
} d{0>R{uac
te1lUQ
/** *e^ZH
* @param data E*kS{2NAq
* @param l j"f]pzg&
* @param i X%;,r 2g
*/ wc;5tb#
private void insertSort(int[] data, int start, int len) { /q]WV^H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @x)z" )>
} Ouj5NL
} HGPbx$!
} qoEOM%dAqV
} #0weN%
JAgec`T%
堆排序： GU=h2LSi]
)xi|BqQz
package org.rut.util.algorithm.support; fz:F*zT1
Y#uf 2>J
import org.rut.util.algorithm.SortUtil; eM8u ;i
%F03cI,
/** 0evG
* @author treeroot ZV&=B%J bs
* @since 2006-2-2 8R)*8bb
* @version 1.0 ,5<-\"{]
*/ a-hF/~84S:
public class HeapSort implements SortUtil.Sort{ b+hZ<U/
I5
/* (non-Javadoc) %uQ^mK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 64[j:t=N
*/ X^"95Ic
public void sort(int[] data) { anv_I=
MaxHeap h=new MaxHeap(); Q5baY\"9^
h.init(data); &bTadd%0
for(int i=0;i h.remove(); R9{6$djq\:
System.arraycopy(h.queue,1,data,0,data.length); |rsu+0Mtz
} qxk1Rzm?x
az7L0pp
private static class MaxHeap{ )KkA<O}f
nAg|m,gA
void init(int[] data){ }(ot IqE
this.queue=new int[data.length+1]; .{~ygHQ`f
for(int i=0;i queue[++size]=data; !k Hpw2
fixUp(size); )R,*>-OPJL
} _^Rf*G!
} }[?X%=
Gh|q[s*k
private int size=0; pZF`+642
pl'n 0L<l
private int[] queue; ^+!!:J|ra
*S`& XPj
public int get() { 'lg6<M%#[
return queue[1]; BIS5u4
} eCdMDSFO3
Ez+.tbEA,
public void remove() { sYgpK92
SortUtil.swap(queue,1,size--); k oZqoP
fixDown(1); 67%o83\
} g/J ^YT!
file://fixdown vaS/WEY
private void fixDown(int k) { d 6j'[
int j; H~Hh$-z
while ((j = k << 1) <= size) { ['e8Xz0
if (j < size %26amp;%26amp; queue[j] j++; G"3D"7fa
if (queue[k]>queue[j]) file://不用交换 =;`+^
break; 7J.alV4`/
SortUtil.swap(queue,j,k); +)dQd T0Fq
k = j; <Pg4>
} xOp8[6Ga'
} "~> # ;x{
private void fixUp(int k) { 58ev (f
while (k > 1) { Yx>=(B
int j = k >> 1; OxZw;yD
if (queue[j]>queue[k]) |Rf4^vN
break; Kp!sn,:
SortUtil.swap(queue,j,k); :?O+EE
k = j; )u7y.o
} %lF}!
} 0V}knR.l
NffZttN
} c!d>6:\
I&,gCZ#
} 3){ /u$iH.
-U`]/
SortUtil： y 4j0nF
xxLD8?@e7
package org.rut.util.algorithm; *F42GiBZR
UC"<5z lcu
import org.rut.util.algorithm.support.BubbleSort; \#?n'qyj
import org.rut.util.algorithm.support.HeapSort; EZ15
import org.rut.util.algorithm.support.ImprovedMergeSort; -Jr6aai3+
import org.rut.util.algorithm.support.ImprovedQuickSort; #T &z`
import org.rut.util.algorithm.support.InsertSort; 38ChS.(
import org.rut.util.algorithm.support.MergeSort; Ztu _UlGC
import org.rut.util.algorithm.support.QuickSort; # xx{}g]%
import org.rut.util.algorithm.support.SelectionSort; (,z0V+!
import org.rut.util.algorithm.support.ShellSort; z~i=\/~tZ
(qG |.a
/** } Wx#"6
* @author treeroot tXDO@YH3S
* @since 2006-2-2 G$kspN*"A
* @version 1.0 8VxjC1v+
*/ {ULyB$\-
public class SortUtil { Y??8P
public final static int INSERT = 1; -L<''2t
public final static int BUBBLE = 2; gb:)t}|
public final static int SELECTION = 3; ~Y]*TP
public final static int SHELL = 4; = zJY5@^'7
public final static int QUICK = 5; $Pv;>fHu
public final static int IMPROVED_QUICK = 6; A&u"NgJ
public final static int MERGE = 7; ;[9WB<t
public final static int IMPROVED_MERGE = 8; 7v\K,P8
public final static int HEAP = 9; Q%:#xG5AmE
\@6PA
public static void sort(int[] data) { lW}"6@0,
sort(data, IMPROVED_QUICK); WPLM*]6
} H=Sy.
private static String[] name={ N&ZIsaK,j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jF4h/((|EU
}; 29#&q`J
;/.ZjTRw
private static Sort[] impl=new Sort[]{ /4w"akB|P
new InsertSort(), ^D`ARH
new BubbleSort(), e}e|??'(\
new SelectionSort(), *p)1c_
new ShellSort(), Ewg5s?2|
new QuickSort(), RDX".'`(=
new ImprovedQuickSort(), >:7W.QLRU
new MergeSort(), k\,01Y^
new ImprovedMergeSort(), G;r-f63N
new HeapSort() Okd?=*sBx
}; i&KD)&9b#
1%W|>M`
public static String toString(int algorithm){ TK"!z(p
return name[algorithm-1]; nU]4)t_o\
} ai/VbV'|
erG@8CG
public static void sort(int[] data, int algorithm) { Q5R7se_
impl[algorithm-1].sort(data); i^hgs`hvU
} Nc4e,>$]&
l+$e|F
public static interface Sort { 5|zISK%zHS
public void sort(int[] data); OW$? 6
} %DJxUuh
8!e1T,:b
public static void swap(int[] data, int i, int j) { RJMrSz$
int temp = data; :{pJ
data = data[j]; +{* @36A5A
data[j] = temp; k:D;C3vJd
} S].=gR0:
} JvFU7`4@