[JAVA]用Java实现的各种排序

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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; o;>qsn8
} 6n H'NNS:J
int i1=l; w I[Hoi V
int i2=mid+1; Nhtc^DX
for(int cur=l;cur<=r;cur++){ c_Iq!MH
if(i1==mid+1) a!.Y@o5Ku
data[cur]=temp[i2++]; q[x|tO
else if(i2>r) [K1z/ea)V
data[cur]=temp[i1++]; /as+ TU`A
else if(temp[i1] data[cur]=temp[i1++]; rd,!-w5
else )"%J~:`h}
data[cur]=temp[i2++]; 1";s#Jq
} <kazV<"
} xPJ@!ks9
L%Ms?`i,
} sTvw@o*
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改进后的归并排序: U"Y/PBs,
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package org.rut.util.algorithm.support; n{=Ot^ ";
/< Dtu UM
import org.rut.util.algorithm.SortUtil; ?y,KN}s_
k<RaC=
/** `:d\L H
* @author treeroot A2.4#Qb'
* @since 2006-2-2 bL|$\'S
* @version 1.0 pxCQ=0k
*/ z}Vg4\x&
public class ImprovedMergeSort implements SortUtil.Sort { 0|,Ij$
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private static final int THRESHOLD = 10; 3pyE'9"f6
4W=fQx]
/* WUb] 8$n
* (non-Javadoc) NKiWt Z"
* [}5mi?v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E`|vu*l7
*/ J^zB5W,)
public void sort(int[] data) { M]xfH*
int[] temp=new int[data.length]; {uxTgX
mergeSort(data,temp,0,data.length-1); I(j$^DA.
} u.}H)wt
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private void mergeSort(int[] data, int[] temp, int l, int r) { !:v7SRUXb
int i, j, k; \T?6TDZ]
int mid = (l + r) / 2; l!:L<B
if (l == r) H>%L@Btw
return; ED>P>Gg
if ((mid - l) >= THRESHOLD) 'Jd*r(2d
mergeSort(data, temp, l, mid); kpMo7n
else #!P>.".
insertSort(data, l, mid - l + 1); (/ -90u
if ((r - mid) > THRESHOLD) sYB2{w
mergeSort(data, temp, mid + 1, r); Dn`
else z~ua#(z1S
insertSort(data, mid + 1, r - mid); V14+?L
GQ sE5Vb
for (i = l; i <= mid; i++) { SQ<{X/5
temp = data; B[d%?L_
} 3;AJp_;
for (j = 1; j <= r - mid; j++) { I~nz~U:ak
temp[r - j + 1] = data[j + mid]; Lzx2An@R
} spWo{
int a = temp[l]; }- wK
int b = temp[r]; ~VV$wU!A
for (i = l, j = r, k = l; k <= r; k++) { HrUE?Sq
if (a < b) { BadnL<cj]
data[k] = temp[i++]; BN6cu9a
a = temp; DXZZZ[#
} else { L0Ajj=
data[k] = temp[j--]; 3Te&w9K
b = temp[j]; :es=T`("A8
} Cv;#8Wj}
} JD9=gBN\?
} tD,I7%|@
B &3sV+
/** Kaji&Ibd
* @param data D-e?;<
* @param l D5Z)"~'
* @param i -op)X>
*/ fnIF<Zt
private void insertSort(int[] data, int start, int len) { c GyBml1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tRNMiU
} KGmAnN
} ((M>To_l
} z G`|)
} V`G^Jyj
w%(D4ldp
堆排序： k7]4TIUD*
7/iN`3Bz
package org.rut.util.algorithm.support; Yy,XKIqU
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import org.rut.util.algorithm.SortUtil; (Dn1Eov
h<qi[d4X
/** kV4L4yE
* @author treeroot +}eK8>2
* @since 2006-2-2 c=aZ[
* @version 1.0 )|W6Z
*/ uH#X:Vne
public class HeapSort implements SortUtil.Sort{ V{X/yN.u
=Z..&H5i
/* (non-Javadoc) x@D>JG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "BIhd*K[~
*/ g+Y &rz
public void sort(int[] data) { a6?t?:~|
MaxHeap h=new MaxHeap(); { T<[-"h
h.init(data); {U4{v=,!I
for(int i=0;i h.remove(); |hX\ep
System.arraycopy(h.queue,1,data,0,data.length); R7c42L\QA
} D`U,T&@
qCq?`0&#
private static class MaxHeap{ ,l.+$G
9%riB/vkrF
void init(int[] data){ S'`RP2P
this.queue=new int[data.length+1]; ,rOh*ebF
for(int i=0;i queue[++size]=data; h?vny->uJ
fixUp(size); <- R%
} 'C@yJf
} %BQ?DTtb7'
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private int size=0; 09i77
<[=[|DS l
private int[] queue; 8C*xrg#g:
sXYXBX[
public int get() { 5C9 .h:c4y
return queue[1]; rS+ >oP}
} z?GtC{L9
'a$/!~X
public void remove() { |)mUO:*
SortUtil.swap(queue,1,size--); M0hR]4T
fixDown(1); g!i45]6[Nw
} Z% ]LZ/O8
file://fixdown w^:@g~
private void fixDown(int k) { 5i'KGL
int j; e0IGx]5i
while ((j = k << 1) <= size) { QBA{*@ A-
if (j < size %26amp;%26amp; queue[j] j++; Z{2QDjAI;
if (queue[k]>queue[j]) file://不用交换 ,+x\NY2d
break; hl2|Ec
SortUtil.swap(queue,j,k); @KJmNM1]V
k = j; 3wQ\L=
} ;CuL1N#I
} G]dHYxG
private void fixUp(int k) { e~nh95
while (k > 1) { 0*j\i@
int j = k >> 1; 3f:]*U+O
if (queue[j]>queue[k]) '1d0 *5+6k
break; Hi U/fi`
SortUtil.swap(queue,j,k); %D7'7E8.
k = j; cW?6Iao
} 4-9cp=\PE
} "&\(:#L
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} BWr!K5w>i
B)dd6R>8
} mS.!lkV
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SortUtil： >b~Q%{1
!Nbi&^k B
package org.rut.util.algorithm; `.wgRUhFH;
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import org.rut.util.algorithm.support.BubbleSort; `:2np{
import org.rut.util.algorithm.support.HeapSort; kjr q;j:
import org.rut.util.algorithm.support.ImprovedMergeSort; 0|{":i_s
import org.rut.util.algorithm.support.ImprovedQuickSort; I]~s{I(EK
import org.rut.util.algorithm.support.InsertSort; ncpA\E;ff^
import org.rut.util.algorithm.support.MergeSort; T,B%iZgCh
import org.rut.util.algorithm.support.QuickSort; QRF:6bAxsL
import org.rut.util.algorithm.support.SelectionSort; %v^qQWy=*
import org.rut.util.algorithm.support.ShellSort; k"cKxzB
G$~hAZ
/** 3Q,p,
* @author treeroot McN'J.Sxp
* @since 2006-2-2 Rli`]~!w
* @version 1.0 #t VGqf
*/ @;[.#hK
public class SortUtil { S-brV\v7
public final static int INSERT = 1; buHUBn[3)
public final static int BUBBLE = 2; !H @nAz
public final static int SELECTION = 3; UaHN*@
public final static int SHELL = 4; fUJe{C<H
public final static int QUICK = 5; Z#K0a'
public final static int IMPROVED_QUICK = 6; Mi`t$hmP
public final static int MERGE = 7; _HAr0R8BY
public final static int IMPROVED_MERGE = 8; ke'OT>8
public final static int HEAP = 9; }-&#vP~I
^SS9BQ*m
public static void sort(int[] data) { ^(:na6C
sort(data, IMPROVED_QUICK); %F<3_#Y
} t'C9;
private static String[] name={ N9z!-y'X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K81&BVx/
}; + Cq&~<B
eqpnh^0}d
private static Sort[] impl=new Sort[]{ l%`~aVGJ
new InsertSort(), |~=4ZrcCP
new BubbleSort(), UQtG<W]<
new SelectionSort(), d"+ _`d=`
new ShellSort(), vY,]f^F"
new QuickSort(), Tn$| Xa+:s
new ImprovedQuickSort(), :5:_Dr<
new MergeSort(), w aDJ
new ImprovedMergeSort(), |8\et
new HeapSort() Q}#H|@
}; >~&7D`O
S7CD#Y[s
public static String toString(int algorithm){ aIN?|Ch
return name[algorithm-1]; /ZSdY_%s
} w Qp{z
UZE%!OWpeK
public static void sort(int[] data, int algorithm) { p+{*w7?8"[
impl[algorithm-1].sort(data); @Tsdgx8
} 9(BB>o54r
o2LUB)=R'
public static interface Sort { <Q.-WV]Z
public void sort(int[] data); M5S<N_+Pe
} ?QzN\fY;
~ o5h}OU"
public static void swap(int[] data, int i, int j) { ;fv/s]X86I
int temp = data; =}W)%Hldr.
data = data[j]; ralU9MN.
data[j] = temp; hPUYq7B
} 3[To"You
} KYFkO~N