[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; :e1'o
} ^9&b+u=X
int i1=l; ,LhEshf
int i2=mid+1; -#hK|1]
for(int cur=l;cur<=r;cur++){ Q]< (bD.7
if(i1==mid+1) +"'F Be
data[cur]=temp[i2++]; vG Y!4@[
else if(i2>r) Ci;h
data[cur]=temp[i1++]; xTW3UY
else if(temp[i1] data[cur]=temp[i1++]; +'-rTi\
else bfFmTI$,
data[cur]=temp[i2++]; 31WZJm^
} $Axng J c
} <5dH *K
x+4vss
} iJ}2"i7M
m&Lt6_vi
改进后的归并排序: Z.!g9fi8>
egfi;8]E
package org.rut.util.algorithm.support; Osnyd+dJY
E]NY (1
import org.rut.util.algorithm.SortUtil; f%c06Un=
"X`RQ6~]>
/** BsKbn@'uC
* @author treeroot p~h4\.*`
* @since 2006-2-2 t)LU\!
* @version 1.0 Q/p(#/y#b
*/ IWQ&6SDW$z
public class ImprovedMergeSort implements SortUtil.Sort { Bb~5& @M|N
d+tj%7
private static final int THRESHOLD = 10; 0f1H8zV
L#n}e7Y9
/* JfMJF[Mb
* (non-Javadoc) L^lS^P
* tyB)HF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8$ic~eJ
*/ 1YFeVMc
public void sort(int[] data) { (#oYyM]
int[] temp=new int[data.length]; 2xDQ:=ec
mergeSort(data,temp,0,data.length-1); J==}QEhQ{
} ?FN9rhAC
f3!n$lj
private void mergeSort(int[] data, int[] temp, int l, int r) { h6g:(3t6m
int i, j, k; L/BHexOB
int mid = (l + r) / 2; !}ilN 1>
if (l == r) {gsW(T>)
return; ,(P %z.P@
if ((mid - l) >= THRESHOLD) D3y>iQd
mergeSort(data, temp, l, mid); wS V@=)H\:
else ?1CJf>B>
insertSort(data, l, mid - l + 1); `|Ey)@w
if ((r - mid) > THRESHOLD) !nwbj21%
mergeSort(data, temp, mid + 1, r); SZ/(\kQ6
else >5.zk1&H
insertSort(data, mid + 1, r - mid); `$at9
okz]Qc>G
for (i = l; i <= mid; i++) { EY~7oNfc`R
temp = data; ! tGiTzzp
} ?~,JY
for (j = 1; j <= r - mid; j++) { gwiR/(1
temp[r - j + 1] = data[j + mid]; Tv\HAK<N
} ~ 7}]
int a = temp[l]; YZ< NP
int b = temp[r]; 7aQn;
for (i = l, j = r, k = l; k <= r; k++) { 6GzzGP^
if (a < b) { ojoxXly`
data[k] = temp[i++]; N`HSE=u>
a = temp; DwXU
} else { pw3(t
data[k] = temp[j--]; S;8.yj-
b = temp[j]; 6}ftBmv
} iT.|vr1HG
} ^7Lk-a7gp
} bEd?^h
zks#EzQ
/** ;,rnk-
* @param data d@ZoV
* @param l /ERNS/w
* @param i Zi/-~')E
*/ 6 Uw;C84!
private void insertSort(int[] data, int start, int len) { _dr*`yXi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yX'IZk#_L
} KaW~ERx5
} Rboof`pVt
} D-pX<0-y
} >! oF0R_<
:G}DAUFN
堆排序： tq&Yek>C
#/+I*B*y
package org.rut.util.algorithm.support; B'p5M.6d#:
ra:GzkIw
import org.rut.util.algorithm.SortUtil; :CTL)ad2
MtUY?O.P2
/** n+?-�
* @author treeroot :_Fxy5}
* @since 2006-2-2 Hd0Xx}3&
* @version 1.0 Vv7PCaq
*/ Xhse~=qA
public class HeapSort implements SortUtil.Sort{ P>wZ~Hjk
#h N.=~
/* (non-Javadoc) #V[SQ=>x[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) | ]# +v@
*/ C_G1P)k
public void sort(int[] data) { IY)5.E _
MaxHeap h=new MaxHeap(); SKR;wu
h.init(data); G#0,CLGN^
for(int i=0;i h.remove(); #ZlM?Q
System.arraycopy(h.queue,1,data,0,data.length); BFh$.+D
} /cfHYvnz
Rg&19}BU
private static class MaxHeap{ -NzTqLBn
gI{ =0
void init(int[] data){ <HF-2?`
this.queue=new int[data.length+1]; \Yq0 zVol
for(int i=0;i queue[++size]=data; "0-y*1/m
fixUp(size); lR@& Z6lw
} W2<3C
} K/|
.&iN(Bd
private int size=0; A"4@L*QV
3ji:O T
private int[] queue; + |C=ZU
^f|<R8`
public int get() { -k{Jp/-D
return queue[1]; L\L"mc|O
} 7|Dn+=
lw[<STpD;
public void remove() { ([KN*OF
SortUtil.swap(queue,1,size--); XG&K32_fs
fixDown(1); X NE+(Bt
} }0;Sk(B>
file://fixdown C[8KlD
private void fixDown(int k) { \Ye%o}.{
int j; iBoEZEHjw
while ((j = k << 1) <= size) { {eR9 ;2!
if (j < size %26amp;%26amp; queue[j] j++; bSrZ{l
if (queue[k]>queue[j]) file://不用交换 ]"sRS`0+
break; v[&'k\
SortUtil.swap(queue,j,k); m7m \`;
k = j; cPuHLwwYf
} e$wt&^W
} Uh}X<d/V
private void fixUp(int k) { Spgg+;9
while (k > 1) { B 8{ uR
int j = k >> 1; jczq`yW
if (queue[j]>queue[k]) _Adsq8sFW
break; %v4ZGtKC@
SortUtil.swap(queue,j,k); Tpzw=bC^
k = j; Rd%0\ B
} KlUqoJ;"
} d#\W hRE
A[H;WKn0
} C9jbv/c
GN%(9N'W
} _7@z_i_c
^i`*Wm@!
SortUtil： h|p[OecG
R1'`F{56
package org.rut.util.algorithm; ?N>pZR
e{C6by"j{S
import org.rut.util.algorithm.support.BubbleSort; F=}Z51|:~
import org.rut.util.algorithm.support.HeapSort; 2Va4i7"X\
import org.rut.util.algorithm.support.ImprovedMergeSort; c7qwNs*f
import org.rut.util.algorithm.support.ImprovedQuickSort; [H,u)8)
import org.rut.util.algorithm.support.InsertSort; !8$RBD %
import org.rut.util.algorithm.support.MergeSort; YqU/\f+
import org.rut.util.algorithm.support.QuickSort; JJ5C}`(
import org.rut.util.algorithm.support.SelectionSort; frqJN
import org.rut.util.algorithm.support.ShellSort; z*LiweR-
hZN<Yd8:
/** ]k*1KP
* @author treeroot ,4Y*:JU4
* @since 2006-2-2 [6RfS
* @version 1.0 gX,9Gh
*/ ow.j+<M
public class SortUtil { oT3Y!Y3=<
public final static int INSERT = 1; &+r4
public final static int BUBBLE = 2; p4wr`"Zz
public final static int SELECTION = 3; te'*<HM
public final static int SHELL = 4; JD~aUB%
public final static int QUICK = 5; &71e5<(dG
public final static int IMPROVED_QUICK = 6; (F8AL6
public final static int MERGE = 7; {oWsh)[x2
public final static int IMPROVED_MERGE = 8; 6[?}6gQ
public final static int HEAP = 9; sX:lE^)-z
Zq*eX\#C
public static void sort(int[] data) { uA\J0"0;}
sort(data, IMPROVED_QUICK); BXhWTGiG
} VPd,]]S5(
private static String[] name={ n+oDC65[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <LA^%2jT
}; ( v@jc8y
VJ{pN~_1
private static Sort[] impl=new Sort[]{ SI*^f\lu
new InsertSort(), <y>:B}9'
new BubbleSort(), )i!^]|$
new SelectionSort(), Dg2uE8k
new ShellSort(), 7>-yaL{
new QuickSort(), %j{.0H
new ImprovedQuickSort(), QIV%6q+*R
new MergeSort(), h^M^7S
new ImprovedMergeSort(), %^.P~s6
new HeapSort() I]uhi{\C
}; @2e2^8X7f
Pp_V5,i\
public static String toString(int algorithm){ 9Nt3Z>d
return name[algorithm-1]; \9/1L?@
} /cY^]VLe
($WE=biZ&
public static void sort(int[] data, int algorithm) { k'+}92 o
impl[algorithm-1].sort(data); , Oli
} @vs@>CYdz
~7SH4Cr
public static interface Sort { J70D+
public void sort(int[] data); >o[|"oLO
} L2|aHI1'l
0*7*RX
public static void swap(int[] data, int i, int j) { }*kJ-q&0
int temp = data; LfX0Z=<
data = data[j]; .ECHxDp
data[j] = temp; !R:y'Y%j
} cZQu*K^j
} *gu8-7'