[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; g5\EVcHkz
} %mO.ur>21
int i1=l; v J_1VW
int i2=mid+1; =B/Ac0Y
for(int cur=l;cur<=r;cur++){ 8+?|4'\`
if(i1==mid+1) {SQ#n@Q&$
data[cur]=temp[i2++]; d:_3V rRZ
else if(i2>r) )~Pj3
data[cur]=temp[i1++]; ]y**ZFA
else if(temp[i1] data[cur]=temp[i1++]; kwM1f=!-
else W/\M9
data[cur]=temp[i2++]; ]46-TuH
} ){sn!5=
} t=6[FK
KkCA*GS
} T2%{pcdV/
fbjT"jSzw
改进后的归并排序: av!'UZP
]9 ArT$
package org.rut.util.algorithm.support; D2@J4;UW*W
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import org.rut.util.algorithm.SortUtil; b}C6/zW
CZ~%qPwDw
/** $3BH82
* @author treeroot p bT sn
* @since 2006-2-2 ?kF_C,k/>N
* @version 1.0 #cF ?a5
*/ CkHifmc(u-
public class ImprovedMergeSort implements SortUtil.Sort { X`+8rO[
^T.icSxP
private static final int THRESHOLD = 10; 8Q*477=I
Y~fa=R{W
/* n6 VX0R
* (non-Javadoc) in[yrqFb7t
* x3QQ`w-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bo]= *
*/ "A>/m"c]*
public void sort(int[] data) { %"C%pA
int[] temp=new int[data.length]; ;r1.Uz(
mergeSort(data,temp,0,data.length-1); NmH:/xU?^
} oE;SZ"$x
k/`WfSM\.
private void mergeSort(int[] data, int[] temp, int l, int r) { <jk.9$\$A
int i, j, k; 6%^9`|3
int mid = (l + r) / 2; 50?5xSEM0_
if (l == r) Pi!3wy
return; DEFh&n
if ((mid - l) >= THRESHOLD) /+p]VHP\
mergeSort(data, temp, l, mid); m|%L[h1
else ,Qw\w,
insertSort(data, l, mid - l + 1); SBbPO5^](
if ((r - mid) > THRESHOLD) 4_i6qu(4
mergeSort(data, temp, mid + 1, r); 1k:s~m?!
else ;Q}pmBkqB
insertSort(data, mid + 1, r - mid); #n5DK{e
8#_"WzDw
for (i = l; i <= mid; i++) { A $GiO
temp = data; -:jC.} Y
} 8K;wX%_,
for (j = 1; j <= r - mid; j++) { "+BNas^rF
temp[r - j + 1] = data[j + mid]; _]/&NSk
} M6MtE_E
int a = temp[l]; f:K3 P[|
int b = temp[r]; }vof| (Yh
for (i = l, j = r, k = l; k <= r; k++) { "x"y3v'
if (a < b) { h{BO\^6x
data[k] = temp[i++]; _ITA$#
a = temp; 9si,z
} else { mKh<M)Bz
data[k] = temp[j--]; L>PPAI
b = temp[j]; %(v<aEQtt
} @9}SHS
} !vQDPLBL
} 4pw:O^v
Rc.8j,]
/** x#0B "{
* @param data Q|1X|_hs
* @param l E{#Y=
* @param i J nzI- y
*/ 1oVjx_I5y
private void insertSort(int[] data, int start, int len) { L74Sx0nk=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 28jm*Cl8
} <M,A:u\qSQ
} $At,D.mGkb
} }aJK^>^>A
} xdV $dDCT
WER\04%D\m
堆排序： f[;l7
M)T{6w
package org.rut.util.algorithm.support; +'{@Xe}
+P//p$pE
import org.rut.util.algorithm.SortUtil; xy.di9
,TdL-a5
/** >8>}o4Q/X
* @author treeroot X"z!52*3]
* @since 2006-2-2 7K\H_YY8#
* @version 1.0 OM4q/!)A]
*/ HXg4 T
public class HeapSort implements SortUtil.Sort{ S$egsK"~
Ts~)0
/* (non-Javadoc) tc%0yr9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zt7Gf
*/ |:{H4
public void sort(int[] data) { F,l%SQCyj
MaxHeap h=new MaxHeap(); /[|ODfY
h.init(data); .}6Mj]7?i
for(int i=0;i h.remove(); DX$zzf
System.arraycopy(h.queue,1,data,0,data.length); qt !T%K
} Wt8=j1>
~ ""?:
private static class MaxHeap{ r:n-?P
Hswgv$n
void init(int[] data){ ^1 P@BRh
this.queue=new int[data.length+1]; n!>#o1Qr
for(int i=0;i queue[++size]=data; ?4&C)[^
fixUp(size); 1MF0HiC
} g12mSbf=9
} hV6=-QL*B
u3XQ<N{Gj
private int size=0; Jjgy;*hM
x(UOt;
private int[] queue; J91O$szA
M^$liS.D
public int get() { w' gKE'c
return queue[1]; ~l=Jx*
} |##rs
&\_cU?0d
public void remove() { ?7:?OX
SortUtil.swap(queue,1,size--); 8pQ:B/3=
fixDown(1); i H^Gv*
} HR> X@g<c
file://fixdown [61T$.
private void fixDown(int k) { WV8?zB1
int j; lW8!_h"G`n
while ((j = k << 1) <= size) { ]PI|Xl
if (j < size %26amp;%26amp; queue[j] j++; !KEnr`O2u
if (queue[k]>queue[j]) file://不用交换 xqAXfJ.
break; ~1`ZPLVG
SortUtil.swap(queue,j,k); e#uk+]
k = j; z12c9k%s
} ?g5u#Q>!
} 1Z+\>~8
private void fixUp(int k) { KJf~9w9U
while (k > 1) { 5jYZ+OB
int j = k >> 1; ny,a5zEnF
if (queue[j]>queue[k]) ^:yg,cS|Be
break; pOz4>R
SortUtil.swap(queue,j,k); *YI>Q@F9
k = j; npW1Z3n
} vG7aT
} ^z^ UFW
:<}.3Q?&
} xg>AW Q
jP-=x(
} ji|`S\u#b
h{sY5d'D
SortUtil： LE"t'R
Y.<&phv
package org.rut.util.algorithm; p^s k?E
)L%i"=<Bdy
import org.rut.util.algorithm.support.BubbleSort; #Ang8O@y
import org.rut.util.algorithm.support.HeapSort; #O |Z\|n
import org.rut.util.algorithm.support.ImprovedMergeSort; mOUIGlv
import org.rut.util.algorithm.support.ImprovedQuickSort; GG}(*pOr
import org.rut.util.algorithm.support.InsertSort; J7C2:zj
import org.rut.util.algorithm.support.MergeSort; SuHv{u45
import org.rut.util.algorithm.support.QuickSort; s|1BqoE
import org.rut.util.algorithm.support.SelectionSort; k$hNibpkt
import org.rut.util.algorithm.support.ShellSort; ;{Sgv^A
e0#/3$\aSV
/** p=U/l#xO
* @author treeroot VS:UVe
* @since 2006-2-2 cVR3_e{&H
* @version 1.0 OEkx}.w
*/ aC&ZV}8of
public class SortUtil { l/JE}Eg(
public final static int INSERT = 1; zMXlLRC0
public final static int BUBBLE = 2; :IZ(9=hs
public final static int SELECTION = 3; ?rD`'B
public final static int SHELL = 4; \:*<En0
public final static int QUICK = 5; jmAQ!y|W.
public final static int IMPROVED_QUICK = 6; 0V:DeX$bZ
public final static int MERGE = 7; wK7wu.
public final static int IMPROVED_MERGE = 8; :jFKTG
public final static int HEAP = 9; !"dbK'jb^
~[CtsCiQ
public static void sort(int[] data) { u I \zDR
sort(data, IMPROVED_QUICK); ||lI_B
} g]z[!&%Ahs
private static String[] name={ iZVMDJ?(Z]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U~mv1V^.
}; _V9 O,"DDc
tkG0xRH
private static Sort[] impl=new Sort[]{ bs%lMa.o
new InsertSort(), CXQPbt[5
new BubbleSort(), 4@wH4H8
new SelectionSort(), F=29"1 ._
new ShellSort(), *hT1_
new QuickSort(), u7e g:0Y
new ImprovedQuickSort(), e*Gm()Vu,
new MergeSort(), e$E~@{[1)
new ImprovedMergeSort(), t ._PS3
new HeapSort() M@>EZ
}; btfjmR<Tp
ohdWEU,
public static String toString(int algorithm){ 86^xq#+Uw
return name[algorithm-1]; fC2
} Qe!Q $
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public static void sort(int[] data, int algorithm) { da[u@eNrnX
impl[algorithm-1].sort(data); :\*<EIk(
} ,6zH;fi
y=H^U.
public static interface Sort { GnE%C2L-
public void sort(int[] data); R?Dbv'lp>
} ~ E)[!y
2 NgEzY5
public static void swap(int[] data, int i, int j) { LWB"}#vt
int temp = data; G36}4
data = data[j]; 5pBQ~m3
data[j] = temp; <(]e/}
} w>IYrSaa>
} e#YQA