[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; Xlt|nX~#;
} >KKMcTOYY
int i1=l; !1b;F*H
int i2=mid+1; )WFr</z5bA
for(int cur=l;cur<=r;cur++){ uvS)8-o&F
if(i1==mid+1) E<*xx#p
data[cur]=temp[i2++]; S`]k>' l
else if(i2>r) YA5g';$H*
data[cur]=temp[i1++]; [a<SDMR
else if(temp[i1] data[cur]=temp[i1++]; -D~%|).'
else L{Vqh0QD&
data[cur]=temp[i2++]; SZCze"`[
} K"@M,8hb
} Uoix
28u_!f[
} j*m%*_kO
9(<@O%YU
改进后的归并排序: YZJyk:H\
r:TH]hs12+
package org.rut.util.algorithm.support; wwcBsJ1{
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import org.rut.util.algorithm.SortUtil; _h1mF<\ X^
S$XSei_q
/** _GPl gp:
* @author treeroot YKf0dh;O
* @since 2006-2-2 *DhiN
* @version 1.0 }W,[/)MO
*/ UkGCyGyZ[
public class ImprovedMergeSort implements SortUtil.Sort { {BU;$
w@fi{H(R
private static final int THRESHOLD = 10; (&x['IR
.6 ?U@2
/* LjHVJSC
* (non-Javadoc) vY`s'%WV
* Ny)X+2Ae
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C+&l< fM&
*/ Eu04e N
public void sort(int[] data) { seeBS/%
int[] temp=new int[data.length]; ZqO^f*F>h
mergeSort(data,temp,0,data.length-1); 18:%~>.!
} 0+b1vhQ
b5n'=doR/I
private void mergeSort(int[] data, int[] temp, int l, int r) { lsNd_7k
int i, j, k; -d:Jta!}{
int mid = (l + r) / 2; kylVH! @l
if (l == r) @pU)_d!pJ
return; %ULr8)R;
if ((mid - l) >= THRESHOLD) Dv`c<+q(#
mergeSort(data, temp, l, mid); \xoP)Ub>
else 0#^v{DC
insertSort(data, l, mid - l + 1); <1M-Ro?5k
if ((r - mid) > THRESHOLD) ;t`&n['N>
mergeSort(data, temp, mid + 1, r); "g8M0[7e3
else r",GC]
insertSort(data, mid + 1, r - mid); Uf+%W;}
Q&bM\;Ml
for (i = l; i <= mid; i++) { ]e@Oiq
temp = data; Pk)1WK7E
} QP J4~
for (j = 1; j <= r - mid; j++) { \dQNLLg/
temp[r - j + 1] = data[j + mid]; geCM<]
} K",N!koj
int a = temp[l]; r]36zX v
int b = temp[r]; jrh43 \$*
for (i = l, j = r, k = l; k <= r; k++) { v/=}B(TDF
if (a < b) { Ooy7*W';
data[k] = temp[i++]; jo@J}`\Zt
a = temp; jW@Uo=I[
} else { *-p}z@8
data[k] = temp[j--]; Mf``_=K
b = temp[j]; 8)I^ t81
} H$4:lH&(
} h9W^[6
} lnR{jtWP
|ZBI *
/** #Mw8^FST
* @param data #>+HlT
* @param l Y:a]00&)#Y
* @param i AYx{U?0p
*/ )K
private void insertSort(int[] data, int start, int len) { pyvSwD5t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %84rL?S
} h.t-`k7
} E< fVZ,
} \)|hogI|f
} !C:$?oU
|$b}L7_
堆排序： ekCC5P!
J7p),[>I<
package org.rut.util.algorithm.support; [cp+i^f
J/*`7Pd
import org.rut.util.algorithm.SortUtil; M/K5#8Arj
JaGtsi9%.
/** E?0%Z&1h
* @author treeroot | %Vh`HT
* @since 2006-2-2 XOS[No~
* @version 1.0 %bfQ$a:
*/ <UQbt N-B\
public class HeapSort implements SortUtil.Sort{ Dm<A ^u8
n6a`;0f[R
/* (non-Javadoc) kW&TJP+5*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E~oOKQ5W
*/ pIX`MlBdF
public void sort(int[] data) { ?(i{y~
MaxHeap h=new MaxHeap(); emN*l]N
h.init(data); }9fTF:P
for(int i=0;i h.remove(); mL: sJf
System.arraycopy(h.queue,1,data,0,data.length); !Q0w\j h
} oM`0y@QCf
L/G6Fjg^
private static class MaxHeap{ ~IN>3\j
c\ lkD-\
void init(int[] data){ @J`"[%U
this.queue=new int[data.length+1]; Q$@I"V&G.
for(int i=0;i queue[++size]=data; 9zy!Fq
fixUp(size); ZExlGC
} TbW38\>.R
} jtc]>]6i
NHZz _a=
private int size=0; s,&Z=zt0R
JnM["Q=`
private int[] queue; '(|ofJe!
_zi|
public int get() { WEi2=3dV
return queue[1]; 0Z{ZO*rK
} ~FG]wNgS
:X (=z;B;N
public void remove() { G*P#]eO
SortUtil.swap(queue,1,size--); ^3L0w}#
fixDown(1); cHt#us
} |_@>*Vmg
file://fixdown ,1o FPa{?
private void fixDown(int k) { j+ 0I-p
int j; VS8Rx.?
while ((j = k << 1) <= size) { ^,T(mKS
if (j < size %26amp;%26amp; queue[j] j++; }?Ai87-{
if (queue[k]>queue[j]) file://不用交换 j HJ`,#
break; L0WN\|D
SortUtil.swap(queue,j,k); b!5~7Ub.No
k = j; XuM'_FN`A<
} 2!=f hN
} Gu\q%'I
private void fixUp(int k) { 9m~p0ILh
while (k > 1) { *wB1,U{
int j = k >> 1; 4u})+2W
if (queue[j]>queue[k]) n8ZZ#}Nhg
break; q'Tf,a
SortUtil.swap(queue,j,k); ExL0?FemWV
k = j; L>4"(
} +OWX'~fd<
} 'kO!^6=4M
lp%pbx43s
} .jjG(L
~%kkeh\j
} P:MT*ra*,
t=W}SH
SortUtil： mSl.mi(JiZ
Trz@~d/[,n
package org.rut.util.algorithm; ok\vQs(a
Q:d]imw!O
import org.rut.util.algorithm.support.BubbleSort; 0[?Xxk}s0
import org.rut.util.algorithm.support.HeapSort; ?QdWrE_
import org.rut.util.algorithm.support.ImprovedMergeSort; :(*V?WI
import org.rut.util.algorithm.support.ImprovedQuickSort; K:#I
import org.rut.util.algorithm.support.InsertSort; a'yK~;+_9
import org.rut.util.algorithm.support.MergeSort; ML56k~"BL
import org.rut.util.algorithm.support.QuickSort; )W _v:?A9
import org.rut.util.algorithm.support.SelectionSort; 3K0A)W/YEs
import org.rut.util.algorithm.support.ShellSort; OU $#5
ud@%5d
/** y,,dCca
* @author treeroot -ifFbT+x
* @since 2006-2-2 4yA+h2
* @version 1.0 0rs"o-s<
*/ N]=q|D
public class SortUtil { 8\A#CQ5b
public final static int INSERT = 1; ^KT Y?
public final static int BUBBLE = 2; scz&h#0V
public final static int SELECTION = 3; [MM~H0=s
public final static int SHELL = 4; !Pfr,a
public final static int QUICK = 5; 7CURhDdk
public final static int IMPROVED_QUICK = 6; m'=Crei
public final static int MERGE = 7; uGK.\PB$
public final static int IMPROVED_MERGE = 8; a![{M<Y~
public final static int HEAP = 9; ,Ae6/D$h/
ytJ/g/,A0i
public static void sort(int[] data) { xHLlMn4M
sort(data, IMPROVED_QUICK); ShP^A"Do
} .:%0E`E
private static String[] name={ Zaf:fsj>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jZkcBIK2
}; aP@N)"
#rQ2gx4
private static Sort[] impl=new Sort[]{ 2E)-M9ds
new InsertSort(), ,Np0wg0
new BubbleSort(), k|PN0&J
new SelectionSort(), M; tqp8
new ShellSort(), %axh`xK#
new QuickSort(), U}rU~3N
new ImprovedQuickSort(), \aUC(K~o\;
new MergeSort(), V1`o%;j
new ImprovedMergeSort(), RmeD$>7
new HeapSort() yfjWbW
}; ?(F6#"/E
.glA gt
public static String toString(int algorithm){ ;)z:fToh
return name[algorithm-1]; Y0dEH^I
} x,@B(9No
GdxnpE
public static void sort(int[] data, int algorithm) { V]e8a"/[{
impl[algorithm-1].sort(data); $$;M^WV^?.
} s.QwSbw-g
d_E/8R_$L
public static interface Sort { rCbDu&k]
public void sort(int[] data); SaAFz&WRl
} Q}K"24`=
b;W3j
public static void swap(int[] data, int i, int j) { &4x}ppX
int temp = data; 0#s"e}@v
data = data[j]; )|R)Q6UJ
data[j] = temp; t[;LD_
} )9'K($
} 7<#U(,YEA