[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; sl/=g
} 0A;"V'i
int i1=l; Q6"uK
int i2=mid+1; 'X =p7 d|'
for(int cur=l;cur<=r;cur++){ {<qF}i:V
if(i1==mid+1) o#qH2)tb
data[cur]=temp[i2++]; KH7VR^;mk
else if(i2>r) {?E<](+0
data[cur]=temp[i1++]; v" }WP34
else if(temp[i1] data[cur]=temp[i1++]; AXwaVLEBQ
else B:4Ka]{YO
data[cur]=temp[i2++]; d1v<DU>M
} pb!V|#u"
} hd+]Ok7"
#/Ruz'H1>
} #j;Tb2&w
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改进后的归并排序: -?s&pKi
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package org.rut.util.algorithm.support; w OI^Q~
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import org.rut.util.algorithm.SortUtil; LL&ud_Y
5W/{h q8}}
/** L!t@-5~
* @author treeroot .XXW|{
* @since 2006-2-2 xJ{_qP
* @version 1.0 HPg3`Ul
*/ ,`k_|//}=
public class ImprovedMergeSort implements SortUtil.Sort { E<tK4?i"
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private static final int THRESHOLD = 10; vw2`:]Q+
{( #zcK
/* "#yJHsu]
* (non-Javadoc) jMM$d,7B
* hoa7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JK]R*!{n
*/ ='Q{R*u
public void sort(int[] data) { v2Bzx/F:
int[] temp=new int[data.length]; Z$p0&~
mergeSort(data,temp,0,data.length-1); NYwR2oX
} FmEc`N9\v
j9d!yW
private void mergeSort(int[] data, int[] temp, int l, int r) { xl(@C*.sC1
int i, j, k; [}OgSP9i
int mid = (l + r) / 2; Xa," 'r
if (l == r) )KE[!ofD
return; 5;\gJf
if ((mid - l) >= THRESHOLD) Wy4$*$
mergeSort(data, temp, l, mid); .Obn&S
else CS 8jA\
insertSort(data, l, mid - l + 1); u7fK1 ^O
if ((r - mid) > THRESHOLD) \P;rES'
mergeSort(data, temp, mid + 1, r); (-0ePSOG
else ?-MP_9!JK
insertSort(data, mid + 1, r - mid); ).5RPAP
Fk"Ee&H)(
for (i = l; i <= mid; i++) { 4[yIOs
temp = data; =^&%9X
} PRkSQ4
for (j = 1; j <= r - mid; j++) { Ml?~ |_
temp[r - j + 1] = data[j + mid]; 1TS0X:TCn
} r@U3sO#N
int a = temp[l]; a,|?5j9,P
int b = temp[r]; %' $o"
for (i = l, j = r, k = l; k <= r; k++) { p8}(kHUp(
if (a < b) { zce`\ /:
data[k] = temp[i++]; /ASaB
a = temp; vAb^]d
} else { J-xS:Ha'l
data[k] = temp[j--]; #>[a{<;Kn
b = temp[j]; DC+b=IOz
} m/B6[
} z'7[Tie
} ^Hrn ]
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/** (#D*Pl
* @param data ke_[
* @param l 'sh~,+g
* @param i 2S"Nf8>zp
*/ 5| B(\wqG
private void insertSort(int[] data, int start, int len) { 7ZxaPkIu&%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z[Qza13lo
} vb Y3;+M>
} t?c}L7ht
} 0(U#)
} ,Lpixnm]
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堆排序： mLh kI!4[
j.e0;! (L}
package org.rut.util.algorithm.support; #KxbM-1=
~y HU^5D
import org.rut.util.algorithm.SortUtil; 1Xu?(2;NF
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/** _"@CGXu
* @author treeroot $ _j[2EU
* @since 2006-2-2 \u,}vppz
* @version 1.0 =GlVccc
*/ \Ig68dFf%
public class HeapSort implements SortUtil.Sort{ ?BA]7M(,4
hc#!Lv
/* (non-Javadoc) /X"/ha!=&D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7?j;7.i s(
*/ az0<5Bq)
public void sort(int[] data) { G!w"{Bk?9
MaxHeap h=new MaxHeap(); 2. G=8:l
h.init(data); $YxBE`)d-
for(int i=0;i h.remove(); qgIb/6;xQ
System.arraycopy(h.queue,1,data,0,data.length); 3E3U /K
} C%d_@*82
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private static class MaxHeap{ aj8A8ma*}
ca i<,3H
void init(int[] data){ :Z`:nq.a
this.queue=new int[data.length+1]; PyVC}dUAX
for(int i=0;i queue[++size]=data; \B F*m"lz
fixUp(size); 7tUA>;++
} <q*oV
} !+>v[(OzM
=4V&*go*\
private int size=0; *B`Zq)
:B3[:MpL}
private int[] queue; )?+$x[f!*
<,o>Wx*1C
public int get() { W} WI; cI
return queue[1]; {3;AwhN0H
} !!@A8~H
V7#v6!7A@
public void remove() { GjoIm?
SortUtil.swap(queue,1,size--); !cKz7?w
fixDown(1); )u))n#P
} *I}`dC[
file://fixdown S$KFf=0
private void fixDown(int k) { XE^)VLH:
int j; +]=e;LN$0
while ((j = k << 1) <= size) { J+rCxn?;g
if (j < size %26amp;%26amp; queue[j] j++; *6HTV0jv
if (queue[k]>queue[j]) file://不用交换 SGb;!T*
break; :0Z^uuk`gq
SortUtil.swap(queue,j,k); "KcA
k = j; n>@oBG)!
} }Zl&]e
} dJ$"l|$$
private void fixUp(int k) { fXrXV~'8
while (k > 1) { 6'\6OsH
int j = k >> 1; }VDqj}is
if (queue[j]>queue[k]) I*9e]m"
break; {U&.D [{&
SortUtil.swap(queue,j,k); &-(463
k = j; LYlDc;<A
} P[s8JDqu
} 06jqQ-_`h
*~w[eH!!
} xsWur(>]
a0r"N[&
} pr%nbl
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SortUtil： 2]%h$f+
!i=nSqW
package org.rut.util.algorithm; >0Q|nCx
mPq$?gdp
import org.rut.util.algorithm.support.BubbleSort; [+qCs7'
import org.rut.util.algorithm.support.HeapSort; =8U&[F
import org.rut.util.algorithm.support.ImprovedMergeSort; qI^ /"k*5
import org.rut.util.algorithm.support.ImprovedQuickSort; sz9L8f2
import org.rut.util.algorithm.support.InsertSort; ^eW}XRI
import org.rut.util.algorithm.support.MergeSort; 2<M= L1\
import org.rut.util.algorithm.support.QuickSort; AT5aDEb^^
import org.rut.util.algorithm.support.SelectionSort; R8.CC1Ix
import org.rut.util.algorithm.support.ShellSort; Y@PI {;!
/x3/Ubmz~x
/** qJ0fQI\
* @author treeroot mKYeD%Pm*
* @since 2006-2-2 ve&zcSeb
* @version 1.0 GF3/RT9
*/ g-Pwp[!qkf
public class SortUtil { $s<Ne{?
public final static int INSERT = 1; LM2TZ
public final static int BUBBLE = 2; JEE{QjTh
public final static int SELECTION = 3; 'M3">$N
public final static int SHELL = 4; mrX^2SR
public final static int QUICK = 5; =]k {"?j
public final static int IMPROVED_QUICK = 6; }NsUnbxT
public final static int MERGE = 7; c6Y\n%d&
public final static int IMPROVED_MERGE = 8; .^b;osAU
public final static int HEAP = 9; #A]-ax?Qc}
>[X{LI(_<<
public static void sort(int[] data) { Qt|c1@J
sort(data, IMPROVED_QUICK); jsNF#yE>
} MxBTX4ES
private static String[] name={ t(="h6i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9{:O{nl
}; O:da-xWJ
u ElAnrm
private static Sort[] impl=new Sort[]{ k__$Q9qj(
new InsertSort(), vf8\i-U=
new BubbleSort(), +iI&c s
new SelectionSort(), `9 {mr<
new ShellSort(), IgC}&
new QuickSort(), g[w,!F
new ImprovedQuickSort(), !+:ov'F
new MergeSort(), @^uH`mc
new ImprovedMergeSort(), 2.d|G`
new HeapSort() 5+fLeC;
}; 8/K!SpM*d
&d'Awvy0
public static String toString(int algorithm){ NH0qVQ@A
return name[algorithm-1]; $y b4xU
} +*_5tWAc
3QpYmX<E
public static void sort(int[] data, int algorithm) { . BiCBp<
impl[algorithm-1].sort(data); ]^6c8sgnR
} B<-kzt
Ja ,Cvt
public static interface Sort { JAI)Eqqv]
public void sort(int[] data); HOBP`lf
} d[;.r
"]-Xmdk09
public static void swap(int[] data, int i, int j) { /y>>JxAEb
int temp = data; H)(:8~c,p
data = data[j]; 77Bgl4P
data[j] = temp; mXXt'_"
} E_zIg+(+
} Ka,^OW}<%q