[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; $}@ll^
} B=7L+6
int i1=l; v.MWO]L
int i2=mid+1; V'B 6C#jT
for(int cur=l;cur<=r;cur++){ $6N.ykJ
if(i1==mid+1) +]X^bB[
data[cur]=temp[i2++]; p*Cbe\
else if(i2>r) x,+zw9
data[cur]=temp[i1++]; P%c<0y"O:>
else if(temp[i1] data[cur]=temp[i1++]; eJ'ojc3
else p5\b&~ g
data[cur]=temp[i2++]; NbdaP{{
} p|%)uA3'/
} JT+P>\\];'
{<lV=0]
} 5ym =2U
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改进后的归并排序: ?QgWW
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package org.rut.util.algorithm.support; :BS`Q/<w
7@\iBmr6
import org.rut.util.algorithm.SortUtil; ,aeFEsi
q!n|Ju<
/** 4{V=X3,x
* @author treeroot <Ip}uy[Y
* @since 2006-2-2 j,Y=GjfGM
* @version 1.0 W$W7U|Z9y+
*/ tF4"28"h
public class ImprovedMergeSort implements SortUtil.Sort { )u$A!+fo
N.]8qzW
private static final int THRESHOLD = 10; =B\?(
ZHT.+X:_
/* xAI<<[-
* (non-Javadoc) <}evOw2
* /T?['#:r-)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kF?\p`[a
*/ UU_k"D~
public void sort(int[] data) { lPH]fWt<
int[] temp=new int[data.length]; *m2:iChY
mergeSort(data,temp,0,data.length-1); I?=Q *og
} @S{,g;8
2neiUNT
private void mergeSort(int[] data, int[] temp, int l, int r) { xGqZ8v`v
int i, j, k; Lt)t}0
int mid = (l + r) / 2; +Fk.B@KT,
if (l == r) 0R.@\?bhL
return; : v]< h
if ((mid - l) >= THRESHOLD) IzG7!K
mergeSort(data, temp, l, mid); z;-2xD0&U[
else P_9O8"W
insertSort(data, l, mid - l + 1); JSM{|HJxh
if ((r - mid) > THRESHOLD) ^vzNs>eJ
mergeSort(data, temp, mid + 1, r); ;fuy}q8@7
else hod|o1C&
insertSort(data, mid + 1, r - mid); #8'%CUF*<8
[mhY_Hmz]
for (i = l; i <= mid; i++) { -C\m'T,1
temp = data; Fw|5A"9'a'
} iS"rMgq
for (j = 1; j <= r - mid; j++) { x`$4
temp[r - j + 1] = data[j + mid]; U7OW)tUf
} :)+cI?\#
int a = temp[l]; Tsa&R:SE
int b = temp[r]; 9s}--_k?F2
for (i = l, j = r, k = l; k <= r; k++) { 5)}xqE"x
if (a < b) { :Z<-J`
data[k] = temp[i++]; jYU#] |k~
a = temp; ]p~XTZgW
} else { _vad>-=D*U
data[k] = temp[j--]; A2xORG&FD
b = temp[j]; 18Ty)7r'
} $ _ gMJ\{
} $]O\Ryf6
} :g Ze>
Ih.o;8PpK
/** Ji=E 1R
* @param data %;gD_H4mm
* @param l R\iU)QP
* @param i U!('`TYe
*/ _c[t.\-`]
private void insertSort(int[] data, int start, int len) { ZI1[jM{4^F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fPst<)
} k1X<jC]P
} )+{'p0
} C; ! )<(Vw
} |XeuqZa
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堆排序： 7.]ZD`"Bb
gbF.Q7?$u
package org.rut.util.algorithm.support; 67d0JQTu
-E.EI@"
import org.rut.util.algorithm.SortUtil; AE@*#47
=_,w<
/** J|s4c`=
* @author treeroot gX);/;9mm+
* @since 2006-2-2 tvI~?\Ylj
* @version 1.0 Hf#/o{=~}
*/ {<bByHT!
public class HeapSort implements SortUtil.Sort{ Ix"uk6 h
i2EB.Zlv
/* (non-Javadoc) o#G7gzw)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .x}ImI
*/ Dk:Zeo]+my
public void sort(int[] data) { F`'e/
MaxHeap h=new MaxHeap(); B6,"S5@
h.init(data); 9v^MZ^Y{
for(int i=0;i h.remove(); 0LxA+
System.arraycopy(h.queue,1,data,0,data.length); _uL m!ku
} *2@Ne[dYEF
g!4"3Dtdg
private static class MaxHeap{ yt$V<8a
UA}k"uM
void init(int[] data){ d!!5'/tmS
this.queue=new int[data.length+1]; u"tv6Qp
for(int i=0;i queue[++size]=data; {4UlJ,Z.n
fixUp(size); t5r,3x!E
} un{LwZH
} !f 7CN<
3b1;f)t
private int size=0; |9YY8oT.
p 8,wr )
private int[] queue; 4Wz@^7|V5
i:9f#
public int get() { fi5x0El
return queue[1]; Z=VAjJ;i[
} Igowz7
Z`L-UQJ.
public void remove() { huj 6Ysr
SortUtil.swap(queue,1,size--); HAq
fixDown(1); E$B7E@(U
} [ML%u$-
file://fixdown oBfh1/<<a
private void fixDown(int k) { \-XQo
int j; 1SddZ5
while ((j = k << 1) <= size) { MeD}S@H
if (j < size %26amp;%26amp; queue[j] j++; ?P<8Zw
if (queue[k]>queue[j]) file://不用交换 8UH c,np
break; QU4/hS;Ux
SortUtil.swap(queue,j,k); _wMc7`6F
k = j; %,HuG-L
} 84xA/BRW
} F` /mcyf
private void fixUp(int k) { =og5Mh,
while (k > 1) { x|>N
int j = k >> 1; gIGyY7{(s8
if (queue[j]>queue[k]) ZE+VLV v
break; Ce:2Tw
SortUtil.swap(queue,j,k); U^ bF}4m
k = j; %Vf3r9 z
} -4 ~(*
} TvV_Tz4e
yV;_]_EO
} 60 D0z
$yd "bJK
} 74Fv9
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SortUtil： JHF<vyt5<
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package org.rut.util.algorithm; *V@>E2@
]: VR3e"H
import org.rut.util.algorithm.support.BubbleSort; mMp(
import org.rut.util.algorithm.support.HeapSort; A1VbqA
import org.rut.util.algorithm.support.ImprovedMergeSort; l/(|rl#6
import org.rut.util.algorithm.support.ImprovedQuickSort; M1{ru~Z9
import org.rut.util.algorithm.support.InsertSort; {51<EvyE*
import org.rut.util.algorithm.support.MergeSort; O[9>^y\,
import org.rut.util.algorithm.support.QuickSort; |=R@nn
import org.rut.util.algorithm.support.SelectionSort; x4b.^5"`:
import org.rut.util.algorithm.support.ShellSort; (jR7D"I
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/** --t"X<.z
* @author treeroot ccUI\!TD{/
* @since 2006-2-2 Y9YE:s
* @version 1.0 3>Ne_kY
*/ h'Gs$o7#P
public class SortUtil { >!o||Yn
public final static int INSERT = 1; CN7 2 E
public final static int BUBBLE = 2; KwEyMR!
public final static int SELECTION = 3; yeI((2L@E2
public final static int SHELL = 4; Qn=#KS8=J
public final static int QUICK = 5; R^[b I;
public final static int IMPROVED_QUICK = 6; [(*ObvEF
public final static int MERGE = 7; L[Z SgRTu
public final static int IMPROVED_MERGE = 8; y `)oD0)Fj
public final static int HEAP = 9; >bgx o<
#Uc0W
public static void sort(int[] data) { BWtGeaW/sr
sort(data, IMPROVED_QUICK); bSK> p3
} %Z:07|57I[
private static String[] name={ S,Y\ox-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `5J`<BPs
}; R 4= ~
Z@Tb3N/[
private static Sort[] impl=new Sort[]{ p#k>BHgnF
new InsertSort(), gb_r <j:w
new BubbleSort(), #2dd`F8
new SelectionSort(), UW!*=?h
new ShellSort(), lWiC$
new QuickSort(), &CtWWKS"
new ImprovedQuickSort(), z}772hMB
new MergeSort(), U};~ff+
new ImprovedMergeSort(), Bu%TTbnz_G
new HeapSort() /'yi!:FZFC
}; @<n8?"{5S
*hm;C+<~
public static String toString(int algorithm){ .>/Tc
return name[algorithm-1]; aPELAU-
} ceKR?%8s
5eP0W#
public static void sort(int[] data, int algorithm) { [/P}1 c[)U
impl[algorithm-1].sort(data); 3U.?Jbm-8
} tTX@Bb8
[,@gSb|D?
public static interface Sort { Ym]Dlz,o
public void sort(int[] data); e*nT+Rp
} .u<i<S
F9N/_H*+
public static void swap(int[] data, int i, int j) { Cp`>dtCd
int temp = data; Q!%C:b
data = data[j]; {c#{dT
data[j] = temp; z_gjC%(y
} Zze(Ik
} <Z0N)0|