[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; b3VS\[p
} $r3i2N-I
int i1=l; ^53r/V}%
int i2=mid+1; t N2Md}@e
for(int cur=l;cur<=r;cur++){ >i6yl5s
if(i1==mid+1) y.Z?LCd<
data[cur]=temp[i2++]; 1u9LdkhnY
else if(i2>r) Tq~=TSD
data[cur]=temp[i1++]; ny54XjtG,
else if(temp[i1] data[cur]=temp[i1++]; 2j&AiD
else YSe.t_K2C
data[cur]=temp[i2++]; S)/_muP
} )=etG
} P$-X)c$&
%Ijj=wW
} VzKW:St
_:VB}>
改进后的归并排序: 2TA*m{\Hr
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package org.rut.util.algorithm.support; eET}r24
>MvDVPi~+
import org.rut.util.algorithm.SortUtil; Dmu/RD5X:
*~x/=.}
/** 0/oyf]HR
* @author treeroot 9,"L^W8"k
* @since 2006-2-2 ,11H.E Z
* @version 1.0 *C:|X b<9
*/ Y(cGk#0
public class ImprovedMergeSort implements SortUtil.Sort { W}]%X4<#rN
NSDv;|f
private static final int THRESHOLD = 10; ?%y?rk <
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/* b 'pOJS
* (non-Javadoc) J>bJ 449B
* UCClWr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z LD}a:s
*/ dB5b@9*
public void sort(int[] data) { 1{r)L{]
int[] temp=new int[data.length]; }7.PH'.8
mergeSort(data,temp,0,data.length-1); ;y2/-tL?
} d:U9pC$
B[4KX
private void mergeSort(int[] data, int[] temp, int l, int r) { `WH"%V:"Q
int i, j, k; .8G@%p{,
int mid = (l + r) / 2; ,5*eX
if (l == r) %$Aqle[
return; heK7pH7;d
if ((mid - l) >= THRESHOLD) bG(3^"dS
mergeSort(data, temp, l, mid); AlIpsJ[UU
else a0ObBe'
insertSort(data, l, mid - l + 1); ;{"+g)u
if ((r - mid) > THRESHOLD) 81i655!Z
mergeSort(data, temp, mid + 1, r); =HlQ36;*
else w2'f/
insertSort(data, mid + 1, r - mid); pn5Q5xc
K]0JC/R6(@
for (i = l; i <= mid; i++) { W0]gLw9*
temp = data; qDfd.gL
} [F6U+1n8e
for (j = 1; j <= r - mid; j++) { /Dj=iBO
temp[r - j + 1] = data[j + mid]; 8!Ww J Oe
} k|H:
int a = temp[l]; 9c6gkt9eB
int b = temp[r]; #Q`dku%V:
for (i = l, j = r, k = l; k <= r; k++) { ]f({`&K5
if (a < b) { 0ok-IHE<
data[k] = temp[i++]; z=3\Ab
a = temp; -xA2pYz"
} else { u!W0P6
data[k] = temp[j--]; M%kO7>h8
b = temp[j]; A"rfZ`
} LpqO{#ZG
} l|k`YC x
} z\%Ls
_c_[C*T]
/** x}8yXE"
* @param data F ;2w1S^
* @param l cj'}4(
* @param i ]n~ilS.rkl
*/ ~"kb7Fxp
private void insertSort(int[] data, int start, int len) { 7*Ej. HK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *5^Q7``
} YS*9t Q{
} 3 C<L
} Y/ .Z.FD`
} F6{bjv2A
-K3^BZHI
堆排序： |* ;B
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package org.rut.util.algorithm.support; cLsV`@J(k
@8ppEFw
import org.rut.util.algorithm.SortUtil; 70Wggty
?1K#dC52#
/** 2-Ej4I~
* @author treeroot VYk!k3qS
* @since 2006-2-2 jGpN,/VQa
* @version 1.0 U_n9]Z
*/ .jk@IL
public class HeapSort implements SortUtil.Sort{ }%_ b$
\}"$ ?d'f
/* (non-Javadoc) 9|gr0&#~j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )6D,d5<
*/ UZJCvfi
public void sort(int[] data) { /! "|_W|n
MaxHeap h=new MaxHeap(); 0,89H4
h.init(data); Xy$3VU*
for(int i=0;i h.remove(); m;GbLncA
System.arraycopy(h.queue,1,data,0,data.length); z;|A(*Y
} `</ff+Q6
SfaQvstN
private static class MaxHeap{ $4 S@
F.=2u"[*&
void init(int[] data){ C8V/UbA /
this.queue=new int[data.length+1]; q$B>|y U
for(int i=0;i queue[++size]=data; EkjN{$*
fixUp(size); O\"3J(y,
} 4hTMbS_;
} C,ARXW1
HiR[(5vnf
private int size=0; {^7Hgg
5BlR1*
private int[] queue; uP~@U"!
Vt".%d/`7
public int get() { +~mA}psr
return queue[1]; /2=#t-p+
} ,P70Jb
{ + Zd*)M[
public void remove() { Pa V@aM~3
SortUtil.swap(queue,1,size--); `\#B18eU
fixDown(1); `OXpU,Z 6U
} B1>/5hV}
file://fixdown 8TLgNQP
private void fixDown(int k) { z6jc8Z=O
int j; (nlvl?\d
while ((j = k << 1) <= size) { XF;ES3 d
if (j < size %26amp;%26amp; queue[j] j++; Of[XKFn_
if (queue[k]>queue[j]) file://不用交换 3TY5;6
break; l0PZ`m+;j
SortUtil.swap(queue,j,k); ;h*K}U
k = j; `Nb[G)Xh
} XkXHGDEf1
} SEGri#s
private void fixUp(int k) { @,cowar*
while (k > 1) { ,D]QxbwZ
int j = k >> 1; `lO[x.[
if (queue[j]>queue[k]) kT"Kyd
break; +'I+o5*
SortUtil.swap(queue,j,k); 3L_\`Ia9
k = j; GzI yP(U
} {MCi<7j<?
} #xQr<p$L6
iS WU'K
} R3;Tk^5A
DRp~jW(\y
} smRE!f*q
clL2k8VS
SortUtil： qB0E_y)a
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package org.rut.util.algorithm; J;{N72
]|zp0d=&o
import org.rut.util.algorithm.support.BubbleSort; QxVq^H
import org.rut.util.algorithm.support.HeapSort; G MX?
import org.rut.util.algorithm.support.ImprovedMergeSort; $c:ynjL|P-
import org.rut.util.algorithm.support.ImprovedQuickSort; Vzdh8)Mu\
import org.rut.util.algorithm.support.InsertSort; #Ssx!+q?
import org.rut.util.algorithm.support.MergeSort; mpuq 9)6
import org.rut.util.algorithm.support.QuickSort; YaKeq5%y
import org.rut.util.algorithm.support.SelectionSort; MGR!Z@1y
import org.rut.util.algorithm.support.ShellSort; .!$*:4ok
s;S?;(QI
/** XWS%zLaK
* @author treeroot j/r]wd"aUS
* @since 2006-2-2 r? NznNVU
* @version 1.0 #\.,?A}9
*/ ]B%v+uaW
public class SortUtil { _wkVwPr
public final static int INSERT = 1; |)b6>.^
public final static int BUBBLE = 2; H%UL%l$
public final static int SELECTION = 3; J'SZ
public final static int SHELL = 4; Q<^Tl(`/N?
public final static int QUICK = 5; ^;Y|3)vvB
public final static int IMPROVED_QUICK = 6; U(Nu%
public final static int MERGE = 7; xLNtIzx
public final static int IMPROVED_MERGE = 8; / ';0H_
public final static int HEAP = 9; KxYwJ
h|VeG3H
public static void sort(int[] data) { \>:CvTzF
sort(data, IMPROVED_QUICK); 5!DBmAB
} 8\^}~s$$A
private static String[] name={ %k-3?%&8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;aI[=?<x
}; /'].lp
~$:|VHl
private static Sort[] impl=new Sort[]{ Ne8Cgp
new InsertSort(), iYORu3
new BubbleSort(), -+ SF
new SelectionSort(), q|o}+Vr
new ShellSort(), kzn5M&f>
new QuickSort(), qq) rd
new ImprovedQuickSort(), T (OW
new MergeSort(), Sp@^XmX(S
new ImprovedMergeSort(), -fwoTGlX
new HeapSort() {QcLu"?c
}; -8eoNzut
x(hE3S#+
public static String toString(int algorithm){ _/uFsYC
return name[algorithm-1]; 5R'TcWf#W
} NO|KVZ~
//T>G_1
public static void sort(int[] data, int algorithm) { TH; R
impl[algorithm-1].sort(data); ??PC k1X
} Izhee%c
^B(V4-|
public static interface Sort { Ge-CY
public void sort(int[] data); <(-= 'QA
} U*(izD
:`-,Lbg
public static void swap(int[] data, int i, int j) { CN#+U,NZV
int temp = data; xIxn"^'
data = data[j]; Xf02"PXC
data[j] = temp; ^* J2'X38I
} fBRo_CU8!
} XWA:J^