[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; WOe{mwhhj
} zz+M1n-;o
int i1=l; 4w?]dDyc%
int i2=mid+1; @ ~0G$
for(int cur=l;cur<=r;cur++){ UpE1PLZlB
if(i1==mid+1) $;KQY7
data[cur]=temp[i2++]; ;%3thm7+
else if(i2>r) ly[\mGr
data[cur]=temp[i1++]; wh7i G8jCz
else if(temp[i1] data[cur]=temp[i1++]; YFC0KU
else ]k3GFPw
data[cur]=temp[i2++]; >F LdI
} 5 O{Ip-
} { c6DT
3.GdKP.%
} `CTkx?e[
]ouUv7\
改进后的归并排序: )edU <1P
xC=3|,U
package org.rut.util.algorithm.support; DLg`Q0`M5
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import org.rut.util.algorithm.SortUtil; uHujw.H/y
a3(7{,Ew
/** "`V"2zZlj
* @author treeroot ^bY^x+d
* @since 2006-2-2 Aspj*CDu
* @version 1.0 0|wKR|zW
*/ 8)ebXc
public class ImprovedMergeSort implements SortUtil.Sort { af`f*{Co3
0qotC6l~_w
private static final int THRESHOLD = 10; _z"ci$[
-?2&5YB
/* X,C/x)
* (non-Javadoc) ><:lUt*N2
* jmA{rD W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cs6zv>SR
*/ >uqS
public void sort(int[] data) { L`VQ{|&3V
int[] temp=new int[data.length]; RfVV(X
mergeSort(data,temp,0,data.length-1); `*2*xDuP
} sWpRX2{5,
k:HSB</}
private void mergeSort(int[] data, int[] temp, int l, int r) { 1_dMe%53
int i, j, k; BW(DaNt^
int mid = (l + r) / 2; :n%sU*'T
if (l == r) ,co9f.(w
return; a_}BTkfHa
if ((mid - l) >= THRESHOLD) T/spUlWu
mergeSort(data, temp, l, mid); D/%b@Ls2ze
else IZ(CRKCGBl
insertSort(data, l, mid - l + 1); 07G*M ]
if ((r - mid) > THRESHOLD) >sl1 cC
mergeSort(data, temp, mid + 1, r); =+sIX3
else 5k7(!
insertSort(data, mid + 1, r - mid); xhVq
JQvQm|\nc
for (i = l; i <= mid; i++) { NXG}0`QVT
temp = data; OrKT~JQVC&
} {bq-: CZe
for (j = 1; j <= r - mid; j++) { j}x O34
temp[r - j + 1] = data[j + mid]; e>i8=U`;
} {1-CfQ0 8
int a = temp[l]; =QxE-)v
int b = temp[r]; +h\W~muR
for (i = l, j = r, k = l; k <= r; k++) { +ouy]b0`t
if (a < b) { '%|20j
data[k] = temp[i++]; tRrY)eElS
a = temp; 5 xzB1n8
} else { piM11W}|/
data[k] = temp[j--]; p6k'Q
b = temp[j]; dxhjPS~^Q
} 1wNY}3
} !kk %;XSZ
} gm%bxr@X~
3lrZ-k+S{
/** >|o9ggL`J5
* @param data 1 0Tg> H
* @param l Gv2./<{#
* @param i PTc\I
*/ G<WDyoN=O
private void insertSort(int[] data, int start, int len) { @W5hrei
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a^)4q\E
} :tS>D5dz(
} zZjLt1
} u g$\&rM>
} Z=5}17kA
YPJx/@Z`
堆排序： sZP3xh[B
hZ/
package org.rut.util.algorithm.support; Tk|;5^#H
.)pRB7O3
import org.rut.util.algorithm.SortUtil; CCvBE, ux
k2,oyUT=S
/** 1NHoIX
* @author treeroot :8!3*C-=
* @since 2006-2-2 E1 gTrMo
* @version 1.0 {3p7`h~
*/ aKFA&Xnsl
public class HeapSort implements SortUtil.Sort{ )LMuxj
#WmAkzvq
/* (non-Javadoc) `m0Uj9)#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t>|N4o
*/ 8&[<pbN)
public void sort(int[] data) { R{y{
MaxHeap h=new MaxHeap(); IqJ=\
h.init(data); $izpH
for(int i=0;i h.remove(); H?bsK~
System.arraycopy(h.queue,1,data,0,data.length); v+_Y72h*a
} )B5gs%u]
<XcMc<h~
private static class MaxHeap{ JhXN8Bq33
]?^xc[
void init(int[] data){ 6)2M/(
this.queue=new int[data.length+1]; )tQ6rd'
for(int i=0;i queue[++size]=data; U.sPFt
fixUp(size); T9v#Jb6
} fy-Z{
} ~5dq5_
jO N}&/
private int size=0; + d)~;I$
]f @LhC1x
private int[] queue; fB"gM2'
nKJ7K8)
public int get() { kITmo"$K
return queue[1]; ITY!=>S-
} Hh=::Bi
~W2&z]xD
public void remove() { >{)#|pWU
SortUtil.swap(queue,1,size--); _N#3lU?
fixDown(1); 8GRrf2
} !*. nR(>d
file://fixdown 0aoHv
private void fixDown(int k) { fU7:3"|s8
int j; }uj'BO2?
while ((j = k << 1) <= size) { d3J_IW+8R$
if (j < size %26amp;%26amp; queue[j] j++; 2*DS_=6o
if (queue[k]>queue[j]) file://不用交换 V~"d`j
break; Z8n%=(He
SortUtil.swap(queue,j,k); W$&Ets8zo
k = j; :q[n1 O[Ch
} r&~iEO|?\
} n\al}KG
private void fixUp(int k) { T eTOj|
while (k > 1) { 9s6lt#?b
int j = k >> 1; [|O6n"'
if (queue[j]>queue[k]) {+mkXp])R
break; \@" . GM%
SortUtil.swap(queue,j,k); eZkz 1j~
k = j; TUYl><F5v=
} [ +@<T)
} Lk+1r8
\I{A33i2w
} BFu9KS+@)
Nmq5Tv
} mzR @P$:36
!+ hgKZ]
SortUtil： vXZz=E AH
Z"KuS
package org.rut.util.algorithm; MpvA--
U4pvQE.m<
import org.rut.util.algorithm.support.BubbleSort; < l ^ Z;.
import org.rut.util.algorithm.support.HeapSort; lq9h Dn[p
import org.rut.util.algorithm.support.ImprovedMergeSort; }H^^v[4
import org.rut.util.algorithm.support.ImprovedQuickSort; ^K[tO54
import org.rut.util.algorithm.support.InsertSort; +6-!o,(
import org.rut.util.algorithm.support.MergeSort; lhODNWi
import org.rut.util.algorithm.support.QuickSort; KA2B3\
import org.rut.util.algorithm.support.SelectionSort; )yAPYC
import org.rut.util.algorithm.support.ShellSort; zXPj7K*
w'>v@`y
/** 5E(P,!-.
* @author treeroot n\DT0E]
* @since 2006-2-2 1k({(\>qq
* @version 1.0 lY?d*qED
*/ [6qP;
public class SortUtil { FJiP>S[]
public final static int INSERT = 1; N Uml"
public final static int BUBBLE = 2; BJrNbo;T
public final static int SELECTION = 3; oIgj)AY<
public final static int SHELL = 4; j"=jK^
public final static int QUICK = 5; m,q<R1
public final static int IMPROVED_QUICK = 6; He23<hd!
public final static int MERGE = 7; Y)RikF >
public final static int IMPROVED_MERGE = 8; .H.v c_/
public final static int HEAP = 9; ^:j:;\;
<p .[E]a2_
public static void sort(int[] data) { g5\B-3{
sort(data, IMPROVED_QUICK); \H12~=p`B
} en":
private static String[] name={ Lj,%pzJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @SB+u+mOS
}; 4w[ta?&6B
A+8b]t_k
private static Sort[] impl=new Sort[]{ ~'mhC46d
new InsertSort(), LvdMx]*SSr
new BubbleSort(), cv1L!Ce,
new SelectionSort(), @>ZjeDG>
new ShellSort(), Jz b".A
new QuickSort(), >f/g:[
new ImprovedQuickSort(), t$|6}BX
new MergeSort(), C[,-1e?
new ImprovedMergeSort(), ?J-KB3Uv3
new HeapSort() %V/]V,w:*R
}; wUndNE
SQx):L)P6
public static String toString(int algorithm){ Z2}b1#U?
return name[algorithm-1]; n\Nl2u& m
} /Qy0vAvJ
np(<Ap r
public static void sort(int[] data, int algorithm) { $ 7!GA9Bn
impl[algorithm-1].sort(data); 5}ah%
} Dh<e9s:
T]`" Xl8
public static interface Sort { SO"P3X
public void sort(int[] data); 1)ne-e
} #Xly5J
iDJ2dM}v
public static void swap(int[] data, int i, int j) { u>Hx#R<*%
int temp = data; X=~QE}x
data = data[j]; #n r1- sf|
data[j] = temp; M$9h)3(B
} Bw[VK7
} r>o6}Mx$