[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; wVc^l
} mrig5{
int i1=l; D[Q/:_2l
int i2=mid+1; ~_wSB[z
for(int cur=l;cur<=r;cur++){ 2AEVBkF;M
if(i1==mid+1) d)d0,fi?-
data[cur]=temp[i2++]; %8xKBL]J
else if(i2>r) ~y,m7%L
data[cur]=temp[i1++]; vx}BTH
else if(temp[i1] data[cur]=temp[i1++]; ClNuO
else @gw8r[
data[cur]=temp[i2++]; vhDtjf/*
} xtK\-[n
} m^w{:\p
kM(m$Oo.
} AHHV\r
P(a}OlG
改进后的归并排序: yq[@Cw
DVDzYR**4
package org.rut.util.algorithm.support; !'B='].
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import org.rut.util.algorithm.SortUtil; .hnq>R\
!7p&n3dz
/** ? 51i0~O=
* @author treeroot ncTMcu
* @since 2006-2-2 Zay%QNsb
* @version 1.0 Z;njSw%:
*/ ls~9qkAyLx
public class ImprovedMergeSort implements SortUtil.Sort { <j3|Mh_(I
/U`p|M;
private static final int THRESHOLD = 10; amQTPNI
^x_$%8
/* Ejnk\8:
* (non-Javadoc) OL_jU2,fv
* U+C^"[B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y?L>KiM$
*/ Ty#sY'%
public void sort(int[] data) { q([{WZ:6Oq
int[] temp=new int[data.length]; &9"Y:),
mergeSort(data,temp,0,data.length-1); Nr).*]g@~
} )uMv]
O%haaL\
private void mergeSort(int[] data, int[] temp, int l, int r) { +cKOIMu9
int i, j, k; %?Q&a ]
int mid = (l + r) / 2; 0Ue~dVrM(?
if (l == r) }D.\2x(J
return; 5:C>:pAV
if ((mid - l) >= THRESHOLD) MSRk|0Mcr
mergeSort(data, temp, l, mid); <lLJf8OK
else ia3!&rZ
insertSort(data, l, mid - l + 1); Zo }^"u
if ((r - mid) > THRESHOLD) ayQeT
mergeSort(data, temp, mid + 1, r); [rL 8L6,!
else H6Bw3I[
insertSort(data, mid + 1, r - mid); 6As%<g=
wNn=JzP
for (i = l; i <= mid; i++) { ;tF&r1
temp = data; +S`cUn7
} e8#83|h
for (j = 1; j <= r - mid; j++) { Uw!d;YQm
temp[r - j + 1] = data[j + mid]; cbs ;
} W/}_y8q
int a = temp[l]; q]VB}nO
int b = temp[r]; @LSh=o+
for (i = l, j = r, k = l; k <= r; k++) { 7#NHPn
if (a < b) { w=a$]`
data[k] = temp[i++]; o)]O
a = temp; 9*huO#
} else { w7&.Uqjf
data[k] = temp[j--]; MvnQUZ
b = temp[j]; iz{TSU
} V|[NL4
} e+D]9wM8
} ByO?qft>u
e-[PuJ
/** ezCJq`b
* @param data D.|r [c
* @param l VJFFH\!`
* @param i Q\T?t
*/ :Fu7T1
private void insertSort(int[] data, int start, int len) { -sZb+2tDa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S~E@A.7
} 4*Gv0#dga
} +6 =lN[b
} 0fn*;f8{XJ
} V*5v JF0j
W$()W)
堆排序： WSN^iDS
[#RFdn<
package org.rut.util.algorithm.support; 0a^bAEP
:#35mBe}k
import org.rut.util.algorithm.SortUtil; \E<Qi3W>*
VJT /9O)Z|
/** sQ,xTWdj
* @author treeroot 1 ] cLbJ
* @since 2006-2-2 c@"FV,L>
* @version 1.0 hliO/3g
*/ HGh -rEh
public class HeapSort implements SortUtil.Sort{ 6M_:D
>]ZE<.
/* (non-Javadoc) V$O6m|q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @ =~k[o
*/ 1K<}
public void sort(int[] data) { }LKD9U5;8
MaxHeap h=new MaxHeap(); h6^|f%\w*i
h.init(data); i*m;kWu,
for(int i=0;i h.remove(); ~:o$}`mW
System.arraycopy(h.queue,1,data,0,data.length); OKK Ko`RN
} cz/cY:o)
doHE]gC2Uz
private static class MaxHeap{ [fV"tf;
]1Wxa?
void init(int[] data){ OuEcoIK
this.queue=new int[data.length+1]; Rvx7}ZL!
for(int i=0;i queue[++size]=data; /|i*'6*
fixUp(size); 3Il._]#
} |N% l at
} O6)Po
*AQ3RA8
private int size=0; ~%g,Uypi
/.CS6W^z
private int[] queue; 6QbDU[
G'#u!<(^h
public int get() { 1Q!^*D
return queue[1]; a^@.C5
} ~ZSX84~@u
buN@O7\
public void remove() { 2w8cJadT'p
SortUtil.swap(queue,1,size--); w9VwZow
fixDown(1); M!Ao!D[
} U&u6356
file://fixdown :i?6#_2IC
private void fixDown(int k) { 3~Fag1Hp
int j; :??W3ROn
while ((j = k << 1) <= size) { `4'=&c9
if (j < size %26amp;%26amp; queue[j] j++; P(b[|QF
if (queue[k]>queue[j]) file://不用交换 /KF@Un_Ow
break; "``>ii
SortUtil.swap(queue,j,k); E>tHKNyVTp
k = j; }*QK;#NEc
} 9?O8j1F
} QY&c=bWAX"
private void fixUp(int k) { !37I2*+4
while (k > 1) { 7`t"fS
int j = k >> 1; E~fb#6
if (queue[j]>queue[k]) 3mAizq3
break; I8)D
SortUtil.swap(queue,j,k); ' *a}*(0OA
k = j; L{&2 P
} 6P717[
} J QnaXjW2
1_q!E~)
} -i{_$G8W/c
b)KEB9w
} UH%H9; ,$]
e( @</W
SortUtil： xCXsyZ2h
JFX}))7
package org.rut.util.algorithm; \}=T4w-e
[niFJIsc
import org.rut.util.algorithm.support.BubbleSort; 1q-;+Pd;
import org.rut.util.algorithm.support.HeapSort; \UZGXk
import org.rut.util.algorithm.support.ImprovedMergeSort; Qe_{<E
import org.rut.util.algorithm.support.ImprovedQuickSort; TY %zw6 #p
import org.rut.util.algorithm.support.InsertSort; t*H2;|zn_
import org.rut.util.algorithm.support.MergeSort; ^`id/
import org.rut.util.algorithm.support.QuickSort; <Qih&P9;>
import org.rut.util.algorithm.support.SelectionSort; 9|<Li[
import org.rut.util.algorithm.support.ShellSort; d;l%XZe
?.< Qgd
/** e_Hpai<b
* @author treeroot E7\K{]
* @since 2006-2-2 M KW~rrR
* @version 1.0 )GVTa4}p
*/ 8\P,2RSnt
public class SortUtil { %?].( Lc
public final static int INSERT = 1; [HWVS
public final static int BUBBLE = 2; o"BED!/
public final static int SELECTION = 3; _`;KmD&5
public final static int SHELL = 4; ~8nR3ki
public final static int QUICK = 5; ~%=%5}
public final static int IMPROVED_QUICK = 6; U&])ow):
public final static int MERGE = 7; ohKoX$|p~
public final static int IMPROVED_MERGE = 8; `WL3aI":
public final static int HEAP = 9; <lIm==U<-
WM|G/'q
public static void sort(int[] data) { @H#Fzoo.
sort(data, IMPROVED_QUICK); oH0g>E;
} q1u$Sm
private static String[] name={ q:)PfP+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X:Wd%CHP
}; ZKEoU!
~HGSA(
private static Sort[] impl=new Sort[]{ bi+M28m
new InsertSort(), O DN_i
new BubbleSort(), ^$'z#ZN1
new SelectionSort(), RRS)7fFm
new ShellSort(), cKkH*0B5
new QuickSort(), ._tEDY/1m
new ImprovedQuickSort(), yW'{Z]09
new MergeSort(), ),`jMd1`
new ImprovedMergeSort(), %XukiA+
new HeapSort() wg)Bx#>\L:
}; q>'#;QA
MMKN^a"GA
public static String toString(int algorithm){ |g}r
return name[algorithm-1]; iYT?6Y|+
} b`+yNf
t^MTR6y+8
public static void sort(int[] data, int algorithm) { vd#)+
impl[algorithm-1].sort(data); bi}aVtG~z
} p%*s3E1.D
n.9k5r@
public static interface Sort { >2>/ q?
public void sort(int[] data); rWJ5C\R
} x f{`uHa8
LbJf5xdi
public static void swap(int[] data, int i, int j) { Cx~;oWZ
int temp = data; g#74c'+
data = data[j]; t{},Th
data[j] = temp; 8%;Wyqdf]
} d:>^]5cE&
} |X1axRO