[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; }_9yemP
} vH>s2\V"
int i1=l; )*9,H|2nS
int i2=mid+1; p 8lm1;
for(int cur=l;cur<=r;cur++){ .;%`I
if(i1==mid+1) O+ J0X*&x
data[cur]=temp[i2++]; /*m6-DC
else if(i2>r) fI-f Gx
data[cur]=temp[i1++]; Eyg F,>.4
else if(temp[i1] data[cur]=temp[i1++]; C&RZdh,$
else pw=o}-P{
data[cur]=temp[i2++]; /3qKsv#
} \&^U9=uq
} p)*x7~3e
ic?(`6N8
} U/>l>J5
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改进后的归并排序: kC/An@J^#
3F{R$M}
package org.rut.util.algorithm.support; MZdj!(hO
wo\O0?d3{
import org.rut.util.algorithm.SortUtil; Xrzpn&Y=#
D]+@pKb
/** rVDOco+w
* @author treeroot dp*E#XCr1
* @since 2006-2-2 6MelN^\[7
* @version 1.0 F|?}r3{aJ
*/ C$`^(?iO/
public class ImprovedMergeSort implements SortUtil.Sort { P+Sgbtc
w9CX5Fg
private static final int THRESHOLD = 10; H8qWY"<Vd
)Xice=x9
/* 'LG )78sk
* (non-Javadoc) ;!#IRR
* X-cP'"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) smqUFo
*/ ?fNUmk^A<
public void sort(int[] data) { L#`X;:
int[] temp=new int[data.length]; ,o [FUi(#@
mergeSort(data,temp,0,data.length-1); dG}*M25
} ]|B_3*A
8,]wOxwqi
private void mergeSort(int[] data, int[] temp, int l, int r) { 9oj0X>| 1
int i, j, k; nSq$,tk(
int mid = (l + r) / 2; Bh()?{q
if (l == r) !r9~K^EI
return; 3tCT"UvTD
if ((mid - l) >= THRESHOLD) y+$a}=cb0
mergeSort(data, temp, l, mid); Ba9"IXKH
else }C5Fvy6uz
insertSort(data, l, mid - l + 1); P&AaD!Qn
if ((r - mid) > THRESHOLD) j`_tb
mergeSort(data, temp, mid + 1, r); pzxlh(a9
else ,A>cL#Oe
insertSort(data, mid + 1, r - mid); ``Rg0o
^2"w5F
for (i = l; i <= mid; i++) { %WtF\p
temp = data; x=V3_HI/}
} >*]B4Q
for (j = 1; j <= r - mid; j++) { P$"s*otr
temp[r - j + 1] = data[j + mid]; &IkHP/
} .Iv`B:4
int a = temp[l]; s,7OoLE
int b = temp[r]; )?k~E=&o
for (i = l, j = r, k = l; k <= r; k++) { h`Xl~=
if (a < b) { xhncQhf\
data[k] = temp[i++]; Hh &s.ja
a = temp; L^L.;1
} else { >,nK
data[k] = temp[j--]; cEEnR1
b = temp[j]; F& ['w-n%
} /5Xt<7vm8
} %TzdpQp"
} {/!Yavx
)9kp[hY
/** cxnEcX\
* @param data &8hW~G>(m
* @param l k j&hn
* @param i @Pf['BF"
*/ aa\?k\h'7X
private void insertSort(int[] data, int start, int len) { CjLiLB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [B%:!Q)@
} {N@tJ,Fh{
} D1cnf"y^
} *.+N?%sAP)
} jgT *=/GH2
#x(3>}
堆排序： ]9hhAT44
/rv=mlpRL
package org.rut.util.algorithm.support; >S:+&VN`M
RHuc#b0
import org.rut.util.algorithm.SortUtil; Enqs|fkbN
#6nuiSF
/** }Hb_8P
* @author treeroot sDyt3xN
* @since 2006-2-2 57:27d0y
* @version 1.0 T$tO[QR/
*/ *TYOsD**9
public class HeapSort implements SortUtil.Sort{ gHVD,Jr
_j|U>s
/* (non-Javadoc) HvW6=d(#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '.#3h$d
*/ b%e7rY2
public void sort(int[] data) { MG74,D.f
MaxHeap h=new MaxHeap(); T@Th?
h.init(data); BU=Ta$#BZ
for(int i=0;i h.remove(); u$+nl~p[&
System.arraycopy(h.queue,1,data,0,data.length); ?wMS[Kj
} )7a 4yTg!~
mlbSs_LT^
private static class MaxHeap{ d&%}u1 .
G_6!w//
void init(int[] data){ #=I5_u
this.queue=new int[data.length+1]; u7bji>j
for(int i=0;i queue[++size]=data; nLnzl
fixUp(size); '#CYw=S+
} oNRp
} &p.7SPQ8/
)Z63 cr/
private int size=0; els71t -
DcEGIaW
private int[] queue; ivPX_#QI
_6C,w`[[6
public int get() { T_~xDQ`v
return queue[1]; CMHg]la
} p\r V6+
@<44wMp
public void remove() { Z^GXKOeq
SortUtil.swap(queue,1,size--); h($Jo
fixDown(1); {D4N=#tl
} / 2h6
file://fixdown L$=a,$
private void fixDown(int k) { l#|M.V6G
int j; &F|Wk,y
while ((j = k << 1) <= size) { qQCds}<w
if (j < size %26amp;%26amp; queue[j] j++; Z/b,aZhB
if (queue[k]>queue[j]) file://不用交换 2G}@s.iE
break; ?,FL"ye
SortUtil.swap(queue,j,k); }Z% j=c"d
k = j; LgA>,.
} AI3\eH+
} nLBi}T
private void fixUp(int k) { !9EbG
while (k > 1) { PpR eqmo
int j = k >> 1; pcPRkYT[M
if (queue[j]>queue[k]) Is}?:ET
break; RH&}'4JE:
SortUtil.swap(queue,j,k); QHe:
k = j; Y,d|b V*FH
} CpC6vA.R
} I9kBe}g3
a>Xq
} KZwzQ"Hl
yb'v*B]
} RBOhV/f
kk+:y{0V
SortUtil： ph@2[rUp
5z9'~Gfb
package org.rut.util.algorithm; txy'7t
_OR[RGy
import org.rut.util.algorithm.support.BubbleSort; 09Y:(2Qri
import org.rut.util.algorithm.support.HeapSort; $ Bdxu
import org.rut.util.algorithm.support.ImprovedMergeSort; a`S3v
import org.rut.util.algorithm.support.ImprovedQuickSort; _Uup*#m
import org.rut.util.algorithm.support.InsertSort; >I9|N}I
import org.rut.util.algorithm.support.MergeSort; 2Q[q)u
import org.rut.util.algorithm.support.QuickSort; `}*jjnr"
import org.rut.util.algorithm.support.SelectionSort; vjYG>YhV
import org.rut.util.algorithm.support.ShellSort; 8rSu,&<
H^8t/h
/** |p":s3K"Hy
* @author treeroot ]d,#PF
* @since 2006-2-2 R!7a;J}
* @version 1.0 pOIfKd
*/ 8:}$L)[V
public class SortUtil { 3vF-SgCV
public final static int INSERT = 1; " {Nw K
public final static int BUBBLE = 2; S{qn^\0
public final static int SELECTION = 3; "gq_^&
public final static int SHELL = 4; qN6GLx%
public final static int QUICK = 5; Oa-~}hN
public final static int IMPROVED_QUICK = 6; lK #~lC
public final static int MERGE = 7; 2%t!3F:
public final static int IMPROVED_MERGE = 8; vmT6^G
public final static int HEAP = 9; 2Jn?'76`
a|@1RH>7H
public static void sort(int[] data) { LrnE6U9
sort(data, IMPROVED_QUICK); Dlo4Wy
} p0j-$*F
private static String[] name={ DP4l %2m0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0/?=FM>
}; k{pn~)xg
nokMS
private static Sort[] impl=new Sort[]{ %{^kmlO
new InsertSort(), 0vdnM8N2
new BubbleSort(), *Y- rEF>
new SelectionSort(), gBXJ/BW$y
new ShellSort(), '2c4 4F)i
new QuickSort(), w}Xy;0c
new ImprovedQuickSort(), O<6!?1|KP
new MergeSort(), Xc7Qu?}
new ImprovedMergeSort(), p|R]/C0f
new HeapSort() Rj{D#5
}; QD*(wj
-vBk,;^>
public static String toString(int algorithm){ ({p@Ay
return name[algorithm-1]; Op:7EdT#
} ($:JI3e[;
=/F\_/Xw
public static void sort(int[] data, int algorithm) { S[oRq
impl[algorithm-1].sort(data); xm}`6B^f
} QzA/HP a
|Xa|%f
public static interface Sort { K6z-brvw"
public void sort(int[] data); VWcR@/3
} 1F }mlyS
E9n7P'8
public static void swap(int[] data, int i, int j) { %#b+ =J
int temp = data; Xu&4|$wB+
data = data[j]; MA5BTq<&
data[j] = temp; ?3Dsz
} vCtag]H2@
} 6d|%8.q1