[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; p- 5)J&
} .C^1.)
int i1=l; .G[y^w)w}
int i2=mid+1; n8(B%KF
for(int cur=l;cur<=r;cur++){ |8I #`
if(i1==mid+1) (Wkli:Lq
data[cur]=temp[i2++]; d,=Kv
else if(i2>r) ?DcRD)X
data[cur]=temp[i1++]; bc}X.IC
else if(temp[i1] data[cur]=temp[i1++]; {MmHR
else +|.}oL^}G
data[cur]=temp[i2++]; "|W .o=R
} 3L/qU^`
} [?)=3Pp
[% chN/
} 4 -)'a} O
HZMs],GX
改进后的归并排序: u#5/s8
SQ#6~zxl
package org.rut.util.algorithm.support; $q*kD#;mh
qh Ezv~
import org.rut.util.algorithm.SortUtil; U$a Eby.
iO=xx|d
/** }HS:3Dt
* @author treeroot yu"Ii-9z
* @since 2006-2-2 r})2-3ZA9
* @version 1.0 f])?Gw
*/ kTQ:k }%B
public class ImprovedMergeSort implements SortUtil.Sort { 0 eZfHW&
"cjZ6^Hum
private static final int THRESHOLD = 10; ToNi<~
zM6yUEg
/* Z:f0>
* (non-Javadoc) ja$>>5<q
* xO'I*)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !- f>*|@
*/ 7SzY0})<U
public void sort(int[] data) { .lu:S;JSnS
int[] temp=new int[data.length]; Cus=UzL
mergeSort(data,temp,0,data.length-1); *ggTTHy
} /uI/8>p(
{frEVHw
private void mergeSort(int[] data, int[] temp, int l, int r) { ^)N[x''a
int i, j, k; 20m6-rkI<}
int mid = (l + r) / 2; Fk D
if (l == r) Qu]0BVIe
return; "_+X#P x
if ((mid - l) >= THRESHOLD) "M6a_rZ2W
mergeSort(data, temp, l, mid); TI}H(XL(
else x( w <U1
insertSort(data, l, mid - l + 1); ub6\m=Y7
if ((r - mid) > THRESHOLD) 1=#r$H
mergeSort(data, temp, mid + 1, r); Z_' %'&Y
else !mBsDn(J
insertSort(data, mid + 1, r - mid); L1BpkB
}7hpx!s,
for (i = l; i <= mid; i++) { Ary$,3X2
temp = data; Wy#`*h,
} 9CJUOB>]
for (j = 1; j <= r - mid; j++) { DjOFfD\MF
temp[r - j + 1] = data[j + mid]; [2w3c4K
} Js+d4``W
int a = temp[l]; 0vG}c5;F
int b = temp[r]; 4W9!_:j(j
for (i = l, j = r, k = l; k <= r; k++) { yG&kP:k<
if (a < b) { q^sMJ
data[k] = temp[i++]; 7tAWPSwf
a = temp; x+B~t4A
} else { *B}vYX
data[k] = temp[j--]; zq!2);,
b = temp[j]; P},S[GaZ
} e"r'z n
} `m<="No
} 'lC"wP&$
R,Zuy(g
/** L:Wy- Z
* @param data 1@)]+* F*z
* @param l dMGu9k~u
* @param i *(?YgV
*/ 5YS`v#+
private void insertSort(int[] data, int start, int len) { `RGZ-Q{_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TG?;o/
} ?;)(O2p
} W<!q>8Xn?
} R5]R pW=G
} P05_\ t
|Q9S$l]
堆排序： `m2F.^qrr
6/4OFvL1
package org.rut.util.algorithm.support; &tMvs<q,
pvmm" f
import org.rut.util.algorithm.SortUtil; ac+7D:X
h(/|`
/** ^|\ *i
* @author treeroot asQ" |]m
* @since 2006-2-2 *qOo,e
* @version 1.0 Fg#*rzA
*/ Yf{s0Z
public class HeapSort implements SortUtil.Sort{ &}T`[ d_Z
u85y;AE,(
/* (non-Javadoc) 8(3vNuyP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NmB0CbB
*/ t9m`K9.\
public void sort(int[] data) { ;/oMH/,U8
MaxHeap h=new MaxHeap(); ybS7uo
h.init(data); 5yA^n6
for(int i=0;i h.remove(); L7D'wf
System.arraycopy(h.queue,1,data,0,data.length); 9,y&?GLP
} yvH:U5%
0eQ5LG?)
private static class MaxHeap{ )3)L
%J|EDf,M
void init(int[] data){ #v&&GuF
this.queue=new int[data.length+1]; (5yg\3Jvp
for(int i=0;i queue[++size]=data; "r"Y9KODm
fixUp(size); <EBp X
} PI{sO |
} ~7~nU>Vv
m%Ef]({I
private int size=0; 3Ji,n;QLm
;OdUH
private int[] queue; /au\OBUge
vxqMo9T
public int get() { ,%KB\;1mn'
return queue[1]; CS"p[-0
} {Or|] 0
N}dJ)<(2~
public void remove() { Kjf#uU.7
SortUtil.swap(queue,1,size--); ]AHUo;(f%
fixDown(1); Tl=vgs1
} Hy `r}+
file://fixdown e,4!/|H:
private void fixDown(int k) { 55!9U:{
int j; f ~Fus
while ((j = k << 1) <= size) { Vm6^'1CY
if (j < size %26amp;%26amp; queue[j] j++; ikxSWO_Y=
if (queue[k]>queue[j]) file://不用交换 9s7B1Pf
break; c3 wu&*p{
SortUtil.swap(queue,j,k); J@Orrz2q#
k = j; )E4COw+
} w1KQ9H*
} \\/X+4|o'
private void fixUp(int k) { 2XXEg>CU
while (k > 1) { ]7VK&YfN
int j = k >> 1; ?&X6VNbU
if (queue[j]>queue[k]) }F3Z~
break; lhjPS!A~
SortUtil.swap(queue,j,k); ]3I_H+hU
k = j; tjTF?>^6|
} ';lO[B
} ?.Kl/8ml
%2L9kw'
} Tl1?5
'rF TtT
} 1/fvk
G6J3F
SortUtil： +Rh'VZJs
2xnOWW
package org.rut.util.algorithm; UG!&n@R
P;y/`_jo
import org.rut.util.algorithm.support.BubbleSort; ' 5Ieqpm9
import org.rut.util.algorithm.support.HeapSort; pTN_6=Y"
import org.rut.util.algorithm.support.ImprovedMergeSort; w%ip"GT,
import org.rut.util.algorithm.support.ImprovedQuickSort; DBv5Og
import org.rut.util.algorithm.support.InsertSort; z^b\hR
import org.rut.util.algorithm.support.MergeSort; \UC4ai2MK
import org.rut.util.algorithm.support.QuickSort; xz%ig^L
import org.rut.util.algorithm.support.SelectionSort; 4Cfwz-Qo
import org.rut.util.algorithm.support.ShellSort; *PI3L/*
Hv=coS>g:
/** 2MC\~"L<
* @author treeroot lu{}j4
* @since 2006-2-2 _<~05Eh
* @version 1.0 Y9%yjh
*/ RS:0xN\JN
public class SortUtil { 7]^Cg;EtM:
public final static int INSERT = 1; vbFAS:Y:+
public final static int BUBBLE = 2; BNByaC
public final static int SELECTION = 3; ,S8Vfb &
public final static int SHELL = 4; lfKknp#B/O
public final static int QUICK = 5; L"Gi~:z
public final static int IMPROVED_QUICK = 6; ~\/ J&
public final static int MERGE = 7; >YW>=5_
public final static int IMPROVED_MERGE = 8; 2Fh_
public final static int HEAP = 9; sDF J
@Yg7F>s
public static void sort(int[] data) { G'epsD,.bX
sort(data, IMPROVED_QUICK); *p-Fn$7\n
} :Hd<S
private static String[] name={ _E%[D(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nqH^%/7)A@
}; P]TT
tL5Xfd?u
private static Sort[] impl=new Sort[]{ y>OZ<!`
new InsertSort(), JC#@sJ4az)
new BubbleSort(), |Bn=$T]
new SelectionSort(), *Z]| Z4Q/`
new ShellSort(), _(jE](,
new QuickSort(), GBQb({
new ImprovedQuickSort(), lfA BF
new MergeSort(), !69^kIi$
new ImprovedMergeSort(), Y1~SGg7(@
new HeapSort() T/K.'92S
}; sV6A& Aw
^"Y'zIL
public static String toString(int algorithm){ AWi87q
return name[algorithm-1]; Fv: %"P^
} EH3G|3^xz
t2:c@)
public static void sort(int[] data, int algorithm) { PYUY bRn
impl[algorithm-1].sort(data); sHuz10
} D6]$P%t9
@r43F$bcqo
public static interface Sort { 5 QeGx3'
public void sort(int[] data); I Q L~I13
} Rf^cw}jU
b>z.d-
public static void swap(int[] data, int i, int j) { z]YhQIU4n8
int temp = data; OT[m g4&
data = data[j]; L1xD$wl
data[j] = temp; rrWk&;?
} v(h Xk]S
} +m.8*^