[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; a~+WL
} zK]%qv]
int i1=l; +vY`?k`
int i2=mid+1; jYssz4)tp
for(int cur=l;cur<=r;cur++){ F_ lj>;}a5
if(i1==mid+1) U8@*I>vA
data[cur]=temp[i2++]; tw^.(m5d
else if(i2>r) A-NC,3
data[cur]=temp[i1++]; \y+F!;IxL
else if(temp[i1] data[cur]=temp[i1++]; BB}iBf I'
else s#CEhb
data[cur]=temp[i2++]; !haXO
} 5|H(N}S_
} t@mw f3,
c;fyUi
} (3HgI
K0bmU(Xxp
改进后的归并排序: ~V)VGGOL$v
mCP +7q7
package org.rut.util.algorithm.support; +(hwe jyC
eh# (}v
import org.rut.util.algorithm.SortUtil; -cC(d$y
olW`.3f
/** _p^ "!
* @author treeroot w\[*_wQp
* @since 2006-2-2 sJ*U Fm{
* @version 1.0 vG=$UUh@~
*/ &Fr68HNmj
public class ImprovedMergeSort implements SortUtil.Sort { PbC>v
}Z%{QJ$z
private static final int THRESHOLD = 10; YV+dUvz
-"b3q
/* )1'_g4
* (non-Javadoc) t,Rn
* Nd!=3W5?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :BiR6>1:
*/ iV$75Atk
public void sort(int[] data) { Cl){sP=8W
int[] temp=new int[data.length]; :re(khZq#
mergeSort(data,temp,0,data.length-1); (B4A$t
} >LZ)<-Mk
"PP0PL^5F
private void mergeSort(int[] data, int[] temp, int l, int r) { hndRgCo
int i, j, k; k:yu2dQh
int mid = (l + r) / 2; S~`AnX3!
if (l == r) mAERZ<I
return; T[II;[EiE
if ((mid - l) >= THRESHOLD) :9< r(22
mergeSort(data, temp, l, mid); P_Ja?)GT
else Tm,L?Jh
insertSort(data, l, mid - l + 1); Q>Q}/{8!
if ((r - mid) > THRESHOLD) "uNxKLDB
mergeSort(data, temp, mid + 1, r); ^qy-el
else _A~gqOe
insertSort(data, mid + 1, r - mid); E^ti!4{<
\?IwR]@y
for (i = l; i <= mid; i++) { g#&##f
temp = data; {N`<e>A]{
} +=xRr?F
for (j = 1; j <= r - mid; j++) { 69w"$Vk
temp[r - j + 1] = data[j + mid]; [wxI X
} ;'+cT.cmH
int a = temp[l]; L*Cf&c`8r
int b = temp[r]; qf{B
for (i = l, j = r, k = l; k <= r; k++) { Z-V%lRQ=b
if (a < b) { LR.+CxQ
data[k] = temp[i++]; u 9TlXn
a = temp; -C]a2
} else { ~#Mx&mZ
data[k] = temp[j--]; U~c;W@T
b = temp[j]; xL"o)]a=
} nlnJJM&J$
} S}I=i>QB
} hS/'b$#
!~kzxY
/** $S("-3
* @param data f@g
* @param l n#,l&Bx
* @param i CplRnKra
*/ CR=MjmH
private void insertSort(int[] data, int start, int len) { \C.@ @4{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &g {_.n,
} W.<<azi
} ~;s)0M
} 00TdX|V`
} 6S&YL
|`/uS;O
堆排序： 8hA=$}y&x
ApBThW*E
package org.rut.util.algorithm.support; ?V)6`St#C
<us{4%
import org.rut.util.algorithm.SortUtil; p+?WhxG)
xo+z[OIlF
/** 1MSu]) W
* @author treeroot G-<~I#k
* @since 2006-2-2 aC` c^'5
* @version 1.0 vRs5-T
*/ m$g^On
public class HeapSort implements SortUtil.Sort{ C_)>VPD
<ZdNPcT<s
/* (non-Javadoc) }aIfIJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c,ek]dTj
*/ O,v$'r W
public void sort(int[] data) { 0&~u0B{
MaxHeap h=new MaxHeap(); >c eU!=>
h.init(data); 3!W&J
for(int i=0;i h.remove(); RkM!BcB
System.arraycopy(h.queue,1,data,0,data.length); bq]a8tSB
} {xH@8T$DX
I-"{m/PEdg
private static class MaxHeap{ n5/Q)*e0'#
Y6a|\K|
void init(int[] data){ J_$~OEC~
this.queue=new int[data.length+1]; bS<p dOX_
for(int i=0;i queue[++size]=data; 0rUf'S ?K
fixUp(size); @9a=D<'>
} s,x]zG"
} A@r,A?(
$Plk4 o*g
private int size=0; !HYqM(|{.
xcA:Q`c.{
private int[] queue; D$;/ l}s?
2D"/k'iA
public int get() { O/nS,Ux
return queue[1]; nt6"}vO
} !NjE5USi
Y}Uw7\e
public void remove() { x ,W+:l9~s
SortUtil.swap(queue,1,size--); sn%fE
fixDown(1); kF .b)
} dPId= w)
file://fixdown |zKcL3*
private void fixDown(int k) { 5$X{{j2
int j; %#~Wk|8} Q
while ((j = k << 1) <= size) { 7&1: ]{_
if (j < size %26amp;%26amp; queue[j] j++; 5JXLfYTUI
if (queue[k]>queue[j]) file://不用交换 (WvA9s{/
break; aT#|mk=\
SortUtil.swap(queue,j,k); 0M?}S~p]
k = j; ><~hOK?v
} I5]zOKlVR
} yk/XfwQ5
private void fixUp(int k) { \\JXY*DA:+
while (k > 1) { T~>:8i
int j = k >> 1; {'%=tJ[YX
if (queue[j]>queue[k]) *VB*/^6A
break; ix;8S=eP~{
SortUtil.swap(queue,j,k); ^(R gSMuT`
k = j; |Oe6OCPf
} ,PYe7c
} g:yK/1@Hk}
9 pn1d.
} V5+a[`]
&PX'=UT
} 0'uj*Y{L
p WHu[Fu
SortUtil： .anL}OA_q
uHYI :(O
package org.rut.util.algorithm; q`hg@uwA{`
wlJ1,)n^2
import org.rut.util.algorithm.support.BubbleSort; b%(0AL
import org.rut.util.algorithm.support.HeapSort; <>TBM^
import org.rut.util.algorithm.support.ImprovedMergeSort; yyc&'J
import org.rut.util.algorithm.support.ImprovedQuickSort; KMV!Hqkk
import org.rut.util.algorithm.support.InsertSort; O9Aooe4W=
import org.rut.util.algorithm.support.MergeSort; \=)h6AG
import org.rut.util.algorithm.support.QuickSort; r+Y1m\
import org.rut.util.algorithm.support.SelectionSort; x{E[qH_1Fm
import org.rut.util.algorithm.support.ShellSort; ln5On_Wm
^_uzr}LE`
/** =RA6p
* @author treeroot 7+"X^$
* @since 2006-2-2 U N/.T
* @version 1.0 )=[Tgh
*/ tR3hbL$W
public class SortUtil { kVY@q&p
public final static int INSERT = 1; C;` fOCz^
public final static int BUBBLE = 2; Hg4Ut/0
public final static int SELECTION = 3; @)B_e*6>'
public final static int SHELL = 4; "<n{/x(
public final static int QUICK = 5; DWAU8>c+
public final static int IMPROVED_QUICK = 6; @,]v'l!u
public final static int MERGE = 7; [>E0(S]
public final static int IMPROVED_MERGE = 8; `*]r.u0
public final static int HEAP = 9; _~!,x.Dbp
^:BRbp37i
public static void sort(int[] data) { \MU4"sXw
sort(data, IMPROVED_QUICK); PA E)3
} L<:ya
private static String[] name={ dx^3(#B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yAOC<d9 E
}; [LCi,
(&S v$L@
private static Sort[] impl=new Sort[]{ I ;_.tG
new InsertSort(), Nn$$yUkMX
new BubbleSort(), 08Q:1 '
new SelectionSort(), -?uwlpm#
new ShellSort(), 5Ai Yx}
new QuickSort(), IH5thL@D
new ImprovedQuickSort(), B?jF1F!9
new MergeSort(), `fs[C
new ImprovedMergeSort(), k(MQ:9'|
new HeapSort() &>-Cz%IV
}; q~qig,$Y
$jHL8r\e7
public static String toString(int algorithm){ -Je+7#P1
return name[algorithm-1]; rP'oUV_
} &+\wYa,
I ?1E}bv
public static void sort(int[] data, int algorithm) { o}T]f(>}
impl[algorithm-1].sort(data); IAfYlS#<yD
} , Le_PJY)
n}l Z
public static interface Sort { HBt?cA '
public void sort(int[] data); &5B+8>
} "783F:mPh
C oaqi`v4T
public static void swap(int[] data, int i, int j) { 2dC)%]aLme
int temp = data; |k8;[+
data = data[j]; E_++yK^=
data[j] = temp; A#T;Gi
} ^C(AMT
} _7Z$"