[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; Hfv7LM
} -] LY,M
int i1=l; 9eR-
int i2=mid+1; =MSr/O2
for(int cur=l;cur<=r;cur++){ z-BXd
if(i1==mid+1) $:BKzHmg
data[cur]=temp[i2++]; iMAfJ-oN
else if(i2>r) |<HPn4 ,X
data[cur]=temp[i1++]; wYdb*"R
else if(temp[i1] data[cur]=temp[i1++]; :uP,f<=)K
else kh!FR u h
data[cur]=temp[i2++]; QaS1Dh
} x%s-+&
} 67VL@ ]
# Nk;4:[
} >l]Xz*HE
\jh'9\
改进后的归并排序: ?TM,Q
%!]@J[*1
package org.rut.util.algorithm.support; :C7_Jp*Qv
LVX[uWEM
import org.rut.util.algorithm.SortUtil; d<% z 1Dj2
t;\kR4P
/** 81](T<
* @author treeroot !4]TXH0f
* @since 2006-2-2 ]-PH^H
* @version 1.0 {^ qcx8
*/ .O74V~T
public class ImprovedMergeSort implements SortUtil.Sort { pqk?|BvpK_
//*fSF
private static final int THRESHOLD = 10; T{Gj+7bQ~
t,QyfN
/* DD7h^-x
* (non-Javadoc) 2I%MAb&1@
* %;cddLQ\xY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ydFD!mO
*/ VAWF3
public void sort(int[] data) { *Tas`WA
int[] temp=new int[data.length]; yGI;ye'U
mergeSort(data,temp,0,data.length-1); !\"EFVH
} qUh2hz:
wi;Br[d
private void mergeSort(int[] data, int[] temp, int l, int r) { }]e-{C}
int i, j, k; ?Fi=P#
int mid = (l + r) / 2; ]|!OP
if (l == r) kEJj=wx
return; .GV;+8HzS
if ((mid - l) >= THRESHOLD) zepm!JR1
mergeSort(data, temp, l, mid); S-P/+K6
else e_#._Pi
insertSort(data, l, mid - l + 1); 8hXl%{6d3
if ((r - mid) > THRESHOLD) RzxNbeki[W
mergeSort(data, temp, mid + 1, r); ;P;-}u
else 7/!8e.M\
insertSort(data, mid + 1, r - mid); a,xycX:U
ks"|}9\%<
for (i = l; i <= mid; i++) { S-Wzour,
temp = data; %kv0Wefs
} rw: c
for (j = 1; j <= r - mid; j++) { $RYa6"`
temp[r - j + 1] = data[j + mid]; Q(@U2a8
} 3cFf#a#
int a = temp[l]; 4S5,w(6N
int b = temp[r]; j\,EO+ZQCv
for (i = l, j = r, k = l; k <= r; k++) { L\Aq6q@c
if (a < b) { Uhe=h&e2k@
data[k] = temp[i++]; JX-' mV`
a = temp; R?68*} `7
} else { j!_;1++q
data[k] = temp[j--]; |s'Po^Sy
b = temp[j]; &atuK*W>
} _ <WJ7
} 2#P*,
} cFaaLUZk
Jzj1w}?H
/** M1 :uJkO.
* @param data b8~Bazk
* @param l C3*gn}[
* @param i \wo?47+=
*/ >[MX:Yh
private void insertSort(int[] data, int start, int len) { `)` n(B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0C1pt5K
} "|Xk2U
} Gnf~u[T6
} O?)3VT*
} y603$Cv
^X0P'l&D2
堆排序： YwteZSbp6M
iEd\6EZ
package org.rut.util.algorithm.support; >{N9kWY
Kh,V.+7k
import org.rut.util.algorithm.SortUtil; J]v%q,"
aIJt0;
/** ~5_Ad\n9
* @author treeroot u6T+Cg
* @since 2006-2-2 18~>ZR
* @version 1.0 (}a8"]Z
*/ qLw{?sH}J/
public class HeapSort implements SortUtil.Sort{ #i@;J]x(
gGr^@=;YC
/* (non-Javadoc) :e]a$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QcgRAo+u
*/ *i]=f6G
public void sort(int[] data) { 1xD=ffM>8N
MaxHeap h=new MaxHeap(); ugo.@
h.init(data); b6}H$Sx~
for(int i=0;i h.remove(); t?q@H8
System.arraycopy(h.queue,1,data,0,data.length); ?kWC}k{
} |?rNy=P,
21 O'M
private static class MaxHeap{ .P;*Dws
.uuO>:
void init(int[] data){ /s?r`'j[
this.queue=new int[data.length+1]; %`OJ.:k
for(int i=0;i queue[++size]=data; o}W%I/s
fixUp(size); `dFq:8v
} *FC=X)_&W
} P\w\N2
eCN })An
private int size=0; bvS(@
afv~r>q(-
private int[] queue; B-.gI4xa
AmaT0tzJC
public int get() { ]e^c=O`$
return queue[1]; }R1< 0~g
} s>0't
vI2^tX9
public void remove() { j/>$,
SortUtil.swap(queue,1,size--); $>GgB`
fixDown(1); p;._HJ(
} |(pRaiJ
file://fixdown %<E$,w>
private void fixDown(int k) { e<=cdze
int j; [onGNq?#
while ((j = k << 1) <= size) { lp<g\
if (j < size %26amp;%26amp; queue[j] j++; vV[eWd.o6M
if (queue[k]>queue[j]) file://不用交换 Av"R[)
break; "$N#p5
SortUtil.swap(queue,j,k); ;u;#g
k = j; qR(\5}
} VTG9$rQZ
} n;(\5{a
private void fixUp(int k) { ]F;f`o
while (k > 1) { o=21|z
int j = k >> 1; qp/v^$EA
if (queue[j]>queue[k]) zN!ZyI$nqP
break; Q,p}:e
SortUtil.swap(queue,j,k); Db)?i?o}t
k = j; Kz>3 ic$I
} F">Qpgt
} oX0D
>}!mQpAO
} :X.b}^Z(
+VCGlr
} 0}$Hi
CACTE
SortUtil： _{r=.W+w
@c<3b2
package org.rut.util.algorithm; LUuZ9$t0J"
J13>i7]L%
import org.rut.util.algorithm.support.BubbleSort; hJDi7P
import org.rut.util.algorithm.support.HeapSort; :Qumb
import org.rut.util.algorithm.support.ImprovedMergeSort; >iD )eB
import org.rut.util.algorithm.support.ImprovedQuickSort; pV20oSJNt
import org.rut.util.algorithm.support.InsertSort; T'4z=Z]w
import org.rut.util.algorithm.support.MergeSort; *8#i$w11M
import org.rut.util.algorithm.support.QuickSort; )6+eNsxMlC
import org.rut.util.algorithm.support.SelectionSort; _C(m<n
import org.rut.util.algorithm.support.ShellSort; c}y [[EX
!X"K=zt"
/** Z0o~+Ct$
* @author treeroot $4tWI O
* @since 2006-2-2 !|O~$2O@
* @version 1.0 U7oo$gW%|T
*/ "Jt.lL ]5
public class SortUtil { r.#t63Rb
public final static int INSERT = 1; f2^r[kPX"
public final static int BUBBLE = 2; wtc!>
public final static int SELECTION = 3; e '2F#
public final static int SHELL = 4; v=_6XF
public final static int QUICK = 5; *Txl+zTY
public final static int IMPROVED_QUICK = 6; !eEHmRgg4
public final static int MERGE = 7; #bl6sa{E
public final static int IMPROVED_MERGE = 8; 5Cq{XcXV
public final static int HEAP = 9; ix(=3/Dgz
HuwU0:*
public static void sort(int[] data) { 2_zp:v
sort(data, IMPROVED_QUICK); O9EKRt
} I9:Cb)hbU]
private static String[] name={ l~6?kFy9h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o'W5|Gy
}; QAvir%Y9Q
%,D<O,N
private static Sort[] impl=new Sort[]{ &jsVw)Ue
new InsertSort(), bzX\IrJpOZ
new BubbleSort(), GlbySD@
new SelectionSort(), dHK`eS$sb
new ShellSort(), SzUpWy&
new QuickSort(), 4$*%gL;f^
new ImprovedQuickSort(), &4b&X0pU
new MergeSort(), G8r``{C!
new ImprovedMergeSort(), $)RNKMZC}A
new HeapSort() =dII- L=`
}; )yTm.F
QNARkYY~|
public static String toString(int algorithm){ iMs5zf<M
return name[algorithm-1]; hRty [
} qIY~dQ|
=!`j7#:
public static void sort(int[] data, int algorithm) { |1b_3?e
impl[algorithm-1].sort(data); &|!7Z4N
} T}"6wywM
b@S Cn9
public static interface Sort { 1RK=,Wx
public void sort(int[] data); ?r?jl;A&
} UN zlN
-5T=:2M
public static void swap(int[] data, int i, int j) { :_t}QP"
int temp = data; Y=?yhAw
data = data[j]; JaK}|
data[j] = temp; ,t`Kv1
} 0#ClWynjRO
} Eh|]i;G%