[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; r9})~>
} 5P-t{<]tx
int i1=l; ([dd)QU
int i2=mid+1; @ gWd
for(int cur=l;cur<=r;cur++){ -m%`Di!E
if(i1==mid+1) `z0q:ME
data[cur]=temp[i2++]; f(Of+>
else if(i2>r) '1gfXC
data[cur]=temp[i1++]; N8dxgh!,
else if(temp[i1] data[cur]=temp[i1++]; ?l^Xauk4Pj
else Pp tuXq%U
data[cur]=temp[i2++]; Jq'8"
} _o$jk8jOjW
} nOL"6%q
mnsl$H_4S
} XAU%B-l:
I1U2wD
改进后的归并排序: ?Z7QD8N
$0E+8xE
package org.rut.util.algorithm.support; }Pg}"fb^
m"iA#3l*=
import org.rut.util.algorithm.SortUtil; nm,LKS7
F^NK"<tW
/** <]M.K3>
* @author treeroot $zjdCg<
* @since 2006-2-2 5?^L))
* @version 1.0 x1.S+:
*/ :]m.&r S,
public class ImprovedMergeSort implements SortUtil.Sort { + '_t)k^
LnI
private static final int THRESHOLD = 10; p2i?)+z
+SH{`7r
/* d}h{#va*
* (non-Javadoc) dWvVK("Wj
* '|zrzU=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (O5Yd 6u
*/ *{DTxEy
public void sort(int[] data) { ZP<<cyY
int[] temp=new int[data.length]; zl|z4j'Irc
mergeSort(data,temp,0,data.length-1); yijP
} ro{!X,_$,
7#0buXBg
private void mergeSort(int[] data, int[] temp, int l, int r) { sI!H=bp-8
int i, j, k; &xQM!f
int mid = (l + r) / 2; tbd=A]B-
if (l == r) tTLg;YjN
return; 05`"U#`:
if ((mid - l) >= THRESHOLD) kO}&Oi,?
mergeSort(data, temp, l, mid); xV)[C )6
else bx8](cT_
insertSort(data, l, mid - l + 1); 4VwF\
if ((r - mid) > THRESHOLD) &vpKBR^
mergeSort(data, temp, mid + 1, r); \g39>;iR
else USz~l7Xs
insertSort(data, mid + 1, r - mid); rGyAzL]
fORkH^Y(&
for (i = l; i <= mid; i++) { K -U}sW
temp = data; ,_Z(!| rW
} /uwi$~Ed
for (j = 1; j <= r - mid; j++) { >%j%Mj@8q|
temp[r - j + 1] = data[j + mid]; XVYFyza;
} @Nek;xJ
int a = temp[l]; /*mF:40M;
int b = temp[r]; hw^&{x
for (i = l, j = r, k = l; k <= r; k++) { "<!U
if (a < b) { aixX/se
data[k] = temp[i++]; *9aJZWf>V
a = temp; $v|W2k
} else { o8bdL<
data[k] = temp[j--]; ^}_Ka//k
b = temp[j]; WTJ 0Q0U
} hzqJ!
} U#` e~d t<
} mLX/xM/T?/
x]+PWk
/** "jFf}"
* @param data s<9g3Gh
* @param l 6l]X{A.
* @param i A9$x8x*Lt
*/ o$rjGa l
private void insertSort(int[] data, int start, int len) { |1U_5w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ysW})#7X
} >NRppPqL
} ky2 bj}"p9
} FlBhCZ|^
} FE~D:)Xj'?
Z7;V}[wie
堆排序： _QPqF{iI
zw/AZLS
package org.rut.util.algorithm.support; zR"cj
ZSC*{dD$E
import org.rut.util.algorithm.SortUtil; cMw<3u\
6>a6;[
/** 9P?0D
* @author treeroot $Habhw
* @since 2006-2-2 jx: IK
* @version 1.0 q<JCgO-F<
*/ $TI^8 3
public class HeapSort implements SortUtil.Sort{ i+Z)`
9L=mS
/* (non-Javadoc) 7*!7EBb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 95l)s],
*/ u\]EG{w(
public void sort(int[] data) { uE-(^u
MaxHeap h=new MaxHeap(); 4ax{Chn
h.init(data); ~KBa-i%o
for(int i=0;i h.remove(); kA:mB;:
System.arraycopy(h.queue,1,data,0,data.length); v/+ <YU
} Re$h6sh
z5E%*]
private static class MaxHeap{ (Rw<1q`,
KGz Nj%
void init(int[] data){ 1/.BP
this.queue=new int[data.length+1]; =&}@GsXdo
for(int i=0;i queue[++size]=data; v"USD<
fixUp(size); )9]a
} ".?4`@7F\
} XUqorE
Eb8pM>'qM
private int size=0; p5G'})x
b6D;98p
private int[] queue; |R`"Zu`
M3(N!xT
public int get() { fF@w:;u
return queue[1]; ;qshd'?*
} Bn}woyJdx
\T7Mt|f:5
public void remove() { (jT)o,IW&
SortUtil.swap(queue,1,size--); Y6` xb`
fixDown(1); 1EyN |m|
} k# [!; <
file://fixdown <LHhs<M'
private void fixDown(int k) { tW\yt~q,
int j; OW7
while ((j = k << 1) <= size) { YKyno?m
if (j < size %26amp;%26amp; queue[j] j++; ;J%:DD
if (queue[k]>queue[j]) file://不用交换 xye-Z\-t
break; d>QFmsh-
SortUtil.swap(queue,j,k); HBlk~eZ
k = j; 50,'z?-_
} !nvwRQ
} 1-2hh)
private void fixUp(int k) { n(:<pz
while (k > 1) { mUYRioNj
int j = k >> 1; ZT0\V ]!B
if (queue[j]>queue[k]) HI.*xkBXl&
break; %Bs. XW,
SortUtil.swap(queue,j,k); 2~4:rEPJ:
k = j; AZj&;!}
} }A)\bffH
} 3BFOZV+
VY?9|};f
} 8q2a8I9g
mQ"~x]
} HW@wia
@X==[gQ
SortUtil： 8&<mg;H,
jK|n^5\
package org.rut.util.algorithm; J4Gzp~{
*uvM6F$ut
import org.rut.util.algorithm.support.BubbleSort; PL/g| ;
import org.rut.util.algorithm.support.HeapSort; bi<<z-q`wJ
import org.rut.util.algorithm.support.ImprovedMergeSort; wlS/(:02
import org.rut.util.algorithm.support.ImprovedQuickSort; {,>G 1>Yv
import org.rut.util.algorithm.support.InsertSort; \DB-2*a"
import org.rut.util.algorithm.support.MergeSort; C:QB=?%;
import org.rut.util.algorithm.support.QuickSort; nm^HL|
import org.rut.util.algorithm.support.SelectionSort; iRQ!J1SGcG
import org.rut.util.algorithm.support.ShellSort; =sJ?]U
R\j~X@vI
/** M0V<Ay\%O
* @author treeroot Y|Iq~Qy~
* @since 2006-2-2 f ,F X# _4
* @version 1.0 mZ)>^.N6
*/ }EK{UM9y
public class SortUtil { <,i4Ua
public final static int INSERT = 1; RSX27fb4
public final static int BUBBLE = 2; 9YzV48su#
public final static int SELECTION = 3; #;[G>-tC
public final static int SHELL = 4; [vg&E )V
public final static int QUICK = 5; oC0ndp~+&
public final static int IMPROVED_QUICK = 6; 56V|=MzX]
public final static int MERGE = 7; ;mQj2Bwr
public final static int IMPROVED_MERGE = 8; #]` uH{
public final static int HEAP = 9; fBSa8D3}`
a"Qf
public static void sort(int[] data) { @]3\*&R}
sort(data, IMPROVED_QUICK); XwH>F7HPe
} dC=[o\
private static String[] name={ t7=D$ua
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \Kl20?
}; S?~0)EXj(
gx&es\
private static Sort[] impl=new Sort[]{ y|`-)fY
new InsertSort(), JEjxY&
new BubbleSort(), \!u<)kkyT
new SelectionSort(), Lqgrt]L_"
new ShellSort(), -TUJ"ep]QJ
new QuickSort(), !KHgHKEW^
new ImprovedQuickSort(), uibmQ|AQ
new MergeSort(), XKp&GE@Y
new ImprovedMergeSort(), 8^7Oc,:~
new HeapSort() ug3\K83aj/
}; qng ~,m
y`I>|5[`
public static String toString(int algorithm){ +%dXB&9x|Z
return name[algorithm-1]; >0^<<=m
} EX,>V,.UV
EPm~@8@"j?
public static void sort(int[] data, int algorithm) { : auR0FE
impl[algorithm-1].sort(data); *`>BOl+ro
} k^5Lv#Z
J1w;m/oV
public static interface Sort { /\mtCa.O
public void sort(int[] data); jJ$\WUQ.
} QiK>]xJ'
qTsy'y;Z
public static void swap(int[] data, int i, int j) { zdN[Uc+1Bd
int temp = data; { I#>6
data = data[j]; 65EMB%
data[j] = temp; 0 QTI;3
} YT(N][V
} kx,.)qKk