[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; C}(@cn `L
} Y%eq2%
int i1=l; C$0g2X
int i2=mid+1; ~d].<Be
for(int cur=l;cur<=r;cur++){ i(_A;TT6
if(i1==mid+1) GGf<9!:
data[cur]=temp[i2++]; Le:(;:eL>t
else if(i2>r) N/ f7"~+`
data[cur]=temp[i1++]; >,E^ R`y
else if(temp[i1] data[cur]=temp[i1++]; Nk<^ Qv
else 4"_`Mu_%
data[cur]=temp[i2++]; {0j_.XZ
} [F'|KcE3
} 2:_6nWl
=#v? }JG
} |JP19KFx'B
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改进后的归并排序: z~ywFk}KGd
<N1wET-
package org.rut.util.algorithm.support; B]@25
FJ-H ;
import org.rut.util.algorithm.SortUtil; L,[Q{:CS
]8}51y8
/** +[<YE
* @author treeroot AYgXqmH~+
* @since 2006-2-2 fCwE1r*^
* @version 1.0 fGO\f;P
*/ ^lAM /
public class ImprovedMergeSort implements SortUtil.Sort { TS#[[^!S
nYFrp)DLK
private static final int THRESHOLD = 10; FY ms]bv
I#&r5Q
/* ZZ7qSyBs?
* (non-Javadoc) i'7+ ?YL
* LP=j/qf|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dH!z<~
*/ An$2='=/
public void sort(int[] data) { xC,x_:R`
int[] temp=new int[data.length]; bh<;px-
mergeSort(data,temp,0,data.length-1); Vv45w#w;
} !t^DN\\#
PO`p.("h
private void mergeSort(int[] data, int[] temp, int l, int r) { C+llA
int i, j, k; }Nsdk',}
int mid = (l + r) / 2; D%abBE1
if (l == r) USEb} M`
return; 0z8?6~M;<
if ((mid - l) >= THRESHOLD) Jsysk $R
mergeSort(data, temp, l, mid); L23}{P
else w?8SQI,~X
insertSort(data, l, mid - l + 1); ;~EQS.Qp
if ((r - mid) > THRESHOLD) d51'[?(
mergeSort(data, temp, mid + 1, r); Aj)Q#Fd[
else xwf-kwF8^
insertSort(data, mid + 1, r - mid); nUOi~cs
L%T(H<G
for (i = l; i <= mid; i++) { {d'-1z"q
temp = data; pA~}_
} >%k6k1CZ
for (j = 1; j <= r - mid; j++) { k~^4
temp[r - j + 1] = data[j + mid]; MQQm3VaKS
} b,E?{uG
int a = temp[l]; D&"D[|@
int b = temp[r]; y %Q.(
for (i = l, j = r, k = l; k <= r; k++) { <Gi%+I@szl
if (a < b) { +cfEyiub
data[k] = temp[i++]; G{3|d/;Bt
a = temp; O\ZC$XF
} else { >ESVHPj]
data[k] = temp[j--]; #*'Qm A
b = temp[j]; Dz(\ ?
} S^eem_C
} y|2<Vc
} G}fBd
@kWL "yy,
/** +e-F`k
* @param data x#J9GP.
* @param l gSz<K.CT
* @param i 94rSB}b.O
*/ j#1G?MF
private void insertSort(int[] data, int start, int len) { lh8QtPe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P.'.KZJ:WD
} X.eOw>.
} h0'*)`;z
} vR!+ 8sy$
} JaCX}[R
m&:&z7^p
堆排序： zj1~[$ (
{> YsrD C
package org.rut.util.algorithm.support; Io1j%T#ZT
eQuu\/z*H
import org.rut.util.algorithm.SortUtil; 5#,H&ui\
P:"R;YCvE
/** YYv0cV{E
* @author treeroot >fH0>W+!
* @since 2006-2-2 "' JnFM
* @version 1.0 /MGapmqV9
*/ |9#q7kM
public class HeapSort implements SortUtil.Sort{ {A/r)
EtKq.<SJ
/* (non-Javadoc) j_~KD}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xp:A;i9
*/ {]k#=a4
public void sort(int[] data) { +e>SK!kB7
MaxHeap h=new MaxHeap(); #ibwD:{
h.init(data); UK ':%LeL
for(int i=0;i h.remove(); ]n!V
System.arraycopy(h.queue,1,data,0,data.length); r5}p .
} ppyy0E^M
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private static class MaxHeap{ CS7b3p!I
srVWN:uuH
void init(int[] data){ 5/=$p:E>
this.queue=new int[data.length+1]; ';tlV u
for(int i=0;i queue[++size]=data; ^kKLi
fixUp(size); )9YDNVo*-
} g:o/^_
} Uwc%'=@
Lce,]z\_
private int size=0; g\q .
xMJ-=
private int[] queue; FA+HR
6}^x#9\
public int get() { sL$sj|"S
return queue[1]; p&(0e,`z/
} -9b=-K.y
1bFZyD"
public void remove() { \p4*Q}t
SortUtil.swap(queue,1,size--); .]v>LsbhF
fixDown(1); dn(!wC]
} kR<sSLEb
file://fixdown f2WVg;Z
private void fixDown(int k) { aTvyzr1
int j; oGcgd$%ZB
while ((j = k << 1) <= size) { _Xf1FzF+a
if (j < size %26amp;%26amp; queue[j] j++; Y&6jFT_
if (queue[k]>queue[j]) file://不用交换 1)X|?ZD]F
break; 7{#p'.nc5
SortUtil.swap(queue,j,k); b~gq8,Fatb
k = j; ynsYU(
} TGJz[Ny
} ht-'O"d:
private void fixUp(int k) { REh"/d
while (k > 1) { 5U2%X pO
int j = k >> 1; Et0gPX-
if (queue[j]>queue[k]) '.v;/[0
break; -wn-PB@r
SortUtil.swap(queue,j,k); +~5Lo'^
k = j; o?a2wY^_
} L4po1
} /@`"&@W'
,RPb<3 B
} NS[Z@@
jJ2rfdfj
} 6()Jx%
!X}+JeU'
SortUtil： MT{1/A;`)
*).
package org.rut.util.algorithm; 1I2ndt
C6e5*S
import org.rut.util.algorithm.support.BubbleSort; hC$e8t60
import org.rut.util.algorithm.support.HeapSort; Es[3Ppz
import org.rut.util.algorithm.support.ImprovedMergeSort; `{#""I^_
import org.rut.util.algorithm.support.ImprovedQuickSort; AF:_&gF
import org.rut.util.algorithm.support.InsertSort; L'wR$
import org.rut.util.algorithm.support.MergeSort; =c6d$
import org.rut.util.algorithm.support.QuickSort; gW~YB2 $
import org.rut.util.algorithm.support.SelectionSort; a!o%x
import org.rut.util.algorithm.support.ShellSort; rCo}^M4Pb
b'O/u."O
/** [r2V+b.C
* @author treeroot w"v96%"Y
* @since 2006-2-2 8(? &=>@
* @version 1.0 Jq^[^
*/ M(>74(}]
public class SortUtil { (6fD5XtS
public final static int INSERT = 1; -c>3|bo
public final static int BUBBLE = 2; ndQw>
public final static int SELECTION = 3; PcsYy]Q/
public final static int SHELL = 4; mU[\//
public final static int QUICK = 5; ;1~n|IY
public final static int IMPROVED_QUICK = 6; nKE^km
public final static int MERGE = 7; "/R?XCBZsb
public final static int IMPROVED_MERGE = 8; %qV:h#
public final static int HEAP = 9; Ea4zC|;
`C4(C4u
public static void sort(int[] data) { >:.c?{%g*
sort(data, IMPROVED_QUICK); ^2dQVV.
} x}ZXeqt{{
private static String[] name={ zW`Hqt;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?<J~SF Tt
}; |K.I%B
xjp0w7L)J
private static Sort[] impl=new Sort[]{ IfH/~EtX
new InsertSort(), Lum=5zDo
new BubbleSort(), 5]G%MB/|$
new SelectionSort(), F*G]Na@6D
new ShellSort(), c6b51)sQ"
new QuickSort(), X[/7vSqZ@w
new ImprovedQuickSort(), hGKQK ^bn
new MergeSort(), Wt%Wpb8
new ImprovedMergeSort(), /\,3AInLb
new HeapSort() I?1BGaAA
}; blomB2vQ
ce$[H}rDB
public static String toString(int algorithm){ *lDVV,T'}w
return name[algorithm-1]; eJf]"-
} V1,p<>9
wtbN@g0
public static void sort(int[] data, int algorithm) { rrC\4#H[??
impl[algorithm-1].sort(data); "7-}#_!g
} |zRrGQYm
BuvnY
public static interface Sort { ~"*W;|)
public void sort(int[] data); ~APS_iG[
} ,OrrGwp&
oHfr glGX
public static void swap(int[] data, int i, int j) { (<.\v@7HC
int temp = data; QUkP&sz
data = data[j]; r7R39#
data[j] = temp; }x|q*E\
} }S*]#jr&
} iYiTkq