[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; 2N(Z^
} 3J8>r|u;1'
int i1=l; Qhe<(<^J,
int i2=mid+1; IuFr:3(
for(int cur=l;cur<=r;cur++){ TUGD!b{
if(i1==mid+1) 82)=#ye_P
data[cur]=temp[i2++]; X?ZLmP7|
else if(i2>r) 7CSn79E
data[cur]=temp[i1++]; ,6^Xn=o #
else if(temp[i1] data[cur]=temp[i1++]; :Eh}]_
else GXLh(d!C
data[cur]=temp[i2++]; uZf 6W<a
} ~tL:r=
} 19% "F!^i
r4K_Wp
} @D["#pe,}
EAr;
改进后的归并排序: Uv?^qe0=
~T9QpL1OJ
package org.rut.util.algorithm.support; q|klsup
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import org.rut.util.algorithm.SortUtil; aox@- jyr
(,mV6U%
/** u"T9w]Z\
* @author treeroot <tO@dI$~>
* @since 2006-2-2 PGZe'r1E9
* @version 1.0 iVVR$uzhH
*/ um<$L
public class ImprovedMergeSort implements SortUtil.Sort { r.u\qPT&
2u0B=0x
private static final int THRESHOLD = 10; *Vb#@O!
eMEKR5*-O
/* :%28*fl
* (non-Javadoc) jL)Y'
* lpB:lRM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GaJE(N
*/ VqD_FS;E
public void sort(int[] data) { ]4')H;'y
int[] temp=new int[data.length]; RV]QVA*i
mergeSort(data,temp,0,data.length-1); $6ucz'
} oFt_ yU-
xHx_! )7
private void mergeSort(int[] data, int[] temp, int l, int r) { rHybP6C<
int i, j, k; &eO.h%@
int mid = (l + r) / 2; p.MLKp-'
if (l == r) qUg/mdv&
return; "9X(.v0ze
if ((mid - l) >= THRESHOLD) @^# 9N!Fj]
mergeSort(data, temp, l, mid); VWYNq^<AT
else a>6M{C@pd
insertSort(data, l, mid - l + 1); cN2Pl%7
if ((r - mid) > THRESHOLD) n Jz*}=
mergeSort(data, temp, mid + 1, r); uHZjpMoM
else ~U]%>Zf
insertSort(data, mid + 1, r - mid); ]A+t@/k
EronNtu8i
for (i = l; i <= mid; i++) { X=Y(,ZR(&
temp = data; o8A8fHl
} wvxqgXnB\
for (j = 1; j <= r - mid; j++) { KB~`3Wj|Z
temp[r - j + 1] = data[j + mid]; B'O1dRj&6
} WU/5i 8
int a = temp[l]; hp7ni1V
int b = temp[r]; *.A-UoHa
for (i = l, j = r, k = l; k <= r; k++) { p Zxx
if (a < b) { q+;lxR5D
data[k] = temp[i++]; cF iTanu
a = temp; <)J@7@!P
} else { A??a:8id^
data[k] = temp[j--]; jCx*{TO
b = temp[j]; 8A*tpMV?J
} i$:yq.DW
} ignOF
} ulEtZ#O{_
2]x,joB
/** Mx3fT>?
* @param data U`{ M1@$
* @param l !af;5F
* @param i {)kL7>u]^V
*/ wXYT(R
private void insertSort(int[] data, int start, int len) { ?<OyJ|;V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rc`Il{~k
} !0Ak)Q]e'
} A-^B?E
} hsK(09:J
} ZXbq5p_
b+dmJ]c
堆排序： HR
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package org.rut.util.algorithm.support; hA`9[58/
gxVJH'[V5
import org.rut.util.algorithm.SortUtil; e9CvdR
wSALK)T1{
/** _jVJkg)]
* @author treeroot ,[_)BM
* @since 2006-2-2 G 8tK"LC
* @version 1.0 !_dW `
*/ {=Py|N\\t
public class HeapSort implements SortUtil.Sort{ pUgas?e&
i1HO>X:ea
/* (non-Javadoc) !:_krLB<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !l9#a{#6l
*/ 6Tq2WZ}<'
public void sort(int[] data) { Pi%-bD/w
MaxHeap h=new MaxHeap(); {-|El}.M
h.init(data); sI4 FgO
for(int i=0;i h.remove(); =wl0
System.arraycopy(h.queue,1,data,0,data.length); G+3uY25y
} %2?"x*A
)R@Y$*fm
private static class MaxHeap{ )1)&fN41i#
IJ{VCzi
void init(int[] data){ Z#GR)jb+
this.queue=new int[data.length+1]; \x_$Pu
for(int i=0;i queue[++size]=data; {PL,3EBG
fixUp(size); ])zpx-
} ]go.IfH
} LH~ t5
a=[|"J<M
private int size=0; 1u* (=!
S! .N3ezn
private int[] queue; On@p5YRwW
v1NFz>Hx
public int get() { BK.RYSN
return queue[1]; |fn%!d`2
} U71A#OD^U
RS7J~Q
public void remove() { Vl:M6d1
SortUtil.swap(queue,1,size--); A<[w'"
fixDown(1); <.@w%rvG
} 7P52r
file://fixdown 'f.5hX(Y
private void fixDown(int k) { H_%ae'W
int j; fa/p
while ((j = k << 1) <= size) { JNA_*3'
if (j < size %26amp;%26amp; queue[j] j++; Mi[,-8Sk
if (queue[k]>queue[j]) file://不用交换 ^687U,+
break; h{PJ4U{W
SortUtil.swap(queue,j,k); [} %=&B
k = j; kChCo0Q>1
} z9zo5Xc=
} lF$$~G
private void fixUp(int k) { tkdyR1-
while (k > 1) { uF T5Z
int j = k >> 1; c+<gc:#jy
if (queue[j]>queue[k]) 9lX+?m~ ~
break; (=s%>lW|
SortUtil.swap(queue,j,k); ,0n=*o@W
k = j; u z:@
} cdfnM%`>\
} SsIN@
zOL*XZ0c
} 8w3Wy<}y
T(*A0
} j<vU[J+gx~
>DR/lBtL
SortUtil： 3^F1hCB
PO0/C q)
package org.rut.util.algorithm; d 4;
A~wyn5:_
import org.rut.util.algorithm.support.BubbleSort; h)?Km{u%
import org.rut.util.algorithm.support.HeapSort; 9Cw !<
import org.rut.util.algorithm.support.ImprovedMergeSort; #Xun>0
import org.rut.util.algorithm.support.ImprovedQuickSort; *zDL5 9
import org.rut.util.algorithm.support.InsertSort; GF*E+/ ;
import org.rut.util.algorithm.support.MergeSort; h56s~(?O
import org.rut.util.algorithm.support.QuickSort; G*^4CJ
import org.rut.util.algorithm.support.SelectionSort; ^}hSsE
import org.rut.util.algorithm.support.ShellSort; |Fzt| \
Ua>.k|>0
/** V5]\|?=
* @author treeroot rK cr1VFy
* @since 2006-2-2 zm^5WH
* @version 1.0 z%/<|` 7
*/ Dl=vv9
public class SortUtil { yc@:*Z
public final static int INSERT = 1; bKPjxN?!9
public final static int BUBBLE = 2; #r80FVwiD
public final static int SELECTION = 3; G4,BcCPQ
public final static int SHELL = 4; .J9\Fr@
public final static int QUICK = 5; ?Q}3X-xy
public final static int IMPROVED_QUICK = 6; <``krPi
public final static int MERGE = 7; H~ =;yy
public final static int IMPROVED_MERGE = 8; 4' <y
public final static int HEAP = 9; C3 (PI,,
BlfW~l'mx
public static void sort(int[] data) { c *Pt;m
sort(data, IMPROVED_QUICK); 5ZHO+@HiFH
} Th5}?j7
private static String[] name={ ;UWp0d%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x/#.%Ga#T
}; ?}U l(
eLop}*k
private static Sort[] impl=new Sort[]{ .+CMm5T
new InsertSort(), >tV:QP]Y
new BubbleSort(), 78u=Jz6
new SelectionSort(), *(Us:*$W.
new ShellSort(), U,^jN|v
new QuickSort(), T`|>oX
new ImprovedQuickSort(), is=|rY9$
new MergeSort(), _K|?;j#x0k
new ImprovedMergeSort(), FGRG?d4?h
new HeapSort() 5~SBZYI
}; P,SI0$Z
Kr;F4G|Qt
public static String toString(int algorithm){ aW$))J)0
return name[algorithm-1]; )mRKIM}*W
} R~XNF/QMl
I$Fr8R$
public static void sort(int[] data, int algorithm) { K|{&SU_m
impl[algorithm-1].sort(data); q|R$A8)L.
} 4S,/Z{ J.
3a6
public static interface Sort { Z`bo1,6>
public void sort(int[] data); SrSm%Dv
} yg@}j
29h_oNO
public static void swap(int[] data, int i, int j) { fuA8jx
int temp = data; gd\b]L?>O
data = data[j]; m_>~e}2'A
data[j] = temp; T ^z Mm
} O6r.q&U
} k.w}}78N2N