[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; 4SlEc|'7@
} j`7q7}
int i1=l; @Jr:+|v3B
int i2=mid+1; y\k#83aU|
for(int cur=l;cur<=r;cur++){ SJ8Ax_9{q
if(i1==mid+1) RzhAXI=
data[cur]=temp[i2++]; KDxqz$14-
else if(i2>r) ?h\fwF3
data[cur]=temp[i1++]; t\S=u y
else if(temp[i1] data[cur]=temp[i1++]; xl>8B/Zmf#
else %^Zu^uu
data[cur]=temp[i2++]; $\Oc]%
} #83`T&Xw*
} Q,v/]bXd
eI%9.Cx#I
} gxPu/VD4
%[B^b)2
改进后的归并排序: /xq^]0xy
#|8Ia:=s
package org.rut.util.algorithm.support; >UNx<=ry
z*k(` '
import org.rut.util.algorithm.SortUtil; |r['"6
XCvL`
/** _3%eIyk4T
* @author treeroot uHeKttR-
* @since 2006-2-2 SFJ"(ey$
* @version 1.0 lV".-:u_
*/ AdD,94/
public class ImprovedMergeSort implements SortUtil.Sort { J~}sQ{ 0
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private static final int THRESHOLD = 10; '9u(9S
fQQj2>3w
/* /Ixv{H)H
* (non-Javadoc) f*o+g:]3
* L _D#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z=/&tRe W
*/ &$yxAqdab
public void sort(int[] data) { +9exap27
int[] temp=new int[data.length]; /#}o19(-d
mergeSort(data,temp,0,data.length-1); {:]u 6l
} \Vb|bw'e(
j[CXIz?c
private void mergeSort(int[] data, int[] temp, int l, int r) { <c3Te$.
int i, j, k; oZ5 ,y+L4
int mid = (l + r) / 2; L9{y1'')
if (l == r) L;h|Sk]{
return; fDjJdRS"
if ((mid - l) >= THRESHOLD) %-fQ[@5
mergeSort(data, temp, l, mid); swKqsN.
else ^|%u%UR
insertSort(data, l, mid - l + 1); r(j:C%?}C
if ((r - mid) > THRESHOLD) ;W{2\ Es
mergeSort(data, temp, mid + 1, r); +?)R}\\
else hh!4DHv
insertSort(data, mid + 1, r - mid); <c%
<P~pn!F}
for (i = l; i <= mid; i++) { vN&(__3((
temp = data; ;oCSKY4
} |_njN
for (j = 1; j <= r - mid; j++) { #$X _,+<HZ
temp[r - j + 1] = data[j + mid]; uA4xxY
} muAgsH$/
int a = temp[l]; =O%'qUj`q
int b = temp[r]; =&Z#QD"vl
for (i = l, j = r, k = l; k <= r; k++) { H S)$|m_
if (a < b) { 0oQJ}8t
data[k] = temp[i++]; @d|3c7` A
a = temp; 2Q%*` vCuV
} else { U4=m>Ty
data[k] = temp[j--]; qC6@
b = temp[j]; J4%"38l
} #f@}$@
} X2T_}{
} ;;S9kNp^v
ZZ>F ^t
/** v,|jmv+:
* @param data [}I|tb>Pg
* @param l 9zl-C*9vj
* @param i MbxJ3"@
*/ $px1D$F!
private void insertSort(int[] data, int start, int len) { _Un*x5u2O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?f= ~Pn+
} CHyT'RT
} 3tW}a`z9
} j^.|^q<Y
} 3aw-fuuIb
9^7z"*@#
堆排序： yMEI^,0"
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package org.rut.util.algorithm.support; T9FGuit9
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import org.rut.util.algorithm.SortUtil; <Uu[nUJ
r:M0# 2
/** *4/KK
* @author treeroot dDA,Ps
* @since 2006-2-2 fu iTy72
* @version 1.0 D+u\ORj
*/ t>P[Yld"
public class HeapSort implements SortUtil.Sort{ &Qe2 }e$
`ff@f]|3^
/* (non-Javadoc) >}B53.;.k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c*r@QmB:
*/ F. I\?b
public void sort(int[] data) { EMPujik-
MaxHeap h=new MaxHeap(); 9"?;H%.
h.init(data); ~l('ly
for(int i=0;i h.remove(); ~7gFddi=i
System.arraycopy(h.queue,1,data,0,data.length); P{HR='2
} JkI|Ojmm/
hcpe~spz9|
private static class MaxHeap{ .pG`/[*a
558!?kx$
void init(int[] data){ J| 1!4R~
this.queue=new int[data.length+1]; `YY07(%
for(int i=0;i queue[++size]=data; FE1'MUT_
fixUp(size); Y.q$"lm7k
} cqaq~
} OepQ Z|2
<sn,X0W
private int size=0; cT@H49#uB
K#Xl)h}y7
private int[] queue; Tv `&
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public int get() { 8@ S@^C*F
return queue[1]; ,Iru_=Wk~
} ~Rx`:kQ
^A=2#j~H\
public void remove() { WD5jO9Oai
SortUtil.swap(queue,1,size--); :)y3&I
fixDown(1); b\t?5z-Z
} _$/Bt?h
file://fixdown ^x Z=";eq
private void fixDown(int k) { Uu|2!}^T
int j; 4b+_|kYb
while ((j = k << 1) <= size) { VR'zm\< D
if (j < size %26amp;%26amp; queue[j] j++; >%5GMx>m
if (queue[k]>queue[j]) file://不用交换 lk[u
break; s)Xz}QPK.
SortUtil.swap(queue,j,k); ']d(m?
k = j; vsPIvW!V
} S_ra8HY8
} 5~$WSL?O)
private void fixUp(int k) { HIUP =/x
while (k > 1) { zCv)%y
int j = k >> 1; hOYX
if (queue[j]>queue[k]) <nK@+4EH"o
break; ~.#57g F"
SortUtil.swap(queue,j,k); _bRgr
k = j; 0>"y)T3
} 11Uu5e!.
} pU<GI@gU
T)tTzgLD}
} t~$8sG\
^)o]hE|
} @V&HE:P
*\_>=sS x;
SortUtil： $h}w:AV:
gB>AYL%o=
package org.rut.util.algorithm; iVo-z#
eep/96G ?
import org.rut.util.algorithm.support.BubbleSort; )`S5>[6
import org.rut.util.algorithm.support.HeapSort; L8oqlq( 9
import org.rut.util.algorithm.support.ImprovedMergeSort; q^uCZnkb=
import org.rut.util.algorithm.support.ImprovedQuickSort; NZlCn:"
import org.rut.util.algorithm.support.InsertSort; a p(PI?]X
import org.rut.util.algorithm.support.MergeSort; '*EKi
import org.rut.util.algorithm.support.QuickSort; [x- 9m\h
import org.rut.util.algorithm.support.SelectionSort; 1@}<CWE9
import org.rut.util.algorithm.support.ShellSort; ftQ;$@
rCb$^(w{7
/** (!?%"e
* @author treeroot 3HNm`b8G4m
* @since 2006-2-2 4sfq,shRq
* @version 1.0 Pb1.X9*8c
*/ EztuVe
public class SortUtil { k2.\1}\
public final static int INSERT = 1; "Z~@"JLb%
public final static int BUBBLE = 2; t3*.Bm:^
public final static int SELECTION = 3; }2^qM^,0
public final static int SHELL = 4; We*uZ?+
public final static int QUICK = 5; $@w,9J\
public final static int IMPROVED_QUICK = 6; ^E)8Sb9t
public final static int MERGE = 7; ?X\uzu
public final static int IMPROVED_MERGE = 8; n]nJ$u1u
public final static int HEAP = 9; )TBm?VMe
=`2jnvx
public static void sort(int[] data) { A'"J'q*t
sort(data, IMPROVED_QUICK); ~Q]/=HK
} mE'HRv
private static String[] name={ H_ NoW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xgtx5tg
}; ~S<}q6H.
_,? xc"
private static Sort[] impl=new Sort[]{ 5g;mc.Cvt
new InsertSort(), I0;gTpt9
new BubbleSort(), zm_8{Rta}
new SelectionSort(), ZkdSgc')
new ShellSort(), >.H}(!
new QuickSort(), ^)'D eP/
new ImprovedQuickSort(), 4F<was/
new MergeSort(), Y=H_U$
new ImprovedMergeSort(), .bRtK+}F#
new HeapSort() E 0OHl
}; n?S)H=
[.$/o}
public static String toString(int algorithm){ R:+?<U&
return name[algorithm-1]; 32pPeYxB!-
} bxWzm|
1\AcceJ|(w
public static void sort(int[] data, int algorithm) { 7\H_9o0$
impl[algorithm-1].sort(data); vg1E@rH|}
} 1uEM;O
M5xMTP-
public static interface Sort { (Zej\lEN
public void sort(int[] data); F^lau f
} {IF$\{Al
QHsJo|.
public static void swap(int[] data, int i, int j) { 1_8@yO
int temp = data; {$7vd
data = data[j]; .x}xa
data[j] = temp; 1suP7o A;
} Mp^G7JY,
} w}M)]kY