[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; <rxtdI"3
} SZ1yy["
int i1=l; YF)k0bu&;
int i2=mid+1; SFR<T
for(int cur=l;cur<=r;cur++){ ;cfPS
if(i1==mid+1) <S3s==Cg
data[cur]=temp[i2++]; &a.A8v)
else if(i2>r) Z -fiJ75
data[cur]=temp[i1++]; (\UpJlW
else if(temp[i1] data[cur]=temp[i1++]; Y49&EQ
else N;gY5;0m
data[cur]=temp[i2++]; $i@I|y/
} Y.kgJ #2
} M;9s
*Gul|Lp$<I
} ]-;MY@
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改进后的归并排序: >R}G
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package org.rut.util.algorithm.support; }#h`1 uV
#Q'#/\5
import org.rut.util.algorithm.SortUtil; `j8pgnY>5~
Cy dV$!&mP
/** +w/B3b
* @author treeroot b/?)_pg
* @since 2006-2-2 2N{^V?:
* @version 1.0 4W#DLip9
*/ +{0v@6<(02
public class ImprovedMergeSort implements SortUtil.Sort { >&ENrvaJ
0f#xyS 3
private static final int THRESHOLD = 10; cx]H8]ch7
ow{J;vFy\
/* c9x&:U
* (non-Javadoc) 'xLXj>
* RsYMw3)G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qk >9o
*/ E0AbVa.
public void sort(int[] data) { vXm'ARj
int[] temp=new int[data.length]; ne: 'aq
mergeSort(data,temp,0,data.length-1); vi28u xc
} &0i$Y\g
YSrjg|k*
private void mergeSort(int[] data, int[] temp, int l, int r) { !jvl"+_FV
int i, j, k; 3CH>!QOA
int mid = (l + r) / 2; fN/;BT
if (l == r) (&Rql7](8
return; 7>=
if ((mid - l) >= THRESHOLD) 0SQrz$y
mergeSort(data, temp, l, mid); pHXs+Ysw+
else P\WFm
insertSort(data, l, mid - l + 1); <HtGp6q
if ((r - mid) > THRESHOLD) yf7|/M
mergeSort(data, temp, mid + 1, r); Mh{244|o[
else _PcF/Gyk
insertSort(data, mid + 1, r - mid); 33; '6/
QQHQ3\
for (i = l; i <= mid; i++) { NcBz("
temp = data; et"Pb_-U
} bB>.dC
for (j = 1; j <= r - mid; j++) { xS>vmnW
temp[r - j + 1] = data[j + mid]; tW a'[2L
} !nq`PyMR
int a = temp[l]; #m17cDL
int b = temp[r]; iL2__TO
for (i = l, j = r, k = l; k <= r; k++) { 5KP\#Y
if (a < b) { OADW;fj
data[k] = temp[i++]; Ot)S\s>
a = temp; ik#Wlz`4
} else { `5e{ec c7
data[k] = temp[j--]; 3-&~jm~"
b = temp[j]; Paeq
} s/.P/g%tA>
} wqi0%Cu*
} Z~<=I }@
~>N63I6
/** plp-[eKcD
* @param data J.'%=q(Sb
* @param l ANNVE},
* @param i 9ln=f=
*/ q#@r*hl
private void insertSort(int[] data, int start, int len) { ,i1BoG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &=MVX>[
} N:+)6a
} \|6VGh \Z
} QM* T?PR
} ]-9w'K d
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堆排序： MB7*AA;
U1HG{u,"y
package org.rut.util.algorithm.support; TEh.?
#4lIna%VX
import org.rut.util.algorithm.SortUtil; !/!ga)Y
o.kDOqd
/** M9afg$;.xe
* @author treeroot N#ZWW6
* @since 2006-2-2 k}p8"'O
* @version 1.0 $dXx@6fP
*/ *c [^/
public class HeapSort implements SortUtil.Sort{ Dk>6PBl
".%d{z}vz
/* (non-Javadoc) d#]hqy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :vX%0|
*/ k|\M(Z*(P
public void sort(int[] data) { fIl!{pv[
MaxHeap h=new MaxHeap(); jw9v&/-
h.init(data); _Z!@#y@j
for(int i=0;i h.remove(); [61*/=gWe
System.arraycopy(h.queue,1,data,0,data.length); K,I
} k@un}}0r
w#[cGaIB
private static class MaxHeap{ 3fp&iz
n=bdV(?4
void init(int[] data){ 7KX27.~F
this.queue=new int[data.length+1]; o{! :N>(
for(int i=0;i queue[++size]=data; ! xG*W6IT
fixUp(size); \Dy|}LE
} A+gS'DZ9C
} -F[@)$L
`d$@1
private int size=0; -YAtM-VL
|oke)w=gn
private int[] queue; QxdC[t$Lp
B~N3k
public int get() { Qj;{Z*l%+
return queue[1]; {x.0Yh7
} nvT@'y+
"I)zi]vk
public void remove() { ,!b<SQ5M
SortUtil.swap(queue,1,size--); |5tZ*$nGa
fixDown(1); (or"5}\6-
} R6Ov
file://fixdown z-606g
private void fixDown(int k) { uBa<5YDF
int j; *$W&jfW
while ((j = k << 1) <= size) { UUlz3"`
if (j < size %26amp;%26amp; queue[j] j++; @anjjC5a~
if (queue[k]>queue[j]) file://不用交换 O"+0 b|
break; GaG>0x
SortUtil.swap(queue,j,k); 8>,w8(Nt
k = j; `H6~<9r
} QJRnpN/
} sHc-xnd
private void fixUp(int k) { (X,i,qK/
while (k > 1) { xBA"w:<
int j = k >> 1; #aU!f"SS
if (queue[j]>queue[k]) *>KBDFI
break; 5C9b*]-#
SortUtil.swap(queue,j,k); twq~.:<o
k = j; jh)@3c
} (+epRC
} 7!pKlmQ
ZQ_6I}i")
} KDq="=q
o~IAZU39
} ~qrSHn}+PU
]|.ked
SortUtil： ^0}ma*gi~
)ZpI%M?)
package org.rut.util.algorithm; hj9TiH/+
Td|u@l4B
import org.rut.util.algorithm.support.BubbleSort; GQn:lu3j:
import org.rut.util.algorithm.support.HeapSort; oNyYx6q:Q
import org.rut.util.algorithm.support.ImprovedMergeSort; WC`h+SC`.
import org.rut.util.algorithm.support.ImprovedQuickSort; ?gl&q+mv
import org.rut.util.algorithm.support.InsertSort; G/<zd)
import org.rut.util.algorithm.support.MergeSort; :xPo*#[Z(A
import org.rut.util.algorithm.support.QuickSort; "mW'tm1+
import org.rut.util.algorithm.support.SelectionSort; oNAnJ+_
import org.rut.util.algorithm.support.ShellSort; igfQ,LWe!
|(z{)yWbC[
/** b4e~Z
* @author treeroot %-540V{q
* @since 2006-2-2 *y?HaU
* @version 1.0 q2vD)r
*/ bTc>-e,
public class SortUtil { |(3y09
public final static int INSERT = 1; :rVR{,pL
public final static int BUBBLE = 2; 0%rDDB
public final static int SELECTION = 3; Q+T#J9Y
public final static int SHELL = 4; q`'f /CS
public final static int QUICK = 5; OuTV74
public final static int IMPROVED_QUICK = 6; M?eP1v:<+G
public final static int MERGE = 7; FfJp::|ddr
public final static int IMPROVED_MERGE = 8; Qh1pX}X
public final static int HEAP = 9; FBNLszT{L
9{jMO
public static void sort(int[] data) { WMf / S"=
sort(data, IMPROVED_QUICK); (@+pz/
} t<p#u=jOa
private static String[] name={ z3tx]Ade
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #cfiN b}GX
}; ;\mX=S|a
$v;WmYTJ
private static Sort[] impl=new Sort[]{ #c^]p/
new InsertSort(), x|rc[e%k
new BubbleSort(), <eG|`
new SelectionSort(), 1_]X
new ShellSort(), \%a0Lp{ I
new QuickSort(), 89FAh6uE
new ImprovedQuickSort(), Xxg|01
new MergeSort(), ?$f.[;mh
new ImprovedMergeSort(), 4H-eFs%5
new HeapSort() yxt"vm;
}; L@S\ rImw
4>jHS\jc
public static String toString(int algorithm){ O2{["c e
return name[algorithm-1]; SH?McBxS
} #Q8_:dPY
f1 x&Fk
public static void sort(int[] data, int algorithm) { h+Co:pr
impl[algorithm-1].sort(data); */;7Uv7
} ,TQec:B
IgX &aW
public static interface Sort { 6!m#;8 4
public void sort(int[] data); j 2ag b
} xaMDec V
f8:nKb>nq$
public static void swap(int[] data, int i, int j) { ^5sA*%T4
int temp = data; PXMd=,}
data = data[j]; w.?4}'DK
data[j] = temp; ccag8LC
} %;'~TtW5
} j&d5tgLB