[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; niCK(&z
} )%S@l<%@?
int i1=l; 'ux!:b"
int i2=mid+1; q/zU'7%@
for(int cur=l;cur<=r;cur++){ *]HnFP
if(i1==mid+1) ms5?^kS2O
data[cur]=temp[i2++]; _p4]\LA
else if(i2>r) <A=1]'1\r
data[cur]=temp[i1++]; &*"*b\
else if(temp[i1] data[cur]=temp[i1++]; JDR_k
else Uc:NW
data[cur]=temp[i2++]; 6d/Q"As
} VQqBo~
} G\F>*
r!fUMDS
} 2#:p:R8I>
M5w/TN
改进后的归并排序: TaD;_)(
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package org.rut.util.algorithm.support; V'{\g|)
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import org.rut.util.algorithm.SortUtil; ,DE>:ARZ
OWwqCPz.
/** l+ >eb
* @author treeroot d2Q*1Q@u
* @since 2006-2-2 8cOft ;|qB
* @version 1.0 4j=K3m
*/ JqMF9|{H
public class ImprovedMergeSort implements SortUtil.Sort { 6Jq[]l"v
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private static final int THRESHOLD = 10; %gO/mj3*
_rB,N#{2R=
/* -->0e{y
* (non-Javadoc) CnL=s6XD'
* H}kSXKO8!8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MuOKauYa
*/ 3%?tUt
public void sort(int[] data) { tXtNK2-1
int[] temp=new int[data.length]; 8O]`3oa>
mergeSort(data,temp,0,data.length-1); [HYr|T
} MAkr9AKb,
-c]AS[(
private void mergeSort(int[] data, int[] temp, int l, int r) { 9x@|%4Zm"
int i, j, k; 3E*m.jX
int mid = (l + r) / 2; $2h%IK>#G
if (l == r) E>]K#H
return; J6s]vV q"
if ((mid - l) >= THRESHOLD) -ymDRoi
mergeSort(data, temp, l, mid); -MS#YcsV
else ]87BP%G
insertSort(data, l, mid - l + 1); f/O6~I&g
if ((r - mid) > THRESHOLD) e1-tpD:J
mergeSort(data, temp, mid + 1, r); HuTtp|zM>
else LE<J<~2Z
insertSort(data, mid + 1, r - mid); 24#qg'
L>~Tc
for (i = l; i <= mid; i++) { ,9bnR;f\
temp = data; j~{cT/5Y_
} w1"+HJd
for (j = 1; j <= r - mid; j++) { 4{F1GW
temp[r - j + 1] = data[j + mid]; Kb(11$U
} edo)W mn
int a = temp[l]; x']'ODs
int b = temp[r]; ) FR7t
for (i = l, j = r, k = l; k <= r; k++) { ]w6Q?%'9
if (a < b) { =^u;uS[IW
data[k] = temp[i++]; {V6pC
a = temp; G~<UP(G
} else { GAgTy
data[k] = temp[j--]; * $f`ouJl
b = temp[j]; ;B=aK"\
} ia'z9
} jj[6oNKE1
} fYUV[Gm
l{Df{1b.
/** L_!ShE
* @param data oVy{~D=
* @param l O<cP1TF
* @param i ;`#R9\C=h
*/ ;Z{D@g+
private void insertSort(int[] data, int start, int len) { ElQ?|HsQ6p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7v%c.
} \_1a#|97e
} WSHPhhM
} %BGg?&
} v,ssv{gU
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堆排序： EB*sd S
2; ^ME\
package org.rut.util.algorithm.support; Vbl-Ff
1'<C-[1
import org.rut.util.algorithm.SortUtil; Bx#i?=*W
4MS<t FH)
/** C")genMH
* @author treeroot )cJ>&g4]
* @since 2006-2-2 ~'_cBJ 'XD
* @version 1.0 ;yJ:W8U]+;
*/ o]oiJvOr
public class HeapSort implements SortUtil.Sort{ &+2l#3}
06pvI}
/* (non-Javadoc) _Ub `\ytx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !e|\1v'0
*/ !B3TLeh
public void sort(int[] data) { R(~wSL*R>
MaxHeap h=new MaxHeap(); H\S)a FY[
h.init(data); U7s$';y"%
for(int i=0;i h.remove(); O{X~,Em=q
System.arraycopy(h.queue,1,data,0,data.length); W r/-{Wt
} lv 8EfN
-)}s{[]d6m
private static class MaxHeap{ sE"s!s/
:k/Xt$`
void init(int[] data){ 2 kDsIEA
this.queue=new int[data.length+1]; `}PYltW
for(int i=0;i queue[++size]=data; 7s(tAbPdB
fixUp(size); 92DM1~ *
} 6CBk=)qH
} dDPQDIx
_B^zm-}8|B
private int size=0; ~18a&T:
WBE>0L
private int[] queue; C{}_Rb'x
\~5|~|9<
public int get() { q7X]kr*qx
return queue[1]; OH\^j1x9I
} Q7865
xR1G
public void remove() { hk~/W}sI
SortUtil.swap(queue,1,size--); W" 5nS =d%
fixDown(1); )Z/"P\qo
} OldOc5D
file://fixdown "313eeIt%i
private void fixDown(int k) { NHGTV$T`1
int j; \]9)%3I
while ((j = k << 1) <= size) { q\0/6tl_
if (j < size %26amp;%26amp; queue[j] j++; sAkr-x?+M
if (queue[k]>queue[j]) file://不用交换 J$3g3%t
break; @ma(py
SortUtil.swap(queue,j,k); 5WQl?yMP
k = j; kTvM,<
} D4=*yP
} X$Vi=fvt
private void fixUp(int k) { fW-C`x
while (k > 1) { ShB]U5b:k
int j = k >> 1; 3"y 6|e/5
if (queue[j]>queue[k]) ! xCo{U=
break; UD.bb
SortUtil.swap(queue,j,k); r`O Yq
k = j; c$g@3gL
} 1-_r\sb
} \fA{sehdL
5f-b>=02
} ^dQ{vL@9b9
REUxXaN>Z
} )%7P?^>
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SortUtil： Qz~uD'Rs/
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package org.rut.util.algorithm; "D(Lp*3hj&
`R[Hxi
import org.rut.util.algorithm.support.BubbleSort; }E 'r?N
import org.rut.util.algorithm.support.HeapSort; _Iy\,<
import org.rut.util.algorithm.support.ImprovedMergeSort; 8%[pno |0I
import org.rut.util.algorithm.support.ImprovedQuickSort; @Wu-&Lb
import org.rut.util.algorithm.support.InsertSort; L:G#>
import org.rut.util.algorithm.support.MergeSort; `%C-7D'?
import org.rut.util.algorithm.support.QuickSort; Y %JQ
import org.rut.util.algorithm.support.SelectionSort; V'vR(Wx
import org.rut.util.algorithm.support.ShellSort; ux;?WPyr
[^5\Ww
/** ks4`h>i
* @author treeroot L|=5jn9 :
* @since 2006-2-2 jJ,_-ui
* @version 1.0 1+x" 5<(W
*/ CXlbtpK2k
public class SortUtil { qkb'@f=
public final static int INSERT = 1; NX @FUct;
public final static int BUBBLE = 2; PMzPj,
public final static int SELECTION = 3; (`tRJWbdz
public final static int SHELL = 4; :L[>!~YG_n
public final static int QUICK = 5; aLO^>",
public final static int IMPROVED_QUICK = 6; PVCoXOqh
public final static int MERGE = 7; -=ZL(r 1
public final static int IMPROVED_MERGE = 8; .G0 N+)
public final static int HEAP = 9; Luq4q95]
a{5SOe;;
public static void sort(int[] data) { #z `W ,^C
sort(data, IMPROVED_QUICK); ,erw(7}'.
} ;5[KZ8j6Y
private static String[] name={ ht3.e[%'b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (`P\nnb
}; lPTx] =G
yeo&Qz2vU
private static Sort[] impl=new Sort[]{ P?54"$b
new InsertSort(), +EETo):
new BubbleSort(), FcDS*ZEk!
new SelectionSort(), 4.RQ3SoDa
new ShellSort(), zKJ2~=
new QuickSort(), .|UQ)J?s
new ImprovedQuickSort(), {Cx5m
new MergeSort(), YDt+1Kw}D
new ImprovedMergeSort(), y>^a~}Zq
new HeapSort() G95,J/w
}; {Mx(|)WkL
8K 3dwoT
public static String toString(int algorithm){ M([#Py9h
return name[algorithm-1]; o96C^y{~S
} "W|A^@r}
wVf~FssN
public static void sort(int[] data, int algorithm) { d$dy6{/YD
impl[algorithm-1].sort(data); ahBqYAK9
} x]~TGzS
w0pMH p'Y
public static interface Sort { WyL+HB}
public void sort(int[] data); Fnw:alWr
} Ha'[uEDb
Rj8%% G-pt
public static void swap(int[] data, int i, int j) { .HqFdsm
int temp = data; WjV15\,
data = data[j]; K2
data[j] = temp; 9"[;ld<
} uV/5f#)
} V~J5x >O