[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; C1|e1
} LlRvm/
int i1=l; /,/T{V[
int i2=mid+1; u|WX?@\
for(int cur=l;cur<=r;cur++){ p2!x8`IB*
if(i1==mid+1) FI*.2rdSR
data[cur]=temp[i2++]; H<%7aOwO2
else if(i2>r) iyu%o9_0
data[cur]=temp[i1++]; phbdV8$L
else if(temp[i1] data[cur]=temp[i1++]; Nb#E+\q
else )(\5Wk9(
data[cur]=temp[i2++]; gUL`)t\}*
} 8:$kFy\A'
} {.H}+@0
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} p."pI Bd
)+oDa{dZ
改进后的归并排序: ?O\n!c
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package org.rut.util.algorithm.support; F]z xx
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import org.rut.util.algorithm.SortUtil; MrLDe{^C2
mmTc.xh
/** r&1N8o
* @author treeroot }.o rfW
* @since 2006-2-2 JF%+T yMe
* @version 1.0 \[]36|$LS
*/ WsJ3zZc
public class ImprovedMergeSort implements SortUtil.Sort { 6g@j,iFy
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private static final int THRESHOLD = 10; x~j%
4eBM/i
/* "]*0)h_
* (non-Javadoc) A37Z;/H~k
* WSi Utf|g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pL.r 9T.
*/ sA3 4`ZAa
public void sort(int[] data) { f*1.Vg0`-
int[] temp=new int[data.length]; 7I^(vQ
mergeSort(data,temp,0,data.length-1); x?va26FV
} w;}P<K
Rw^4S@~T
private void mergeSort(int[] data, int[] temp, int l, int r) { 2P!Pbl<
int i, j, k; Xy_+L_h^
int mid = (l + r) / 2; iW-w?!>|m
if (l == r) ="d}:Jl
return; 3)atqM)i
if ((mid - l) >= THRESHOLD) =MB[v/M59w
mergeSort(data, temp, l, mid); oSx]wZZ
else 6Nj\N oS
insertSort(data, l, mid - l + 1); Rzj5B\+Rk(
if ((r - mid) > THRESHOLD) 5mnIQ~psR
mergeSort(data, temp, mid + 1, r); xo6-Y=c8
else 'F5&f9A
insertSort(data, mid + 1, r - mid); rzLpVpTaz
-+Kx^V#'R
for (i = l; i <= mid; i++) { LUHj3H
temp = data; (](:0H
} 9p+DAs{i
for (j = 1; j <= r - mid; j++) { Br`Xw^S
temp[r - j + 1] = data[j + mid]; n0>#?ek12
} i0v;mc
int a = temp[l]; b5No>U) /
int b = temp[r]; 2?z3s|+[
for (i = l, j = r, k = l; k <= r; k++) { U$# ?Lw
if (a < b) { `rbTB3?
data[k] = temp[i++]; VI74{='=
a = temp; Ldf<
} else { w;&J._J
data[k] = temp[j--]; =n cu#T]
b = temp[j]; }XX)U_x
} aiF7\^aw$
} i!*w'[G->Y
} Uk`ym
)c^Rc9e/
/** /[q6"R!uMz
* @param data K#%L6=t$<
* @param l r.lH@}i%n
* @param i Dwj!B;AZ_
*/ *l)_&p
private void insertSort(int[] data, int start, int len) { po4seW!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %nSm 32/t3
} MT[V1I{LV
} P6u9Ngay
} ^vn8s~#
} s{(aW5$!s
sX.L
堆排序： -y5^xR
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package org.rut.util.algorithm.support; !trt]?*-
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import org.rut.util.algorithm.SortUtil; :1^ R$0d
r{!]` '8
/** Dq/_^a/1
* @author treeroot $sTbFY
* @since 2006-2-2 Dt%Gv0
* @version 1.0 'W(+rTFf!
*/ k|k
public class HeapSort implements SortUtil.Sort{ ea kj>7\s
;IZ*o<_
/* (non-Javadoc) =iW!Mq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2BZYC5jy
*/ 9^6E>S{=
public void sort(int[] data) { s6bILz-u
MaxHeap h=new MaxHeap(); *1"xvle
h.init(data); |5oK04<
for(int i=0;i h.remove(); #?\$*@O
System.arraycopy(h.queue,1,data,0,data.length); H.*:+
} >L\$
)9I>y2WU~
private static class MaxHeap{ I@Pp[AyG
6_]-&&Nr
void init(int[] data){ s~ ||Vv!
this.queue=new int[data.length+1]; "O{j}QwY
for(int i=0;i queue[++size]=data; ]L+YnZ?6
fixUp(size); HK&Ul=^VN|
} ~QgyhJM_h=
} +Ysm6n '
+`tl<rg;
private int size=0; 2;Vss<hR4A
5.m&93P
private int[] queue; 5&?[Vt
;;e\"%}@=q
public int get() { '!eg9}<
return queue[1]; Tzr_K
} gZA[Sq
1(%9)).K
public void remove() { o>WB,i^G
SortUtil.swap(queue,1,size--); 9{[I|
fixDown(1); ffoL]u\
} ,LI$=lJ@
file://fixdown w-iu/|}
private void fixDown(int k) { mm}y/dO~}
int j; O[}{$NXw
while ((j = k << 1) <= size) { 7egE."
if (j < size %26amp;%26amp; queue[j] j++; ?,s]5
if (queue[k]>queue[j]) file://不用交换 q4u,pm,@
break; :j(e+A1@
SortUtil.swap(queue,j,k); o>|&k]W/
k = j; =MR.*m{
} YcQ$nZAU
} #(@!:f1
private void fixUp(int k) { bn7"!6
while (k > 1) { hcn$uyP
int j = k >> 1; /x%h@Cn!
if (queue[j]>queue[k]) -e_91WI
break; r]q;>\T'
SortUtil.swap(queue,j,k); ~[8n+p+&X
k = j; zM+4<k_dH]
} 0gRj3al(
} 7gWT[
vCvjb\S
} Wd`*<+t]
Borr
} } 6 ,m2u
zH"a>+st=
SortUtil： 2[!3!@.
9Lus,l\
package org.rut.util.algorithm; n?KhBJx 4
dU}Cb?]7s
import org.rut.util.algorithm.support.BubbleSort; n!aA<
import org.rut.util.algorithm.support.HeapSort; YD3jP}Ym
import org.rut.util.algorithm.support.ImprovedMergeSort; =Bg $OX
import org.rut.util.algorithm.support.ImprovedQuickSort; s5bqS'%
import org.rut.util.algorithm.support.InsertSort; --fRhN>
import org.rut.util.algorithm.support.MergeSort; awXK9}.
import org.rut.util.algorithm.support.QuickSort; nxWm
import org.rut.util.algorithm.support.SelectionSort; A%[e<vj9
import org.rut.util.algorithm.support.ShellSort; QdIx@[+WOq
eA{nwtN
/** zif&;)wV/
* @author treeroot nND; lVQSO
* @since 2006-2-2 @m5c<(bkfp
* @version 1.0 vjL +fH<0:
*/ |}7!'f\M
public class SortUtil { lw]uH<v
public final static int INSERT = 1; +>&i]x(b
public final static int BUBBLE = 2; +\doF
public final static int SELECTION = 3; z''ejq
public final static int SHELL = 4; nTtE+~u
public final static int QUICK = 5; ,i jB3J
public final static int IMPROVED_QUICK = 6; /[=Yv!
public final static int MERGE = 7; eRqPZb"6MR
public final static int IMPROVED_MERGE = 8; DPlDuUOd
public final static int HEAP = 9; O#<F"e;$
Gx7bV}&PN
public static void sort(int[] data) { M}! qH.W
sort(data, IMPROVED_QUICK); S:K$fFcJ
} {wDq*va
private static String[] name={ ew \WV"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ECyG$j0
}; F pT$D
pO/vD~C>
private static Sort[] impl=new Sort[]{ VA>0Y
new InsertSort(), k|czQ"vaI
new BubbleSort(), dB)-qL8,2
new SelectionSort(), yH(3 m#
new ShellSort(), ~,_@|,)
new QuickSort(), NEUr w/
new ImprovedQuickSort(), VKtlAfXy~
new MergeSort(), !4a#);`G
new ImprovedMergeSort(), p"FWAC!
new HeapSort() 67;6nXG0K
}; A^E 6)A=
d A'0'M
public static String toString(int algorithm){ B^!-%_q
return name[algorithm-1]; F( 4Ue6R
} x=Aq5*A0
<-mhz`^
public static void sort(int[] data, int algorithm) { (j~T7og
impl[algorithm-1].sort(data); 2FW"uYA;6
} ]WzeJ"r {3
a)4%sX*I
public static interface Sort { v8WT?%
public void sort(int[] data); #K`0b$
} =]5f\f6
Q_Br{ `c
public static void swap(int[] data, int i, int j) { OTGy[jY"
int temp = data; ubZJUm
data = data[j]; w=CzPNRHH!
data[j] = temp; Y]_$+Si:NK
} D66NF;7q
} d&+0JI<