[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; ]KmYPrCl0
} B4?P"|
int i1=l; K"D9.%7
int i2=mid+1; >_o_&;=`v
for(int cur=l;cur<=r;cur++){ Kt-@a%O0
if(i1==mid+1) <Aa%Uwpc
data[cur]=temp[i2++]; Je'$V%{E
else if(i2>r) KK?}`o
data[cur]=temp[i1++]; ?$?Ni)Z
else if(temp[i1] data[cur]=temp[i1++]; @'QBrE
else "](~VF[J8
data[cur]=temp[i2++]; XxGm,A+>Ty
} bFpwq#PDW>
} rr*IIG&.5
E4{8 $:q=
} a?;{0I:Ln
U*Q$:%72vO
改进后的归并排序: l!b#v`
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package org.rut.util.algorithm.support; nm)F tX|A
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import org.rut.util.algorithm.SortUtil; QxK%ZaFZA
*(rq AB0~
/** SF6n06UZu
* @author treeroot z)ydQw>
* @since 2006-2-2 ms?h/*E<H
* @version 1.0 ~9{.!7KPc
*/ Vrnx#j-U
public class ImprovedMergeSort implements SortUtil.Sort { (efH>oY[
0wx`y$~R
private static final int THRESHOLD = 10; 4x:fOhtP
?h{&
/* ;RR)C@n1
* (non-Javadoc) ;y"DEFs,u
* ykZ)`E]P`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <v\|@@X
*/ Co'dZd(
public void sort(int[] data) { A9"ho}<
int[] temp=new int[data.length]; -kJ`gdS
mergeSort(data,temp,0,data.length-1); 8?PNyO-Wt5
} }&=C*5JN
PKP(:3|
private void mergeSort(int[] data, int[] temp, int l, int r) { xd*kNY
int i, j, k; X0m\
int mid = (l + r) / 2; EfOJ%Xr[,l
if (l == r) 1&dWt_\
return; rIXAn4,dTv
if ((mid - l) >= THRESHOLD) @=$;^}JS|
mergeSort(data, temp, l, mid); VL\6U05Z
else |2mEowAd
insertSort(data, l, mid - l + 1); BM3nZ<%3
if ((r - mid) > THRESHOLD) !Ed';yfz$
mergeSort(data, temp, mid + 1, r); k]v a
else [j5L}e!T
insertSort(data, mid + 1, r - mid); Uu G;z5
N(D_*% 96
for (i = l; i <= mid; i++) { G,J$lTX
temp = data; @Fo0uy\G
} RsE+$
for (j = 1; j <= r - mid; j++) { y'(;!5w
temp[r - j + 1] = data[j + mid]; K\uR=L7
} 6%)dsTAB
int a = temp[l]; !4|7U\;
int b = temp[r]; HH>]"mv
for (i = l, j = r, k = l; k <= r; k++) { /@0wbA
if (a < b) { .6r&<*
data[k] = temp[i++]; U:_&aY_
a = temp; :Bl $c,J
} else { xC|7"N^/
data[k] = temp[j--]; *r%=p/oQ}B
b = temp[j]; |W?x6]~.R
} !?]NMf_
} E}~GXG
} */6PkNq
vrH/Z.WD
/** :Vv=p*~
* @param data 7dAa~!/(
* @param l &QvWT+]c'0
* @param i ^!=+$@<
*/ PQ1\b-I
private void insertSort(int[] data, int start, int len) { .Zo8KwkFY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cd\0
} @;pTQ 5 I
} S/8xo@vct]
} gg933TLu(Q
} xmbkn}@A
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堆排序： }y'KS:Jb
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package org.rut.util.algorithm.support; u"nyx0<
tlc&Wx
import org.rut.util.algorithm.SortUtil; !tN]OQ)'
|XPT2eQ{
/** QH;1*
* @author treeroot ;|66AIwDe
* @since 2006-2-2 s2q#D.f
* @version 1.0 dY|(
*/ lr=*Ty(V
public class HeapSort implements SortUtil.Sort{ DT;Hr4Z8^"
e:&5Cvx
/* (non-Javadoc) {~VgXkjsC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5X'[{'i,
*/ O]`CSTv'_
public void sort(int[] data) { j$BM$q/c
MaxHeap h=new MaxHeap(); F8.Fp[_tM
h.init(data); #TRPq>XzD
for(int i=0;i h.remove(); 7h,SX]4Q
System.arraycopy(h.queue,1,data,0,data.length); %*zgN[/w
} gFJd8#6t
/&a[D2
private static class MaxHeap{ VcA87*pel
YaDr6)
void init(int[] data){ Sky!ZN'I
this.queue=new int[data.length+1]; PO1sVP.S
for(int i=0;i queue[++size]=data; [T.kwQf4$
fixUp(size); D>PB|rS@
} xrS;06$
} ^I@43Jy/
[{L4~(uU8
private int size=0; %3|0_
(Jy7
private int[] queue; /(5SJ(a
?tSFM:9PU
public int get() { ?FxxH*>"
return queue[1]; M5CFW >T
} (ybKACx
bR(rZu5
public void remove() { H4MFTnJ{
SortUtil.swap(queue,1,size--); d?.ewsC
fixDown(1); 8W9kd"=U
} Y 8EL
file://fixdown <T,vIXwu+
private void fixDown(int k) { 0PjWfM8%
int j; \GEFhM4)
while ((j = k << 1) <= size) { -$>R;L
if (j < size %26amp;%26amp; queue[j] j++; LY-fp+
if (queue[k]>queue[j]) file://不用交换 ?l &S:` L
break; p$0G EYwM
SortUtil.swap(queue,j,k); (0bvd
k = j; amK"Z<V F
} TkM8GK-3
} q]DV49UK
private void fixUp(int k) { C5c@@ch :
while (k > 1) { ia?{]!7$
int j = k >> 1; c=0S]_
if (queue[j]>queue[k]) E.R,'Y;x
break; Ivmiz{Oii
SortUtil.swap(queue,j,k); Ys|tGU
k = j; .i) H1sD
} <j+DY@*
} bx#GOK-
/PafIq
} ZBUEg7c
~xerZQgc
} Rt}H.D #
zW+X5yK
SortUtil： m0DD|7}+
%wzDBsX
package org.rut.util.algorithm; _ fJ5z
8M<q-sn4B
import org.rut.util.algorithm.support.BubbleSort; d="Oge8
import org.rut.util.algorithm.support.HeapSort; Dp3&@M"^yY
import org.rut.util.algorithm.support.ImprovedMergeSort; <lopk('7
import org.rut.util.algorithm.support.ImprovedQuickSort; P-o/ax
import org.rut.util.algorithm.support.InsertSort; U-&dn%Sq
import org.rut.util.algorithm.support.MergeSort; o$)pJ#";F
import org.rut.util.algorithm.support.QuickSort; ]%>7OH'
import org.rut.util.algorithm.support.SelectionSort; |qnAqzK|
import org.rut.util.algorithm.support.ShellSort; aAhXHsZ|26
;x^WPYEj
/** .jA'BF.
* @author treeroot ^K. d|z
* @since 2006-2-2 P/6$T2k_
* @version 1.0 I|8'#QX
*/ ^yL6A1
public class SortUtil { 2.)xWCG
public final static int INSERT = 1; c5C 2xE}T
public final static int BUBBLE = 2; 094~ s
public final static int SELECTION = 3; WT;4J<O/
public final static int SHELL = 4; #bc$[%_
public final static int QUICK = 5; W5z<+8R
public final static int IMPROVED_QUICK = 6; / VypN,
public final static int MERGE = 7; t.Q}V5t{g
public final static int IMPROVED_MERGE = 8; {RcmjI7
public final static int HEAP = 9; K9O%SfshF
xVw9_il2a
public static void sort(int[] data) { jGy%O3/
sort(data, IMPROVED_QUICK); cLhHGwX=x
} u5zL;C3O
private static String[] name={ {BPNb{dBKr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?&A)%6` ~
}; w*#B_6bG
HEh,Cf7`'
private static Sort[] impl=new Sort[]{ Se~<Vpo
new InsertSort(), Ck.LsL-
new BubbleSort(), rHYSS0*3
new SelectionSort(), G8AT] =
new ShellSort(), }.*"ezaZw
new QuickSort(), Jy<hTd*q
new ImprovedQuickSort(), oHh~!#u
new MergeSort(), 11Sflj
new ImprovedMergeSort(), m03D+@F
new HeapSort() JV_VF'
}; @N+ }cej
NN>E1d=
public static String toString(int algorithm){ rG[iEY
return name[algorithm-1]; m-T@Og
} >2vUFq`H
QiO4fS'~W
public static void sort(int[] data, int algorithm) { r:N =?X`N
impl[algorithm-1].sort(data); LL% Aw)Q`
} 1'Sr0 oEd3
5\!t!FL_
public static interface Sort { n1!hfu7@s
public void sort(int[] data); NSs"I]
} D/U=zDpiB
q~:H>;:G-
public static void swap(int[] data, int i, int j) { zP554Gr?
int temp = data; oW ! Z=;
data = data[j]; n$Nb,/o
data[j] = temp; z3-A2#c
} <e&88{jJ
} ''D\E6c\