[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; .<}(J#vC
} +QT(~<
int i1=l; 6*u#^">,<
int i2=mid+1; o65:)z u
for(int cur=l;cur<=r;cur++){ 3&.?9
if(i1==mid+1) ;|Idg"2
data[cur]=temp[i2++]; TkXD#%nFY
else if(i2>r) Ymkk"y.w
data[cur]=temp[i1++]; &;S.1tg
else if(temp[i1] data[cur]=temp[i1++]; O3WhO@`6)
else pMnkh}Q#
data[cur]=temp[i2++]; 4vKp341B
} `W,gYH7
} aRPgo0,W1
Cg<:C?>!p
} m,NUNd#)\
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改进后的归并排序: )_N|r$i\
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package org.rut.util.algorithm.support; ,Q!sns[T
<;<_f U
import org.rut.util.algorithm.SortUtil; T8+A`z=tSb
Fw? ;Y%
/** 0PO'9#
* @author treeroot 6!7LgM%4
* @since 2006-2-2 sN0S~}F+
* @version 1.0 HEHTj,T
*/ ovJ#2_
public class ImprovedMergeSort implements SortUtil.Sort { pi7Fd\A
Hv2t_QjKT
private static final int THRESHOLD = 10; aZEi|\VU
#ky]@vyO
/* }PdS?[R
* (non-Javadoc) 3`[f<XaL
* pwAawm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'lNy&
*/ QSPneYD
public void sort(int[] data) { ov&4&v
int[] temp=new int[data.length]; rUvjc4O}
mergeSort(data,temp,0,data.length-1); _V\rs{ 5
} G;:n*_QXE
?,~B@Kx
private void mergeSort(int[] data, int[] temp, int l, int r) { R!IODXP=
int i, j, k; 1%~yb Q
int mid = (l + r) / 2; 'F>eieO
if (l == r) ;mH O#
return; (XW\4msB)I
if ((mid - l) >= THRESHOLD) MTJ ."e<B
mergeSort(data, temp, l, mid); P__JN\{9
else Pqiw[+a$
insertSort(data, l, mid - l + 1); ;|_aACina
if ((r - mid) > THRESHOLD) -U/"eVM
mergeSort(data, temp, mid + 1, r); eX7dyM
else v5STe`
insertSort(data, mid + 1, r - mid); _~V7m
y)iT-$bQ
for (i = l; i <= mid; i++) { QHOA__?
temp = data; &4 Py
} zUX%$N+w}>
for (j = 1; j <= r - mid; j++) { R gY-fc0
temp[r - j + 1] = data[j + mid]; '.Iz*%"
} ZC}'! $r7
int a = temp[l]; K;,zE6WD$$
int b = temp[r]; x\taG.'zX
for (i = l, j = r, k = l; k <= r; k++) { m(MPVY<X
if (a < b) { \a\-hm
data[k] = temp[i++]; zbQ-l1E
a = temp; *J^l r"%c
} else { +M4X r*
data[k] = temp[j--]; B#RBR<MFC
b = temp[j]; "|P8L| @*
} V1y"
} =`RogjbP
} eeKErpj8A
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/** ZlaU+Y(_[
* @param data b[5$$_[
* @param l 1Rrp#E}
* @param i !6y<jJ>
*/ tQ!p<Q= $)
private void insertSort(int[] data, int start, int len) { %eJolztKZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JjBG9Rp{
} BET3tiHV
} F3BWi[Xh
} ) 0p9I0=
} b{T". @b
n-X;JYQW
堆排序： IE/F =Wr
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package org.rut.util.algorithm.support; ,3 !D(&
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import org.rut.util.algorithm.SortUtil; %V r vu5
fP|rD[
/** ,'=Tf=wq
* @author treeroot 61qs`N=k
* @since 2006-2-2 <*D{uMw
* @version 1.0 TVaD',5_V%
*/ Af*e:}}
public class HeapSort implements SortUtil.Sort{ eN*=wOh
3O{*~D&n
/* (non-Javadoc) eK<X7m^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a4'KiA2r
*/ SZ/}2_;
public void sort(int[] data) { <5Ft3sd
MaxHeap h=new MaxHeap(); $e(]L(o;
h.init(data); NO(^P+s
for(int i=0;i h.remove(); c!,&]*h"k
System.arraycopy(h.queue,1,data,0,data.length); PKDzIA~T
} jZRf{
>Yr-aDV
private static class MaxHeap{ }>)e~\Tdzb
fW/G_
void init(int[] data){ {VBn@^'s
this.queue=new int[data.length+1]; M84{u!>[
for(int i=0;i queue[++size]=data; "nkj_pC
fixUp(size); 87QK&S\
} j41)X'MgJ
} j`fQN
RK7vR~kf<
private int size=0; s^atBqw,
u%TZ),ny-
private int[] queue; R`IFKmA EJ
[#+yL
public int get() { &m=GkK
return queue[1]; @D?KS;#
} h=:*cqp4
3K8#,TK3
public void remove() { dC&OjBQ
SortUtil.swap(queue,1,size--); ]lT8Z-h@
fixDown(1); 'H19@b5rx
} x.5!F2$
file://fixdown |4$.mb.
private void fixDown(int k) { fGeDygV^`
int j; UN FQ`L
while ((j = k << 1) <= size) { GnX+.uQL|
if (j < size %26amp;%26amp; queue[j] j++; q <, b
if (queue[k]>queue[j]) file://不用交换 I_/E0qSJI
break; 5Kadh2nz
SortUtil.swap(queue,j,k); `u<\ 4&W
k = j; w5C$39e\G
} eD(;Wn
} $ \yZ;Z:
private void fixUp(int k) { &["s/!O1R
while (k > 1) { b7^Db6qu
int j = k >> 1; %9q]
if (queue[j]>queue[k]) 0[# zn
break; 8vp*U
SortUtil.swap(queue,j,k); EZ"n3#/
k = j; 1Fg*--8[r
} {h}0"5
} v)f;dq^z-
8[k:FGp>
} .jXD0~N8q
bwC~
} /wR,P
$_ BoG
SortUtil： 8t)?$j$
#VvU8"u
package org.rut.util.algorithm; |3bCq(ZR\P
r6b;v2!8
import org.rut.util.algorithm.support.BubbleSort; |zkZF|-
import org.rut.util.algorithm.support.HeapSort; 'vX:)ZDi
import org.rut.util.algorithm.support.ImprovedMergeSort; L0Ycf|[s,
import org.rut.util.algorithm.support.ImprovedQuickSort; {vhP'!a6W
import org.rut.util.algorithm.support.InsertSort; t@;r~Sb
import org.rut.util.algorithm.support.MergeSort; N^TE ;BM
import org.rut.util.algorithm.support.QuickSort; LmZ"_
import org.rut.util.algorithm.support.SelectionSort; $(r/N"6)O2
import org.rut.util.algorithm.support.ShellSort; sGp]jqX2,m
W>o>Y$H
/** zR!p-7_w
* @author treeroot 2.2G79U,
* @since 2006-2-2 tkX?iqKQ
* @version 1.0 E*Z# fa
*/ 4G_At
public class SortUtil { 9 WO|g[Y3
public final static int INSERT = 1; \3WQ<t)W
public final static int BUBBLE = 2; %B~@wcI)W
public final static int SELECTION = 3; &cSZ?0R
public final static int SHELL = 4; PC<[$~
public final static int QUICK = 5; VR XK/dZ
public final static int IMPROVED_QUICK = 6; ^2a63_
public final static int MERGE = 7; 8W2oGL6
public final static int IMPROVED_MERGE = 8; P#l"`C /
public final static int HEAP = 9; T^DJ/uhd
Fl}{"eCF8
public static void sort(int[] data) { )gHfbUYS
sort(data, IMPROVED_QUICK); ;i,3KJ[L
} #8/pYQ;
private static String[] name={ $.F.xYS9IJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2r"J"C
}; UJiy]y
AF\gB2^
private static Sort[] impl=new Sort[]{ $1uT`>%
new InsertSort(), ~zYk,;m
new BubbleSort(), oe*CZ
new SelectionSort(), ?`/DFI'_G
new ShellSort(), @h,3"2W{Ev
new QuickSort(), _J X>#h
new ImprovedQuickSort(), FaLc*CU
new MergeSort(), cd(YH! 3
new ImprovedMergeSort(), gVI{eoJ
new HeapSort() /^sk y!
}; tUk)S
[?55vYt
public static String toString(int algorithm){ e0ULr!p
return name[algorithm-1]; /liZ|K3A
} lw43|_'G-t
*t300`x
public static void sort(int[] data, int algorithm) { %+iAL<S
impl[algorithm-1].sort(data); ;~GBD]
} X$*]$Ge>
57Bxx__S4`
public static interface Sort { 9/h[(qvT
public void sort(int[] data); 9~{,Hj1xE
} w/e?K4
d*_rJE}B
public static void swap(int[] data, int i, int j) { PYiO l
int temp = data; DJb9] ,=a
data = data[j]; j@R"AP}
data[j] = temp; C@WdPjxj
} xri(j,mU
} PsM8J