[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; =g|FT
} =tY T8Q;al
int i1=l; $ME)#(
int i2=mid+1; IE~ |iQ?-
for(int cur=l;cur<=r;cur++){ 0m ? )ROaJ
if(i1==mid+1) ~Cjn7
data[cur]=temp[i2++]; #e5\j\#.
else if(i2>r) zdH kG_PT
data[cur]=temp[i1++]; &+R?_Ooibk
else if(temp[i1] data[cur]=temp[i1++]; ehY5!D1Q
else Rlirs-WQ
data[cur]=temp[i2++]; I<tm"?q0
} Du){rVY^d
} sx<%2
%~S&AE-
} DlNX 3
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改进后的归并排序: _J[P[(ab
;A!BVq
package org.rut.util.algorithm.support; hR|MEn6KC
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import org.rut.util.algorithm.SortUtil; 8dyg1F
>&k-'`Nw
/** {]|J5Dgfe
* @author treeroot 0SPk|kr
* @since 2006-2-2 dcT80sOC
* @version 1.0 j <RrLn_
*/ G*v,GR
public class ImprovedMergeSort implements SortUtil.Sort { ?0xgRe<
&jr3B;g!C
private static final int THRESHOLD = 10; KY]C6kh
N,U8YO
/* ;jTN| i'
* (non-Javadoc) 9~YMyg(Z
* O|UC ?]6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {FTqu.
*/ nt.y !k
public void sort(int[] data) { /H+a0`/
int[] temp=new int[data.length]; 'A[dCc8O
mergeSort(data,temp,0,data.length-1); M& CqSd
} 4ss4kp_>
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private void mergeSort(int[] data, int[] temp, int l, int r) { ,,|^%Ct']
int i, j, k; ei5~&
int mid = (l + r) / 2; n?K
if (l == r) ^/=KK:n~
return; k-""_WJ~^
if ((mid - l) >= THRESHOLD) 7j)8Djzp|
mergeSort(data, temp, l, mid); NW)1#]gg%
else gv{ >`AN
insertSort(data, l, mid - l + 1); j1HW._G
if ((r - mid) > THRESHOLD) ^y4Z+Gu[
mergeSort(data, temp, mid + 1, r); /|&*QLy
else kz7(Z'pw
insertSort(data, mid + 1, r - mid); 4I5Y,g{6+
Ld-_,-n
for (i = l; i <= mid; i++) { IdxzE_@
temp = data; W'TaBuCb
} pcI uN
for (j = 1; j <= r - mid; j++) { ]"1DGg \A
temp[r - j + 1] = data[j + mid]; 9JKEw
} bK-N:8Z
int a = temp[l]; #yvGK:F
int b = temp[r]; eQvg7aO;
for (i = l, j = r, k = l; k <= r; k++) { -o EW:~y
if (a < b) { 5QO9Q]I#_\
data[k] = temp[i++]; Jqi%|,/]N
a = temp; -C&P%tt Y
} else { vgN&K@hJ
data[k] = temp[j--]; 0'o:#-
b = temp[j]; w"&n?L
} 1ZB"EQ
} FN) $0
} b*Q&CL
GNJj=1Lsd
/** R_S.tT!
* @param data ]:/Q]n^
* @param l 01(AK%e
* @param i *siFj CN<
*/ R,=fv
private void insertSort(int[] data, int start, int len) { iMRwp+$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '(jG[ry&T
} [;myHI`tw
} Nu~lsWyRI5
} % +\."eC
} Hg (Gl
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堆排序： _/<x
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package org.rut.util.algorithm.support; sds"%]rg
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import org.rut.util.algorithm.SortUtil; X+]G-
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/** 8BNi1Qn$
* @author treeroot I ?.^ho
* @since 2006-2-2 LvYB7<zk>
* @version 1.0 m/EFHS49
*/ ?p8_AL'RS
public class HeapSort implements SortUtil.Sort{ J`1rJ
5rZ
/* (non-Javadoc) t}tEvh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G?Hdq;
*/ G9<X_
public void sort(int[] data) { /fV;^=:8c
MaxHeap h=new MaxHeap(); ?#UO./"
h.init(data); OprkR
for(int i=0;i h.remove(); OY@ %p}l
System.arraycopy(h.queue,1,data,0,data.length); vd4ytC
} S#} KIy
)q3p-)@kQ
private static class MaxHeap{ YLn?.sV{[0
Z0r?|G0
void init(int[] data){ i&GH/y
this.queue=new int[data.length+1]; Xh;#
for(int i=0;i queue[++size]=data; %sQ^.` 2
fixUp(size); e6RPIg
} C8i^P}y
} G+\GaY[
*$ %a:q1U
private int size=0; UByv?KZi
cDH^\-z
private int[] queue; qPfQy
8 uwq-/$
public int get() { n^6j9FQ7
return queue[1]; N^:9Fz
} %&t<K3&Yh
x5*!Wx
public void remove() { (qulwOt~w
SortUtil.swap(queue,1,size--); sYf~c0${
fixDown(1); O]1(FWYy
} tT?cBg{
file://fixdown t |A-9^t'!
private void fixDown(int k) { (0y~%J
int j; WlBc.kFck
while ((j = k << 1) <= size) { R`^_(yn>
if (j < size %26amp;%26amp; queue[j] j++; hSyql
if (queue[k]>queue[j]) file://不用交换 #],&>n7'
break; F6flIG&h
SortUtil.swap(queue,j,k); i5,kd~%O
k = j; y>e.~5;
} 6ar
} x39<6_?G
private void fixUp(int k) { ZoZ|Ma
while (k > 1) { 8X)Y^uGGZ
int j = k >> 1; 9o:Lz5o
if (queue[j]>queue[k]) x0w4)Ic5
break; r#]WI|
SortUtil.swap(queue,j,k); $,Yd>%Y
k = j; I,@6J(9
} >>fH{/l
} *N'p~LJ
"d5n \@[t
} OMg<V
>_ 2dvg=U
} MfQ?W`Kop
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SortUtil： v^iL5y!
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package org.rut.util.algorithm; 9.B KI/
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import org.rut.util.algorithm.support.BubbleSort; A`o8'+`C
import org.rut.util.algorithm.support.HeapSort; xLH)P<^`C
import org.rut.util.algorithm.support.ImprovedMergeSort; JQHvz9Yg
import org.rut.util.algorithm.support.ImprovedQuickSort; gi _5?$
import org.rut.util.algorithm.support.InsertSort; ` 3K)GA
import org.rut.util.algorithm.support.MergeSort; EV@X*| w
import org.rut.util.algorithm.support.QuickSort; g0ly
import org.rut.util.algorithm.support.SelectionSort; i3'9>"`
import org.rut.util.algorithm.support.ShellSort; T\>a!
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/** rK]Cr9WM
* @author treeroot H6 HVu |
* @since 2006-2-2 @eIJ]p
* @version 1.0 r/6o \-
*/ _#8RSr8'y
public class SortUtil { Ur=(.%@
public final static int INSERT = 1; 6wECo
public final static int BUBBLE = 2; +8Ymw:D7a
public final static int SELECTION = 3; K':;%~I
public final static int SHELL = 4; o@i#|kx,
public final static int QUICK = 5; 6 EC*
public final static int IMPROVED_QUICK = 6; l(tOe
public final static int MERGE = 7; Z+. '>
public final static int IMPROVED_MERGE = 8; G@jZ)2
public final static int HEAP = 9; :~N-.#
ly_HWuFJ3
public static void sort(int[] data) { 3H6lBF
sort(data, IMPROVED_QUICK); Bj-:#P@
} _k~KZ;l
private static String[] name={ l &5QZI0I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1--C~IjJ+
}; T\j{Bi5 \J
8jo p_PG'
private static Sort[] impl=new Sort[]{ 90*5 5\>{
new InsertSort(), YU5(g^<
new BubbleSort(), J!pygn O
new SelectionSort(), NmJWU:W_@
new ShellSort(), e:n<EnT
new QuickSort(), LKOwxF#TKT
new ImprovedQuickSort(), Rww{:R
new MergeSort(), w\i\Wp,FP
new ImprovedMergeSort(), (w/T-*
new HeapSort() Xe:jAkDp
}; Df<xWd2
(I{rLS!o,L
public static String toString(int algorithm){ K<ft2anY5
return name[algorithm-1]; +kO!Xc%P&
} (UvM@]B
q[W 0 N>
public static void sort(int[] data, int algorithm) { Q&=w_Wc
impl[algorithm-1].sort(data); 4Vi`* !
} 1A G<$d5U|
$ig0j`
public static interface Sort { D"rK(
public void sort(int[] data); T)TfB(
} 8xV9.4S
$r8 ^0ZRr
public static void swap(int[] data, int i, int j) { "(z5{z?S
int temp = data; vyX\'r.~7
data = data[j]; r6} |hpJ8
data[j] = temp; Q)"Nu.m &
} @As[k2
} c[4i9I3v