[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; Tnoy#w}Ve
} 7&&3@96<*#
int i1=l; tE WolO[\
int i2=mid+1; AjD?_DPc
for(int cur=l;cur<=r;cur++){ ,s`4k?y
if(i1==mid+1) P"f4`q
data[cur]=temp[i2++]; #Oi{7~
else if(i2>r) w8}jmpnI
data[cur]=temp[i1++]; !U=o<)I
else if(temp[i1] data[cur]=temp[i1++]; l/-qVAd!q
else S\L^ZH?[2
data[cur]=temp[i2++]; H/}W_ h^^
} bJoP@s
} U%)-_ *`z
N$N7aE$
} %E2V$l0
bXi(]5
改进后的归并排序: suHisc*
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package org.rut.util.algorithm.support; {uN-bl?o
=z zmz7op
import org.rut.util.algorithm.SortUtil; `Z^\<{z
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/** BU.O[?@64
* @author treeroot :!yPR
* @since 2006-2-2 MO@XbPZB
* @version 1.0 {Y|?~ha#
*/ ,!dVhG#
public class ImprovedMergeSort implements SortUtil.Sort { 3b[.s9Q
K_F"j!0
private static final int THRESHOLD = 10; 'U-8w@\Z
P!dSJ1'oC
/* q.VZP
* (non-Javadoc) gH yJ~
* "0LSy x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?Ta<.j
*/ SZvp%hS0
public void sort(int[] data) { ipyc(u6Z5
int[] temp=new int[data.length]; L)c]i'WZ
mergeSort(data,temp,0,data.length-1); A|YiSwyy
} _*ar\A`
f4Ob4ah!(
private void mergeSort(int[] data, int[] temp, int l, int r) { %UlgG1?A
int i, j, k; 35JVF*z
int mid = (l + r) / 2; A1n4R
if (l == r) _+,>NJ
return; {r%T_BfY
if ((mid - l) >= THRESHOLD) n0Qp:_2z
mergeSort(data, temp, l, mid); &v#pS!UOj
else XT?wCb41R
insertSort(data, l, mid - l + 1); Clb7=@f
if ((r - mid) > THRESHOLD) Nq1YFI>W
mergeSort(data, temp, mid + 1, r); ,P%i%YPj
else KM?w{ ~9
insertSort(data, mid + 1, r - mid); -S#jOr
3_8W5J3I
for (i = l; i <= mid; i++) { Qb|@DMq%
temp = data; .bUj
} YJ|U|[
for (j = 1; j <= r - mid; j++) { p8FXlTk
temp[r - j + 1] = data[j + mid]; D$+g5u)
} 4~1lP&
int a = temp[l]; 6^lix9q7
int b = temp[r]; 0?cJ>)N
for (i = l, j = r, k = l; k <= r; k++) { $,B;\PX
if (a < b) { q07H{{h/B
data[k] = temp[i++]; a"l\_D'.K8
a = temp; yKy )%i
} else { k"|Fu
data[k] = temp[j--]; wI;sZJc
b = temp[j]; qh+&Zx~
} EQ.K+d*K][
} P *&Cght>0
} my0iE:
9N<=,!;5~s
/** 4'TssRot@h
* @param data Lp(i&A
* @param l I4KE@H"%7
* @param i NFF!g]QN
*/ 7'#_uAQR
private void insertSort(int[] data, int start, int len) { R3>c\mA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XRHngW_A
} uPxJwWXO
} `{m,&[n
} %j/pln&
} KcUR /o5K
X]o"4#CQIX
堆排序： %CrTO(
BwrX.!M
package org.rut.util.algorithm.support; n5z|@I`S_
M2\c0^R
import org.rut.util.algorithm.SortUtil; I E{:{b\
^#IE t#
/** Wt=\hixj-
* @author treeroot |AT`(71
* @since 2006-2-2 K>C@oE[W
* @version 1.0 0Y:)$h2?
*/ $ w+.-Tr
public class HeapSort implements SortUtil.Sort{ =sAU5Ag68
GS7'pTsYH
/* (non-Javadoc) :5BCW68le
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |3^U\r^zo
*/ 7dv!
public void sort(int[] data) { fzA Fn$[
MaxHeap h=new MaxHeap(); iXq*EZb"R
h.init(data); *Q)-"]O(k
for(int i=0;i h.remove(); %'X~9Pvi
System.arraycopy(h.queue,1,data,0,data.length); r*dNta<
} Ud7Z7?Ym
PT }J.Dwx
private static class MaxHeap{ @;x*~0GZ
!8D>Bczq)
void init(int[] data){ 7&D)+{g
this.queue=new int[data.length+1]; CO9PQ`9+
for(int i=0;i queue[++size]=data; ?rA3<j
fixUp(size); Eg8b|!-')8
} q6ny2;/r
} Zd88+GS,#
d3Y;BxEz
private int size=0; qWx{eRp d
ve:Oe{Ie{
private int[] queue; 8&nb@l
J_fs}Y1q\
public int get() { Pd-LDs+Ga
return queue[1]; `HO] kJpX
} s 0_*^cZ
; O(Ml}z
public void remove() { bt(Y@3;
SortUtil.swap(queue,1,size--); )EQz9
fixDown(1); v~yw-}fk%
} 'MBXk2?b
file://fixdown w/"vf3}(9
private void fixDown(int k) { \.}ZvM$
int j; %H;}+U]Z
while ((j = k << 1) <= size) { 8a&c=9
if (j < size %26amp;%26amp; queue[j] j++; `6lOqH
if (queue[k]>queue[j]) file://不用交换 K&RIF]0#G
break; 4HR36=E6
SortUtil.swap(queue,j,k); ' Ttsscv
k = j; 3l,-n|x
} *8uS,s6g
} ecQ{ePoU
private void fixUp(int k) { l($8HAJ
while (k > 1) { R\XS5HOE(
int j = k >> 1; P3n#s2o6y
if (queue[j]>queue[k]) )<{u oH
break; .9WOTti
SortUtil.swap(queue,j,k); Bs`{qmbC
k = j; Z4c'1-lh
} /qMnIo
} y:^o._
xm1'
} #"lb9._M
/!^,+
} v+[S${
!>D[Y
SortUtil： c9o]w8p/
\uZ|2WG`
package org.rut.util.algorithm; 8|<</v8i
=[&+R9s
import org.rut.util.algorithm.support.BubbleSort; 6)*B%$?x
import org.rut.util.algorithm.support.HeapSort; _ E-\aS{
import org.rut.util.algorithm.support.ImprovedMergeSort; _)~1'tCs}h
import org.rut.util.algorithm.support.ImprovedQuickSort; qp/1tC`
import org.rut.util.algorithm.support.InsertSort; F_9 4k
import org.rut.util.algorithm.support.MergeSort; k52IvB@2
import org.rut.util.algorithm.support.QuickSort; MmfBFt*
import org.rut.util.algorithm.support.SelectionSort; +3o0GJ
import org.rut.util.algorithm.support.ShellSort; sW'_K.z
[7d(PEQL`
/** *9uNM@7&0
* @author treeroot ^_g%c&H
* @since 2006-2-2 !LM`2|3$
* @version 1.0 M. % p'^5
*/ 4hLk+z<n
public class SortUtil { @/|g|4
public final static int INSERT = 1; <#4""FO*
public final static int BUBBLE = 2; -CuuO=h
public final static int SELECTION = 3; 8)=(eI$
public final static int SHELL = 4; </D.}ia
public final static int QUICK = 5; }Hq3]LVE
public final static int IMPROVED_QUICK = 6; Ez"*',(
public final static int MERGE = 7; Y]KHCY
public final static int IMPROVED_MERGE = 8; `e~i<Pi
public final static int HEAP = 9; n6.Z{Q'b
ZSwuEX
public static void sort(int[] data) { {9-9!jN{"
sort(data, IMPROVED_QUICK); A%?c1`ZxF
} 'I+S5![<
private static String[] name={ 'W4B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r~YBj>}
}; 4H%#Sn#L^!
t!SxJB e
private static Sort[] impl=new Sort[]{ ygj%VG
new InsertSort(), ,zr9*t
new BubbleSort(), :9ia|lN
new SelectionSort(), HR"clD\{Di
new ShellSort(), }/&Zo=Q$
new QuickSort(), :$k1I-^R
new ImprovedQuickSort(), FeMgn`q
new MergeSort(), Sn4xv2/
new ImprovedMergeSort(), Knqv|jJVx1
new HeapSort() JVkuSIR>
}; m$^5{qpg
y0(.6HI
public static String toString(int algorithm){ A{J?I:
return name[algorithm-1]; ^)Awjj9
} Yl>Y.SO
;tVd+[8
public static void sort(int[] data, int algorithm) { r7g@(K
impl[algorithm-1].sort(data); :wXiz`VH
} Yj>4*C9
6H: fg
public static interface Sort { ,b -
public void sort(int[] data); Anu:
} BYMdX J
*#b e
public static void swap(int[] data, int i, int j) { @vyEN.K%mm
int temp = data; -dO8Uis$
data = data[j]; ~!~i_L\V
data[j] = temp; YVa,?&i=N
} "qF/7`e[
} 5I1YB+$}e