[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; *(>,\8OVf
} b)1v:X4Bv=
int i1=l; F\G-. 1
int i2=mid+1; HZDeQx`*s
for(int cur=l;cur<=r;cur++){ +thkx$o
if(i1==mid+1) $/p/9 -
data[cur]=temp[i2++]; k~,({T<
else if(i2>r) ! O~:
data[cur]=temp[i1++]; 2/ES.>K!.
else if(temp[i1] data[cur]=temp[i1++]; <RaM@E
else ZJ Ke}F`l
data[cur]=temp[i2++]; ?n0Z4 8%
} l1?$quM^V
} b2<((H
P56B~M_
} *@1(!A
<QcQ.b
改进后的归并排序: .nG14i7C
6J""gyK.
package org.rut.util.algorithm.support; v%2@M
+ <4gJoI
import org.rut.util.algorithm.SortUtil; g,61'5\
:kb2v1{\
/** 4[VW~x07
* @author treeroot Pn|;VCh
* @since 2006-2-2 :{Mr~Co*
* @version 1.0 ,^K}_z\9f
*/ )A1u uW (
public class ImprovedMergeSort implements SortUtil.Sort { ??u*qO:p
](2\w9i%
private static final int THRESHOLD = 10; L)qDtXd4
$]`rWSYtv`
/* yPXa
* (non-Javadoc) K}j["p<!
* \a7caT{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B}U:c]
*/ P1u(0t
public void sort(int[] data) { 5HqvSfq>?
int[] temp=new int[data.length]; !CGpE=V
mergeSort(data,temp,0,data.length-1); hzcSKRm
} FJCLK#-
m*f"Y"B.1I
private void mergeSort(int[] data, int[] temp, int l, int r) { .X](B~\!
int i, j, k; uG){0%nX
int mid = (l + r) / 2; qOs'Ljx6l
if (l == r) \Aq$h:<
return; fuQk}OW{
if ((mid - l) >= THRESHOLD) dMlJ2\]u
mergeSort(data, temp, l, mid); vXLGdv::
else ;ZtN9l
insertSort(data, l, mid - l + 1); ^(+@uuBx
if ((r - mid) > THRESHOLD) /:.p{y
mergeSort(data, temp, mid + 1, r); 8quH#IhB
else #Y%(CI
insertSort(data, mid + 1, r - mid); ?[!_f$50]P
y)K!l:X
for (i = l; i <= mid; i++) { f>zd,|)At
temp = data; P|tNmv[;
} 3'zL,WW
for (j = 1; j <= r - mid; j++) { /)*si
temp[r - j + 1] = data[j + mid]; !~_6S*~
} i*jnC>
int a = temp[l]; Min{&?a
int b = temp[r]; "%rzL.</
for (i = l, j = r, k = l; k <= r; k++) { m88(f2Ch
if (a < b) { 8I]rC<O6:
data[k] = temp[i++]; VoC|z Rd_
a = temp; 6c[Slq!KA
} else { ZU68\cL
data[k] = temp[j--]; Q79WGW
b = temp[j]; &ev#C%Nu
} CsX@u#
} @QfbIP9
} #9rCF 3P
#B6$r/%
/** +#Ga}eCM
* @param data KSve_CBOh
* @param l 6ee1^>
* @param i 2UeK%-~W?
*/ Xk?Y
private void insertSort(int[] data, int start, int len) { XYze*8xUb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j*_>/gi
} q"-+`;^7(-
} U]PsL3:
} kIJ=]wU|v
} _T(77KLn;
b>@fHmpwD
堆排序： #:E^($v
x }.&?m
package org.rut.util.algorithm.support; Ch'e'EmI
]vjMfT%]W
import org.rut.util.algorithm.SortUtil; 4&<zkAMR
*],=!
/** V(=3K"j
* @author treeroot R,+"^:}
* @since 2006-2-2 'NN3XyD
* @version 1.0 xzb{g,c
*/ nkkUby9
public class HeapSort implements SortUtil.Sort{ c?}{>ig/)
7b*9 Th*a
/* (non-Javadoc) IN=l|Q$8f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IXU~&5&J
*/ }+fBJ$
public void sort(int[] data) { ,T8fo\a4
MaxHeap h=new MaxHeap(); ow7*HN*
h.init(data); c8oE,-~
for(int i=0;i h.remove(); +:3p*x%1H
System.arraycopy(h.queue,1,data,0,data.length); )VeeAu)p
} 5 J 7XVe>
BYZllwxwTE
private static class MaxHeap{ @N6KZn|R
nnuJY$O;M
void init(int[] data){ |k<5yj4?
this.queue=new int[data.length+1]; ~EO=;a_
for(int i=0;i queue[++size]=data; ge[&og/$
fixUp(size); 97n,^t2F\
} <ahcE1h
} ZW ZKyJQ
^)1!TewCY
private int size=0; h{CMPJjD
8nTdZu
private int[] queue; N6h.zl&04
*lyRy/POB
public int get() { y<^hM6S?Z
return queue[1]; i)[~]D.EH8
} QuBaG<
/'L/O;H20
public void remove() { X({R+
SortUtil.swap(queue,1,size--); /H$/s=YU\U
fixDown(1); Bw4PxJs-
} vJg^uf)
file://fixdown ,a\pdEPj
private void fixDown(int k) { ee*E:Ltz\
int j; k-8$43
while ((j = k << 1) <= size) { WO+_|*&
if (j < size %26amp;%26amp; queue[j] j++; 4p]hY!7
if (queue[k]>queue[j]) file://不用交换 x<>In"QV
break; /S`d?AV
SortUtil.swap(queue,j,k); e[%g'}D:-
k = j; Ew2ksZ>B]&
} J72YZrc
} o%l|16DR
private void fixUp(int k) { }>?"bcJ
while (k > 1) { k2DBm q;
int j = k >> 1; |\/V1
if (queue[j]>queue[k]) !z_VwZ#,
break; 5uD'Kd$H
SortUtil.swap(queue,j,k); J-Wphc!m
k = j; 3ms{gZbw
} !;.nL-NQ
} xmwH~UWp
IfpFsq:
} K ZQ `
Hv .C5mo
} z/t+t_y
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SortUtil： QE~#eo
wIK&EGQ
package org.rut.util.algorithm; [ FNA:
`YPNVm<3)
import org.rut.util.algorithm.support.BubbleSort; =xPBolxm5U
import org.rut.util.algorithm.support.HeapSort; Y 9~z7
import org.rut.util.algorithm.support.ImprovedMergeSort; usOIbrQ
import org.rut.util.algorithm.support.ImprovedQuickSort; S<DS|qOo
import org.rut.util.algorithm.support.InsertSort; >TwL&la
import org.rut.util.algorithm.support.MergeSort; v1~`76^
import org.rut.util.algorithm.support.QuickSort; Oxr?y8C~
import org.rut.util.algorithm.support.SelectionSort; )Tj\ym-Vl
import org.rut.util.algorithm.support.ShellSort; J2Eb"y>/;
Pt8 U0)i)
/** 'E~[I"0
* @author treeroot a[Oi
* @since 2006-2-2 X5wYfN
* @version 1.0 roE*8:Y
*/ AE&IN.-
public class SortUtil { }|4dEao\
public final static int INSERT = 1; AV^Sla7|_
public final static int BUBBLE = 2; ^n8r mh_%
public final static int SELECTION = 3; NRZ>03w
public final static int SHELL = 4; 3qBZzM O*
public final static int QUICK = 5; VU 8~hF
public final static int IMPROVED_QUICK = 6; %)G]rta#
public final static int MERGE = 7; i*Ee(m]I
public final static int IMPROVED_MERGE = 8; 9UeK}Rl^n
public final static int HEAP = 9; |\S p IFH1
f iu?mb=*
public static void sort(int[] data) { Vq1ve;(8s
sort(data, IMPROVED_QUICK); kc-v(WIC
} G9P)Y#WB
private static String[] name={ nK5FPFz8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &[4lP~
}; Z}4 `y"By
4O** %!|
private static Sort[] impl=new Sort[]{ :,BKB*a\
new InsertSort(), l*z.20^P
new BubbleSort(), >6"u{Qmr
new SelectionSort(), q$6Tb
new ShellSort(), -P|st;?#
new QuickSort(), WZJ}HHePr
new ImprovedQuickSort(), I:G4i}mA
new MergeSort(), L/n?1'he
new ImprovedMergeSort(), U>s$}Y:+Z
new HeapSort() FZ^j|2.L*
}; yZ]u{LJS
JJ$q*
public static String toString(int algorithm){ 9Lv"|S`5W_
return name[algorithm-1]; $C8nPl' 7
} Wa+q[E
V_Oj?MMpn
public static void sort(int[] data, int algorithm) { >gFEA0-
impl[algorithm-1].sort(data); smN|r
} MUfhk)"
@>sZ'M2mq
public static interface Sort { 1O,<JrE+-
public void sort(int[] data); V,qc[*_3
} jjrhl
y,QJy=?
public static void swap(int[] data, int i, int j) { wio}<Y6Xz
int temp = data; _]# ^2S
data = data[j]; o0'!u
data[j] = temp; Au-h#YV
} WVfwt.Y
} H~Fb=.h]U