[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; BlQu9{=n
} lH/d#MT
int i1=l; vV:eU-a
int i2=mid+1; k#TonT
for(int cur=l;cur<=r;cur++){ :tY;K2wDM
if(i1==mid+1) yZbO{PMr
data[cur]=temp[i2++]; _NAKVzo-
else if(i2>r) \+mc
data[cur]=temp[i1++]; ;2 oR?COW
else if(temp[i1] data[cur]=temp[i1++]; +2=N#LM
else }3cOZd_,t
data[cur]=temp[i2++]; XCO{}wU)>
} lL~T@+J~
} >h/J{T(P>h
xt@zP)6G
} WR=e$;
;w@PnY
改进后的归并排序: 2-i>ymoOS
8 M3Q8&
package org.rut.util.algorithm.support; ]%m0PU#
2xH9O{
import org.rut.util.algorithm.SortUtil; @a) x^d
T<06y3sN
/** 't \:@-tQ
* @author treeroot .w^M?}dx
* @since 2006-2-2 Bo8+uRF|
* @version 1.0 k6-Q3W[+a
*/ Ub%+8M
public class ImprovedMergeSort implements SortUtil.Sort { dIe-z7x
7Xm7{`jH
private static final int THRESHOLD = 10; EO$_]0yI;_
Fku9hB
/* 9VdVom|e
* (non-Javadoc) d paZ6g
* GEXT8f(7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x(h(a#,r
*/ 8SK}#44Xz
public void sort(int[] data) { q05_5
int[] temp=new int[data.length]; ,T?8??bZ
mergeSort(data,temp,0,data.length-1); cAIMt]_
} :-7`Lfi@%
di}YHMTx
private void mergeSort(int[] data, int[] temp, int l, int r) { FqAW><
int i, j, k; nk9Kq\2f:
int mid = (l + r) / 2; Z{7lyEzBg
if (l == r) gE]) z*tqX
return; x;89lHy@e
if ((mid - l) >= THRESHOLD) n!~mdI&
mergeSort(data, temp, l, mid); 'CsD[<
else ao>bnRXR
insertSort(data, l, mid - l + 1); y-O# +{7
if ((r - mid) > THRESHOLD) C#[YDcp4
mergeSort(data, temp, mid + 1, r); |ZW%+AQ|
else }2-<}m9}
insertSort(data, mid + 1, r - mid); Lc(D2=%
,$@nbS{Q]
for (i = l; i <= mid; i++) { f~-81ctu
temp = data; ZYZQ?FN
} I <`9ANe
for (j = 1; j <= r - mid; j++) { R4GmUCKB=
temp[r - j + 1] = data[j + mid]; mz;S*ONlV
} xnWCio>M
int a = temp[l]; @@K@;Jox
int b = temp[r]; L{(\k$>'
for (i = l, j = r, k = l; k <= r; k++) { ]uO8
if (a < b) { lob{{AB,!
data[k] = temp[i++]; t_5b
a = temp; =A&x d"
} else { 6z@OGExmd#
data[k] = temp[j--]; \)859x&(
b = temp[j]; CPc<!CC
} 4mSL*1j
} tyFhp:ZB
} CLU!/J$!
4Z>hP]7
/** xevG)m
* @param data e_s9E{(
* @param l !U.Xb6
* @param i {bnNY
*/ ?F'gh4
private void insertSort(int[] data, int start, int len) { f)hs>F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^/\OS@CT\
} %\#s@8=2u
} 1><\3+8
} d (]t}
} i>6SY83B}
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堆排序： #+Z3!VS
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package org.rut.util.algorithm.support; iOz<n z
*A}QBZ
import org.rut.util.algorithm.SortUtil; v<iMlOEt
HpXMPHd
/** b<v\
* @author treeroot 32jOs|<\
* @since 2006-2-2 JPL8fX-w
* @version 1.0 f'aQ T
*/ yA_;\\
public class HeapSort implements SortUtil.Sort{ CBdSgHA3>
b9%}<w
/* (non-Javadoc) 3U=q3{%1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,t5X'sY L
*/ {H s""/sb
public void sort(int[] data) { D3Lu]=G
MaxHeap h=new MaxHeap(); EJY[M
h.init(data); WL-+;h@VQ
for(int i=0;i h.remove(); ;AKtbS;H
System.arraycopy(h.queue,1,data,0,data.length); +aRjJ/*
} hH:7
)k0e}
private static class MaxHeap{ hkSpG{;7
s`Fv!
void init(int[] data){ LB%_FT5
this.queue=new int[data.length+1]; , RfU1R
for(int i=0;i queue[++size]=data; vfzGRr
fixUp(size); quk~z};R>\
} ,pir,Eozg
} g6EdCG.V
XPXC7_fV
private int size=0; Malt7M
B#o(21s
private int[] queue; uHBX}WH
8yax.N j
public int get() { C3-l(N1O{
return queue[1]; 3 2Q/4
} _v4TyJ
E>TD`
public void remove() { 8 W8ahG}
SortUtil.swap(queue,1,size--); ` _()R`=
fixDown(1); D2|-\vJ>
} ba|x?kz
file://fixdown o1"U'y-9V
private void fixDown(int k) { eJ)Bs20Q
int j; td4*+)'FY
while ((j = k << 1) <= size) { lJoMJS;S]}
if (j < size %26amp;%26amp; queue[j] j++; VA4vAF
if (queue[k]>queue[j]) file://不用交换 "[@-p
break; cRz7.9-<
SortUtil.swap(queue,j,k); Gh0H) q
k = j; W-=~Afy
} CU6rw+Vax
} Nt67Ye3;
private void fixUp(int k) { f[ GH
while (k > 1) { K]zBPfx
int j = k >> 1; TJ7on.;
if (queue[j]>queue[k]) X;sl?8HG!<
break; E5 H6&XU
SortUtil.swap(queue,j,k); B$g!4C `g
k = j; B:ddlxT$
} 8kAG EiC
} /7|u2!#Ui
&PD4+%!
} jnt0,y A
N<Rb<p%
} Bcrd}'no
N:0/8jmmO
SortUtil： (rt DT
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package org.rut.util.algorithm; Ts0.Ck
B9iH+ ]W
import org.rut.util.algorithm.support.BubbleSort; c;w cgU
import org.rut.util.algorithm.support.HeapSort; t?28s/?
import org.rut.util.algorithm.support.ImprovedMergeSort; }CaL:kY8
import org.rut.util.algorithm.support.ImprovedQuickSort; (Z)
import org.rut.util.algorithm.support.InsertSort; [:a;|t
import org.rut.util.algorithm.support.MergeSort; cG?RisSZ
import org.rut.util.algorithm.support.QuickSort; s ZkQJ->
import org.rut.util.algorithm.support.SelectionSort; &k&tkE
import org.rut.util.algorithm.support.ShellSort; 8_U*_I7(
J\_tigd
/** "FcA:7+
* @author treeroot -{pcb7.xuv
* @since 2006-2-2 ]. 1[H~5N
* @version 1.0 9g"a`a?c
*/ ^ft_1d[
public class SortUtil { Kx*;!3-V$
public final static int INSERT = 1; $&n!j'C:
public final static int BUBBLE = 2; I6YN&9Y
public final static int SELECTION = 3; r4Pm i
public final static int SHELL = 4; @`$8rck`
public final static int QUICK = 5; ~?E x?!\9R
public final static int IMPROVED_QUICK = 6; n0O- Bxhl
public final static int MERGE = 7; p:k>!8.Qho
public final static int IMPROVED_MERGE = 8; GpN tvo~
public final static int HEAP = 9; %l,p />r
B Gh%3"q
public static void sort(int[] data) { l *yml
sort(data, IMPROVED_QUICK); nW{). P
} pHni"iT
private static String[] name={ fseHuL=~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a5?Rj~h!<
}; 3@KX|-
b0tr)>d
private static Sort[] impl=new Sort[]{ q,^^c1f
new InsertSort(), +x-n,!(
new BubbleSort(), 8>T '
new SelectionSort(), /AjGj*O
new ShellSort(), ]|Vm*zO
new QuickSort(), NL0X =i
new ImprovedQuickSort(), cDxjD5E
new MergeSort(), 'd|_i6:y&
new ImprovedMergeSort(), Y=x]'3}^
new HeapSort() )e4nKh],
}; v\c.xtjI5x
}a'8lwF%I
public static String toString(int algorithm){ zRD{"uqi
return name[algorithm-1]; @PU%BKe
} (4>k+ H
g(,gg1mG
public static void sort(int[] data, int algorithm) { z./u;/:
impl[algorithm-1].sort(data); Fj7cI +
} kRTT ~
^$6EO)<
public static interface Sort { lmp0Ye|
public void sort(int[] data); H--(zxK
} c9=;:E
P,j)m\|
public static void swap(int[] data, int i, int j) { W.HM!HQp
int temp = data; U9y[b82
data = data[j]; mPi4.p)
data[j] = temp; >(|T]u](q
} J3oH^
} ,~hvFTJI