[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; G1SOvdq
} ~qE:Nz0@
int i1=l; "Qk)EY
int i2=mid+1; "!#KQ''R
for(int cur=l;cur<=r;cur++){ e=ry_@7
if(i1==mid+1) g]?QV2bX6
data[cur]=temp[i2++]; !3ji]q;uF
else if(i2>r) LO,:k+&A+
data[cur]=temp[i1++]; 4@jX{{^6%
else if(temp[i1] data[cur]=temp[i1++]; }(#;{_
else k P=~L=cK
data[cur]=temp[i2++]; cZ,}1?!
} iG{xDj{CKv
} M?qvI
"i\^GK=
} !!)NER-dv
?V =#x.9
改进后的归并排序: riSgb=7q9
T=[/x=
package org.rut.util.algorithm.support; 50Ov>(f@7
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import org.rut.util.algorithm.SortUtil; % 3<7HY]~
nx5I
/** +o K*5 Y
* @author treeroot rotu#?B
* @since 2006-2-2 %vRCs]
* @version 1.0 dM;v39
*/ 4 udW6U
public class ImprovedMergeSort implements SortUtil.Sort { rouaT
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private static final int THRESHOLD = 10; ,b t j6hg
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/* x-~=@oiv
* (non-Javadoc) ~L"?C
* SL`nt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bg^<e}{<H
*/ !d1a9los
public void sort(int[] data) { r"`7ezun:
int[] temp=new int[data.length]; QVkrhwp
mergeSort(data,temp,0,data.length-1); A(+%DZ
} CsN^u H
a:F\4x=
private void mergeSort(int[] data, int[] temp, int l, int r) { /])P{"v$^
int i, j, k; )D&xyC}
int mid = (l + r) / 2; H'&[kgnQ@
if (l == r) rbrh;\<jM
return; ~re~Ys
if ((mid - l) >= THRESHOLD) #g<6ISuf
mergeSort(data, temp, l, mid); +tJ 7ZR%
else XfN(7d0
insertSort(data, l, mid - l + 1); 9A *gW j
if ((r - mid) > THRESHOLD) l_Zx'm
mergeSort(data, temp, mid + 1, r); x kdC-S
else "6Z(0 iu:{
insertSort(data, mid + 1, r - mid); P=Su)c
M[(pLYq:
for (i = l; i <= mid; i++) { `Ay:;I
temp = data; ]88qjKL
} %a!gN
for (j = 1; j <= r - mid; j++) { IRTD(7"oyp
temp[r - j + 1] = data[j + mid]; ;3o7>yEv
} DKF '*
int a = temp[l]; w1eFm:'
int b = temp[r]; *q+X?3
for (i = l, j = r, k = l; k <= r; k++) { G=|~SYz
if (a < b) { ilAhw4A
data[k] = temp[i++]; 3cF8DNh
a = temp; %< `D'V@
} else { M~~)tJYsu
data[k] = temp[j--]; 9*r^1PRc
b = temp[j]; |#'n VN.;
} :[7O=[pk
} _<=h#lH
} =}.gU WV
[v\m)5
/** '.k'*=cq0
* @param data c3r`T{Kf
* @param l b`@J"E}
* @param i iu3L9UfL[
*/ m.<u!MI
private void insertSort(int[] data, int start, int len) { pTXF^:8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gtePo[ZH.P
} W1EYVXN
} 3#Bb4\_v
} 8:>V'j
} $sS~hy*
DTSf[zP/
堆排序： T5z]=Pd"^
72 |O&`O
package org.rut.util.algorithm.support; >H ?k0M`L
~9E_L?TW*
import org.rut.util.algorithm.SortUtil; &} { #g
/(.:l +[w[
/** LD1&8kJ*l
* @author treeroot )Yv=:+f
* @since 2006-2-2 ?^W1WEBm
* @version 1.0 1GqSY|FSGp
*/ B(ktIy
public class HeapSort implements SortUtil.Sort{ *UJ4\
om2N*W.gk
/* (non-Javadoc) %S'+x[4W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n,2
*/ ixSr*+
public void sort(int[] data) { y^ |u'XK
MaxHeap h=new MaxHeap(); D}LM(s3li7
h.init(data); gWzslgO6
for(int i=0;i h.remove(); U3Z=X TB
System.arraycopy(h.queue,1,data,0,data.length); 8-Y*b89
} 0%dOi ko
tH44\~
private static class MaxHeap{ }\Rmwm-
fBj)HoHQW
void init(int[] data){ f&mi nBU
this.queue=new int[data.length+1]; t>/x-{bH\
for(int i=0;i queue[++size]=data; d?T!)w
fixUp(size); . ump? M
} oJ\g0|\qwe
} f?51sr
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private int size=0; )c{>@WM~
8hD[z}
private int[] queue; fg3Jv*
Z|%h-~
public int get() { >Vjn]V5y
return queue[1]; _eOC,J<-~
} HFZ'xp|3dn
oDMPYkpTu
public void remove() { o+'|j#P
SortUtil.swap(queue,1,size--); VMRfDaO9
fixDown(1); <D~hhGb
} $3G^}A"
file://fixdown e,/]]E/o
private void fixDown(int k) { >kK@tJn
int j; _&BK4?H@b
while ((j = k << 1) <= size) { 3HpqMz
if (j < size %26amp;%26amp; queue[j] j++; ]s AuL!
if (queue[k]>queue[j]) file://不用交换 Lo{wTYt:J
break; %m\:AK[}
SortUtil.swap(queue,j,k); TA-2{=8
k = j; 1>j,v+
} k`8O/J
} LSou]{R
private void fixUp(int k) { p%>sc
while (k > 1) { Wvf>5g)?
int j = k >> 1; 6r<a
if (queue[j]>queue[k]) V%r`v%ktF
break; x2"1,1%H7
SortUtil.swap(queue,j,k); x?{UWh%
k = j; +ig%_QED[\
} :^3)[.m
} dDpAS#'s\
|6JKB'
} QIGUi,R
l5{60$g
} TjTG+uQ
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SortUtil： U]sAYp^$
z}!g2d
package org.rut.util.algorithm; iAu/t
5;/n`Bd
import org.rut.util.algorithm.support.BubbleSort; !Zj]0,^
import org.rut.util.algorithm.support.HeapSort; .P)lQk\
import org.rut.util.algorithm.support.ImprovedMergeSort; \Mg_Q$
import org.rut.util.algorithm.support.ImprovedQuickSort; 8@m$(I+
import org.rut.util.algorithm.support.InsertSort; U|} ?{x
import org.rut.util.algorithm.support.MergeSort; 4`5yrCd
import org.rut.util.algorithm.support.QuickSort; ^z{szy?Fg
import org.rut.util.algorithm.support.SelectionSort; :25LQf^nz
import org.rut.util.algorithm.support.ShellSort; 7&ED>Bk
9=>fx
/** LORcf1X/
* @author treeroot k8w\d+!v
* @since 2006-2-2 T$%|=gq
* @version 1.0 WTfjn|a
*/ rm[C{Pn
public class SortUtil { U g"W6`
public final static int INSERT = 1; pZnp!!G
public final static int BUBBLE = 2; Tlw'05\{J
public final static int SELECTION = 3; h@Q^&%w
public final static int SHELL = 4; :>1nkm&Eg
public final static int QUICK = 5; MVYd\)\o
public final static int IMPROVED_QUICK = 6; YMX9Z||
public final static int MERGE = 7; Nc:s+ o
public final static int IMPROVED_MERGE = 8; .Kb3VNgwvm
public final static int HEAP = 9; L'= \|r
RxP H[7oZ
public static void sort(int[] data) { -'&/7e6>y
sort(data, IMPROVED_QUICK); %j7b0pb
} za_b jE
private static String[] name={ 3z8i0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +hyOc|5
}; ~non_pJ
EgjJywNhd2
private static Sort[] impl=new Sort[]{ &`r/+B_W
new InsertSort(), jf9+H!?^N
new BubbleSort(), 0,%{r.\S
new SelectionSort(), P%3pM*.
new ShellSort(), -YA,Stc-
new QuickSort(), 6mM9p)"$
new ImprovedQuickSort(), [X(4( 1i
new MergeSort(), b#VtPn]
new ImprovedMergeSort(), R;< q<i_l
new HeapSort() =oBpS=<7
}; /(dP)ysc
'75T2Ud
public static String toString(int algorithm){ w#"\*SKK
return name[algorithm-1]; idI w7hi4
} Vj*-E
kKX' Y+
public static void sort(int[] data, int algorithm) { zxyl+tU &
impl[algorithm-1].sort(data); )Qbd/zd\U
} oZ'a}kF
:{7+[LcH7
public static interface Sort { W2vL<
public void sort(int[] data); 7Uenr9)M
} 28MMH Q
lTx_E#^s
public static void swap(int[] data, int i, int j) { *6Wiq5M>.
int temp = data; B8@mL-Z-;
data = data[j]; ^? fOccfQ{
data[j] = temp; fUT[tkb/!
} - x
} ai!u+L