[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; `Njv#K} U
} !Jw
int i1=l; Yz0ruhEMk
int i2=mid+1; !Re/W ykY
for(int cur=l;cur<=r;cur++){ ,>n 4 `A
if(i1==mid+1) N0h"EV[
data[cur]=temp[i2++]; q#-szZQ
else if(i2>r) \.A~>=:
data[cur]=temp[i1++]; R/M:~h~F!
else if(temp[i1] data[cur]=temp[i1++]; ur-&- G^
else BlS0I%SN
data[cur]=temp[i2++]; @4m_\]Wy
} nJF"[w,?
} :2?J#/o
inavi5.
} 9)Y]05us
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改进后的归并排序: L=Q-r[
9}Tf9>qP>M
package org.rut.util.algorithm.support; '2a}1?
o_p//S#q
import org.rut.util.algorithm.SortUtil; qn#\ro1H
_JA.~edqM
/** \Nu(+G?e
* @author treeroot |<\LB
* @since 2006-2-2 KUVsCmiT
* @version 1.0 gEtDqq~y@
*/ "xlf6pm%
public class ImprovedMergeSort implements SortUtil.Sort { uAR!JJ
!mrB+<:
private static final int THRESHOLD = 10; ~wIVw}
ehI*cf({
/* B2%)G$B
* (non-Javadoc) ;uNcrv0J
* GWgjbp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4_J* 0=U
*/ M ]W'>g)G
public void sort(int[] data) { ;"\e aKl
int[] temp=new int[data.length]; 0ANqEQX
mergeSort(data,temp,0,data.length-1); WEUr;f
} |Sy|E
J[;c}
private void mergeSort(int[] data, int[] temp, int l, int r) { FGBPhH% (8
int i, j, k; gk~.u
int mid = (l + r) / 2; V^=z\wBZ
if (l == r) U?d1
return; za'Eom-<u
if ((mid - l) >= THRESHOLD) 7rc^-!k
mergeSort(data, temp, l, mid); `h(JD$w
else dC_L~ }=
insertSort(data, l, mid - l + 1); 'Zf_/y
if ((r - mid) > THRESHOLD) e|+U7=CK
mergeSort(data, temp, mid + 1, r); ;Aiuy{<
else |x2>F
insertSort(data, mid + 1, r - mid); 0]{h,W3]@[
@"-<m|lM
for (i = l; i <= mid; i++) { %xf6U>T
temp = data; ox] LlRK
} too=+'<N</
for (j = 1; j <= r - mid; j++) { ~d ~$fR
temp[r - j + 1] = data[j + mid]; m>$+sMZE
} dl@
int a = temp[l]; 3k5OYUk
int b = temp[r]; "8J$7g@n@
for (i = l, j = r, k = l; k <= r; k++) { |X`xJL
if (a < b) { :#"gQ^YNp
data[k] = temp[i++]; /}r%DND'
a = temp; \y{Bnp5h
} else { 9M:wUYHT
data[k] = temp[j--]; T.GY
b = temp[j]; M5HKRLt
} gzvEy^X
} \i}n1Qd
} Y.3]vno?X
~!&WK,k6
/** ]]Ypi=<'
* @param data aG8}R~wH&
* @param l 3Tg
* @param i $:s1x\ol
*/ tfvX0J
private void insertSort(int[] data, int start, int len) { 3/>McZ@OH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Byyus[b'A
} -7*,}xV
} nZhL
} FJKt5}`8
} o8BbSZVu
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堆排序： RtGETiA\b
'N)&;ADx-G
package org.rut.util.algorithm.support; L{ ?& .iA
z9U<Z^4z+
import org.rut.util.algorithm.SortUtil; Vc$x?=
_+N*4
/** ,Ww)>O+
* @author treeroot nM34zVy
* @since 2006-2-2 OljUK,I]
* @version 1.0 69ia #
*/ U_m<W$"HF
public class HeapSort implements SortUtil.Sort{ 4Z"DF)+}
!m^;Apuy
/* (non-Javadoc) s\1h=V)!H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pvQw+jX
*/ WmP"u7I4
public void sort(int[] data) { G/J5aj[
MaxHeap h=new MaxHeap(); R+#|<e5@%o
h.init(data); &Hb6
for(int i=0;i h.remove(); NZ/gp"D?
System.arraycopy(h.queue,1,data,0,data.length); YTpSR~!Rj
} G$}\~dD
DGj:qd(
private static class MaxHeap{ n'v[[bmu
fySzZ
void init(int[] data){ hf^,
this.queue=new int[data.length+1]; Y[i>
for(int i=0;i queue[++size]=data; di>"\On-
fixUp(size); 2B3H-`
} YH&`+ +
} f%` =>l
b/5?)!I
private int size=0; j1*'yvGM
kq8:h
private int[] queue; $IA(QC_]AO
Oj\lg2Ck
public int get() { HhhN8t
return queue[1]; D'ZR>@w@
} L TZ3r/
[0El z@.C
public void remove() { 6C4c.+S
SortUtil.swap(queue,1,size--); C$SuFL(pb
fixDown(1); g2JNa?z
} {3@f(H m
file://fixdown v{$X2z_$w
private void fixDown(int k) { /qed_w.p
int j; 57*z0<
while ((j = k << 1) <= size) { #Gx%PQ`
if (j < size %26amp;%26amp; queue[j] j++; wUW^ O
if (queue[k]>queue[j]) file://不用交换 rS\j9@=Y4
break; fPZt*A__
SortUtil.swap(queue,j,k); 0z #'=XWk
k = j; ' 7+x,TszI
} t*m04* }
} CeSr~Ikg|
private void fixUp(int k) { ynvU$}w ~'
while (k > 1) { !'wh hi
int j = k >> 1; D)U 9xA)J
if (queue[j]>queue[k]) g&!UaJ[#9
break; Hdw;=]-
SortUtil.swap(queue,j,k); jOa .h
k = j; ^=.R#zrc
} u)Y~+ [Q
} %i{Z@
U<gMgA
} @)1>ba
zflfV!vAg
} Gole7I
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SortUtil： m_zl*s*6
:m]~o3KRy
package org.rut.util.algorithm; 7DDd1"jE
2-728
import org.rut.util.algorithm.support.BubbleSort; T$%r?p(s
import org.rut.util.algorithm.support.HeapSort; Y<-h#_
import org.rut.util.algorithm.support.ImprovedMergeSort; ug{@rt/"Z
import org.rut.util.algorithm.support.ImprovedQuickSort; < aJl i
import org.rut.util.algorithm.support.InsertSort; 0uV3J
import org.rut.util.algorithm.support.MergeSort; 1DgRV7
import org.rut.util.algorithm.support.QuickSort; WvR-0>E
import org.rut.util.algorithm.support.SelectionSort; \(2w/~
import org.rut.util.algorithm.support.ShellSort; I{tY;b'w
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/** Y[)b".K
* @author treeroot e+6mbJ7y
* @since 2006-2-2 pFgpAxl
* @version 1.0 "BT*9N=|
*/ 5xC4lT/U
public class SortUtil { s!,m,l[P
public final static int INSERT = 1; CX?q%o2b
public final static int BUBBLE = 2; .DsdQ4Y
public final static int SELECTION = 3; 1/+d@s#t
public final static int SHELL = 4; 9uR+
public final static int QUICK = 5; hb#Nm6
public final static int IMPROVED_QUICK = 6; .7&V@A7
public final static int MERGE = 7; .a2b&}/.d
public final static int IMPROVED_MERGE = 8; F]e`-;
public final static int HEAP = 9; lC/1,Z/M
|_."U9!Z^
public static void sort(int[] data) { %]7'2
sort(data, IMPROVED_QUICK); `ppyCUX
} x1H1[0w,i
private static String[] name={ x1]J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K8#MQR2@
}; k%uR!cL
Ha~F&H|"O
private static Sort[] impl=new Sort[]{ _D~l2M
new InsertSort(), K&ZN!VN/p
new BubbleSort(), m}A|W[p<
new SelectionSort(), TOapq9B]
new ShellSort(), GT.1,E,Vw
new QuickSort(), 6&|hpp#[
new ImprovedQuickSort(), Y`F)UwKK
new MergeSort(), $B%wK`J
new ImprovedMergeSort(), }Q$}LR@
new HeapSort() q9Zp8&<EqH
}; T_R2BBT v
F!7dGa$
public static String toString(int algorithm){ RO+ jVY~H-
return name[algorithm-1]; Ov8^6O
} QN47+)cVt"
Vu.VH([b]Q
public static void sort(int[] data, int algorithm) { &O +?#3
impl[algorithm-1].sort(data); /tm2b<G
} n(I,pF
"DaE(S&
public static interface Sort { "&Hr)yyWG
public void sort(int[] data); a-e_q
} "I)/|x\G*
V>Dqw!
public static void swap(int[] data, int i, int j) { +YZ*>ki
int temp = data; F m?j-'
data = data[j]; b@QCdi,u
data[j] = temp; <fHJ9(5$V
} l266ufO.u-
} tGE=!qk