[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; DPf].i#
} cI[i v
int i1=l; .h <=C&Yg
int i2=mid+1; fcdXj_u
for(int cur=l;cur<=r;cur++){ G T~rr*X
if(i1==mid+1) &n| <NF
data[cur]=temp[i2++]; |y7TYjg6
else if(i2>r) ,C6(
data[cur]=temp[i1++]; N[Xm5J
else if(temp[i1] data[cur]=temp[i1++]; +}m`$B}mJ
else l0G{{R0Y
data[cur]=temp[i2++]; qK$O /g,
} P.>fkO1\
} DTC IVLV
YQD`4ND
} X}'rPz\Lu
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改进后的归并排序: _kBmKE
n}Z%-w$K#
package org.rut.util.algorithm.support; P\dfxR;8%
BW;@Gq@N
import org.rut.util.algorithm.SortUtil; #!_4ZX
=EVB?k ,
/** ,$!fyi[;C
* @author treeroot =A5i84y.2u
* @since 2006-2-2 gA=Pz[i)p
* @version 1.0 $zOV*O2
*/ N=u( 3So
public class ImprovedMergeSort implements SortUtil.Sort { qf K gNZ
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private static final int THRESHOLD = 10; kmBA
+ase>'<N#
/* 8o:h/F
* (non-Javadoc) (;g/wb:
* |m\7/&@<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w)<.v+u.Y
*/ ,sj(g/hg
public void sort(int[] data) { c k[uvH
int[] temp=new int[data.length]; )PR`irw
mergeSort(data,temp,0,data.length-1); }{:Jj/d p
} ~Q"qz<WO
.&5 3sJ0{
private void mergeSort(int[] data, int[] temp, int l, int r) { Y|mtQE?c
int i, j, k; 0;a10b
int mid = (l + r) / 2; kK6t|Yn&
if (l == r) elM<S3
return; UHV"<9tk
if ((mid - l) >= THRESHOLD) \gT({XU?
mergeSort(data, temp, l, mid); @RB^m(> 5
else !gyW15z'
insertSort(data, l, mid - l + 1); '~yxu$aK
if ((r - mid) > THRESHOLD) O\q6T7bfRW
mergeSort(data, temp, mid + 1, r); !*DYdqQ/
else M.SF}U
insertSort(data, mid + 1, r - mid); 0XljFQ
.`KzA]&#
for (i = l; i <= mid; i++) { \|vo@E
temp = data; p}~Sgi
} ymrnu-p o
for (j = 1; j <= r - mid; j++) { ,4,Bc<
temp[r - j + 1] = data[j + mid]; F'wG%
} 9[~.{{Y
int a = temp[l]; PQi(Oc
int b = temp[r]; l^tRy_T:-
for (i = l, j = r, k = l; k <= r; k++) { Z[!kEW
if (a < b) { `E;xI v|
data[k] = temp[i++]; uYO$gRem
a = temp; I<W<;A
} else { kN*I_#
data[k] = temp[j--]; ?w'03lr%
b = temp[j]; P7X3>5<;q
} g9Dynm5
} BC#`S&R
} Ta3* G
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/** o=![+g
* @param data #3>jgluM'
* @param l ^0{t
* @param i Kl?C[
*/ WOgkv(5KN
private void insertSort(int[] data, int start, int len) { Nj?Q{ztS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ei2M~/
} #$ka.Pj
} sWTa;Qi
} VeEa17g&
} ,<7HLV
\ %xku:
堆排序： `p)U6J
25 U+L
package org.rut.util.algorithm.support; =^zGn+@z
Fv(FRZ)
import org.rut.util.algorithm.SortUtil; b5~p:f-&4B
Z>/ *q2
/** CZ^ ,bad
* @author treeroot ]"O*&
* @since 2006-2-2 ~md06"AYJ
* @version 1.0 h8k\~/iJ
*/ h0x'QiCc
public class HeapSort implements SortUtil.Sort{ Jz0AYiCq
_/ 5
/* (non-Javadoc) vEE\{1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vv`94aQTD
*/ %"#ydOy
public void sort(int[] data) { {a2Gb
MaxHeap h=new MaxHeap(); 3*?W2;Zw$
h.init(data); ES(qu]CjI
for(int i=0;i h.remove(); pL*aU=FjQ
System.arraycopy(h.queue,1,data,0,data.length); Wj)v,v2&
} RP 6<#tq,
>`yRL[c;
private static class MaxHeap{ [k%u$
$E8}||d
void init(int[] data){ C%%gCPI^y
this.queue=new int[data.length+1]; 2/F8kVx{
for(int i=0;i queue[++size]=data; '"hSX=
fixUp(size); ;i [;%
} oFzmH!&ED
} Fo0s<YlS-
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private int size=0; vXM{)
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private int[] queue; Q7zpu/5?
sw:a(o&$
public int get() { m.gv?
return queue[1]; ;Ob^@OM
} ]W`M <hEI
8F$]@0v`%
public void remove() { >%N,F`^3
SortUtil.swap(queue,1,size--); J_<6;#
fixDown(1); X_3hh}=
} oZL# *Z(h
file://fixdown "ChJR[4@
private void fixDown(int k) { lQRtsmZ0
int j; w}97`.Kt!n
while ((j = k << 1) <= size) { Hkf]=kPy*
if (j < size %26amp;%26amp; queue[j] j++; zlkW-rRkR
if (queue[k]>queue[j]) file://不用交换 R%9,.g<
break; w%oa={x
SortUtil.swap(queue,j,k); nb*`GE
k = j; U9\w)D|+eE
} ]Ee$ulJ02
} s I0:<6W
private void fixUp(int k) { M`* BS
while (k > 1) { z63y8
int j = k >> 1; o>]z~^c
if (queue[j]>queue[k]) xNRMI!yv
break; Z;;A#h'%e
SortUtil.swap(queue,j,k); Zx: h)I
k = j; *vqUOh
} u3Zu ~C
} 0q]0+o*%
sQ[N3
} 4l>d^L
X]W(
} 00r7trZW^
v@J[qpX
SortUtil： *.T?#H
[;~"ctf{
package org.rut.util.algorithm; >4+KEK
r{*BJi.b
import org.rut.util.algorithm.support.BubbleSort; -I;\9r+
import org.rut.util.algorithm.support.HeapSort; I;G(Wj
import org.rut.util.algorithm.support.ImprovedMergeSort; R. vVl+
import org.rut.util.algorithm.support.ImprovedQuickSort; N9rAosO*
import org.rut.util.algorithm.support.InsertSort; `UqX`MFz
import org.rut.util.algorithm.support.MergeSort; ID{XZ
import org.rut.util.algorithm.support.QuickSort; a#9pN?~
import org.rut.util.algorithm.support.SelectionSort; h7o.RRhK
import org.rut.util.algorithm.support.ShellSort; OpK_?XG
nC!L<OMr
/** RU>qj *e
* @author treeroot /fAAQ7
* @since 2006-2-2 jmP;(j.|
* @version 1.0 <jM { <8-
*/ MhB>bnWXR
public class SortUtil { jCIY(/
public final static int INSERT = 1; D`KaIqLz
public final static int BUBBLE = 2; =([4pG
public final static int SELECTION = 3; dt"&
public final static int SHELL = 4; 7lKatk+7K
public final static int QUICK = 5; 7QoMroR
public final static int IMPROVED_QUICK = 6; \F""G,AWq{
public final static int MERGE = 7; U;!J(Us
public final static int IMPROVED_MERGE = 8; R-wz+j#
public final static int HEAP = 9; !DF5NAE
'P[#.9E
public static void sort(int[] data) { j"VDqDDz
sort(data, IMPROVED_QUICK); "{Y6.)x
} e,W,NnCICj
private static String[] name={ "7jE&I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4GXS(
}; <z>oY2%
$q.}eb0
private static Sort[] impl=new Sort[]{ QBN\wL8g
new InsertSort(), v53|)]V
new BubbleSort(), ~03MH'
new SelectionSort(), F!*GrQms
new ShellSort(), ?zbWz=nq
new QuickSort(), eg1F[~YL/
new ImprovedQuickSort(), ,(f W0d#
new MergeSort(), -8<vWe
new ImprovedMergeSort(), 9QL%q; #
new HeapSort() 8%xBSob{j
}; =);@<Jp
tCar:p4$
public static String toString(int algorithm){ vbZ!NO!H
return name[algorithm-1]; Xkg
} !ab ef.%:
m4Ue)
public static void sort(int[] data, int algorithm) { ;-;lM6zP
impl[algorithm-1].sort(data); mVh;=>8K
} $em'H,*b3
y\Utm$)j
public static interface Sort { 1xkrhqq
public void sort(int[] data); W8;!rFW
} Jyr V2Tk^
%H2ios[UO
public static void swap(int[] data, int i, int j) { 3JkdPh
int temp = data; ;[(d=6{hc]
data = data[j]; bS954d/
data[j] = temp; vLyazVj..
} @qj]`}Gx'
} CyW|k Dz