[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; :t?Z
} h!l&S2)D`
int i1=l; :l~^un|<2Y
int i2=mid+1; C+\c(M a
for(int cur=l;cur<=r;cur++){ K,f*}1$qM
if(i1==mid+1) M*ZR+pq,
data[cur]=temp[i2++]; tQz=_;jy
else if(i2>r) R5PXX&Q
data[cur]=temp[i1++]; NN(ZH73
else if(temp[i1] data[cur]=temp[i1++]; 49S*f
else 8w-2Q
data[cur]=temp[i2++]; c:QZ(8d]L
} GZY8%.1{"a
} 9z>I&vcX
h/`]=kCl
} xZ'-G6O "~
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改进后的归并排序: :iW+CD)j
zJC!MeN
package org.rut.util.algorithm.support; CJ+/j=i;~c
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import org.rut.util.algorithm.SortUtil; (bpO>4(S
cE(P^;7D
/** 9i+OYWUO
* @author treeroot FKhmg&+>
* @since 2006-2-2 LIzdP,^pc
* @version 1.0 (I(?oCQ
*/ kw,eTB<;R
public class ImprovedMergeSort implements SortUtil.Sort { VRe7Q0
kg0X2^#b
private static final int THRESHOLD = 10; @)[Q6w`x
KtTlc#*KU
/* bs_>!H1
* (non-Javadoc) p5RnFe l
* *4]u?R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5q<cZ)v#&
*/ %t&
public void sort(int[] data) { k@[\C`P
int[] temp=new int[data.length]; n=t50/jV3=
mergeSort(data,temp,0,data.length-1); |qUi9#NUo
} 25e*W>SLw
~SKV%
private void mergeSort(int[] data, int[] temp, int l, int r) { O9%`G
int i, j, k; ylFoYROO
int mid = (l + r) / 2; 9]u=b\fzZ
if (l == r) %x}iEqkU
return; V{#8+
if ((mid - l) >= THRESHOLD) G;RFY!o
mergeSort(data, temp, l, mid); HpbSf1VvAf
else 2bu,_<K.
insertSort(data, l, mid - l + 1); l', +l{\Z
if ((r - mid) > THRESHOLD) B{}<DP.
mergeSort(data, temp, mid + 1, r); .|XG0M
else S($8_u$U
insertSort(data, mid + 1, r - mid); hJ~Na\?w
pl#2JA8
for (i = l; i <= mid; i++) { tVI6GXH
temp = data; 244[a] %&;
} 4gR;,%E\TO
for (j = 1; j <= r - mid; j++) { @k+&89@G
temp[r - j + 1] = data[j + mid]; +Tf4SJ
} q4y P\B
int a = temp[l]; *'?aXS -'r
int b = temp[r]; bCa%$
for (i = l, j = r, k = l; k <= r; k++) { +(Q$GO%
if (a < b) { kZb #k#
data[k] = temp[i++]; _?VMSu
a = temp; g:dtfa/]
} else { 8Pb~`E/
data[k] = temp[j--]; -BV8,1
b = temp[j]; v3p'*81;
} zD"n7;
} rXh*nC
} r`dQ<U,
U# +$N3%
/** [I~&vLTe
* @param data RIm8PV;N
* @param l 2}\/_Y6
* @param i 1eP`
*/ 1hTE^\W
private void insertSort(int[] data, int start, int len) { 1]&FB{l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +,g3Xqs}X
} I$0O4
} &':Ecmo~`
} $@Bd}35 J
} -v@LJCK7I
]z77hcjB1
堆排序： *\$m1g7b
C%RYQpY*c
package org.rut.util.algorithm.support; " ""k}M2A
+nAbcBJAl
import org.rut.util.algorithm.SortUtil; o;kxu(>yL'
i!<1&{
/** !VDNqW
* @author treeroot C0K0c6A(4
* @since 2006-2-2 n g,&;E
* @version 1.0 |KMwK png
*/ 0s$;3qE
public class HeapSort implements SortUtil.Sort{ <u_vL WS
BjSd\Ul
/* (non-Javadoc) {D$5M/$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /:Q
*/ ;:PxWm|_
public void sort(int[] data) { Of}dsav
MaxHeap h=new MaxHeap(); mu*RXLai
h.init(data); jk\z-hd
for(int i=0;i h.remove(); 0h-'TJg*sk
System.arraycopy(h.queue,1,data,0,data.length); (=-6'23q)
} Q"vhl2RX
"Snt~:W>
private static class MaxHeap{ GBY-WN4sc[
0$g;O5y"i
void init(int[] data){ 8wEUly
this.queue=new int[data.length+1]; XN&cM,
for(int i=0;i queue[++size]=data; +\R__tx;
fixUp(size); p![UOI"W
} |[_%zV;p>v
} X,A]<$ACu%
]x(cX&S-9
private int size=0; /lS5B6NU
}'p"q)
private int[] queue; %dwI;%0
hLICu[LC?
public int get() { 0FcG;i+
return queue[1]; <kCOg8<y :
} @P)2ZGG
Di"Tv<RlQ
public void remove() { koa-sy)#L
SortUtil.swap(queue,1,size--); yz<$?Gblz
fixDown(1); r"|UgCc
} 5AbY 59
file://fixdown XiMd|D
private void fixDown(int k) { Q?2GwN
int j; Nu;?})tF
while ((j = k << 1) <= size) { HcQ)XJPK
if (j < size %26amp;%26amp; queue[j] j++; QJy1j~9x
if (queue[k]>queue[j]) file://不用交换 2,6~;R
break; $%6.lQ
SortUtil.swap(queue,j,k); yvWM]A
k = j; 9RPZj>ezjA
} ;(-Wc9=
} tc0(G~.N
private void fixUp(int k) { $@HW|Y
while (k > 1) { >{)\GK0i7
int j = k >> 1; -V&nlP
if (queue[j]>queue[k]) ~l8w]R3A
break; }nRTw2-z
SortUtil.swap(queue,j,k); }X/>WiGh:
k = j; Ye|(5f
} b]4\$rW7
} \iRmGvT
G1a56TIN~
} <{T5}"e
pkf$%{"e
} hTQ8y10a
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SortUtil： `>- 56 %
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package org.rut.util.algorithm; J=J!)\m
^4Uk'T7V
import org.rut.util.algorithm.support.BubbleSort; -asjBSo*D
import org.rut.util.algorithm.support.HeapSort; skYHPwJdW
import org.rut.util.algorithm.support.ImprovedMergeSort; VGf&'nL@,
import org.rut.util.algorithm.support.ImprovedQuickSort; V-(*{/^"
import org.rut.util.algorithm.support.InsertSort; D}`MY\H
import org.rut.util.algorithm.support.MergeSort; t2Px?S?
import org.rut.util.algorithm.support.QuickSort; t$3B#=
import org.rut.util.algorithm.support.SelectionSort; wBJ|%mc3TA
import org.rut.util.algorithm.support.ShellSort; R"yxpw
;$67GK
/** rvacCwI
* @author treeroot P(UY}oU
* @since 2006-2-2 +G6 Ge;
* @version 1.0 0a2#36;_IK
*/ 3a[LM!
public class SortUtil { dZY|6
public final static int INSERT = 1; rJ{k1H>
public final static int BUBBLE = 2; Z,DSTP\|
public final static int SELECTION = 3; R=3|(R+kA
public final static int SHELL = 4; +Ks3
public final static int QUICK = 5; "rrw~
public final static int IMPROVED_QUICK = 6; vm7ag 7@O
public final static int MERGE = 7; fRb
public final static int IMPROVED_MERGE = 8; A34O(fE
public final static int HEAP = 9; -,Js2+QZ#
~z(0XKq0d
public static void sort(int[] data) { nsM.`s@V
sort(data, IMPROVED_QUICK); %d%FI"!K
} P]iJ"d]+X
private static String[] name={ !"ir}Y%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H.;2o(vD
}; kCALJRf~d
"=ki_1/P
private static Sort[] impl=new Sort[]{ QUm[7<"
new InsertSort(), ^Kl*}
new BubbleSort(), j/jFS]iC
new SelectionSort(), <J>k%,:B
new ShellSort(), d)3jkHYEjj
new QuickSort(), !ALq?u
new ImprovedQuickSort(), O6,2M[a
new MergeSort(), ]T{v~]7:{
new ImprovedMergeSort(), k8!:`jG
new HeapSort() *&tTiv{^
}; a)*(**e$*i
iaJLIrl
public static String toString(int algorithm){ E5#ff5
return name[algorithm-1]; \<hHZS
} +4p=a [
,|GjrT{vf
public static void sort(int[] data, int algorithm) { 4s9.")G
impl[algorithm-1].sort(data); If]rg+|U
} /'zXb_R,$
"sIww
public static interface Sort { wwet90_g
public void sort(int[] data); gi>W&6
} ">M&/}4
3ZN\F
public static void swap(int[] data, int i, int j) { ]9~Il#
int temp = data; P+y XC^ ,
data = data[j]; \mTi@T!&
data[j] = temp; a*t @k*d_
} ;n.h!wmJ}
} Nobu= Z