[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; &d$~6'x*
} PjqeE,5
int i1=l; XYbyOM VI
int i2=mid+1; ?{J!#`tfV
for(int cur=l;cur<=r;cur++){ A[/I#Im7
if(i1==mid+1) ):6-
data[cur]=temp[i2++]; A! 6r/
else if(i2>r) )3E,D~1e%
data[cur]=temp[i1++]; mVH,HqsXa
else if(temp[i1] data[cur]=temp[i1++]; H:oQ
else ~a+NJ6e1
data[cur]=temp[i2++]; gT1P*N;v
} |'hLa
} :\}U9QfCw
#1Z7&#R/
} -l*A
`<vxG4=62\
改进后的归并排序: we]>(|
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package org.rut.util.algorithm.support; H7IW"UkBR
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import org.rut.util.algorithm.SortUtil; x*8O*!ZZ
h W.2p+
/** C|e+0aW
* @author treeroot $-G`&oT
* @since 2006-2-2 Lar r}o=
* @version 1.0 Lx+`<<_dJ
*/ 12gw#J/)9h
public class ImprovedMergeSort implements SortUtil.Sort { W,NL*($^
E/O5e(h
private static final int THRESHOLD = 10; q.oLmX
@FX{M..
/* ju{%'D!d9
* (non-Javadoc) RV!<?[
* -0|K,k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W);W.:F
*/ cC6z,0`3
public void sort(int[] data) { eqFvrESN~=
int[] temp=new int[data.length]; 0\ f-z6
mergeSort(data,temp,0,data.length-1); ~iTxv_\=6u
} \graMu}-
Ml`vx
private void mergeSort(int[] data, int[] temp, int l, int r) { %8D?$v"#Z
int i, j, k; T\3[F%?
int mid = (l + r) / 2; sc xLB;
if (l == r) W^R'@
return; ba&o;BLUy
if ((mid - l) >= THRESHOLD) s-6:N9-
mergeSort(data, temp, l, mid); jH0Bo;
else {8m1dEC^@Q
insertSort(data, l, mid - l + 1); _Y#Bm/*
if ((r - mid) > THRESHOLD) !J#.!}3
mergeSort(data, temp, mid + 1, r); Yo'K pdn
else %cj58zO|y
insertSort(data, mid + 1, r - mid); |\{Nfm=:%
OOLe[P3J3
for (i = l; i <= mid; i++) { pG28M]\
temp = data; JK^[{1 JI
} Kq7C0)23
for (j = 1; j <= r - mid; j++) { 5; f\0<-
temp[r - j + 1] = data[j + mid]; Yw^ Gti'<
} 3]S`|#J
int a = temp[l]; l\aUresm
int b = temp[r]; dpn3 (
for (i = l, j = r, k = l; k <= r; k++) { .eTk=i[N-
if (a < b) { okDJ(AIV+
data[k] = temp[i++]; wP`sXPSmIu
a = temp; coAW9=o}
} else { PW^ 8;[\QP
data[k] = temp[j--]; Z3`2-r_=
b = temp[j]; }xJR.]).KW
} C1ZyB"{
} o*;2mFP
} nP u`;no
=c]a {|W?
/** "WP% REE!
* @param data QK7e|M
* @param l =h[yAf
* @param i @YB85p"]J.
*/ R-C5*$
private void insertSort(int[] data, int start, int len) { `,m7xJZ?y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E0jUewG
} A^vvST%7
} EE9vk*[@C
} 3{q[q#"
} `oPLl0
aH^{Vv$]M@
堆排序： tQf!|]#J
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package org.rut.util.algorithm.support; T^NJ4L4#
@#CF".fuN>
import org.rut.util.algorithm.SortUtil; Z"N(=B
kxy]vH6m
/** id4]|jb
* @author treeroot bQV("~#
* @since 2006-2-2 2$)mC9
* @version 1.0 1gk0l'.z
*/ x Ty7lfSe
public class HeapSort implements SortUtil.Sort{ N6BNzN}-P
#{~7G%GPY5
/* (non-Javadoc) 8>dq=0:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qxSs ~Qc
*/ OaNc9c"
public void sort(int[] data) { <vLdBfw&N
MaxHeap h=new MaxHeap(); i :EO(`
h.init(data); c _p[yS
for(int i=0;i h.remove(); kU(kU2u%9
System.arraycopy(h.queue,1,data,0,data.length); #!1IP~
} IadK@?X6j
BDp:9yau
private static class MaxHeap{ rFO_fIJno
1^tSn#j
void init(int[] data){ 'tut4SwC
this.queue=new int[data.length+1]; :r-.r"[m-
for(int i=0;i queue[++size]=data; H}a)^90_
fixUp(size); )Oo2<:"
} D2Vv\f
} pd7O`.3
Ri[S<GOMii
private int size=0; e@yx}:]h
)5'rw<:="
private int[] queue; ]*a@*0=
_ flgQ
public int get() { i<Q& D\Pv
return queue[1]; OMi02tSm
} mDlCt_h
W0U`Kt&~a
public void remove() { /t$*W\PL@
SortUtil.swap(queue,1,size--); e6o/q)9#
fixDown(1); hi0XVC95
} B#Qpd7E+*
file://fixdown (< :mM
private void fixDown(int k) { |;~nI'0O])
int j; p!QR3k.9s
while ((j = k << 1) <= size) { I}rGx
if (j < size %26amp;%26amp; queue[j] j++; h&q=I.3O|?
if (queue[k]>queue[j]) file://不用交换 b24di
break; wFp~
SortUtil.swap(queue,j,k); ` %l&zwj>
k = j; 7x%S](m%
} ['?^>jfr
} 48:liR
private void fixUp(int k) { \+G.]|"Y
while (k > 1) { 7 TmK
int j = k >> 1; Z~:/#?/
if (queue[j]>queue[k]) p8$\uo9YQ
break; :|zp8|
SortUtil.swap(queue,j,k); ~K_]N/ >
k = j; ,RR;VKj
} Oe/73| >U
} xSx&79Ez<*
pmoGudaRF
} Z4\tY^NI
+{S Maq
} L!?v BL
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SortUtil： QN3qF|))
\)p4okpR
package org.rut.util.algorithm; ^4RO
<|B$dz?r
import org.rut.util.algorithm.support.BubbleSort; Tm%WWbc
import org.rut.util.algorithm.support.HeapSort; aD?# ,
import org.rut.util.algorithm.support.ImprovedMergeSort; ;,mBT[_ZO
import org.rut.util.algorithm.support.ImprovedQuickSort; ?rAi=w&c
import org.rut.util.algorithm.support.InsertSort; K?$9N}+
import org.rut.util.algorithm.support.MergeSort; a^%8QJW
import org.rut.util.algorithm.support.QuickSort; ^dheJ]n=k
import org.rut.util.algorithm.support.SelectionSort; [y_yPOv
import org.rut.util.algorithm.support.ShellSort; r^fxyN2V
h\/^Aa0
/** }!eF
* @author treeroot \moZ6J
* @since 2006-2-2 !p-'t]
* @version 1.0 2;3x,<Cg
*/ p .lu4
public class SortUtil { =_K%$y*
public final static int INSERT = 1; IES41y<
public final static int BUBBLE = 2; 8y-e+
public final static int SELECTION = 3; jkZ_c!
public final static int SHELL = 4; >F,$;y52
public final static int QUICK = 5; OY+!aG@.
public final static int IMPROVED_QUICK = 6; !}z%#$
public final static int MERGE = 7; )lQN)!.)
public final static int IMPROVED_MERGE = 8; 0T7M_G'5Q
public final static int HEAP = 9; Xs{/}wc.q;
+dDJes!]
public static void sort(int[] data) { <m~T>Ql1
sort(data, IMPROVED_QUICK); MP6 \r
} @=02
private static String[] name={ yBr$ 0$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" GTT5<diw
}; Up_>y>x
}*xC:A%aS
private static Sort[] impl=new Sort[]{ C<zx'lw!
new InsertSort(), s'R~r
new BubbleSort(), bMSD/L
new SelectionSort(), 8W(<q|t
new ShellSort(), Ti0 (VdY
new QuickSort(), ac2}3$u
new ImprovedQuickSort(), N;e;4,_ n
new MergeSort(), rdORNlK&
new ImprovedMergeSort(), s4MNVT
new HeapSort() pI'8>_o
}; ;5&k/CB1
'=KuJ0`nE9
public static String toString(int algorithm){ /&~nM
return name[algorithm-1]; NvXj6U*%
} |U8>:DEl
6lB{Ao?|
public static void sort(int[] data, int algorithm) { {KF7j63
impl[algorithm-1].sort(data); nL 1IS
} .t"n]X i
>l7eoj
public static interface Sort { P&qy.0
public void sort(int[] data); I@8+k&nXS
} v]LFZI5
YR$tPe
public static void swap(int[] data, int i, int j) { .d<~a1k
int temp = data; P58\+9d_
data = data[j]; jrDz7AfA
data[j] = temp; rU/-Wq`B
} 4v rm&k
} v1`bDS?*Q