[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; 7;}l\VXHm
} o>lmst%<
int i1=l; yTBS=+X
int i2=mid+1; ;LwqTlJ*[L
for(int cur=l;cur<=r;cur++){ TprtE.mP
if(i1==mid+1) d"Q |I
data[cur]=temp[i2++]; xN"Z1n7t
else if(i2>r) r':TMhzHq?
data[cur]=temp[i1++]; :@3Wg3N
else if(temp[i1] data[cur]=temp[i1++]; `\Unpp\I
else adO&_NR
data[cur]=temp[i2++]; 4)1;0,tlG
} >G"X J<IO
} Y}STF
cO#oH2}
} *r,b=8|
d/,E2i{I7
改进后的归并排序: \5><3*\
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package org.rut.util.algorithm.support; &tI#T)SSs
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import org.rut.util.algorithm.SortUtil; &#m"/g7w4N
!~iGu\y
/** vS?odqi#n
* @author treeroot xytr2V ]aV
* @since 2006-2-2 qr(`&hB-L
* @version 1.0 4? (W%?
*/ 8;\sU?
public class ImprovedMergeSort implements SortUtil.Sort { 2WBq
H7g< p"
private static final int THRESHOLD = 10; !u;>Wyd W
NCS!:d:Ry
/* )j&"%[2F
* (non-Javadoc) F # YPOH
* 'cdN3i(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Iw=Sq8
*/ }nx=e#[g%2
public void sort(int[] data) { GG6%bF
int[] temp=new int[data.length]; KLQ!b,=q
mergeSort(data,temp,0,data.length-1); 9IZu$-
} QLq@u[A
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private void mergeSort(int[] data, int[] temp, int l, int r) { 6XV<? 9q
int i, j, k; W?RE'QV8
int mid = (l + r) / 2; pa]"iZz
if (l == r) #gbH^a'
return; 2y GOzc
if ((mid - l) >= THRESHOLD) oduDA:
mergeSort(data, temp, l, mid); .p6+l!"
else 9s$U%F6}
insertSort(data, l, mid - l + 1); &eZfQ27$
if ((r - mid) > THRESHOLD) 1cJsj
mergeSort(data, temp, mid + 1, r); o|8`>!hF
else t}p@:'
insertSort(data, mid + 1, r - mid); HK=[U9 o?
NX6nQ
for (i = l; i <= mid; i++) { ' [0AHM
temp = data; tbDoP Y
} E+xuWdp.*
for (j = 1; j <= r - mid; j++) { pw020}`
temp[r - j + 1] = data[j + mid]; i^"+5Eq[D
} vA%^`5
int a = temp[l]; MtmOUI&'
int b = temp[r]; ^CT&0
for (i = l, j = r, k = l; k <= r; k++) { yX/";Oe
if (a < b) { NYB[Zyp
data[k] = temp[i++]; 12`_;[37
a = temp; v> z@
} else { P&A|PY,P
data[k] = temp[j--]; x8#ODuH
b = temp[j]; SAv<&
} `k{& /]
} \c`oy=qY0
} Es5p}uh.[Y
8\ha@&p
/** QBJ3iQs1
* @param data j6}R7$JR
* @param l _%@=Uc6V
* @param i x%> e)L<
*/ 90N`CXas
private void insertSort(int[] data, int start, int len) { A2H4k|8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j -O2aL
} KpiF0K
} 9h,u6e
} 5_o$<\I\
} ./-JbW
h1"zV6U
堆排序： J{"kw1Lu
b!>\2DlyJ
package org.rut.util.algorithm.support; Vd9@Dy
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import org.rut.util.algorithm.SortUtil; 2ef;NC.&n
[bQj,PZ&
/** in%;Eqk
* @author treeroot PH4%R]{8{
* @since 2006-2-2 S[:xqzyDg
* @version 1.0 irBDGT~
*/ g^>#^rLU
public class HeapSort implements SortUtil.Sort{ v Y|!
GR4?BuY,
/* (non-Javadoc) H^%.=kf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -`c:}m
*/ Ju` [m
public void sort(int[] data) { kAzd8nJ'
MaxHeap h=new MaxHeap(); T)CzK<LbR
h.init(data); ^(x^6d
for(int i=0;i h.remove(); <I*x0BM=
System.arraycopy(h.queue,1,data,0,data.length); Q}AE.Ef@<
} uZ6d35MJ
/'DwfX
private static class MaxHeap{ V~{ _3YY
,K9f_bv
void init(int[] data){ e&It
this.queue=new int[data.length+1]; rJfqA@
for(int i=0;i queue[++size]=data; *gsAn<
fixUp(size); {y^3> 7
} ,2[ra9n
} ?[)S7\rP
r8MZvm2
private int size=0; TQ :/RT
d4^`}6@
private int[] queue; Tp%(I"H'_;
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public int get() { 3eIr{xs
return queue[1]; nY?
} }k$4/7ri
wOgE|n
public void remove() { S4NL "m
SortUtil.swap(queue,1,size--); eo]#sf@\0
fixDown(1); 0Ce]V,i6C>
} ik1tidw
file://fixdown n(Y%Vmy
private void fixDown(int k) { rx~[Zs+*
int j; .5HQ
while ((j = k << 1) <= size) { <!^ [~`
if (j < size %26amp;%26amp; queue[j] j++; cSP*f0n,eo
if (queue[k]>queue[j]) file://不用交换 y7u^zH6wj
break; >R^@Ww;|q
SortUtil.swap(queue,j,k); ilLBCS}
k = j; _uxPx21g}
} mPZGA\
} m 40m<@
private void fixUp(int k) { 6)RbPPeE
while (k > 1) { >O9sk
int j = k >> 1; EYS>0Y
if (queue[j]>queue[k]) ]L_w$ev'
break; pR os{Uq"
SortUtil.swap(queue,j,k); {i{xo2<1"
k = j; #~ v4caNx
} H. ,;-
} h=VqxGC&
=5]n\"/
} ?^!,vh
yOXO)u1n
} YZ}cB
K\!#4>yd
SortUtil： C*Vd-U
l)8&Ip
package org.rut.util.algorithm; 5OLQw(E
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import org.rut.util.algorithm.support.BubbleSort; F}?<v8#z0
import org.rut.util.algorithm.support.HeapSort; x4?10f(9=
import org.rut.util.algorithm.support.ImprovedMergeSort; ,32xcj}j)r
import org.rut.util.algorithm.support.ImprovedQuickSort; f|3q^wjs
import org.rut.util.algorithm.support.InsertSort; N_wp{4 0/
import org.rut.util.algorithm.support.MergeSort; C9tb\?#
import org.rut.util.algorithm.support.QuickSort; @|-OJ4[5
import org.rut.util.algorithm.support.SelectionSort; Qc-(*}
import org.rut.util.algorithm.support.ShellSort; ;6;H*Y0,|E
8^ep/b&|
/** '"YYj$> '
* @author treeroot 7v~j=Z>
* @since 2006-2-2 @uleyB
* @version 1.0 3x*z\VJ
*/ 0~A#>R'
public class SortUtil { eb:A1f4L
public final static int INSERT = 1; <>&=n+i
public final static int BUBBLE = 2; {eZ{]
public final static int SELECTION = 3; L&2u[ml
public final static int SHELL = 4; fjz) Gp
public final static int QUICK = 5; <lwuTow
public final static int IMPROVED_QUICK = 6; %IZ)3x3l
public final static int MERGE = 7; l[h'6+o
public final static int IMPROVED_MERGE = 8; Gm8E<iTP
public final static int HEAP = 9; pK_?}~
9(1rh9`=
public static void sort(int[] data) { #*$p-I=
sort(data, IMPROVED_QUICK); !rL<5L
} kEN#u
private static String[] name={ %CH6lY=lI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]?l{j
}; 0%C^8%(x
C0C0GqN,
private static Sort[] impl=new Sort[]{ H'g?llh1J
new InsertSort(), 4cgIEw[6
new BubbleSort(), S>:,z}i
new SelectionSort(), =]>%t]
new ShellSort(), 4*H"Z(HP
new QuickSort(), >%%=0!,yX
new ImprovedQuickSort(), -$k>F#
new MergeSort(), xF8S*,#,*
new ImprovedMergeSort(), _9If/RD
new HeapSort() |7F*MP
}; K'b*A$5o
L4'[XcY
public static String toString(int algorithm){ d"<F!?8
return name[algorithm-1]; [s6C ZcL
} PXYE;*d(
{[OwMk
public static void sort(int[] data, int algorithm) { 1=GI&f2I
impl[algorithm-1].sort(data); kA?_%fi1
} E%pz9gcSx
H oy7RC&
public static interface Sort { {[#(w75R{
public void sort(int[] data); 8n)WW$
} ]r"Yqv3
Zr/r2
public static void swap(int[] data, int i, int j) { 6SEltm(
int temp = data; yY=<'{!
data = data[j]; c[(Pg%
data[j] = temp; nfE@R."A
} _n O.-
} 2<W&\D o@