[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(}S~
} +3si=x\=/
int i1=l; [5)1 4% x
int i2=mid+1; '3[Ecy#
for(int cur=l;cur<=r;cur++){ dI>)4()
if(i1==mid+1) SN?jxQ
data[cur]=temp[i2++]; Tl8S|Rg
else if(i2>r) e1~C>
data[cur]=temp[i1++]; z|+L>O-8
else if(temp[i1] data[cur]=temp[i1++]; o7/_a/
else 7g
data[cur]=temp[i2++]; m?;)C~[
} "Z&qOQg%3
} =bN[TD
zi-zg Lx
} P:(,l,}F8
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改进后的归并排序: M`BD]{tN}
6x*ImhQ.J
package org.rut.util.algorithm.support; HQt=.#GW
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import org.rut.util.algorithm.SortUtil; mC>7l7%
Va(R*38k
/** =zqOkC h$
* @author treeroot PS`)6yn{_
* @since 2006-2-2 ghbxRnU}
* @version 1.0 n$5,B*
*/ a3HT1!M)
public class ImprovedMergeSort implements SortUtil.Sort { &p8K0 |
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private static final int THRESHOLD = 10; MCL?J,1?r
P~ffgzP
/* ^q FFF3<8
* (non-Javadoc) >I]t|RT])
* Z7k {7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5y}}?6n+
*/ "JJ )w0
public void sort(int[] data) { aODOc J N
int[] temp=new int[data.length]; |;OM,U2
mergeSort(data,temp,0,data.length-1); 1@CI7j
} ?Q9/C|
,GVHwTZ0`
private void mergeSort(int[] data, int[] temp, int l, int r) { ^YenS6`F
int i, j, k; FK@rZP
int mid = (l + r) / 2; j\@s pbE@
if (l == r) iknBc-TLD
return; 9Hlu%R
if ((mid - l) >= THRESHOLD) hd/5*C{s
mergeSort(data, temp, l, mid); 9p2"5x
else ,8+SQo#3
insertSort(data, l, mid - l + 1); p8Lb*7W
if ((r - mid) > THRESHOLD) )"t=sFxaB
mergeSort(data, temp, mid + 1, r); _)2NFq
else wC@4`h\U
insertSort(data, mid + 1, r - mid); :ozHuHJ#
D~NH 4B
for (i = l; i <= mid; i++) { dfc-#I p?
temp = data; FEU$D\1y
} Lkqu"V
for (j = 1; j <= r - mid; j++) { [rqq*_eB
temp[r - j + 1] = data[j + mid]; lQi2ym?
} f+fF5Z\
int a = temp[l]; ?ohLcz
int b = temp[r]; f[%\LHq
for (i = l, j = r, k = l; k <= r; k++) { 1ww|km
if (a < b) { &vdGKYs 6
data[k] = temp[i++]; p7zHP
a = temp; :Gy .P
} else { ;Jv)J3y
data[k] = temp[j--]; lG fO
b = temp[j]; =!{}:An1$
} UupQ*,dJ
} )c]GgPH
} Gp@Y=mU
8 l}tYl`|
/** | 2p\M?@
* @param data sl |S9Ix
* @param l o)"}DeV$&
* @param i 84)S0Y8w
*/ 4?jhZLBU
private void insertSort(int[] data, int start, int len) { OaU} 9&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t(p
} ?kE2S6j5
} *=^_K`y
} I[tU}ojP
} +vDT^|2SF
}-: d*YtK
堆排序： () b0Sh=
=*8"ci$
package org.rut.util.algorithm.support; !QcgTW)T
~z32%k
import org.rut.util.algorithm.SortUtil; >=C)\Yfu)
XRP/E_4
/** d@,q6R}!MP
* @author treeroot C:EF(/>+-
* @since 2006-2-2 7-W(gD!`
* @version 1.0 PJO;[: .I
*/ d 'x;]#S
public class HeapSort implements SortUtil.Sort{ L?Wl#wP\;*
`1M_rG1/+
/* (non-Javadoc) R;I}#b cJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O=c&
*/ sE>'~+1_O
public void sort(int[] data) { ,2&'8:B
MaxHeap h=new MaxHeap(); 8'`&f&
h.init(data); >%Y.X38Z[
for(int i=0;i h.remove(); O!Mm~@MoA
System.arraycopy(h.queue,1,data,0,data.length); .u W_(Rqg
} 7@+0E2'
%4n=qK9T5
private static class MaxHeap{ 'Nfg%)-N
1D=My1B
void init(int[] data){ GbB&kE3KP
this.queue=new int[data.length+1]; Haq23K
for(int i=0;i queue[++size]=data; eUF PzioW
fixUp(size); IQ2<Pinv
} ELY$ ]^T
} JK,#dA#
RR`?o\
private int size=0; yU .B(|
~@itZ,d\
private int[] queue; {) Y &Vr5
tH>%`:
public int get() { V+Cb.$@
return queue[1]; My)}oN7\z
} 6JK;]Ah
=YLt?5|e
public void remove() { 4~Lw:o1a
SortUtil.swap(queue,1,size--); sI*( MhU
fixDown(1); Z!LzyCVl
} Lc<Gny^
file://fixdown F!zZIaB]
private void fixDown(int k) { ,aawtdt/
int j; Ix1ec^?f
while ((j = k << 1) <= size) { Zh3]bg5
if (j < size %26amp;%26amp; queue[j] j++; LNg[fF^:
if (queue[k]>queue[j]) file://不用交换 }c&Zv#iO6
break; $5il]D`
SortUtil.swap(queue,j,k); }"q1B
k = j; eYsO%y\I
} W{Nhh3
} '-W p|A
private void fixUp(int k) { ]Ms~;MXlx5
while (k > 1) { zg8m(=k'
int j = k >> 1; IXd&$h]Lq
if (queue[j]>queue[k]) ~jF5%Gu
break; r"5]U`+
SortUtil.swap(queue,j,k); $2;YJjz(
k = j; n-H0cm
} H3`%#wQ0j
} J fsCkS
!H?#~{ W}
} jZm1.{[>
cC4*4bMm
} y6:=2(]w<p
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SortUtil： {/#?n["
atl0#FBd
package org.rut.util.algorithm; IGv>0LOd@
V4VTP]'n
import org.rut.util.algorithm.support.BubbleSort; d&R/fIm
import org.rut.util.algorithm.support.HeapSort; I&>R]DV
import org.rut.util.algorithm.support.ImprovedMergeSort; y1k""75
import org.rut.util.algorithm.support.ImprovedQuickSort; dzbzZ@y
import org.rut.util.algorithm.support.InsertSort; Mc76)
import org.rut.util.algorithm.support.MergeSort; xwK<f6H!y
import org.rut.util.algorithm.support.QuickSort; Y*J`Wf(w
import org.rut.util.algorithm.support.SelectionSort; d/R:-{J)c
import org.rut.util.algorithm.support.ShellSort; 9RR1$( f
~^Vt)/}Q
/** rl4daV&,U
* @author treeroot kw=+"U
* @since 2006-2-2 A:NsDEt
* @version 1.0 7cvbYP\<lv
*/ sVh!5fby&
public class SortUtil { $7|0{Dw
public final static int INSERT = 1; w="I*7c@
public final static int BUBBLE = 2; n%"s_W'E
public final static int SELECTION = 3; ,`-6!|:
public final static int SHELL = 4; ~rn82an@G
public final static int QUICK = 5; )G*Hl^Z;4
public final static int IMPROVED_QUICK = 6; eJ7A.O
public final static int MERGE = 7; 3n6_yK+D
public final static int IMPROVED_MERGE = 8; *h-nI=
public final static int HEAP = 9; )5yZSdA
c#CX~
public static void sort(int[] data) { 2psLX
sort(data, IMPROVED_QUICK); ,F:l?dfB\I
} qx`*]lX
private static String[] name={ ,Sz*]X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /H!I90
}; M-|4cd]6
'lIT7MK
private static Sort[] impl=new Sort[]{ :/Sx\Nz78
new InsertSort(), )(75dUl
new BubbleSort(), 7b'XQ/rs
new SelectionSort(), }tj@*n_
new ShellSort(), a*%>H(x
new QuickSort(), Ce`{M&NSWX
new ImprovedQuickSort(), Oo=}j
new MergeSort(), o?hya.;h4
new ImprovedMergeSort(), D%Pq*=W
new HeapSort() PlBT H
}; qIO)Z
fE_QB=9 cz
public static String toString(int algorithm){ ApS/,cV
return name[algorithm-1]; ^5"s3Qn
} W@pVP4F0xM
2/>AmVM
public static void sort(int[] data, int algorithm) { ,v)@&1Wh:
impl[algorithm-1].sort(data); .sjM$#V=
} z@<`]
0v',+-
public static interface Sort { ]S%qfna e1
public void sort(int[] data); F=d#$-yg
} CS6,mX
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public static void swap(int[] data, int i, int j) { 5:56l>0
int temp = data; MdEZ839J
data = data[j]; Xg.\B1d
data[j] = temp; r7w&p.?
} >Qt#6X|
} /r}t