[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; sWse (_2
} mVS^HQ:
int i1=l; Hr=|xw8.
int i2=mid+1; P9:5kiP H
for(int cur=l;cur<=r;cur++){ THy?Y
if(i1==mid+1) nT01B1/<]
data[cur]=temp[i2++]; %R?WkG
else if(i2>r) &=S:I!9;;
data[cur]=temp[i1++]; `, ]ui*
else if(temp[i1] data[cur]=temp[i1++]; 1D)0\#><
else hMz)l\0
data[cur]=temp[i2++]; `zq+Xl
} z{ M2tLNb
} ' A+L #
>h:'Z*9
} <7)sS<I
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改进后的归并排序: IDf\!QGx
}'}n~cA.{
package org.rut.util.algorithm.support; %${$P+a`D
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import org.rut.util.algorithm.SortUtil; o+8H:7,o'
o,?G(
/** =rZ'!Pa
* @author treeroot ]zAwKuIK
* @since 2006-2-2 u{HO6s\S
* @version 1.0 p<\!{5:
*/ &N=vs
public class ImprovedMergeSort implements SortUtil.Sort { kf<c[su
CvZ\Z472.j
private static final int THRESHOLD = 10; A4rMJ+!5
%A3m%&(m&%
/* w2s06`g
* (non-Javadoc) x8C\&ivn
* 0#=xUk#LP`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dg~lz80
*/ ~a4Y8r
public void sort(int[] data) { rqp]{?33
int[] temp=new int[data.length]; p-\->_9)y`
mergeSort(data,temp,0,data.length-1); 6&;GC<].(y
} KX;JX*)J
?Bq^#i|m
private void mergeSort(int[] data, int[] temp, int l, int r) { 3O-vO=D
int i, j, k; C+M]"{Y+
int mid = (l + r) / 2; j[R.UB3J
if (l == r) S[7^#O.)
return; v,*C>u\3s
if ((mid - l) >= THRESHOLD) g5pFr=NV
mergeSort(data, temp, l, mid); :JX2GRL4
else 5_](N$$
insertSort(data, l, mid - l + 1); Iw.!*0$
if ((r - mid) > THRESHOLD) |cnps$fk~
mergeSort(data, temp, mid + 1, r); 9.xRDk
else #C.
insertSort(data, mid + 1, r - mid); #Ff8_xhP2
}wp/,\_ >
for (i = l; i <= mid; i++) { xk/-TXB 0
temp = data; ;a>u7rw
} W,H8B%e
for (j = 1; j <= r - mid; j++) { KIv_ AMr
temp[r - j + 1] = data[j + mid]; QnP3U
} %x{kd8>u!
int a = temp[l]; / yBrlf
int b = temp[r]; /W*Z.
for (i = l, j = r, k = l; k <= r; k++) { ]&P\|b1*g
if (a < b) { {K"hlu[
data[k] = temp[i++]; O9>$(`@I
a = temp; VJTO:}Q
} else { uY>M3h#qx
data[k] = temp[j--]; $+n6V2^K)7
b = temp[j]; `)cH(Rj
} iSoQ1#MP)2
} XKws_
} u;t~ z
Z|x|8 !D
/** ,m]5j_< }
* @param data Bf#cBI
* @param l }Md;=_TP
* @param i -@_v@]:
*/ Q 318a0
private void insertSort(int[] data, int start, int len) { eBxm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E X'PRNB,
} a9p:k ]{
} bFajK;
} ILAn2W
} )kI**mI}
7p]Izx8][
堆排序： Ic_NQ<8
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package org.rut.util.algorithm.support; w$9LcN
<,GVrVH=t"
import org.rut.util.algorithm.SortUtil; &qdhxc4
A&Aj!#
/** 0mUVa=)D
* @author treeroot g;p} -=
* @since 2006-2-2 ARf{hiV6Wt
* @version 1.0 Kw?3joy
*/ -j]k^
public class HeapSort implements SortUtil.Sort{ ;9h;oB@
7`A]X,:
/* (non-Javadoc) D@68_sn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O8bxd6xb
*/ KfBT'6t
public void sort(int[] data) { J=$\-
MaxHeap h=new MaxHeap(); TE+>|}]R
h.init(data); J@$~q}iG
for(int i=0;i h.remove(); !*"fWahv
System.arraycopy(h.queue,1,data,0,data.length); aif;h! ?y
} /A-WI x
:(X3?%
private static class MaxHeap{ u)<s*jk
-c0ypz
void init(int[] data){ 7>j~;p{
this.queue=new int[data.length+1]; 5a_8`csu
for(int i=0;i queue[++size]=data; CKK}Z;~:
fixUp(size); ]r|oNGD)G
} :[_msd
} $+7uB-KsU
'-RacNY
private int size=0; }}tbOD)t
< z2wt
private int[] queue; nDC0^&
Su2{nNC>
public int get() { -%yrs6
return queue[1]; 9|}Pf_5]%[
} }/vW"&h-
Yjjh}R#
public void remove() { <R@,wzK
SortUtil.swap(queue,1,size--); edq,:
fixDown(1); eyyME c!
} bqAW
file://fixdown [#q>Aq$11
private void fixDown(int k) { V9v20iX
int j; XhM!pSl\
while ((j = k << 1) <= size) { pzz*>Y
if (j < size %26amp;%26amp; queue[j] j++; I!S Eb
if (queue[k]>queue[j]) file://不用交换 !>`Fg>uy
break; JaRsm'SIk~
SortUtil.swap(queue,j,k); _&#{cCo:
k = j; R03 Te gwA
} G7nhUg
} [ncK+rGAc
private void fixUp(int k) { !&rd#ZBn
while (k > 1) { ~pQN#C)CO>
int j = k >> 1; MWh Y&I+
if (queue[j]>queue[k]) 'V]&X.=zC
break; "GK9Y
SortUtil.swap(queue,j,k); ^E.L8
k = j; !o /=,ZIx
} 1Hr}n6s
} 22CET9iCe
+GI906K
} 6UeYZ g
R{H[< s+n
} e(?w h
O1z]d3x
SortUtil： 'f-r 6'_ZX
06S R74
package org.rut.util.algorithm; ~Ba=nn8Cq
:D)(3U5
import org.rut.util.algorithm.support.BubbleSort; gQ>kDl^$Ls
import org.rut.util.algorithm.support.HeapSort; HYfGu1j?X
import org.rut.util.algorithm.support.ImprovedMergeSort; fgdR:@]-
import org.rut.util.algorithm.support.ImprovedQuickSort; wu)+n\mt'
import org.rut.util.algorithm.support.InsertSort; EsMX#1>/m
import org.rut.util.algorithm.support.MergeSort; lhGJ/By- -
import org.rut.util.algorithm.support.QuickSort; Kgu8E:nL
import org.rut.util.algorithm.support.SelectionSort; I x%>aee
import org.rut.util.algorithm.support.ShellSort; kUf i
Cd}^&z
/** e|\xFV=4
* @author treeroot gA!@oiq@
* @since 2006-2-2 i7Up AHd/
* @version 1.0 }uZs)UQ|$
*/ y QW7ng7D0
public class SortUtil { S<"Fp1#"l
public final static int INSERT = 1; f82%nT
public final static int BUBBLE = 2; [k6I#v<&
public final static int SELECTION = 3; SeD}H=,@
public final static int SHELL = 4; -&5YRfr!
public final static int QUICK = 5; aTuu",f
public final static int IMPROVED_QUICK = 6; -fq
public final static int MERGE = 7; K($l>PB,y@
public final static int IMPROVED_MERGE = 8; cq4~(PXTg
public final static int HEAP = 9; W,<q!<z\t
!!y]pMjJa@
public static void sort(int[] data) { t}YcB`q)
sort(data, IMPROVED_QUICK); ?*fY$93O
} vk92j?
private static String[] name={ b6N[t _,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S(zp_
}; ;Bs~E
C`[<6>&y
private static Sort[] impl=new Sort[]{ 8:,($a/KF
new InsertSort(), kFn/dQ4|
new BubbleSort(), m4mE7Wn.3
new SelectionSort(), O[Vet/^)
new ShellSort(), MuoE~K2
new QuickSort(), <\^0!v
new ImprovedQuickSort(), QqA=QTZ}
new MergeSort(), rAH!%~
new ImprovedMergeSort(), bhqSqU}6~
new HeapSort() h_%q`y,
}; .^Sglo
heVkCM :
public static String toString(int algorithm){ "v8p<JfB`
return name[algorithm-1]; V?uT5.B2
} @+gr/Pul^
7~Y\qJ4b
public static void sort(int[] data, int algorithm) { MCKN.f%lP
impl[algorithm-1].sort(data); g#J`7n
} PI9,*rOy
{&=+lr_h?
public static interface Sort { YB38K(
public void sort(int[] data); TN(Vzs%
} $UR:j8C{p$
&93{>caf+
public static void swap(int[] data, int i, int j) { o,6t:?Z
int temp = data; 0k]ApW
data = data[j]; ?jmP]MM
data[j] = temp; DrK]U}3fh"
} xXe3E&
} @^{`!>Vt