[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; (w`_{%T
} 0>"y)T3
int i1=l; N!Xn)J
int i2=mid+1; %0({MU
for(int cur=l;cur<=r;cur++){ q,OCA\
if(i1==mid+1) *,)1Dcv(
data[cur]=temp[i2++]; {{)pb>E
else if(i2>r) M,cz7,
data[cur]=temp[i1++]; IR?nH`V
else if(temp[i1] data[cur]=temp[i1++]; >QPCYo<E
else ]bbP_n8
data[cur]=temp[i2++]; w4R~0jXy
} ti3S'K0t
} }S4+1 U3
%L$?Mey
} 8w#4T:hsuN
7#N ?{3i
改进后的归并排序: "Xl"H/3r
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package org.rut.util.algorithm.support; O_ vH w^
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import org.rut.util.algorithm.SortUtil; p<&>1}j=
WEoD?GLS8
/** 8Pva]Q
* @author treeroot 7jr+jNsowj
* @since 2006-2-2 hu7oJ H
* @version 1.0 8Q0/kG
*/ +:Nz_l
public class ImprovedMergeSort implements SortUtil.Sort { +U>Y.YP
9{rE7OX*A
private static final int THRESHOLD = 10; F6\4[B
ZXf&pqmG
/* fF2]7:
* (non-Javadoc) tv2k&\1
* ` +)Bl%*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jkAru_C
*/ `=Rxnl,<U
public void sort(int[] data) { r9<#R=r)}J
int[] temp=new int[data.length]; !| q19$
mergeSort(data,temp,0,data.length-1); ~Q]/=HK
} mE'HRv
s#aane
private void mergeSort(int[] data, int[] temp, int l, int r) { xgtx5tg
int i, j, k; ~S<}q6H.
int mid = (l + r) / 2; i[wnG)
if (l == r) :f7:@8
return; 1;!dTh
if ((mid - l) >= THRESHOLD) Pa=xc>m^
mergeSort(data, temp, l, mid); L>lxkq8!Q
else eT?vZH[N
insertSort(data, l, mid - l + 1); `uqe[u;`6
if ((r - mid) > THRESHOLD) k^#*x2b
mergeSort(data, temp, mid + 1, r); 4^9qs%&
else >wR)p\UEb
insertSort(data, mid + 1, r - mid); iG"1~/U
E_P,>f
for (i = l; i <= mid; i++) { Pj*]%V
temp = data; |h&okR+_,
} JUJrtKS
for (j = 1; j <= r - mid; j++) { 32pPeYxB!-
temp[r - j + 1] = data[j + mid]; bxWzm|
} K.Cx 9
int a = temp[l]; [#AI!-
int b = temp[r]; 7\H_9o0$
for (i = l, j = r, k = l; k <= r; k++) { 1c*:" k
if (a < b) { twt's,dO
data[k] = temp[i++]; WpMm%G~'4t
a = temp; '5A&c(
} else { _bv9/#tR
data[k] = temp[j--]; z uo:yaO
b = temp[j]; KI].T+I
} !Q}Bz*Y
} 3ly]DTbz
} P%d3fFzK
WDr=+=Zj
/** {cjp8W8hS
* @param data ?B`c<H"
* @param l .3wx}!:*|
* @param i .3SP#mI
*/ ! GtF%V
private void insertSort(int[] data, int start, int len) { -I z,vd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TxKNDu
} *ozXilO
} ;Y`8Ee4vH
} !u/c'ZLZ>
} i-4?]h k
OLGMy5
堆排序： @Y ?p-&
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package org.rut.util.algorithm.support; VkId6k:>6C
M"Z/E>ne
import org.rut.util.algorithm.SortUtil; DD6K[\
6aWNLJ@
/** %][zn$aa|
* @author treeroot 9U@>&3[v
* @since 2006-2-2 6I|9@~!y[
* @version 1.0 f%P#.
*/ w;kiH+&
public class HeapSort implements SortUtil.Sort{ >#`{(^
z)R\WFBW
/* (non-Javadoc) gEmsPk,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gRw? <U^
*/ #wGOlW;R
public void sort(int[] data) { [t*-s1cq
MaxHeap h=new MaxHeap(); @# .a5
h.init(data); roIc1Ax:
for(int i=0;i h.remove(); !nQoz^_`P
System.arraycopy(h.queue,1,data,0,data.length); bkm:#K
} 51;Bc[)%
eMP0BS"
private static class MaxHeap{ Bi0&F1ZC!
vCtnjWGX}/
void init(int[] data){ \.F|c
this.queue=new int[data.length+1]; ;Wn0-`_1,
for(int i=0;i queue[++size]=data; y+7A?"s)
fixUp(size); "rrE_
} iE]^6i
} @y|JIBBRc
\Awqr:A&
private int size=0; !$Arc^7r
w-Q=oEt
private int[] queue; R78P](1\>
!OOOc
public int get() { ~`0=-Qkd
return queue[1]; ("=B,%F_
} A8ClkLC;I
JaN53,&<
public void remove() { 7+$P6[*
SortUtil.swap(queue,1,size--); n]K{-C;
fixDown(1); "&\]1A}Z-x
} {!pYQ|#
file://fixdown y)7;"3Q<
private void fixDown(int k) { = d!YM6G
int j; C`aUitL}
while ((j = k << 1) <= size) { OjK+`D_C
if (j < size %26amp;%26amp; queue[j] j++; Tq%##
if (queue[k]>queue[j]) file://不用交换 ~-A"M_n ?
break; =05jjR1
SortUtil.swap(queue,j,k); Qqp=
k = j; :x!'Eer n
} )r XUJ29.
} <fDbz1Q;l
private void fixUp(int k) { 3\|PwA9fN8
while (k > 1) { f/Q/[2t
int j = k >> 1; *[b~2
if (queue[j]>queue[k]) \obM}caT
break; 4@@gC&:Y
SortUtil.swap(queue,j,k); FCChB7c`
k = j; *{=q:E$
} Emv9l~mIu
} ]/Cu,mX
)+a]M1j
} }5u;'>$
?cD_\~
} "@itn
nwJc%0
SortUtil： ?Lr:>
l YjPrA]TC
package org.rut.util.algorithm; {HP.HK
G+NTn\
import org.rut.util.algorithm.support.BubbleSort; 7K/t>QrBtU
import org.rut.util.algorithm.support.HeapSort; 92^Dn`g
import org.rut.util.algorithm.support.ImprovedMergeSort; ?9z1'6
import org.rut.util.algorithm.support.ImprovedQuickSort; aY%{?8PsB
import org.rut.util.algorithm.support.InsertSort; #o(@S{(NZ
import org.rut.util.algorithm.support.MergeSort; +F^X1
import org.rut.util.algorithm.support.QuickSort; mXUe/*r0T
import org.rut.util.algorithm.support.SelectionSort; &G7@lz@sK+
import org.rut.util.algorithm.support.ShellSort; lH>6;sE
9YwS"~Q =w
/** =jvN8R*[
* @author treeroot ^;cJjl'=
* @since 2006-2-2 Kxsj_^&|i
* @version 1.0 K$-|7tJon
*/ 22D,,nC0+=
public class SortUtil { 5pq9x4&
public final static int INSERT = 1; l i2/"~l
public final static int BUBBLE = 2; "IoY$!Hk
public final static int SELECTION = 3; p5bM/{DP;K
public final static int SHELL = 4; z2SR/[I?
public final static int QUICK = 5; _/F}y[B7d
public final static int IMPROVED_QUICK = 6; d)v!U+-|'
public final static int MERGE = 7; WZ ,t~TN
public final static int IMPROVED_MERGE = 8; mz^[C7(q'(
public final static int HEAP = 9; /O$)m[
NqN9
public static void sort(int[] data) { 83:qIfF
sort(data, IMPROVED_QUICK); KI5099_/
} lDG.\u
private static String[] name={ Y= ^o {C6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" = 8\'AU
}; N<|-b0#Z6
mCEWp
private static Sort[] impl=new Sort[]{ [&{NgUgu"
new InsertSort(), 21\?FQrz
new BubbleSort(), )H1chNI)
new SelectionSort(), eRIdN(pP
new ShellSort(), 9q"G g?
new QuickSort(), h>"Z=y
new ImprovedQuickSort(), cP8@'l@!
new MergeSort(), Ijs=4f
new ImprovedMergeSort(), Nv\<>gA:
new HeapSort() GoG_4:^#h
}; $I90KQB\_
A|P `\_
public static String toString(int algorithm){ b'4r5@GO
return name[algorithm-1]; #pX+~{
} 'Ie!%k^
-o sxKT:
public static void sort(int[] data, int algorithm) { .t{?doOT
impl[algorithm-1].sort(data); .n)0@X!
} %gXNWxv
Y^uYc}
public static interface Sort { c]:@y"W5$
public void sort(int[] data); IeJ@G)
} "C [uz&
]\:l><
public static void swap(int[] data, int i, int j) { PX,fg5s\b
int temp = data; "yxBD 7
data = data[j]; e irRAU
data[j] = temp; c# WIB 4
} )hK1W\5
} s B!2't