[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; a@AIv"q
} RjR+'<7E^
int i1=l; E>:#{%
int i2=mid+1; 'e6J&X
for(int cur=l;cur<=r;cur++){ WEoD?GLS8
if(i1==mid+1) 8Pva]Q
data[cur]=temp[i2++]; 7jr+jNsowj
else if(i2>r) hu7oJ H
data[cur]=temp[i1++]; 2@Q5Ta#h
else if(temp[i1] data[cur]=temp[i1++]; ].Ra=^q
else .krEfY&
data[cur]=temp[i2++]; LoOw]@>
} z@~mu
} 99%R/m
C' WX$!$d
} 3lKs>HE0
/>uE)R$
改进后的归并排序: /7ShE-.5#
-=n!k^?lK
package org.rut.util.algorithm.support; EpTc{
o5YL_=7m
import org.rut.util.algorithm.SortUtil; ||fCY+x*8
>>M7#hmt
/** ,s6lB0
* @author treeroot B,` `2\B
* @since 2006-2-2 N7GZ'-t^Er
* @version 1.0 HdTB[(
*/ b8[ ayy
public class ImprovedMergeSort implements SortUtil.Sort { sxdDI?W4
ma/<#l^}
private static final int THRESHOLD = 10; r=xec@R]*
ys:F
/* )`2ncb
* (non-Javadoc) - ^Y\'y2
* :G=ol2Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e&K7n@
*/ r1z+yx
public void sort(int[] data) { m:k;?p:x
int[] temp=new int[data.length]; [.$/o}
mergeSort(data,temp,0,data.length-1); p9!jM\(
} ')iyD5/4
%|ioNXMu
private void mergeSort(int[] data, int[] temp, int l, int r) { UMMGT6s,E8
int i, j, k; IR&b2FTcU
int mid = (l + r) / 2; 6BZi4:PDx
if (l == r) 7#*`7 K'P!
return; Fh&USn"
if ((mid - l) >= THRESHOLD) y'<5P~W!a
mergeSort(data, temp, l, mid); V0*MY{x#S
else {IF$\{Al
insertSort(data, l, mid - l + 1); iQgr8[ SFf
if ((r - mid) > THRESHOLD) <p?oFD_e4
mergeSort(data, temp, mid + 1, r); HcV,r,>e
else M+)ENve
insertSort(data, mid + 1, r - mid); #%/Jr 52<
\K lY8\c[
for (i = l; i <= mid; i++) { S2 P9C"
temp = data; Q91mCP~$
} 8M]QDgd.
for (j = 1; j <= r - mid; j++) { OLGMy5
temp[r - j + 1] = data[j + mid]; {@'#|]4y.
} VkId6k:>6C
int a = temp[l]; h?fp(
int b = temp[r]; -k%|sqDZj
for (i = l, j = r, k = l; k <= r; k++) { q6o}2<T@
if (a < b) { p77=~s
data[k] = temp[i++]; '*`1uomeo
a = temp; zQB1C
} else { oHF,k
data[k] = temp[j--]; 4F!%mMq
b = temp[j]; <2LUq@Pg
} > lI2r}
} /8,cF7XL*
} &x@N5j5Q
sqj8I"<`
/** B9`_~~^U5
* @param data Ss1&fZoj
* @param l &O5&pet
* @param i fAR6
*/ }{[p<pU$C
private void insertSort(int[] data, int start, int len) { ++!0r['+>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sD6vHX%
} }kJ9<h,
} ,0?3k
} qg*xdefQ%
} xj5MKX{CJT
DtZ7UX\P
堆排序： m$g{&
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package org.rut.util.algorithm.support; ;9)=~)
yJ(ITJE_Z
import org.rut.util.algorithm.SortUtil; "msPH<D
w-Q=oEt
/** R78P](1\>
* @author treeroot !OOOc
* @since 2006-2-2 /~g.j1g
* @version 1.0 d:hX3
*/ +('=RyoT
public class HeapSort implements SortUtil.Sort{ J|8 u
JK'tdvs~
/* (non-Javadoc) [h.i,%Ua"P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zj)A%WTD,
*/ Xx^v%[!`+
public void sort(int[] data) { Gd|jE
MaxHeap h=new MaxHeap(); ciN*gwI)
h.init(data); ko~e*31_E
for(int i=0;i h.remove(); JNI&]3[C>?
System.arraycopy(h.queue,1,data,0,data.length); xfqU atC
} zB6&),[,v
9"dZ4{\!
private static class MaxHeap{ //#]CsFiP
!!])~+4pP
void init(int[] data){ $ \ I|6[P
this.queue=new int[data.length+1]; i>=y3x"
for(int i=0;i queue[++size]=data; C1-Jj_XQ.
fixUp(size); nd h\+7
} pQ`S%]k.<
} p0pA|
v5L#H=P
private int size=0; TezwcFqH
Xs)?PE[
private int[] queue; )!sjXiC!h
?!bA#aSbl5
public int get() { T6=~vOzTJ
return queue[1]; <7j"CcJzZ
} GJBMaT
K3`48,`?wA
public void remove() { %:Zp7O2UB'
SortUtil.swap(queue,1,size--); Rts}y:44
fixDown(1); |(5|6r3
} fBPJ8VY
file://fixdown 92^Dn`g
private void fixDown(int k) { ?9z1'6
int j; aY%{?8PsB
while ((j = k << 1) <= size) { #o(@S{(NZ
if (j < size %26amp;%26amp; queue[j] j++; (y2P."
if (queue[k]>queue[j]) file://不用交换 ::Pf\Lb>
break; sP%J`L@h
SortUtil.swap(queue,j,k); Rm@F9D[,
k = j; @SAJ*hfb0
} JL?|NV-
} ]iaQD _'\
private void fixUp(int k) { ,u
while (k > 1) { >yr3C
int j = k >> 1; bE"J&;|
if (queue[j]>queue[k]) 5pq9x4&
break; 7zu3o
SortUtil.swap(queue,j,k); O9:J ^g
k = j; A~'p~@L
} ^NO;A=9b[
} 1<wolTf
L$; gf_L
} d)v!U+-|'
WZ ,t~TN
} >fgV!o4
wM#q [m;
SortUtil： _;k))K^
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package org.rut.util.algorithm; L%f$ &
w1t0X{
import org.rut.util.algorithm.support.BubbleSort; !)uXCg9U
import org.rut.util.algorithm.support.HeapSort; D o!]t7Y$
import org.rut.util.algorithm.support.ImprovedMergeSort; Q8bn|#`
import org.rut.util.algorithm.support.ImprovedQuickSort; 6hqqZ
import org.rut.util.algorithm.support.InsertSort; T!Uf PfEI
import org.rut.util.algorithm.support.MergeSort; \LDcIK=
import org.rut.util.algorithm.support.QuickSort; Wu693<
import org.rut.util.algorithm.support.SelectionSort; P)hawH=
import org.rut.util.algorithm.support.ShellSort; x_x|D|@wM
9q"G g?
/** h>"Z=y
* @author treeroot cP8@'l@!
* @since 2006-2-2 Ijs=4f
* @version 1.0 _P{v=`]Eu
*/ f{#Mc
public class SortUtil { ,CnUQx0
public final static int INSERT = 1; /Pa<I^-#
public final static int BUBBLE = 2; 90+Hv:wF
public final static int SELECTION = 3; avH3{V
public final static int SHELL = 4; Bh!J&SM:
public final static int QUICK = 5; ^r~R]stE^
public final static int IMPROVED_QUICK = 6; i<{/r-w=E
public final static int MERGE = 7; Z/I`XPmk
public final static int IMPROVED_MERGE = 8; 'a enhj
public final static int HEAP = 9; K?mly$
QK`2^
public static void sort(int[] data) { "4i_}
sort(data, IMPROVED_QUICK); (OHd}YQ
} n`7n5M*
private static String[] name={ ,NQ>,}a0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x:IY6 l
}; pPZ^T5-ks
0mR
private static Sort[] impl=new Sort[]{ 2)>Ty4*
new InsertSort(), LY(h>`
new BubbleSort(), zy[|4Q(?
new SelectionSort(), |c!lZo/
new ShellSort(), 7.xJ:r|
new QuickSort(), R)qK{wq(1E
new ImprovedQuickSort(), \fD[Ej
new MergeSort(), r#K"d
new ImprovedMergeSort(), 58_aI?~>>
new HeapSort() ki|w?0s
}; j_~lc,+m
'#x<Fo~hT
public static String toString(int algorithm){ Q$DF3[NC
return name[algorithm-1]; [KwwhI@3
} QjwCY=PK!
{m<!-B95
public static void sort(int[] data, int algorithm) { @GE:<'_:{
impl[algorithm-1].sort(data); l ~ /y
} \{`*`WQF
K?aUIkVs
public static interface Sort { V3}$vKQ
public void sort(int[] data); =6+j Po{F
} UHUO9h
rzgzX
public static void swap(int[] data, int i, int j) { `o!a RX
int temp = data; RlTVx:
data = data[j]; )ur&Mnmm
data[j] = temp; j<*`?V^
} 64qQ:D7C
} Yg14aKZl