[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; 5!wjYQt3
} cmYzS6f,7
int i1=l; VD $PoP
int i2=mid+1; gv&Hu$ca
for(int cur=l;cur<=r;cur++){ )Jw$&%/{1
if(i1==mid+1) Y9 Bk$$#\
data[cur]=temp[i2++]; xT( pB-R
else if(i2>r) /XA*:8~!
data[cur]=temp[i1++]; fh66Gn,
else if(temp[i1] data[cur]=temp[i1++]; 4#t=%}
else Gm> =s
data[cur]=temp[i2++]; I~E&::,
} |Om9(xT
} D><^7nr%
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} ug'^$geM
9 &Ry51
改进后的归并排序: kpy)kS
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package org.rut.util.algorithm.support; ;5
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import org.rut.util.algorithm.SortUtil; i7rk%q
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/** KxBvL[/
* @author treeroot Bk@EQdn
* @since 2006-2-2 :c Er{U8
* @version 1.0 ?%lfbZ
*/ {9) HB:
public class ImprovedMergeSort implements SortUtil.Sort { {%RwZ'
hFan$W$
private static final int THRESHOLD = 10; '*Tt$0#o
kIe)ocJg
/* qv>l
* (non-Javadoc) Eg2SC?5
* {lUaN0O:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z0v&AD=
*/ Zlt,Us`
public void sort(int[] data) { iSfRo31
int[] temp=new int[data.length]; b_u; `^
mergeSort(data,temp,0,data.length-1); e2>AL
} >5TXLOYZ
!w0=&/Y{R
private void mergeSort(int[] data, int[] temp, int l, int r) { %h;1}SFl0
int i, j, k; TTWiwPo59
int mid = (l + r) / 2; |+JC'b?,
if (l == r) ccx0aC3@I
return; bj_/
if ((mid - l) >= THRESHOLD) Z.rhM[*+0C
mergeSort(data, temp, l, mid); >z%WW&Z'
else ~BE=z:
insertSort(data, l, mid - l + 1); :~ &#9
if ((r - mid) > THRESHOLD) tO D}&
mergeSort(data, temp, mid + 1, r); S)'&+HamI
else ELg$tc
insertSort(data, mid + 1, r - mid); sXT8jLIf
+tG'
for (i = l; i <= mid; i++) { \.GA"_y
temp = data; 1=z\,~b
} CL?=j| Ea
for (j = 1; j <= r - mid; j++) { &Z9rQH81f>
temp[r - j + 1] = data[j + mid]; Po.by~|
} e? |4O<@
int a = temp[l]; 1zCgPiAem
int b = temp[r]; CHjm7
for (i = l, j = r, k = l; k <= r; k++) { ,w=u?
if (a < b) { 6\VZ6oS
data[k] = temp[i++]; eOfVBF<C2
a = temp; J$T(p%
} else { G,1g~h%I$
data[k] = temp[j--]; }I#_H
b = temp[j]; |TF6&$>d
} !kH 1|
} cFq2 6(e
} \JCpwNT{P
H =&K_
/** V^>< =DNE
* @param data YM.
* @param l uu>R)iTQ%S
* @param i ; 0M"T[c
*/ SP>&+5AydX
private void insertSort(int[] data, int start, int len) { N-Bw&hEZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K!2%8Ej,J
} w6-<HPW<S
} |0X~D}r|J
} ta'wX
} 0bSnD|#I
rd=+[:7L
堆排序： Gq%,'amf
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package org.rut.util.algorithm.support; :KGPQ@:O
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import org.rut.util.algorithm.SortUtil; 5aXE^.`
`7?EE1o
/** o!c~"
* @author treeroot 'TA !JB+
* @since 2006-2-2 m6A\R KJ'
* @version 1.0 6.[3N~pq
*/ ;hEeFJ=/G
public class HeapSort implements SortUtil.Sort{ 1F+JyZK}w
)@=fGNDt
/* (non-Javadoc) am7~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yb0Mn*X+ N
*/ P{: 5i%qC
public void sort(int[] data) { k%aJ%(
MaxHeap h=new MaxHeap(); SO<9?uk.
h.init(data); hrXk7}9
for(int i=0;i h.remove(); o]GZq..
System.arraycopy(h.queue,1,data,0,data.length); I\Cg-&e
} "{2niBx
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private static class MaxHeap{ ~]n=TEJ>
1qm*#4x
void init(int[] data){ 9;L8%T (
this.queue=new int[data.length+1]; K<50>uG
for(int i=0;i queue[++size]=data; r8[)Ccv
fixUp(size); XK)0Mt\
} k[@/N+;")`
} ~]'yUd1gSZ
gg Nvm
private int size=0; Yn0iu$;n
:-(qqC:
private int[] queue; .SNg2.
EW+QVu@
public int get() { 0\!v{A> I'
return queue[1]; )HX(-"c
} Y.#fpG'
10bv%ZX7
public void remove() { 8PWEQ<ev7>
SortUtil.swap(queue,1,size--); HK%W7i/k@
fixDown(1); g0-rQA
} )l`VE_(|
file://fixdown 0ZZ Wj%
private void fixDown(int k) { wyLyPJv
int j; J6<O|ng::
while ((j = k << 1) <= size) { /Ba/gq0j
if (j < size %26amp;%26amp; queue[j] j++; *>xCX
if (queue[k]>queue[j]) file://不用交换 6` Aw!&{
break; s%RG_"l
SortUtil.swap(queue,j,k); OGG9f??
k = j; +*aC \4w
} e{*yV#Wl
} ;<nJBZB9u
private void fixUp(int k) { @Qp#Tg<'
while (k > 1) { Gi*_ &
int j = k >> 1; Hxleh><c-
if (queue[j]>queue[k]) ?I\,RiZkz^
break; @Y}G,i
SortUtil.swap(queue,j,k); _>8Q{N\- {
k = j; 4U u`1gtz
} I~;H'7|e
} -zI9E!24
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} <Pi#-r.,
.1_kRy2*.
} \^jRMIM==
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SortUtil： jdx T662q
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package org.rut.util.algorithm; J93xxj
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import org.rut.util.algorithm.support.BubbleSort; #&%>kfeJ)<
import org.rut.util.algorithm.support.HeapSort; i?7?I
import org.rut.util.algorithm.support.ImprovedMergeSort; "b%FkD
import org.rut.util.algorithm.support.ImprovedQuickSort; <;Tr
import org.rut.util.algorithm.support.InsertSort; Z#YNL-x
import org.rut.util.algorithm.support.MergeSort; RdNLf
import org.rut.util.algorithm.support.QuickSort; |IS$Om
import org.rut.util.algorithm.support.SelectionSort; F07X9s44E
import org.rut.util.algorithm.support.ShellSort; p./0N.
aK7}}
/** ~@#a*="
* @author treeroot +d(|Jid
* @since 2006-2-2 iq,rS"
* @version 1.0 e^$JGh2
*/ 15r=d
public class SortUtil { {w7/M]m-
public final static int INSERT = 1; BfD&e`KI
public final static int BUBBLE = 2; \NKQ:F1
public final static int SELECTION = 3; FW|_8q?}<
public final static int SHELL = 4; 9PMIF9"
public final static int QUICK = 5; |--Jd$ dj
public final static int IMPROVED_QUICK = 6; qwO@>wQ}~
public final static int MERGE = 7; N,3iSH=cN[
public final static int IMPROVED_MERGE = 8; cv7:5P
public final static int HEAP = 9; P%N)]b<c*
qB&Je$_uh
public static void sort(int[] data) { dP`B9>r
sort(data, IMPROVED_QUICK); sRqecG(n
} uL^`uI#I
private static String[] name={ 7!\zo mx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |=MhI5gsx
}; vo%"(!
5L_`Fw\l
private static Sort[] impl=new Sort[]{ v G9>e&Be
new InsertSort(), 7R# }AQ
new BubbleSort(), h_SkX@"/-
new SelectionSort(), II!~"-WH
new ShellSort(), =G"ney2
new QuickSort(), K9y~ e
new ImprovedQuickSort(), TPak,h(1
new MergeSort(), ww #kc!'
new ImprovedMergeSort(), 6CSoQ|c{
new HeapSort() j-.Y!$a%6
}; |qz%6w=
f8`dJ5i
public static String toString(int algorithm){ n9n)eI)R
return name[algorithm-1]; GR4DxlX
} ZY@ntV?
P(/eVD#v
public static void sort(int[] data, int algorithm) { J0oeCb
impl[algorithm-1].sort(data); +-,iC6kK
} `uH7~ r^
mCG&=Fx
public static interface Sort { ]}p<P):hO
public void sort(int[] data); O?cU6u;W
} S>S7\b'
=O-irGms*
public static void swap(int[] data, int i, int j) { (z?j{J
int temp = data; -'SA&[7dP
data = data[j]; #qpP37G
data[j] = temp; To5hVL<Ex"
} Z*Gf`d:
} z?( b|v