[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; qmpT G:+
} AoGpM,W]5
int i1=l; _hV34:1F
int i2=mid+1; _)vX_gCi
for(int cur=l;cur<=r;cur++){ ]vcT2lr]
if(i1==mid+1) NaoOgZ?
data[cur]=temp[i2++]; _`=qc/-0
else if(i2>r) V#,|#2otZ
data[cur]=temp[i1++]; ,Zie2I?q
else if(temp[i1] data[cur]=temp[i1++]; *j83E[(]
else :1f,%Z$,q
data[cur]=temp[i2++]; Yl au
} h/C{
} AUF[hzA
do^=Oq07$
} /z^v%l
JQ}4{k
改进后的归并排序: ]EF"QLNN(
tlO=>
package org.rut.util.algorithm.support; [4qvQ7Y !
5D/Td#T04
import org.rut.util.algorithm.SortUtil; ;ja~Q .}4
oD2! [&
/** ?XVE{N
* @author treeroot bh8GP]*E|
* @since 2006-2-2 ]GRVU
* @version 1.0 @)Vb?|3
*/ %Jl6e}!
public class ImprovedMergeSort implements SortUtil.Sort { -TH(Z(pB
am5;B`}q
private static final int THRESHOLD = 10; Rh~j -;
F6CuY$0m=
/* D`41\#ti
* (non-Javadoc) m-C#~Cp36
* !4^Lv{1QZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ye|gW=FUR
*/ 0?FJ~pu
public void sort(int[] data) { G@D8[
int[] temp=new int[data.length]; (oiQ5s^f
mergeSort(data,temp,0,data.length-1); '#A_KHD
} 9BOn8p;yz
p79QEIbk=
private void mergeSort(int[] data, int[] temp, int l, int r) { -[>J"l
int i, j, k; aTHf+;
int mid = (l + r) / 2; .yTo)t
if (l == r) 3k6Dbz
return; ZiKO|U@/
if ((mid - l) >= THRESHOLD) uHf1b?W
mergeSort(data, temp, l, mid); .I{u[ "
else K ..Pn17t
insertSort(data, l, mid - l + 1); l8M}82_
if ((r - mid) > THRESHOLD) dcemF
mergeSort(data, temp, mid + 1, r); 7{"F%`7L
else Z{ YuX
insertSort(data, mid + 1, r - mid); 56c3tgVF
]E:L
for (i = l; i <= mid; i++) { "6WJj3hN
temp = data; kN<;*jHV
} 8=f+`e
for (j = 1; j <= r - mid; j++) { l8Yr]oNkz
temp[r - j + 1] = data[j + mid]; FLsJ<C~/~
} "9c!p
int a = temp[l]; ]EN&EA"<
int b = temp[r]; 5't9/8i
for (i = l, j = r, k = l; k <= r; k++) { U\{I09@E 0
if (a < b) { -{?xl*D
data[k] = temp[i++]; "{S4YA
a = temp; *.$ov<E.
} else { &j'k9C2p
data[k] = temp[j--]; kMzDmgoxNg
b = temp[j]; Eos;7$u[
} iH>JR[A
} b<r*EY
} =RWY0|f
DKlHXEt>
/** 01aw+o
* @param data RM%Z"pc Y6
* @param l mT j
* @param i ]t17= Lr?
*/ }]=A:*jD
private void insertSort(int[] data, int start, int len) { V~.SgbLc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \Ym$to
} 0^2e^qf
} X2~KNw
} Iw$T'I+4W
} w3fD6$
JqN$B\J,
堆排序： NXOvC!<
e \kR/<L
package org.rut.util.algorithm.support; ](ztb)
4Im}!q5;:<
import org.rut.util.algorithm.SortUtil; )OlYz!#?
KJ-Q$ M
/** sdewz(xskj
* @author treeroot v<0S@9~
* @since 2006-2-2 +tlbO?
* @version 1.0 nu|?F\o!
*/ >NpW$P{'
public class HeapSort implements SortUtil.Sort{ @6U&7!
u7p:6W
/* (non-Javadoc) 2<2a3'pG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Np~qtR
*/ h^K>(x
public void sort(int[] data) { m|Z[8Tup
MaxHeap h=new MaxHeap(); i-k(/Y0
h.init(data); 7` XECIh
for(int i=0;i h.remove(); uxq#q1
System.arraycopy(h.queue,1,data,0,data.length); M 8mNeh
} Z\?!&&
ryd}-_LL
private static class MaxHeap{ `AdHyE
ybB<AkYc
void init(int[] data){ ;ov}%t>UD
this.queue=new int[data.length+1]; pAEJ=Te
for(int i=0;i queue[++size]=data; ~3Z(0gujD
fixUp(size); R,zp&L
} 4 >D5t)254
} fG7-07
PO2]x:
private int size=0; r7)iNTQ1
E?mW4?
private int[] queue; .e:+Ek+
NXE1v~9V
public int get() { hn/SS
return queue[1]; Qbj:^{`>(
} P6tJo{l8w
I|mxyyf
public void remove() { k"FY &;G(G
SortUtil.swap(queue,1,size--); Lr>4~1:`
fixDown(1); { lZ<'p
} 1T3YFt@&I
file://fixdown XoiZ"zE
private void fixDown(int k) { nm,Tng oj
int j; m)<N:|
while ((j = k << 1) <= size) { & *&
if (j < size %26amp;%26amp; queue[j] j++; 'Cywn^Ym#
if (queue[k]>queue[j]) file://不用交换 qkyYt#4E
break; u-dF~.x
SortUtil.swap(queue,j,k); E~Y%x/oX
k = j; {O[ !*+O
} 1`n ZK$
} VqB9^qJ]!
private void fixUp(int k) { &cx]7:;
while (k > 1) { w?c~be$
int j = k >> 1; 4_Rv}Yd
if (queue[j]>queue[k]) &-Z#+>=H(
break; :Z5kiEwYM
SortUtil.swap(queue,j,k); >LB x\/
k = j; h6Hop mWVx
} odq3@ ziO
} l_=kW!l
<gr2k8m6$
} _k W:FB
xJ|Z]m=d
} iwEHEi%
YpbJoHiSH
SortUtil： 7o M]qLF
yz=6 V%
package org.rut.util.algorithm; ),I7+rY
[6Nzz]yy
import org.rut.util.algorithm.support.BubbleSort; SB!m&;Tb
import org.rut.util.algorithm.support.HeapSort; o&:n>:im
import org.rut.util.algorithm.support.ImprovedMergeSort; %PU{h
import org.rut.util.algorithm.support.ImprovedQuickSort; qv+}|+aL:
import org.rut.util.algorithm.support.InsertSort; SVyJUd_
import org.rut.util.algorithm.support.MergeSort; =}4lx^`oeT
import org.rut.util.algorithm.support.QuickSort; l'Z `%}R
import org.rut.util.algorithm.support.SelectionSort; mc5$-}1V,
import org.rut.util.algorithm.support.ShellSort; `?Xt ,
}A_>J7w
/** ~f%AbDye
* @author treeroot cE]#23
* @since 2006-2-2 E;x~[MA
* @version 1.0 K,GX5c5
*/ ;%aWA
public class SortUtil { ol8uV{:"
public final static int INSERT = 1; jLf87
public final static int BUBBLE = 2; 15~+Ga4
public final static int SELECTION = 3; r;aP`MVO<
public final static int SHELL = 4; &@xeWB
public final static int QUICK = 5; vui{["
public final static int IMPROVED_QUICK = 6; wZUR
public final static int MERGE = 7; 3H47 vm(`
public final static int IMPROVED_MERGE = 8; [ w1"
public final static int HEAP = 9; \8X8NCM
(vf5qF^
public static void sort(int[] data) { gbRdng7(}
sort(data, IMPROVED_QUICK); /-)|dP
} -`ykVHgg
private static String[] name={ U^X8{,8O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -?<L"u
}; 5Bc)QKh`l|
? &;d)TQ
private static Sort[] impl=new Sort[]{ #3u471bp
new InsertSort(), -x1O|q69
new BubbleSort(), C!" .[3
new SelectionSort(), 6ypqnOTr
new ShellSort(), V_7xXuM/
new QuickSort(), :`P;(h
new ImprovedQuickSort(), tlFc+3
new MergeSort(), IsCJdgG
new ImprovedMergeSort(), EMejvPnZO
new HeapSort() &gR)bNIC_=
}; H}c, P('
}"?KHy
public static String toString(int algorithm){ %z0@4Gq
return name[algorithm-1]; k||DcwO
} wen6"
=<[ZFO~v
public static void sort(int[] data, int algorithm) { .el_pg
impl[algorithm-1].sort(data); Rx=pk
} FR@ dBcJUU
dfq5P!'
public static interface Sort { YR`Mi.,Sfm
public void sort(int[] data); \ o&i63u
} 1P\_3.V{
Z;mDMvIu (
public static void swap(int[] data, int i, int j) { ZvO:!u0+"
int temp = data; d|sI>6jD
data = data[j]; fJC,ubP[5
data[j] = temp; 3,B[%!3d
} I1H:h
} <cz~q=%v2&