[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; f:8!@,I
} -qSGa;PJ
int i1=l; @[D5{v)S
int i2=mid+1; +sx(q@
for(int cur=l;cur<=r;cur++){ &(<Gr0
if(i1==mid+1) }Q[U4G
data[cur]=temp[i2++]; `$"{-
else if(i2>r) 9F3aT'3#!
data[cur]=temp[i1++]; =8vwaJ
else if(temp[i1] data[cur]=temp[i1++]; O4nA?bA
else r6D3u(kMb
data[cur]=temp[i2++]; |xb;#ruR6
} h9d*N9!;M
} Urw =a$
#+i5'p(4
} MNh:NFCRA
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改进后的归并排序: 5bZ0}^FYF
JiqhCt\
package org.rut.util.algorithm.support; rxxVLW
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import org.rut.util.algorithm.SortUtil; oVl:g:K40
C^?/9\
/** jz3f{~
* @author treeroot 3 JlM{N6+
* @since 2006-2-2 pl}W|kW}
* @version 1.0 Cf 202pF3y
*/ 0}Kyj"-3
public class ImprovedMergeSort implements SortUtil.Sort { Nt tu)wr
af[dkuv
private static final int THRESHOLD = 10; mJ8EiRSE
HII@Ed f?
/* uEsF 8
* (non-Javadoc) 6Po{tKU
* asW W@E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {#t7lV'4
*/ E?&YcVA
public void sort(int[] data) { R<3 -!p1v
int[] temp=new int[data.length]; iQ;lvOja
mergeSort(data,temp,0,data.length-1); s_Z5M2o
} 1q ZnyJ
OHY|< &*
private void mergeSort(int[] data, int[] temp, int l, int r) { \"I418T K
int i, j, k; 9qq6P!
int mid = (l + r) / 2; 0W 1bZPM
if (l == r) ,-n_(U
return; =q[+e(,3
if ((mid - l) >= THRESHOLD) uC]c`Ue
mergeSort(data, temp, l, mid); eiA$) rzy
else ?`:+SncI"b
insertSort(data, l, mid - l + 1); TPj,4&|
if ((r - mid) > THRESHOLD) 8XCT[X
mergeSort(data, temp, mid + 1, r); ZP:+'\&J
else uxX 3wY;M
insertSort(data, mid + 1, r - mid); \R 3O39[
>kuu\
for (i = l; i <= mid; i++) { Vo%ikR #
temp = data; juWbd|ad"
} ?>R(;B|ER
for (j = 1; j <= r - mid; j++) { <\d`}A:&
temp[r - j + 1] = data[j + mid]; Rto/-I0l
} xgsEe3|
int a = temp[l]; /+<G@+(
int b = temp[r]; 6 G,cc
for (i = l, j = r, k = l; k <= r; k++) { V\c`O
if (a < b) { 1yS:`
data[k] = temp[i++]; '^Q$:P{G?
a = temp; *\0h^^|@
} else { do.XMdit
data[k] = temp[j--]; |*~SR.[`
b = temp[j]; (76tYt~I=
} nGDY::nUE
} &`g^b^i
} H-% B<7
=Q# (2
/** %4wHiCOg
* @param data Nah\4-75&
* @param l 8yswi[
* @param i hBDmC_\~
*/ Fbw.Y6
private void insertSort(int[] data, int start, int len) { 7?y([i\y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fndH]Yp
} gd0a,_`M
} \Jwc[R&x
} 02[*b
} TD/ 4lL~(x
[.;I}
堆排序： ayg^js2,
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package org.rut.util.algorithm.support; 8y4t9V
b6""q9S!
import org.rut.util.algorithm.SortUtil; a 4?c~bs
UD&pL'{s
/** ]~pM;6Pu0
* @author treeroot 5IRUG)Icr
* @since 2006-2-2 DnCIfda2g
* @version 1.0 w,1*dn
*/ XCGK&OGI
public class HeapSort implements SortUtil.Sort{ 0Fs2* FS
"JgwL_2
/* (non-Javadoc) r+a0.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @><8YN^)%
*/ 7Xh ;dJAF3
public void sort(int[] data) { +~xzgaL
MaxHeap h=new MaxHeap(); +WCV"m
h.init(data); L7yEgYB
for(int i=0;i h.remove(); F~GIfJU
System.arraycopy(h.queue,1,data,0,data.length); OFZo"XtF
} *b`1+~p_2
&<(&u`S
private static class MaxHeap{ 'qoaMJxN`
<I{Yyl^
void init(int[] data){ Rf!$n7& \
this.queue=new int[data.length+1]; mW3IR3b
for(int i=0;i queue[++size]=data; =)!~t/
fixUp(size); Wm!cjGK
} \5#eBJ
} IRsyy\[kp8
5_rx$avm
private int size=0; /vLW{%
b~!Q3o'W
private int[] queue; @n$/2y_.
2t3)$\ylQp
public int get() { {T5u"U4
return queue[1]; }(#;{_
} /9ZU_y4&3f
5"L.C32
public void remove() { s[t?At->
SortUtil.swap(queue,1,size--); rL/H{.@$`
fixDown(1); Dd:48sN:Jq
} b}ODc]3
file://fixdown (I#3![q
private void fixDown(int k) { I7;|`jN5K
int j; %d0BQ|
while ((j = k << 1) <= size) { }n k[WW
if (j < size %26amp;%26amp; queue[j] j++; !dwa. lZ&X
if (queue[k]>queue[j]) file://不用交换 WFfn:WSWU
break; :!wt/Y
SortUtil.swap(queue,j,k); l(Uwci
k = j; rrs0|=
} pvdCiYo1r
} 50Ov>(f@7
private void fixUp(int k) { /!pJ"@
while (k > 1) { \[]4rXZN0
int j = k >> 1; N}'2GBqfU4
if (queue[j]>queue[k]) j HEt
break; m :2A[H+
SortUtil.swap(queue,j,k); p|w0 i[hc
k = j; D1wONss
} 0>ce~KU
} -=2V4WU~
-T>i5'2)
} +DYsBCVbag
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} T@ zV
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SortUtil： ;IR.6k$;
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package org.rut.util.algorithm; rb]?"lizi
(J.k\d
import org.rut.util.algorithm.support.BubbleSort; x-~=@oiv
import org.rut.util.algorithm.support.HeapSort; Am"&ApK
import org.rut.util.algorithm.support.ImprovedMergeSort; 5wC,:c[H7
import org.rut.util.algorithm.support.ImprovedQuickSort; }`+9ie7]/
import org.rut.util.algorithm.support.InsertSort; Cq}E5M
import org.rut.util.algorithm.support.MergeSort; yXCHBz6&
import org.rut.util.algorithm.support.QuickSort; yg82a7D
import org.rut.util.algorithm.support.SelectionSort; 4i+H(d n
import org.rut.util.algorithm.support.ShellSort; jaQH1^~l/-
ZQ_AqzT3D
/** mpd?F'V
* @author treeroot /1b7f'
* @since 2006-2-2 /sdZf|Zl
* @version 1.0 sE[ Yg8yAt
*/ KESM5p"f
public class SortUtil { bv}e[yH
public final static int INSERT = 1; E^m;Ab=
public final static int BUBBLE = 2; M]SeNYDy
public final static int SELECTION = 3; eaDG7+iS
public final static int SHELL = 4; D=}\]Krmay
public final static int QUICK = 5; #j)"#1IE2W
public final static int IMPROVED_QUICK = 6; BCh|^Pk
public final static int MERGE = 7; |u+!CR
public final static int IMPROVED_MERGE = 8; HbJ^L:/
public final static int HEAP = 9; 9u%(9Ae
Dv~jVIXu
public static void sort(int[] data) { @DSKa`
sort(data, IMPROVED_QUICK); <4582x,G
} m%s:4Z%=
private static String[] name={ ~re~Ys
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f'TEua_`
}; v4F+^0?
&"^U=f@v
private static Sort[] impl=new Sort[]{ `7R-2 w<b?
new InsertSort(), b8glZb*$
new BubbleSort(), gKtgW&PYm
new SelectionSort(), =X7_!vSv
new ShellSort(), U+&Eps&NI
new QuickSort(), xL"O~jTS
new ImprovedQuickSort(), t$rla_rbY
new MergeSort(), "6Z(0 iu:{
new ImprovedMergeSort(), \t)`Cp6,[b
new HeapSort() ]AX3ov6z9;
}; \J(kM,ZJ
9T0g%&
public static String toString(int algorithm){ `yO'-(@"gY
return name[algorithm-1]; BO.Db``
} &_74h);2I:
~yJJ00%
public static void sort(int[] data, int algorithm) { w@LLxL>Y
impl[algorithm-1].sort(data); Gr#WD=I-}
} e9>~mtx
`UTUrM
public static interface Sort { <(i5hmuVd
public void sort(int[] data); %^[D+1ULb
} /O~Np|~v
B:Hr{%O
public static void swap(int[] data, int i, int j) { c:""&>Z
int temp = data; < pZwM
data = data[j]; L+}<gQJ(
data[j] = temp; LL==2KNUo
} w/*m_O\!
} fElFyOo+