[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; b6&NzUt34V
} MdZgS#`
int i1=l; UUu-(H-J
int i2=mid+1; od*Z$Hb>'
for(int cur=l;cur<=r;cur++){ d~-p;i
if(i1==mid+1) JZ/O0PW
data[cur]=temp[i2++]; m,C,<I|'d
else if(i2>r) ><Z3<7K9
data[cur]=temp[i1++]; ih |Ky+!
else if(temp[i1] data[cur]=temp[i1++]; p''"E$B/(
else ([b!$o<v
data[cur]=temp[i2++]; 2BX GVo
} ,Bw)n,
} 8`2<g0V2
heZy 66
} X|E+K
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改进后的归并排序: -{U>} Y)
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package org.rut.util.algorithm.support; exO#>th1
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import org.rut.util.algorithm.SortUtil; 4:&qTY)H
q%k(M[
/** uk[< 6oxz
* @author treeroot %M#?cmt
* @since 2006-2-2 [~c'|E8Q
* @version 1.0 hr4ye`c j
*/ b>=Wq
public class ImprovedMergeSort implements SortUtil.Sort { 5 k%9>U%$
6w"( y~c1
private static final int THRESHOLD = 10; DwmU fZp
}"?nU4q;S
/* ,ah*!Zm.kk
* (non-Javadoc) 4 %)N(%u
* pq[X)]z|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Afy .3T @)
*/ PN"8 Y
public void sort(int[] data) { @>fO;*
int[] temp=new int[data.length]; H8$<HhuZM
mergeSort(data,temp,0,data.length-1); \}Acq;
} o9Txo (tYU
n(1wdlEp
private void mergeSort(int[] data, int[] temp, int l, int r) { QGr\I/Y
int i, j, k; xd|~+4
int mid = (l + r) / 2; z_Wm HB
if (l == r) YWRE&MQ_
return; Seq]NkgY
if ((mid - l) >= THRESHOLD) nx-1*
mergeSort(data, temp, l, mid); yS)-&t!;
else j&dx[4|m:h
insertSort(data, l, mid - l + 1); M U?{?5
if ((r - mid) > THRESHOLD) PW*;Sp
mergeSort(data, temp, mid + 1, r); p,w|=@=
else tS (i711
insertSort(data, mid + 1, r - mid); }KA-t}8
XLZ j
for (i = l; i <= mid; i++) { 4`8IFK
temp = data; z1f^p7$M?
} 2y+70(E1
for (j = 1; j <= r - mid; j++) { =R&)hlm
temp[r - j + 1] = data[j + mid]; 8 "_Bq
} ?dsf@\
int a = temp[l]; ZcMj=#i
int b = temp[r]; @PQrmn6w
for (i = l, j = r, k = l; k <= r; k++) { .Vo"AuC}
if (a < b) { AanH{
data[k] = temp[i++]; gX@nPZjg
a = temp; cBifZv*l
} else { {sC@N![
data[k] = temp[j--]; 3P//H88LY
b = temp[j]; CKv&Re
} J>=1dCK
} %Kh2E2Pe
} `'p`PyMt`
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/** /Hv*K&}M
* @param data J`w]}GlH
* @param l Abj97S
* @param i $sEB'>:
*/ !0Idp%
private void insertSort(int[] data, int start, int len) { 6Z~Ya\~.g.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8f?rEI\0GD
} GAv)QZyV$
} LZ~2=Y< U(
} Ovvny$
} 8+"10q-
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堆排序： QU:EY'2
2;:lK":
package org.rut.util.algorithm.support; BwC<rOU
jCzGus!rM
import org.rut.util.algorithm.SortUtil; um;:fT+
%=V"CJ$|
/** eSl]8BX_
* @author treeroot 6sPk:5
* @since 2006-2-2 >;)2NrJV
* @version 1.0 Bc@30KiQ^
*/ B&?fM~J
public class HeapSort implements SortUtil.Sort{ =HVfJ"vK
eUt=n)*`
/* (non-Javadoc) Yx5J$!Ld
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bFg*l$`5
*/ t9.,/o,
public void sort(int[] data) { 7i8eg*Gl
MaxHeap h=new MaxHeap(); Va7c#P?
h.init(data); R:"+ #Sq
for(int i=0;i h.remove(); 3:lDL2
System.arraycopy(h.queue,1,data,0,data.length); +'|{1gB
} GM](=|F
pTWg m\h
private static class MaxHeap{ 0#QKVZq2>
/HkFlfPd
void init(int[] data){ PL@~Ys0
this.queue=new int[data.length+1]; }taLk@T
for(int i=0;i queue[++size]=data; IU|kNBo
fixUp(size); daslaa_A
} f^p^Y F+
} /v|Onq1Y4
l&L,7BX
private int size=0; O2.'-
*/w7?QOv
private int[] queue; ;3;2h+U*
i@5)`<?
public int get() { U]hF
return queue[1]; @'i+ff\
} v^SsoX>WMH
nO{ x^b <
public void remove() { *KJB>W%@uM
SortUtil.swap(queue,1,size--); o0ZBi|U\4
fixDown(1); M-J<n>hl
} nBz`q+V
file://fixdown 2.-o@im0
private void fixDown(int k) { &nY;=Hv`WY
int j; #DFp[\)1
while ((j = k << 1) <= size) { A&zS'toU
if (j < size %26amp;%26amp; queue[j] j++; $wV1*$1NM
if (queue[k]>queue[j]) file://不用交换 kz B\'m,l
break; a460|w6
SortUtil.swap(queue,j,k); *fnvZw?
k = j; hJ*Ihwn|
} 1J{fXh
} *k [J6
private void fixUp(int k) { gL3iw!7
while (k > 1) { $*f?&U]k
int j = k >> 1; %}3qR~;
if (queue[j]>queue[k]) FhkkWWL
break; NHm]`R,
SortUtil.swap(queue,j,k); Ez+Z[*C
k = j; GZ3 ]N
} v^N`IJq
} 0uvzxmN
V'DA[{\*
} 7 oQ[FdRn*
i47j lyH
} X~oK[Nf'9
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SortUtil： upy\gkpnGO
M.q=p[
package org.rut.util.algorithm; YXW%]Uy+
"=1;0uy]
import org.rut.util.algorithm.support.BubbleSort; 9'[ N1Un.=
import org.rut.util.algorithm.support.HeapSort; LWfqEL -
import org.rut.util.algorithm.support.ImprovedMergeSort; ?D`T7KSe~D
import org.rut.util.algorithm.support.ImprovedQuickSort; T-_"|-k}P%
import org.rut.util.algorithm.support.InsertSort; L|hx arJ
import org.rut.util.algorithm.support.MergeSort; _S}A=hK'
import org.rut.util.algorithm.support.QuickSort; >&:NFq-
import org.rut.util.algorithm.support.SelectionSort; k8AW6oO/i
import org.rut.util.algorithm.support.ShellSort; he(A3{'
9(4&KZpK
/** k,yZ[n|`
* @author treeroot O@V%Cu
* @since 2006-2-2 kM8{Cw
* @version 1.0 <h-vjz
*/ <{5EdX
public class SortUtil { T .FI'wy
public final static int INSERT = 1; 7*5Z
public final static int BUBBLE = 2; (QoI<j""
public final static int SELECTION = 3; _tTNG2
public final static int SHELL = 4; 4)|8Eu[p7
public final static int QUICK = 5; G+UMBn
public final static int IMPROVED_QUICK = 6; f y:,_#
public final static int MERGE = 7; },+wJ1
public final static int IMPROVED_MERGE = 8; o%9*B%HO/
public final static int HEAP = 9; l*\y
x^4xq#Bb7
public static void sort(int[] data) { }X*Riu7gk
sort(data, IMPROVED_QUICK); #S&Tkip]"W
} VXIP0p@
private static String[] name={ nD5 gP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ( +pLA"xq
}; ojyIQk+
;s`sn$@
private static Sort[] impl=new Sort[]{ s<qe,'Y
new InsertSort(), @=}YTtq
new BubbleSort(), #wL
new SelectionSort(), o(DOQGl
new ShellSort(), Zjbc3M5
new QuickSort(), sl]_M
new ImprovedQuickSort(), AC>`'Gx
new MergeSort(), ):i&`}SY
new ImprovedMergeSort(), S S2FTb-m
new HeapSort() > ;/l)qk,
}; ,lZB96r0
|<:vY
public static String toString(int algorithm){ "@??Fw!
return name[algorithm-1]; GGnpjwXeH
} ;\f gF@
ma"3qGy
public static void sort(int[] data, int algorithm) { cWoPB _
impl[algorithm-1].sort(data); zIh['^3.n
} E\Rhz]G(
F(tx)V ~T3
public static interface Sort { o4|M0
public void sort(int[] data); |&RU/a
} qWQ/'M
8C*c{(4
public static void swap(int[] data, int i, int j) { z^'gx@YD*v
int temp = data; /Mvf8v
data = data[j]; L*YynF
data[j] = temp; ;M)QwF1
} 3j\1S1
} etTn_v