[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; ZaY|v-
} =kwz3Wv
int i1=l; l(Hz9
int i2=mid+1; :qj^RcmVPL
for(int cur=l;cur<=r;cur++){ ydOG8EI
if(i1==mid+1) ESoC7d&.K{
data[cur]=temp[i2++]; 'Y ,2CN
else if(i2>r) x5PM]~"p
data[cur]=temp[i1++]; ,Il) tH
else if(temp[i1] data[cur]=temp[i1++]; @UdF6:T
else 3D@3jyo:
data[cur]=temp[i2++]; d]|K%<+(
} _>`9]6\&
} /]J\/Z>
9@"pR;X@
} ;Q vQ fV4
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改进后的归并排序: SOsz=bVx
,!^c`_Q\>@
package org.rut.util.algorithm.support; I*>q7Hsu
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import org.rut.util.algorithm.SortUtil; l}(HE+?
_\k?uUo&,^
/** ;! ?l8R
* @author treeroot 1@LUxU#Uu$
* @since 2006-2-2 J"E _i]
* @version 1.0 ^.@%n1I"5y
*/ ~e,l2 <
public class ImprovedMergeSort implements SortUtil.Sort { ~cO iv
b1'849i'y=
private static final int THRESHOLD = 10; `IBNBJy
5cA:;{z];g
/* `q^qe>'
* (non-Javadoc) k_u!E3{~
* k&5T-\q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )n9,?F#l
*/ KfVsnL_
public void sort(int[] data) { ( 6zu*H)
int[] temp=new int[data.length]; kFkI[WKyZ
mergeSort(data,temp,0,data.length-1); havmhS)O
} G{X7;j e
<"p-0=IgJ
private void mergeSort(int[] data, int[] temp, int l, int r) { l SKq
int i, j, k; L;?h)8
int mid = (l + r) / 2; y?r`[{L(lA
if (l == r) M/[_~
return; ;m.6 ~A
if ((mid - l) >= THRESHOLD) eTgtt-;VR
mergeSort(data, temp, l, mid); 9:xs)t- _
else z8kebS&5
insertSort(data, l, mid - l + 1); V,& OO
if ((r - mid) > THRESHOLD) e#}Fm;|d
mergeSort(data, temp, mid + 1, r); -\%5aXr
else / s Apj
insertSort(data, mid + 1, r - mid); \@h$|nb
nLk`W"irM
for (i = l; i <= mid; i++) { *a|575e< z
temp = data; se>\5k
} pd,d"+
for (j = 1; j <= r - mid; j++) { /TB{|_HbW
temp[r - j + 1] = data[j + mid]; ^A\(M%*F
} ]FvGAG.*
int a = temp[l]; "B+F6
int b = temp[r]; Pz D30VA
for (i = l, j = r, k = l; k <= r; k++) { QAo/d4
if (a < b) { ]3 GO_tL
data[k] = temp[i++]; ?9eiT:2
a = temp; zNo"P[J8
} else { %{V7|Azt
data[k] = temp[j--]; #Q=c.AL{
b = temp[j]; Qof%j@
} RSB+Saf.8
} bxO/FrwTj{
} hCgk78O?
t(6i4c>
/** |${ImP
* @param data hD?6RVfG
* @param l _ 3>E+9TQ
* @param i Qqj9o2
*/ >e-0A
private void insertSort(int[] data, int start, int len) { w9"~NK8xzM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;{R;lF,
} jHHCJOHB8
} OA}; pQ9QN
} Ke:EL;*8k
} qvWi;
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堆排序： 5"1wz
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package org.rut.util.algorithm.support; Hc|cA(9sh9
)OQ<H.X
import org.rut.util.algorithm.SortUtil; ?0sTx6x@
GCr]x '
/** ld|GY>rH
* @author treeroot aYc<C$:NC"
* @since 2006-2-2 Vep41\g^
* @version 1.0 a\,V>}e
*/ NZ8X@|N
public class HeapSort implements SortUtil.Sort{ L"S2+F)n
PX23M|$!
/* (non-Javadoc) /ET+`=n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LH_U#P`E
*/ 1.8"N&s
public void sort(int[] data) { %8Y+Df;ax
MaxHeap h=new MaxHeap(); CHO_3QIz
h.init(data); -U_,RMw~
for(int i=0;i h.remove(); ~g#/q~UE
System.arraycopy(h.queue,1,data,0,data.length); suWO:]FR
} fY78
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private static class MaxHeap{ BOA7@Zaa$p
7042?\\=
void init(int[] data){ %2\Pe 2Z
this.queue=new int[data.length+1]; K/}x'*=
for(int i=0;i queue[++size]=data; {^;7DV:
fixUp(size); ?uJX
} 2Ir*}s2{
} fJk'5kv
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private int size=0; 2w+4B4
s?9Y3]&+&M
private int[] queue; #k>A,
Bzt:9hr6BO
public int get() { qJonzFp7
return queue[1]; \x4:i\Fx@
} DVg$rm`
?Oy0p8
public void remove() { W 9}xfy09
SortUtil.swap(queue,1,size--); cud9oJ-=;
fixDown(1); 7D 3-/_v
} TOa6sB!H
file://fixdown s!MD8ia
private void fixDown(int k) { kj4=Q\Rfm
int j; 5X5UUdTM
while ((j = k << 1) <= size) { @;hdZLG]`&
if (j < size %26amp;%26amp; queue[j] j++; `*kl>}$
if (queue[k]>queue[j]) file://不用交换 !SnLvW89Z
break; '<ZHzDW@
SortUtil.swap(queue,j,k); kou7_4oS
k = j; B#5[PX
} FK-q-PKO#.
} jpW_q+^?
private void fixUp(int k) { cuy9QBB :
while (k > 1) { bBo>Y7%
int j = k >> 1; W|0))5a
if (queue[j]>queue[k]) 4qsxlN>4O
break; S^EAE]
SortUtil.swap(queue,j,k); ` ` Yk
k = j; {%y|A{}c
} $[7/~I>m
} >mEfd=p
w?N>3`Jnf
} ,PJC FQMR
)4:]gx#cr
} +IjBeQ?
M ]O4
SortUtil： Q uw|KL
Vwjic2lGI
package org.rut.util.algorithm; KPjAk
/PR4ILed
import org.rut.util.algorithm.support.BubbleSort; \>n[x;$
import org.rut.util.algorithm.support.HeapSort; VTyj<6Y
import org.rut.util.algorithm.support.ImprovedMergeSort; 31e O2|7
import org.rut.util.algorithm.support.ImprovedQuickSort; ^~bdAO81
import org.rut.util.algorithm.support.InsertSort; A+4Kj~`!
import org.rut.util.algorithm.support.MergeSort; "f~OC<GdYs
import org.rut.util.algorithm.support.QuickSort; s6_i>
import org.rut.util.algorithm.support.SelectionSort; b9-3
import org.rut.util.algorithm.support.ShellSort; iAXGf V
lHTr7uF(
/** zh\"sxL
* @author treeroot 9v3n4=gc
* @since 2006-2-2 t6\--lk_
* @version 1.0 tuuwoiQ*`
*/ Gui[/iY,F
public class SortUtil { uf (_<~
public final static int INSERT = 1; hJk:&!M=T
public final static int BUBBLE = 2; %4YSuZg
public final static int SELECTION = 3; Vw`Q:qo0:b
public final static int SHELL = 4; Pv\8 \,B9
public final static int QUICK = 5; %,ScGQE
public final static int IMPROVED_QUICK = 6; Rxlv:
public final static int MERGE = 7; V U5</si+
public final static int IMPROVED_MERGE = 8; zx.SRs$
public final static int HEAP = 9; "sY}@Q7
y>gw@+
public static void sort(int[] data) { 8ZCA vEy
sort(data, IMPROVED_QUICK); =9^}>u
} QF*cdc<
private static String[] name={ e#3RT8u#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;<GxonIV
}; JV'aqnb.8\
j*4:4B%
private static Sort[] impl=new Sort[]{ 5tLb o
new InsertSort(), |Sua4~yL(
new BubbleSort(), =#<bB)59
new SelectionSort(), X{6a
new ShellSort(), BB(v,W
new QuickSort(), r=AA /n<
new ImprovedQuickSort(), hk S:_e=
new MergeSort(), UTN[!0[
new ImprovedMergeSort(), 0]=Bqyg
new HeapSort() g)|vS>^~
}; k"/Rjd(;
9e vQQN6D|
public static String toString(int algorithm){ [fo#){3K
return name[algorithm-1]; A^LS^!Jz
} 5IFzbL#q#f
+/]*ChrS
public static void sort(int[] data, int algorithm) { }#g+~9UK
impl[algorithm-1].sort(data); X-TGrdoX
} h%4UeL &F
;#0$iE
public static interface Sort { Ze#DFe$
public void sort(int[] data); 7-}5 W
} e+4Eiv
uZ>q$ F
public static void swap(int[] data, int i, int j) { *">CEQ[MT
int temp = data; 9d(#/n
data = data[j]; C+5X8
data[j] = temp; Fr; 's(^
} ZW0\_1
} vX}w_Jj>