[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; Q&&=:97d
} :E|+[}|
int i1=l; !}eq~3
int i2=mid+1; mCI5^%*0jQ
for(int cur=l;cur<=r;cur++){ )>rYp )
if(i1==mid+1) DM,;W`|6%
data[cur]=temp[i2++]; B(wi+;
else if(i2>r) =xH>,-8}
data[cur]=temp[i1++]; |f}`uF
else if(temp[i1] data[cur]=temp[i1++]; *MWI`=c
else : T4ap_Ycq
data[cur]=temp[i2++]; )Ps<u-V
} $reQdN=~
} 0KZsWlD:L
c)QOgXv
} Z 2uU'T
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改进后的归并排序: LKud'
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package org.rut.util.algorithm.support; &4p~i Z
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import org.rut.util.algorithm.SortUtil; O4W2X@
Pi[(xD8
/** X*r?@uK5
* @author treeroot =*WfS^O
* @since 2006-2-2 U`4t4CHA
* @version 1.0 :y!{=[>M(
*/ OH5#.${O
public class ImprovedMergeSort implements SortUtil.Sort { i?F~]8
#/K71Y
private static final int THRESHOLD = 10; {*Qx^e`h$.
oFu( J
/* PiX(Ase
* (non-Javadoc) {f>e~o
* I"jub kI=Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ( 2KopL
*/ )]JQlm:H
public void sort(int[] data) { p#dYNed]'
int[] temp=new int[data.length]; }Do$oyAV$G
mergeSort(data,temp,0,data.length-1); M`G#cEc
} lHgmljn5u
#|}EPD9$
private void mergeSort(int[] data, int[] temp, int l, int r) { Nu%MXu+
int i, j, k; ?CuwA-j
int mid = (l + r) / 2; 0 !F!Y_
if (l == r) Z1+1>|-iW
return; !2g*=oY
if ((mid - l) >= THRESHOLD) TP)}1@
mergeSort(data, temp, l, mid); `c_Wk]i
else @yn1#E,
insertSort(data, l, mid - l + 1); , *Z!Bd8
if ((r - mid) > THRESHOLD) 6.QzT(
mergeSort(data, temp, mid + 1, r); =&?BPhJE
else V)Y#m/$`
insertSort(data, mid + 1, r - mid); -IG@v0_w
O>2i)M-h9x
for (i = l; i <= mid; i++) { e:WKb9nT
temp = data; >o!~T}J7
} ,tHV H7[
for (j = 1; j <= r - mid; j++) { ~fF;GtP
temp[r - j + 1] = data[j + mid]; |VML.u:N
} Wc{/K6]f
int a = temp[l]; m2PI^?|e
int b = temp[r]; (wZ/I(4
for (i = l, j = r, k = l; k <= r; k++) { >iI-Cs7TD
if (a < b) { &\M<>>IB
data[k] = temp[i++]; :pgpE0
a = temp; `KmM*_a
} else { &^^V*O
data[k] = temp[j--]; HO9w"){d$
b = temp[j]; xU;;@9X
} 45tQ$jr`1
} /X97dF)zt
} GC^>oF
4Yya+[RY
/** xr1,D5
* @param data Ex}hk!
* @param l jZ>x5 W
* @param i NN@'79x
*/ YS+|n%?
private void insertSort(int[] data, int start, int len) { jq12,R2+)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oD&axNk
} ]?a i
} ) i=.x+Q
} ]}0QrD
} .V`N^H:l
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堆排序： QNm8`1
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package org.rut.util.algorithm.support; wOs t).
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import org.rut.util.algorithm.SortUtil; eNX!EN(^
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/** )@[##F2
* @author treeroot {>n\B~*,"C
* @since 2006-2-2 zX}t1:nc
* @version 1.0 VQwF9Iq]`
*/ k}FmdaPI'
public class HeapSort implements SortUtil.Sort{ mL]a_S{H
u+5MrS[
/* (non-Javadoc) +Un(VTD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kBg8:bo~
*/ /l1OC(hm
public void sort(int[] data) { :.aMhyh#*
MaxHeap h=new MaxHeap(); Tqj:C8K{
h.init(data); a(oa?OdJ
for(int i=0;i h.remove(); Z]qbLxJV
System.arraycopy(h.queue,1,data,0,data.length); T1#r>3c\
} |Q?^Ba
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private static class MaxHeap{ t4v@d
" `FcW
void init(int[] data){ W!t=9i
this.queue=new int[data.length+1]; <sli!rv
for(int i=0;i queue[++size]=data; \45F;f_r6
fixUp(size); (5a:O (\r
} b|oT!s
} ?/|KM8
mLm?yb:
private int size=0; "Tz'j}< 9C
g+A>Bl3#
private int[] queue; qsWy <yL+
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public int get() { ZXl_cq2r
return queue[1]; c*.-mS~Z`
} Z@,[a
L@s_)?x0
public void remove() { ( 4(,"
SortUtil.swap(queue,1,size--); 7>lM^ :A
fixDown(1); V:h7}T95
} S#:l17e3
file://fixdown F.),|t$\
private void fixDown(int k) { -nXlW
int j; Xz`0nU
while ((j = k << 1) <= size) { 7@ \:l~{
if (j < size %26amp;%26amp; queue[j] j++; stQ_Ke
if (queue[k]>queue[j]) file://不用交换 C),i#v
break; -}_1f[b
SortUtil.swap(queue,j,k); h:RP/0E
k = j; ly:2XvV3~
} ]f_`w81[
} >L')0<!&
private void fixUp(int k) { J6Vx7
while (k > 1) { ?N^1v&Q
int j = k >> 1; $*|M+ofQ
if (queue[j]>queue[k]) Y (pUd3y
break; Zm0'p!
SortUtil.swap(queue,j,k); 'o~gT ;T#
k = j; _b$ yohQ
} ?lML+
} k.z(.uc=
>,[@SF%
} !Au#j^5K-o
pH3<QNq5
} >n^780S|
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SortUtil： T<-_#}.Hn
$,yAOaa
package org.rut.util.algorithm; P?S]Q19Q4
)2_[Ww|.
import org.rut.util.algorithm.support.BubbleSort; h aApw(.%
import org.rut.util.algorithm.support.HeapSort; yzv"sd[8N
import org.rut.util.algorithm.support.ImprovedMergeSort; hJsP;y:@Lm
import org.rut.util.algorithm.support.ImprovedQuickSort; ,J8n}7aI
import org.rut.util.algorithm.support.InsertSort; H8B$#.
import org.rut.util.algorithm.support.MergeSort; GC:q6}
import org.rut.util.algorithm.support.QuickSort; K8R>O *~
import org.rut.util.algorithm.support.SelectionSort; _OC@J*4.
import org.rut.util.algorithm.support.ShellSort; M~N/er
`CI_zc=jx
/** !|up"T I
* @author treeroot BM`6<Z"3q
* @since 2006-2-2 yOt#6Vw
* @version 1.0 ^sB0$|DU
*/ 9! /kyyU
public class SortUtil { 2 rr=FJ
public final static int INSERT = 1; f:-l}Zj
public final static int BUBBLE = 2; eIfQ TV
public final static int SELECTION = 3; 4eY?#8
public final static int SHELL = 4; NB4O,w
public final static int QUICK = 5; tM^4K r~o,
public final static int IMPROVED_QUICK = 6; }Uwji
public final static int MERGE = 7; c(e>Rmh
public final static int IMPROVED_MERGE = 8; #K6cBfqI
public final static int HEAP = 9; (v%24bv
-X71JU
public static void sort(int[] data) { s<)lC;#e
sort(data, IMPROVED_QUICK); 0'fswa)
} 0=#>w_B
private static String[] name={ RGE(#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c%J6!\
}; o]Rlivahm
4G?^#+|^
private static Sort[] impl=new Sort[]{ :#pdyJQ_
new InsertSort(), m$kQbPlatN
new BubbleSort(), yB2h/~+
new SelectionSort(), =y4dR#R(\
new ShellSort(), hU8Y&R)=9
new QuickSort(), -g]Rs!w'
new ImprovedQuickSort(), J+J,W5t^
new MergeSort(), J6AHc"k.
new ImprovedMergeSort(), ]MV8rC[\
new HeapSort() w{6C4~0
}; /N"3kK,N
~vFa\7sf
public static String toString(int algorithm){ u]};QR
return name[algorithm-1]; 1!~cPD'F
} +HK4sA2;
Q#bW"},^k
public static void sort(int[] data, int algorithm) { ,T/Gv;wa2
impl[algorithm-1].sort(data); 8:ubtB
} /x<g$!`X
U&!TA(Yr
public static interface Sort { o<`vh*U@,4
public void sort(int[] data); `KJ(.m
} ,6)N.
q!Du J
public static void swap(int[] data, int i, int j) { )H8_.]|
int temp = data; ZlT }cA/n
data = data[j]; !FEc:qH
data[j] = temp; X\}l" ]
} iSW2I~PD
} ewDYu=`*