[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; \mb4leg5
} 2[lP,;!
int i1=l; }?m0bM
int i2=mid+1; re/-Yu$'
for(int cur=l;cur<=r;cur++){ }9OMXLbRv
if(i1==mid+1) Xu{y5N
data[cur]=temp[i2++]; X9*n[ev
else if(i2>r) lxn/97rA
data[cur]=temp[i1++]; >N^<Q4%2
else if(temp[i1] data[cur]=temp[i1++]; IOHWb&N6
else XpAJP++
data[cur]=temp[i2++]; VwR\"8r3
} $WYt`U;*lj
} ekx(i QA
[if(B\&
} `xM*cJTZ
MTYV~S4/
改进后的归并排序: ^#5'` #t
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package org.rut.util.algorithm.support; d V%o:@Z
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import org.rut.util.algorithm.SortUtil; /JNG}*
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/** J.iz%8
* @author treeroot JuJW]E Q
* @since 2006-2-2 Uw4iWcC
* @version 1.0 BA a:!p
*/ ,ei9 ?9J1
public class ImprovedMergeSort implements SortUtil.Sort { 6*,55,y
4K cEJlK5
private static final int THRESHOLD = 10; F=F84_+K
ww|fqx?
/* ^!tX+`,6^
* (non-Javadoc) T"\d,ug5[
* aT^ $'_ G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) | .+P ;g
*/ 0+mR y57
public void sort(int[] data) { EWJB/iED
int[] temp=new int[data.length]; *twGIX
mergeSort(data,temp,0,data.length-1); <MEm+8e/s6
} P$'PB*5d|
gj;gl ="3
private void mergeSort(int[] data, int[] temp, int l, int r) { f@sC~A. 9\
int i, j, k; mxqZj8VuH
int mid = (l + r) / 2; Gza= 0
if (l == r) R&1>\t
return; IB|!51H
if ((mid - l) >= THRESHOLD) kR+}7G+
mergeSort(data, temp, l, mid); !>(uhuTBF
else :V(C+bm *
insertSort(data, l, mid - l + 1); WvU[9ME^)
if ((r - mid) > THRESHOLD) X -1r$.
mergeSort(data, temp, mid + 1, r); LR&MhG7
else i,^-9
insertSort(data, mid + 1, r - mid); lLQcyi0
-3(*4)h7
for (i = l; i <= mid; i++) { PE{<'K\g
temp = data; 1 F:bExQ
} x|Uwk=;X|s
for (j = 1; j <= r - mid; j++) { )d[n-Si
temp[r - j + 1] = data[j + mid]; jP+{2)z"W
} d8Vqmrc~
int a = temp[l]; {X?Aj >l
int b = temp[r]; D <~UaHfk
for (i = l, j = r, k = l; k <= r; k++) { @zGF9O<3,@
if (a < b) { M8lw; (
data[k] = temp[i++]; n\9IRuYO
a = temp; l_k:OZ
} else { XY)X-K$
data[k] = temp[j--]; Q'U!
b = temp[j]; gZHgL7@
} $\/i t
} +PPQ"#1pS
} }^I36$\
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/** 548L^"D
* @param data /%&5Iq\:vA
* @param l 6[t(FcS
* @param i 7 @\i5
*/ p` ~=v4;b
private void insertSort(int[] data, int start, int len) { *X3wf`C?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7OLHYt9
} AclK9+V
} e R[B0;c
} lOA EM
} Y4YZM
$,Q]GIC
堆排序： )fo0YpE^|
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package org.rut.util.algorithm.support; E$_zBD%
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import org.rut.util.algorithm.SortUtil; #^9bBF/
o5/BE`VD5c
/** %,$xmoj9O]
* @author treeroot Sv=e|!3f[k
* @since 2006-2-2 #n&/v'!\
* @version 1.0 y?cN
*/ 0.m-}
public class HeapSort implements SortUtil.Sort{ f0@*>
#6~KO7}
/* (non-Javadoc) 7.2G}O6$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RKzO$T
*/ ZxOo&YR3
public void sort(int[] data) { {zd[8TJ~xa
MaxHeap h=new MaxHeap(); +DQUL|\
h.init(data); 8@ f!,!Wn
for(int i=0;i h.remove(); \v+>qY<q
System.arraycopy(h.queue,1,data,0,data.length); :}36;n<['
} {1=|H$wKg
%4` U' j
private static class MaxHeap{ AP z"k?D0
tvno3"
void init(int[] data){ 3AENY@*
this.queue=new int[data.length+1]; )cL(()N
for(int i=0;i queue[++size]=data; C@;e<
fixUp(size); He8]Eb
} d<Lc&wlP
} f5M;q;
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private int size=0; +<$nZ=,hsy
S/*\j7cj
private int[] queue; @gqZiFM)
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public int get() { An}RD73!w
return queue[1]; h+Lpj^<2a
} {tOf0W|
34CcZEQQ
public void remove() { 4n.JRR&;
SortUtil.swap(queue,1,size--); Kt qOA[6
fixDown(1); ;t9!<L
} UM0Ws|qx&
file://fixdown D9;pjY
private void fixDown(int k) { vC1fKo\p
int j; L9^M?.a
while ((j = k << 1) <= size) { &2%|?f|
if (j < size %26amp;%26amp; queue[j] j++; izcjI.3e,
if (queue[k]>queue[j]) file://不用交换 [QMN0#(h
break; @x*xgf
SortUtil.swap(queue,j,k); {m3#1iV9
k = j; Y6Y"fb%K
} C(h<s e?
} i@D4bd9lR
private void fixUp(int k) { m<#^c?u
while (k > 1) { atd;)o0*0
int j = k >> 1; ,j{tGj_
if (queue[j]>queue[k]) EF$ASNh"
break; UsA fZg8
SortUtil.swap(queue,j,k); E,ilJl\
k = j; 5|jY
} t%e<]2-8
} ]Hl{(v\HO
:B=Gb8?
} K@:omT
.*`]x
} @J>JZ7m]\
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SortUtil： H}_R`S
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package org.rut.util.algorithm; teb(gUy}L6
9%SC#V'
import org.rut.util.algorithm.support.BubbleSort; 569p/?
import org.rut.util.algorithm.support.HeapSort; ~}{_/8'5
import org.rut.util.algorithm.support.ImprovedMergeSort; PP\ bDEPy
import org.rut.util.algorithm.support.ImprovedQuickSort; -Op^3WWyY
import org.rut.util.algorithm.support.InsertSort; jPo,mz&^
import org.rut.util.algorithm.support.MergeSort; zp:QcL"
import org.rut.util.algorithm.support.QuickSort; tBJ4lb
import org.rut.util.algorithm.support.SelectionSort; s8's(*]
import org.rut.util.algorithm.support.ShellSort; )2l @%?9
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/** {7DXSe4
* @author treeroot a-S tOO5s
* @since 2006-2-2 IIT[^_g
* @version 1.0 R|$b\3
*/ iOZ#}"
public class SortUtil { i?b9zn
public final static int INSERT = 1; iF +@aA
public final static int BUBBLE = 2; }=\?]9`
public final static int SELECTION = 3; CV=qcD
public final static int SHELL = 4; f|_\GVW
public final static int QUICK = 5; <@GO]vY
public final static int IMPROVED_QUICK = 6; WcT= 5G
public final static int MERGE = 7; u23_*W\
public final static int IMPROVED_MERGE = 8; x'\C'zeF
public final static int HEAP = 9; g yV>k=B
'wYIJK~1
public static void sort(int[] data) { CLmo%"\s
sort(data, IMPROVED_QUICK); SWhzcqp
} ;ow)N <Z
private static String[] name={ uD?G\"L i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `9^+KK"
}; <[ 2?~s
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private static Sort[] impl=new Sort[]{ e-v|
new InsertSort(), 'ZI8nMY
new BubbleSort(), _x""-X~OL
new SelectionSort(), sG_/E-%5'
new ShellSort(), EN[T3 Y
new QuickSort(), } LC
new ImprovedQuickSort(), M^o_='\bE
new MergeSort(), _=GjJ~2n
new ImprovedMergeSort(), p0Jr{hM
new HeapSort() %F;BL8d
}; ^+_rv
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public static String toString(int algorithm){ q!$s<n
return name[algorithm-1]; rAH!%~
} bhqSqU}6~
h_%q`y,
public static void sort(int[] data, int algorithm) { .^Sglo
impl[algorithm-1].sort(data); 'ToE Y3
} D.K""*ula
7~Y\qJ4b
public static interface Sort { !T{+s T
public void sort(int[] data); )+G"57p
} YB38K(
Q^(CqQo!<
public static void swap(int[] data, int i, int j) { kxMvOB$
int temp = data; paqGW]
data = data[j]; *N">93:
data[j] = temp; n i#jAwkN5
} 6"Uu;Q
} uJw?5kEbv<