[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; )`V__^
} Q|1X|_hs
int i1=l; E{#Y=
int i2=mid+1; J nzI- y
for(int cur=l;cur<=r;cur++){ )tB1jcI;
if(i1==mid+1) f|cF[&wo
data[cur]=temp[i2++]; #ozQF~
else if(i2>r) "?Mf%u1R
data[cur]=temp[i1++]; 6j{O/
else if(temp[i1] data[cur]=temp[i1++]; D,)^l@UP
else 8ba*:sb
data[cur]=temp[i2++]; (+=TKI<=
} SaA9)s
} LqOjVQxz
rjJ-ZRs\
} <zdo%~ba
P?Fm<s:
改进后的归并排序: s(3iGuT
gL-\@4\wc
package org.rut.util.algorithm.support; KDW=x4*p
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import org.rut.util.algorithm.SortUtil; =w/S{yC
%x5zs ]4^
/** ,VTX7vaH
* @author treeroot j}devpO
* @since 2006-2-2 VJ'bS9/T
* @version 1.0 N:yyDeGyW
*/ 9tZ+?O5
public class ImprovedMergeSort implements SortUtil.Sort { 5%Xny8 ]|D
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private static final int THRESHOLD = 10; r!,/~~mT
$>M A
/* 3~uWrZ.u
* (non-Javadoc) _hy<11S;
* rdY/QvP0=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -1P*4H2a
*/ ^1 P@BRh
public void sort(int[] data) { n!>#o1Qr
int[] temp=new int[data.length]; ?4&C)[^
mergeSort(data,temp,0,data.length-1); 1MF0HiC
} g12mSbf=9
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private void mergeSort(int[] data, int[] temp, int l, int r) { 7Hm/g
int i, j, k; _);;@T
int mid = (l + r) / 2; 4qc0QA%
if (l == r) 3"pl="[*
return; TiF2c#Q*y
if ((mid - l) >= THRESHOLD) ;&9A Yh.
mergeSort(data, temp, l, mid); *z{.9z`
else ~LKX2Q:S
insertSort(data, l, mid - l + 1); )ZP-t!).G#
if ((r - mid) > THRESHOLD) >aaHN1Ca
mergeSort(data, temp, mid + 1, r); _H(:$=$Q
else @jp}WwC/
insertSort(data, mid + 1, r - mid); eK]$8l|LI
IUJRP
for (i = l; i <= mid; i++) { fsxZQ=-PW
temp = data; bR*/d-v^
} jRv j:H9
for (j = 1; j <= r - mid; j++) { nYv`{0S+m
temp[r - j + 1] = data[j + mid]; Oy `2ccQ#
} (fYrb#]!y
int a = temp[l]; z12c9k%s
int b = temp[r]; i7RW8*
for (i = l, j = r, k = l; k <= r; k++) { R Wd#)3
if (a < b) { J|Xu]fg0
data[k] = temp[i++]; \B<A.,i4
a = temp; U'8ub(:&
} else { \1p_6U7
data[k] = temp[j--]; V L&5TZtz
b = temp[j]; }?vc1%w
} pSLv1d"9{
} wv~?<DF
} tUp'cG
xg>AW Q
/** 0qV"R7TW
* @param data NSPa3NE
* @param l I9 R\)3"
* @param i `iiZ
*/ LT5rLdn
private void insertSort(int[] data, int start, int len) { Yom,{;Bv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MDo4{7
} hSvA dT]m
} O+o4E?}
} bLHj<AX#>|
} qU1^ K
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堆排序： oo:(GfO}
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package org.rut.util.algorithm.support; ?xTh}Sky
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import org.rut.util.algorithm.SortUtil; qhPvU( ,
V@(7K0
/** .skR4f,h
* @author treeroot <KFE.\*Z4
* @since 2006-2-2 x*9CK8o=
* @version 1.0 jmAQ!y|W.
*/ SnhB$DG
public class HeapSort implements SortUtil.Sort{ ;bZIj`D(
!"dbK'jb^
/* (non-Javadoc) u I \zDR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ||lI_B
*/ .o2]ndT/J
public void sort(int[] data) { [;Q8xvVZ'
MaxHeap h=new MaxHeap(); Au6*hv3:
h.init(data); YGA("<
for(int i=0;i h.remove(); b83__i
System.arraycopy(h.queue,1,data,0,data.length); yvgn}F{}
} $hkMJ),T~
buXPeIo^VM
private static class MaxHeap{ \qrSJ=}t
jDp]}d|f)
void init(int[] data){ DiB~Ovh|
this.queue=new int[data.length+1]; pLFJ"3IJB
for(int i=0;i queue[++size]=data; [U]ouh)
fixUp(size); $Yr'`(Cbc
} yW$ja|^E
} r~sx]=/
ERW>G{+
private int size=0; PC| U]
[I;5V=bKW
private int[] queue; 5pBQ~m3
_u`NIpXSP
public int get() { n.{+\M6k
return queue[1]; |EJ&s393&
} eB:OvOol*^
R;P>_ei(LK
public void remove() { 6 1=?(Iw
SortUtil.swap(queue,1,size--); 3gW4\2|T
fixDown(1); K)Nbl^6x
} N#;k;Z'iL
file://fixdown r@&d88U:
private void fixDown(int k) { $XqfwlUu/4
int j; @)8QxI^3[
while ((j = k << 1) <= size) { LF'M!C9|
if (j < size %26amp;%26amp; queue[j] j++; yJaQcGxE"
if (queue[k]>queue[j]) file://不用交换 wl{Fx+<^3
break; U}xQUFT|
SortUtil.swap(queue,j,k); }57wE$9K
k = j; =?`5n|A*
} }}3*tn<6
} 7-M$c7S
private void fixUp(int k) { Vrf+~KO7
while (k > 1) { gY], (*v
int j = k >> 1; B)F2SK<@
if (queue[j]>queue[k]) YC:>)
break; -R,[/7zj
SortUtil.swap(queue,j,k); 2&E1)^
k = j; qy`95^
} # E'g{.N
} rsP3?.E
uf*sI
} 0gBD
rO% |PRP
} ?Uzs^rsb
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SortUtil： J9oGwP
f[n#Eu}
package org.rut.util.algorithm; ,.`";='o
WV5gH*uUa
import org.rut.util.algorithm.support.BubbleSort; ex8mA6g
import org.rut.util.algorithm.support.HeapSort; P5ii3a?R
import org.rut.util.algorithm.support.ImprovedMergeSort; X6mY#T'fQ
import org.rut.util.algorithm.support.ImprovedQuickSort; VVdgNT|}W
import org.rut.util.algorithm.support.InsertSort; G?)vqmJ%
import org.rut.util.algorithm.support.MergeSort; Eb`U^*A
import org.rut.util.algorithm.support.QuickSort; A6'G%of
import org.rut.util.algorithm.support.SelectionSort; Urhh)i
import org.rut.util.algorithm.support.ShellSort; $;%-<*Co
Ga-AhP
/** "Hmo`EB0
* @author treeroot /xjHzva^ w
* @since 2006-2-2 w$H=GF?"
* @version 1.0 --0z"`@{
*/ _9E7;ew
public class SortUtil { ;m}lmq,
public final static int INSERT = 1; da3]#%i0
public final static int BUBBLE = 2; Tx35~Z`0
public final static int SELECTION = 3; \xk`o5/{
public final static int SHELL = 4; dL<okw
public final static int QUICK = 5; >9D=PnHnD
public final static int IMPROVED_QUICK = 6; 1Y410-.3w{
public final static int MERGE = 7; S%b7NK
public final static int IMPROVED_MERGE = 8; `LL#Aia
public final static int HEAP = 9; M_V\mYC8I
M'D;2qo
public static void sort(int[] data) { c"%XE#D
sort(data, IMPROVED_QUICK); 2.Ym
} |b'fp1</
private static String[] name={ >?yaG=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q('O@-HA
}; oUEpzv,J
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private static Sort[] impl=new Sort[]{ HoGrvt<:.P
new InsertSort(), WO*YBH@
new BubbleSort(), \>w[#4`m
new SelectionSort(), 6 $%^
new ShellSort(), F#@Mf?#2
new QuickSort(), OWCd$c_(
new ImprovedQuickSort(), %FGPsHH
new MergeSort(), F ]\4<
new ImprovedMergeSort(), .eW}@1+[;
new HeapSort() ecA[
}; @*L^Jgn
G*e/Ft.wf8
public static String toString(int algorithm){ `9eE139V='
return name[algorithm-1]; \1f$]oS
} .l5y!?
%"j<`
public static void sort(int[] data, int algorithm) { lyKV^7}
impl[algorithm-1].sort(data); Mw7 ~:O`
} ,;C92XY
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public static interface Sort { E0}`+x
public void sort(int[] data); [i.2lt#]
} N\DEY]
fR!'i):u
public static void swap(int[] data, int i, int j) { R{kZKD=
int temp = data; wQ[~7 ,o
data = data[j]; `!5ZF@Q>e
data[j] = temp; Yd lXMddE
} {Q^P<
} ]*U\ gm%