[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; A3;}C+K
} !_ng_,J
int i1=l; YNRorE
int i2=mid+1; <8'-azpJ6<
for(int cur=l;cur<=r;cur++){ t+2!"Jr
if(i1==mid+1) Vk#wJ-
data[cur]=temp[i2++]; byyzXRO;
else if(i2>r) 2G(RQ\Ro*
data[cur]=temp[i1++]; $_u9Y!
else if(temp[i1] data[cur]=temp[i1++]; 7*a']W{aJ
else 9"#,X36
data[cur]=temp[i2++]; +O2z&a;q
} figCeJ!W4
} I Ceb2R
b/yXE)3 X
} (B0tgg^jj,
AJ:(NV1=
改进后的归并排序: 1pM"j!
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package org.rut.util.algorithm.support; NJe^5>4`
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import org.rut.util.algorithm.SortUtil; h VQj$TA
\?|FB~.Ry
/** sXpA^pT"T
* @author treeroot 65~X!90k
* @since 2006-2-2 $v6`5;#u
* @version 1.0 X=W.{?
*/ #cZ<[K q6
public class ImprovedMergeSort implements SortUtil.Sort { [5iBXOmpS=
;mi+[`E
private static final int THRESHOLD = 10; 2brxV'tk
|#)S`Ua1
/* 1U/ dc.x5
* (non-Javadoc) %]iDhXLr
* g aq"+@fH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c(R=f+
*/ k4AF .U`I
public void sort(int[] data) { (PM!{u=
int[] temp=new int[data.length]; MoFAQe
mergeSort(data,temp,0,data.length-1); -/7[\S
} XITh_S4fs=
'on8r*
private void mergeSort(int[] data, int[] temp, int l, int r) { "SV#e4C.
int i, j, k; zFq8xw
int mid = (l + r) / 2; Hl3%+f
if (l == r) =MsQ=:ZV
return; pSzO)j
if ((mid - l) >= THRESHOLD) z|^+uL
mergeSort(data, temp, l, mid); E76#xsyhF
else Cd"cU~HAB
insertSort(data, l, mid - l + 1); 6^'BhHP
if ((r - mid) > THRESHOLD) &azy1.i~
mergeSort(data, temp, mid + 1, r); _@gd9Fi7J
else B F,8[|%#
insertSort(data, mid + 1, r - mid); BSMM3jXb
uxjx~+qFd
for (i = l; i <= mid; i++) { @C?.)#
temp = data; A\1X-Mm
} Z#1'STg
for (j = 1; j <= r - mid; j++) { iz0GL&<
temp[r - j + 1] = data[j + mid]; S=N3qBH6
} ?|`Ba-
int a = temp[l]; n'42CE
int b = temp[r]; J'=iEI
for (i = l, j = r, k = l; k <= r; k++) { hA6D*8oXD
if (a < b) { $r'PYGn
data[k] = temp[i++]; <uYeev%
a = temp; kw gsf5[
} else { 0?{Y6:d+
data[k] = temp[j--]; C=sEgtEI
b = temp[j]; k,kr7'Q
} EJz?GM
} T|L_+(M{
} -fA1_ ?7S
DMcH, _(
/** k-zkb2
* @param data q9^6A90
* @param l C;EC4n+s
* @param i $ncJc
*/ ptlcG9d-
private void insertSort(int[] data, int start, int len) { \D<w:\P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a St
} :|V`QM
} T[<deQ
} PE\.JU
} ,ezC}V0M
RM(MCle}
堆排序： jmH=W)
U=G}@Y
package org.rut.util.algorithm.support; ?C6DK{S(
^Fe%1Lnt
import org.rut.util.algorithm.SortUtil; vRR(b!Lq
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/** )^)j=xs
* @author treeroot 6 #vc"5@M
* @since 2006-2-2 !go$J]T
* @version 1.0 + bU*"5"
*/ {+SshT>J
public class HeapSort implements SortUtil.Sort{ b;K];o-/f
keMfK]9
/* (non-Javadoc) yt@;yd:OEk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L#}HeOEi[
*/ \@KKX
public void sort(int[] data) { Jj:Bi&C
MaxHeap h=new MaxHeap(); JR_s-&GaM
h.init(data); \{RMj"w:
for(int i=0;i h.remove(); >cV^f6fH
System.arraycopy(h.queue,1,data,0,data.length); ] C&AU[U*
} !VXs yH3r5
}nO[;2Na
private static class MaxHeap{ M#?^uu'
p3L0'rY|+
void init(int[] data){ J,&B
this.queue=new int[data.length+1]; ^G*zFqa+`
for(int i=0;i queue[++size]=data; 9td[^EB#(h
fixUp(size); \GFFPCi4D
} j/Dc';,d.(
} 5J1q]^
M;$LB@h
private int size=0; TA"4yri=7x
kR1dk4I4
private int[] queue; XoZw8cY
,o{|W9
public int get() { 1yg5d9
return queue[1]; l[cBDNlrC;
} N;6@f*3_i
/ad]pdF
public void remove() { hHoc>S6^M
SortUtil.swap(queue,1,size--); +,H6)'#Z
fixDown(1); OfAh?^R
} wBbJ \
file://fixdown rF*L@HI
private void fixDown(int k) { D|lm,
int j; |rhCQ"H
while ((j = k << 1) <= size) { )=:gO`"D
if (j < size %26amp;%26amp; queue[j] j++; 8!!iwmH{
if (queue[k]>queue[j]) file://不用交换 M.(shIu!+
break; ]\8{z"
SortUtil.swap(queue,j,k); j&qJK,~
k = j; `Qg#`
} r{Stsha(
} `n{yls7.
private void fixUp(int k) { G=Qslrtg
while (k > 1) { i]L4kh5
int j = k >> 1; G9_M~N%a
if (queue[j]>queue[k]) &E{i#r)'T
break; TX%W-J_
SortUtil.swap(queue,j,k); >@T(^=Q
k = j; uQYBq)p|
} [|NgrU_.
} HfN:oww
"\:ZH[j
} Y unY'xY
?#cX_
} rP=!!fC1;
#SR"Q`P
SortUtil： '~Z#h P
$:aKb#l)
package org.rut.util.algorithm; dl%KD8
R[/]iK+!&
import org.rut.util.algorithm.support.BubbleSort; <r1N6(n
import org.rut.util.algorithm.support.HeapSort; Z\)emps
import org.rut.util.algorithm.support.ImprovedMergeSort; !:7aXT*D$
import org.rut.util.algorithm.support.ImprovedQuickSort; EA/+~ux
import org.rut.util.algorithm.support.InsertSort; 'h:[[D%H`
import org.rut.util.algorithm.support.MergeSort; 4 <&8`Q
import org.rut.util.algorithm.support.QuickSort; 6$l6>A
import org.rut.util.algorithm.support.SelectionSort; 2Q/#.lNL
import org.rut.util.algorithm.support.ShellSort; qDPpGI-Y2e
Ijs"KAW ?
/** G3.MS7J
* @author treeroot +TR#
* @since 2006-2-2 yQ3*~d~U|L
* @version 1.0 pR VL}^Rk
*/ >UQ`@GdafR
public class SortUtil { KioD/
public final static int INSERT = 1; ZYBK'&J4m
public final static int BUBBLE = 2; ?pLKUAh
public final static int SELECTION = 3; P!Mz5QZ+
public final static int SHELL = 4; A)X 'We
public final static int QUICK = 5; "E><:_,\
public final static int IMPROVED_QUICK = 6; t\p_QWnF
public final static int MERGE = 7; ua'dm6",:
public final static int IMPROVED_MERGE = 8; ?_NhR
public final static int HEAP = 9; 6J\Yi)v<
>;ucwLi
public static void sort(int[] data) { TN=MZ{L
sort(data, IMPROVED_QUICK); sT^^#$ub
} OSvv\3=
private static String[] name={ wJ|wAS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B_B~Y8=3`
}; xP1`FSO8=
#&hu-gMV
private static Sort[] impl=new Sort[]{ ;zbF~5e
new InsertSort(), in^Rf` "
new BubbleSort(), gXR1nnK
new SelectionSort(), -ty_<m]
new ShellSort(), cE*Gd^
new QuickSort(), 54A ndyeA
new ImprovedQuickSort(), "I|[m%\
new MergeSort(), I&}Md73
new ImprovedMergeSort(), !u}}V
new HeapSort() 4~G++|NQ
}; X5@rPGc
CpAdE m{
public static String toString(int algorithm){ U73{Uv
return name[algorithm-1]; {FavF 9O
} Tk'YpL#U
"ct_EPr`
public static void sort(int[] data, int algorithm) { ?\7" A
impl[algorithm-1].sort(data); Jk.Ec)w
} Cu%|}xq
[y>;[K
public static interface Sort { tcg sXB/t
public void sort(int[] data); }b#KV?xgW
} 4YVxRZ1[3
XG5mfKMt+
public static void swap(int[] data, int i, int j) { XZaei\rUn)
int temp = data; C?FUc cI
data = data[j]; #eqy!QdePf
data[j] = temp; k^pf)*p
} J% B(4`
} 7[l "=