[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; C.SGm
} __x2xtrH
int i1=l; q,b6).
int i2=mid+1; dWR0tS6vR`
for(int cur=l;cur<=r;cur++){ ,E&PIbDL1
if(i1==mid+1) r{DR$jD
data[cur]=temp[i2++]; p3?!}VM!y
else if(i2>r) q5X\wz2N
data[cur]=temp[i1++]; c%2C\UB
else if(temp[i1] data[cur]=temp[i1++]; \ ;.W;!*
else Af8&PhyrU
data[cur]=temp[i2++]; G$X+g{
} foh>8/AL/
} &(H;Bin'
B>kx$_~
} =,Yi" E
#qL?;Zh0S
改进后的归并排序: H|a9};pO\
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package org.rut.util.algorithm.support; 5DgfrX
|7@[+
import org.rut.util.algorithm.SortUtil; <b0;Nf
Jt4&%b-T
/** 6"+/Imb-
* @author treeroot U`gQ7
* @since 2006-2-2 ]"'$i4I{R
* @version 1.0 z+ybtS>pZ
*/ JZ#O"rF
public class ImprovedMergeSort implements SortUtil.Sort { o*5<Cxg
QR'yZ45n4
private static final int THRESHOLD = 10; !<!5;f8
PoyY}Ra
/* "PA:
* (non-Javadoc) b21c} rI3
* aAHx^X^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W,</
*/ U\N|hw#f!!
public void sort(int[] data) { ;XFo:?
int[] temp=new int[data.length]; 4k9O6
mergeSort(data,temp,0,data.length-1); f.?p"~!
} N?!]^jI,
d-%!.,F#W
private void mergeSort(int[] data, int[] temp, int l, int r) { "9=F/o9
int i, j, k; !Pnvqgp/
int mid = (l + r) / 2; $[zy|Y(
if (l == r) HWe?vz$4"
return; O*MC"%T
if ((mid - l) >= THRESHOLD) }UwDHq=
mergeSort(data, temp, l, mid); @4h{#
else _M n7zt1^
insertSort(data, l, mid - l + 1); 9}e`_z
if ((r - mid) > THRESHOLD) w7Do#Cv
mergeSort(data, temp, mid + 1, r); x1['+!01
else HX1RA5O
insertSort(data, mid + 1, r - mid); sQt]Y&_/@
b&k !DeE
for (i = l; i <= mid; i++) { &A=>x
temp = data; x5q5<-#
} L"Y_:l3"7
for (j = 1; j <= r - mid; j++) { 56i9V9{2
temp[r - j + 1] = data[j + mid]; Gc=#
} .ztO._J7f
int a = temp[l]; y8T%g(
int b = temp[r]; m`(5B
for (i = l, j = r, k = l; k <= r; k++) { 8BUPvaP<[
if (a < b) { m9My
data[k] = temp[i++]; '~?\NeO=
a = temp; |2mm@):
} else { 3OUZR5_$
data[k] = temp[j--]; xL,;(F\^
b = temp[j]; n[Jpy[4g
} <"I#lib
} N}0-L$@SL
} V:?exJg9
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/** D[) Z$+D4f
* @param data c`]_Q1'30w
* @param l {Lj]++`fB]
* @param i k@1\ULo
*/ ~m~<xtoc
private void insertSort(int[] data, int start, int len) { Wi3:;`>G<p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jOs&E^">&B
} B%95M|
} x:bJ1%
} o"F=3b~:n
} Y*-#yG9
SH#-3&$[
堆排序： 8r@_b
#Z8=z*4
package org.rut.util.algorithm.support; o#V}l^uU=
Gni<@;}
import org.rut.util.algorithm.SortUtil; ]qZs^kQ
Y#3<w
/** E0XfM B]+
* @author treeroot -eH5s3:A
* @since 2006-2-2 \W5fcxf
* @version 1.0 n_[;2XQQ
*/ 0pT?qsM2
public class HeapSort implements SortUtil.Sort{ ^J,Zl`N
Kj|l]'
/* (non-Javadoc) M*|,05>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )H&rr(
*/ d(u"^NH;
public void sort(int[] data) { k&-SB -
MaxHeap h=new MaxHeap(); ?Rlo<f:Mf
h.init(data); +{ Q]$b
for(int i=0;i h.remove(); 29R_?HBH
System.arraycopy(h.queue,1,data,0,data.length); V gLnpPOQ
} 92|\`\LP%
qV^Z@N+,
private static class MaxHeap{ E/MD]ox
d{?X:*F
void init(int[] data){ LF\4>(C2g
this.queue=new int[data.length+1]; F91'5D,u0
for(int i=0;i queue[++size]=data; jqULg iC
fixUp(size); ttlFb]zZh
} egur}
} _tJp@\rOz=
!9yOFd_
private int size=0; dQSX&.<c,
b}DxD1*nsI
private int[] queue; H+UA
CAX)AN
public int get() { 6CoDn(+z
return queue[1]; ~gz_4gzb
} @VlDi1
(~6oA f
public void remove() { !g=2U`j^
SortUtil.swap(queue,1,size--); V^9c:!aI
fixDown(1); p*F.WxB)4
} DEj6 ky
file://fixdown @LQe[`
private void fixDown(int k) { M`6rI
int j; 6_`9 4+
while ((j = k << 1) <= size) { QDO.&G2
if (j < size %26amp;%26amp; queue[j] j++; C"`,?K(U
if (queue[k]>queue[j]) file://不用交换 9?8Yf(MC%u
break; no6q3<re
SortUtil.swap(queue,j,k); x<_uwL2a
k = j; 0q6$KP}q
} a o"\L0;{
} UVND1XV^f
private void fixUp(int k) { mUFg(;ya
while (k > 1) { J9+<9g4-t
int j = k >> 1; 7f!"vhCXM;
if (queue[j]>queue[k]) [wHGt?R
break; -\ {.]KL
SortUtil.swap(queue,j,k); s];jroW@u
k = j; Tf[o'=2
} #^|"dIZ_M
} vumA W*
#9Src\V
} oHo@rGU
9|y?jb5im
} W!@*3U]2R
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SortUtil： :Kc9k(3&r
8RGU^&
package org.rut.util.algorithm; JL[xrK0
0O,Q]P 82f
import org.rut.util.algorithm.support.BubbleSort; IIrp-EMXJ
import org.rut.util.algorithm.support.HeapSort; $CT2E
import org.rut.util.algorithm.support.ImprovedMergeSort; m-%.LDqM
import org.rut.util.algorithm.support.ImprovedQuickSort; IrIF 853g
import org.rut.util.algorithm.support.InsertSort; ,OGXH2!h
import org.rut.util.algorithm.support.MergeSort; y2nwDw(xF
import org.rut.util.algorithm.support.QuickSort; Pe-1o#7~W
import org.rut.util.algorithm.support.SelectionSort; >M~wFs$~
import org.rut.util.algorithm.support.ShellSort; /)Ga<
pAZD>15l"
/** M$@Donx
* @author treeroot o*\Fj}l-
* @since 2006-2-2 =a!w)z_rw
* @version 1.0 gK8E|f-z
*/ S5a?KU
public class SortUtil { X:3W9`s)*
public final static int INSERT = 1; s2`:NS
public final static int BUBBLE = 2; 9d5|rk8VS
public final static int SELECTION = 3; y+R*<5qC<
public final static int SHELL = 4; jv<C#0E^
public final static int QUICK = 5; YfB8
public final static int IMPROVED_QUICK = 6; QC/%|M0 {
public final static int MERGE = 7; >St]MS
public final static int IMPROVED_MERGE = 8; vz{Z tE"
public final static int HEAP = 9; J 'qhY'te
)I/K-zj
public static void sort(int[] data) { \%=GM J^[p
sort(data, IMPROVED_QUICK); y5oC|v7
} Tj[=E
private static String[] name={ xfAnZBsVo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tN-U,6c]
}; VB(S]N)F^
ONc-jU^
private static Sort[] impl=new Sort[]{ Qv v~nGq$
new InsertSort(), Aw7oyC!
new BubbleSort(), hXF#KVqx
new SelectionSort(), },tN{()
new ShellSort(), HutwgPvy
new QuickSort(), }VetaO2*
new ImprovedQuickSort(), Py}] {?
new MergeSort(), f`^\v
new ImprovedMergeSort(), e\Igc.
new HeapSort() LBCat=d<
}; ]ULE>a
T/9`VB%N
public static String toString(int algorithm){ 295U<
return name[algorithm-1]; u)NmjW
} :h(r2?=7
pb`!_GmB
public static void sort(int[] data, int algorithm) { mrc% 6Ri
impl[algorithm-1].sort(data); cq?&edjP
} D(z}c,
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public static interface Sort { L5wrc4
public void sort(int[] data); 0\/cTNN
} 7QnQ=gu
h#EksX
public static void swap(int[] data, int i, int j) { Pr>Pxsr&
int temp = data; >I*Qc<X91
data = data[j]; -JMlk:~
data[j] = temp; j$%uip{
} #z.QBG@
} krt8yAkG