[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; |`ya+/ff+
} ?(Se$iTZ
int i1=l; OZc4 -5
int i2=mid+1; }y%c.
for(int cur=l;cur<=r;cur++){ J>l?HK
if(i1==mid+1) |v:oLgUdH
data[cur]=temp[i2++]; acrR
else if(i2>r) AH{#RD
data[cur]=temp[i1++]; cY5w,.Q/!
else if(temp[i1] data[cur]=temp[i1++]; LZ34x: ,C
else 6Hbu7r*tm
data[cur]=temp[i2++]; g,9&@g/
} 3 ,zW6-}
} M>E~eb/
qk~m\U8r
} X=+|(A,BdY
w73?E#8
改进后的归并排序: nU4to
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package org.rut.util.algorithm.support; 5U-SIG*
]A;.}1'
import org.rut.util.algorithm.SortUtil; yky%+@2q
F r!FV4
/** -MRX@a^1
* @author treeroot 5JHWt<n{P
* @since 2006-2-2 V/3@iOwD
* @version 1.0 7u{V1_n1
*/ ^Q6?T(%$
public class ImprovedMergeSort implements SortUtil.Sort { WBD?|Ss
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private static final int THRESHOLD = 10; @R-11wP)M
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/* b'``0OB)
* (non-Javadoc) M8Vc5
* h!@7'Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ollsB3]]
*/ `OfD^Q=
public void sort(int[] data) { SJ91(K
int[] temp=new int[data.length]; Q^;:Kl.b
mergeSort(data,temp,0,data.length-1); ua"2nVxK_K
} s+~GQcj<T
PB *v45
private void mergeSort(int[] data, int[] temp, int l, int r) { []v$QR&u#v
int i, j, k; )s,LFIy<A
int mid = (l + r) / 2; Gx %=&O
if (l == r) (dZ]j){
return; [YP{%1*RM
if ((mid - l) >= THRESHOLD) [GPCd@
mergeSort(data, temp, l, mid); y XKddD
else `Xz!apA
insertSort(data, l, mid - l + 1); iO&*WIbg
if ((r - mid) > THRESHOLD) _p>F43%p
mergeSort(data, temp, mid + 1, r); 4(*PM&'R
else J%-4ZB"
insertSort(data, mid + 1, r - mid); `m#-J;la
%&_^I*
for (i = l; i <= mid; i++) { ~4pP( JP
temp = data; ;>>n#8`
} }K8e(i6z
for (j = 1; j <= r - mid; j++) { }toe'6
temp[r - j + 1] = data[j + mid]; 51JB,}dGH}
} HdgNy\
int a = temp[l]; 4(sHUWT
int b = temp[r]; mogmr
for (i = l, j = r, k = l; k <= r; k++) { ;p2b^q'
if (a < b) { I 1n,c d[
data[k] = temp[i++]; 5[g\.yi2_]
a = temp; [zBi*%5O
} else { 4w~%MZA^
data[k] = temp[j--]; {aNpk,n
b = temp[j]; `<yQ`Y_X
} =/_uk{
} J,:&U wkv
} 2mnAL#
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/** X3a9-
* @param data #gqh0 27
* @param l =qc+sMo
* @param i BO#tn{(#
*/ c\2rKqFD8
private void insertSort(int[] data, int start, int len) { (T0MWp0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PBnH#zm
} /ZD6pF
} m)} 01N4
} tnaFbmp
} cLl~4jL
u*v<dsGQ
堆排序： =V]0G,,\
7dcR@v`c
package org.rut.util.algorithm.support; *s*Y uY%y
')!X1A{
import org.rut.util.algorithm.SortUtil; Oo@o$\+v
i4,p\rE0
/** BH1h2OEe#
* @author treeroot VK]U*V1
* @since 2006-2-2 UL-_z++G
* @version 1.0 sa4w.9O1GS
*/ J6n>{iE
public class HeapSort implements SortUtil.Sort{ T"[]'|'
$GFR7YC 7
/* (non-Javadoc) Z.Yq)\it
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k1q/L|')
*/ oDV6[e
public void sort(int[] data) { 6ki2/ Q
MaxHeap h=new MaxHeap(); ^APtV6g
h.init(data); xy[#LX)RW
for(int i=0;i h.remove(); 29,ET}~
System.arraycopy(h.queue,1,data,0,data.length); IGcq*mR=
} ?}Zt&(#
,JE_aje7
private static class MaxHeap{ Q0Ft.b
X)[tb]U/Wx
void init(int[] data){ }a||@unr
this.queue=new int[data.length+1]; -p&u=
for(int i=0;i queue[++size]=data; L)bMO8JH~m
fixUp(size); ##=$$1Ki
} OQ&N]P2p
} VFL^-tXnA^
"vSKj/]
private int size=0; NC%hsg^0/
4}h}`KZZ
private int[] queue; yl~_~<s6
WJOoDS!i
public int get() { (MI>7| ';
return queue[1]; \4q|Qno8
} qK a}O*
GYfOwV!zB
public void remove() { [|OII!"
SortUtil.swap(queue,1,size--); b&+zAt.
fixDown(1); \~l_w ,Poo
} `SFeln{1B
file://fixdown <ToBVGX
private void fixDown(int k) { Y/kq!)u;%L
int j; hc3hU
while ((j = k << 1) <= size) { ZOqS"3j! j
if (j < size %26amp;%26amp; queue[j] j++; x%=CEe?6
if (queue[k]>queue[j]) file://不用交换 FAEF
break; ]8\I{LR
SortUtil.swap(queue,j,k); s2{SbOBis
k = j; Ev5~= ]
} LigB!M
} fz=?QEG
private void fixUp(int k) { {siOa%;*
while (k > 1) { '\I(n|\
int j = k >> 1; 2+gbMd4n
if (queue[j]>queue[k]) p H y
break; C7FQc{
SortUtil.swap(queue,j,k); y4Jc|)
k = j; I_ mus<sE
} iPTQqx-m$7
} Hw]E#S
tp] 5[U
} V:kRr cX
.J)TIc__|A
} T;/GHC`{Y
|#@7$#j
SortUtil： `F7]M
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package org.rut.util.algorithm; }tW-l*\U
%+(AKZu:
import org.rut.util.algorithm.support.BubbleSort; t]LiFpy2IC
import org.rut.util.algorithm.support.HeapSort; a:)FWdp?9
import org.rut.util.algorithm.support.ImprovedMergeSort; R ZY=c
import org.rut.util.algorithm.support.ImprovedQuickSort; H2s:M
import org.rut.util.algorithm.support.InsertSort; _J l(:r\%
import org.rut.util.algorithm.support.MergeSort; ~?F,kmO}?
import org.rut.util.algorithm.support.QuickSort; y&zFS4"x
import org.rut.util.algorithm.support.SelectionSort; 8%7%[WC#
import org.rut.util.algorithm.support.ShellSort; &:&89<C'
?bB>}:~j)
/** *p}mn#ru-
* @author treeroot gF{ehU%
* @since 2006-2-2 v|%41xOsr
* @version 1.0 a;HAuy`M x
*/ E5&Z={
public class SortUtil { :(n<c
public final static int INSERT = 1; I}4 PB+yu
public final static int BUBBLE = 2; uQ5h5Cfz
public final static int SELECTION = 3; -F~DOG%
public final static int SHELL = 4; d.wGO]"
public final static int QUICK = 5; Tc6cBe,
public final static int IMPROVED_QUICK = 6; 2I-d.{
public final static int MERGE = 7; o&?c,FwN
public final static int IMPROVED_MERGE = 8; G]'ah1W
public final static int HEAP = 9; ^c\O,*:
$+*nb4
public static void sort(int[] data) { |Kd#pYt%O
sort(data, IMPROVED_QUICK); f$o^Xu
} Sa= tiOv
private static String[] name={ G(&[1V%x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^PZ[;F40
}; S<i$0p8J;
rOSov"7
private static Sort[] impl=new Sort[]{ iHD!v7d7
new InsertSort(), 2LwJ%!
new BubbleSort(), ]@&X*~c^Z
new SelectionSort(), (C!p2f
new ShellSort(), V?u#WJy/
new QuickSort(), d&#_t@%
new ImprovedQuickSort(), v~nKO?{
new MergeSort(), E\[BE<y
new ImprovedMergeSort(), [3m\~JtS
new HeapSort() 68tyWd}
}; <Ua~+U(FR0
3B1\-ry1M
public static String toString(int algorithm){ pDR~SxBXr
return name[algorithm-1]; O?e9wI=H
} 0'Pjnk-i
VE )D4RL
public static void sort(int[] data, int algorithm) { Unk/uk
impl[algorithm-1].sort(data); @{y'_fw
} op6]"ZV-C
],]Rv#`
public static interface Sort { fkxkf^g)
public void sort(int[] data); pR S!
} o:d7IL
ppAbG,7
public static void swap(int[] data, int i, int j) { 0?7yM:!l
int temp = data; PIri|ZS
data = data[j]; C >*z^6Gz
data[j] = temp; `OfhzOp
} NL9.J@"b
} J>Ar(p