[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; hLF;MH@
} B):hm
int i1=l; {`=k$1
int i2=mid+1; D);w)`
for(int cur=l;cur<=r;cur++){ J3,m{%EtNM
if(i1==mid+1) ]Ofs,U^
data[cur]=temp[i2++]; Pj{Y
else if(i2>r) 22FHD4
data[cur]=temp[i1++]; /L*JHNu"_
else if(temp[i1] data[cur]=temp[i1++]; .l +yK-BZ
else BSHtoD@e7
data[cur]=temp[i2++]; [LDY;k~5+
} vnD `+y
} sG8G}f
pT'jX^BU
} 6"<q{K
^F:Bj&0v[
改进后的归并排序: k`h#.B J
^!sIEL
package org.rut.util.algorithm.support; .vWwYG
YK%rTbB(
import org.rut.util.algorithm.SortUtil; ,#Mt10e{
`e^sQ>rDI
/** WWG+0jQ9
* @author treeroot dBEm7.nh
* @since 2006-2-2 !?5YXI,
* @version 1.0 M}x]\#MMY
*/ @"__2\ 0
public class ImprovedMergeSort implements SortUtil.Sort { R(on[g_1
,f^ICM
private static final int THRESHOLD = 10; rWNywxnT
osZ]R
/* 5`p>BJ+n
* (non-Javadoc) f_'8l2jK1i
* <#~n5W{l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *^[j6
*/ V?&P).5)
public void sort(int[] data) { g[$4a4X
int[] temp=new int[data.length]; G-eSHv
mergeSort(data,temp,0,data.length-1); ndS8p]P&o(
} /MZ^;XG
Q?/qQ}nNw
private void mergeSort(int[] data, int[] temp, int l, int r) { jj6yf.r6c
int i, j, k; ch]{=61
int mid = (l + r) / 2; jH?!\F2)+
if (l == r) ED^0t
return; aDda&RM
if ((mid - l) >= THRESHOLD) uS7kkzt-x
mergeSort(data, temp, l, mid); _(F8}s
else ubUVxYD?
insertSort(data, l, mid - l + 1); ]8CgHT[^7
if ((r - mid) > THRESHOLD) qrufnu5cC
mergeSort(data, temp, mid + 1, r); HMmB90P`
else iB#*XJ;q
insertSort(data, mid + 1, r - mid); cV:Ak~PKl
|&U{ z?
for (i = l; i <= mid; i++) { 2B"&WKk
temp = data; frT<9$QUL
} }No8to
for (j = 1; j <= r - mid; j++) { T( fcE
temp[r - j + 1] = data[j + mid]; ~|( eh9
} FwUgMR*xq
int a = temp[l]; `T3B
int b = temp[r]; #*X\pjZ
for (i = l, j = r, k = l; k <= r; k++) { Eo>EK>
if (a < b) { v-DZW,
data[k] = temp[i++]; Fs&r^ [/b
a = temp; t^~Qv
} else { XeX`h_
data[k] = temp[j--]; bXk(wXX
b = temp[j]; o>\o=%D.a
} pD;fFLvN
} :f~qt%%/
} }/2M?W0
(9Q@I8}Iy
/** %"^8$A?>,k
* @param data e%C_>
* @param l $[\\{XJ.
* @param i nXw98;
*/ ||4T*B06
private void insertSort(int[] data, int start, int len) { '^M.;Giz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g cb6*@u!
} qKTzigjj
} F}?4h Dt
} n j2=}6
} -ARks_\
i!)\m0Wm
堆排序： oI-,6G}
**JBZ\'
package org.rut.util.algorithm.support; sO{TGk]*
f$ 7C 5
import org.rut.util.algorithm.SortUtil; qHnX)
<iB5&
/** ?[7KN8$
* @author treeroot 1>Q4&1Vn
* @since 2006-2-2 Ll.P>LH
* @version 1.0 J";4+wA7
*/ < n/ 2
public class HeapSort implements SortUtil.Sort{ }$i/4?dYsQ
9}5o> iR
/* (non-Javadoc) VS>xvF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) glLoYRTi
*/ %77uc9}
public void sort(int[] data) { p>B-Ubu
MaxHeap h=new MaxHeap(); <Xw\:5 F<7
h.init(data); ,Oe:SZJ>
for(int i=0;i h.remove(); :kFPPx?
System.arraycopy(h.queue,1,data,0,data.length); R3%%;`c=
} qA"BoSw4
51Vqbtj^
private static class MaxHeap{ -iKoQkHt
p6!5}dD(
void init(int[] data){ ~d\^ynQ
this.queue=new int[data.length+1]; t YxN^VqU
for(int i=0;i queue[++size]=data; O_]hbXV0
fixUp(size); Ec@cW6g(%
} &gKDw!al
} qw1W}+~g
#k?.dWZ!
private int size=0; \&b 9
`QtkC>[
private int[] queue; +P8CC fPu
)ZI#F]
public int get() { Em !%3C1r
return queue[1]; ]|tR8`DGZ%
} `][vaLd`Q
$JUkwsc
public void remove() { .+kg1=s
SortUtil.swap(queue,1,size--); S`$%C=a.
fixDown(1); x-]:g&5T
} t+_\^Oa)
file://fixdown <ZheWl
private void fixDown(int k) { hz*T"HJ]t
int j; lv9Tq5C
while ((j = k << 1) <= size) { JOJuGB-d
if (j < size %26amp;%26amp; queue[j] j++; fp*6Dv_
if (queue[k]>queue[j]) file://不用交换 [$;cjys
break; v>j,8E
SortUtil.swap(queue,j,k); Va?i#<a
k = j; ZZ Hjv
} +3J<vM}dy
} }0tHzw=#%e
private void fixUp(int k) { 4.^T~n G
while (k > 1) { #:By/9}-
int j = k >> 1; xy b=7
if (queue[j]>queue[k]) mPHto-=fB
break; c@Br_-
SortUtil.swap(queue,j,k); .$7RF!p
k = j; ]YtN6Rq/
} ]tf`[bINP
} OGIv".~s4
x;<0Gg~jB
} NyT%S?@y<
@HPr;m!
} OTE,OCB[
:P/VBXh
SortUtil： :9av]Yv&
cc3B}^@p=
package org.rut.util.algorithm; ^2);*X>
GcDA0%i
import org.rut.util.algorithm.support.BubbleSort; L9N}lH
import org.rut.util.algorithm.support.HeapSort; n}_}#(a
import org.rut.util.algorithm.support.ImprovedMergeSort; 2Z%n "z68
import org.rut.util.algorithm.support.ImprovedQuickSort; -gm5Eqi
import org.rut.util.algorithm.support.InsertSort; -fXQ62:S
import org.rut.util.algorithm.support.MergeSort; 9!(%Vf>
import org.rut.util.algorithm.support.QuickSort; }dpTR9j=
import org.rut.util.algorithm.support.SelectionSort; !y B4;f$
import org.rut.util.algorithm.support.ShellSort; Li]96+C$}
('7$K
/** df$.gP
* @author treeroot w%s];EE
* @since 2006-2-2 :L@n(buRN
* @version 1.0 s .<.6t:G4
*/ \8=)X})
public class SortUtil { R~T}
public final static int INSERT = 1; _dRB=bl"O
public final static int BUBBLE = 2; VnVBA-#r|
public final static int SELECTION = 3; ^3BPOK[*gB
public final static int SHELL = 4; i%[gNh
public final static int QUICK = 5; %~x?C4L8
public final static int IMPROVED_QUICK = 6; /'aqQ K<
public final static int MERGE = 7; (Hj[9[=
public final static int IMPROVED_MERGE = 8; ;Mo_B9
public final static int HEAP = 9; p]EugLEmG
]"b:IWPeI
public static void sort(int[] data) { ?tL' X
sort(data, IMPROVED_QUICK); "3\y~<8%'
} "gJ.mhHX
private static String[] name={ NIVR;gm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~abyjM
}; X!K>.r_Dg
`(h^z>%
private static Sort[] impl=new Sort[]{ nAWb9Yk
new InsertSort(), n0T|U
new BubbleSort(), S4`X^a}pY
new SelectionSort(), ` PQQU~^
new ShellSort(), SMD*9&,
new QuickSort(), 5{k,/Z[L
new ImprovedQuickSort(), 'E9{qPLk(
new MergeSort(), h{iuk3G`h6
new ImprovedMergeSort(), P O 5Wi
new HeapSort() a`n)aXU l
}; OcO/wA(&{
`DF49YP"~
public static String toString(int algorithm){ /0H}-i
return name[algorithm-1]; Gmi?xGn
} J)Y`G4l2@
e)n ,Y
public static void sort(int[] data, int algorithm) { y;Cs#eo
impl[algorithm-1].sort(data); F`m}RL]g
} babL.Ua8o
:\P@c(c{^C
public static interface Sort { 8 E\zjT!#\
public void sort(int[] data); qvSYrnpn
} :Q>e54]'&
p$9Aadi]
public static void swap(int[] data, int i, int j) { / Qd` ?
int temp = data; U,#x\[3!Jt
data = data[j]; lQ`=PFh
data[j] = temp; :>{!%-1Z
} H^*AaA9-
} A6]X aF