[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; _eJXi,
} w6T[hZ 9
int i1=l; 5@P%iBA4(3
int i2=mid+1; X^}A*4j
for(int cur=l;cur<=r;cur++){ Rj[hhSx 2
if(i1==mid+1) TUh&d5a9H
data[cur]=temp[i2++]; ]^=|Zd-
else if(i2>r) gmh5 %2M
data[cur]=temp[i1++]; KRYcCn
else if(temp[i1] data[cur]=temp[i1++]; fb\DiKsW
else EgTFwEj
data[cur]=temp[i2++]; ep+
} ao#!7F
} M[, D *
`SV"ElRV
} cjuZBFl
/X4yB"J>
改进后的归并排序: zfhTc=(/
v`JF\"}S
package org.rut.util.algorithm.support; N.Dhu~V
Q48+O?&
import org.rut.util.algorithm.SortUtil; }e<'BIME
}N3V5cab
/** kG/X"6pZ
* @author treeroot c=6ahX}d
* @since 2006-2-2 2-++i:, g
* @version 1.0 t|}O.u-&;~
*/ AZ[75>
public class ImprovedMergeSort implements SortUtil.Sort { )kYOHS
'b^l'KN:S
private static final int THRESHOLD = 10; ~eP
'>@4(=I
/* LP:nba:
* (non-Javadoc) |h}B{D
* h T<n1q~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N{8"s&
*/ >1 @Ltvm
public void sort(int[] data) { `)32&\
int[] temp=new int[data.length]; ueDvMP
mergeSort(data,temp,0,data.length-1); St@l]u9
} Ekv89swl`i
$X*mdji
private void mergeSort(int[] data, int[] temp, int l, int r) { #~^btL'dHF
int i, j, k; #,L~w
int mid = (l + r) / 2; 7^$)VBQ/
if (l == r) XS?gn.o\
return; "PMQyzl
if ((mid - l) >= THRESHOLD) +t98@
mergeSort(data, temp, l, mid); ?aBj#
else mEFw|M{
insertSort(data, l, mid - l + 1); Yd:Q`#7A
if ((r - mid) > THRESHOLD) f1mHN7hxW
mergeSort(data, temp, mid + 1, r); !VwmPAMr#v
else y4@gGC=
insertSort(data, mid + 1, r - mid); Yi(1^'Bi
d?A}qA[(
for (i = l; i <= mid; i++) { -v+&pG?m
temp = data; B5ea(j
} wu)Wg-dT
for (j = 1; j <= r - mid; j++) { ~,"N[Q
temp[r - j + 1] = data[j + mid]; B8T\s)fxnX
} +4et7
int a = temp[l]; $&hN*7Ts
int b = temp[r]; p3c"ZPO~z
for (i = l, j = r, k = l; k <= r; k++) { %r%So_^
if (a < b) { Qzqc .T
data[k] = temp[i++]; a+`D'?z
a = temp; PWH^=K
} else { =E(#YCx
data[k] = temp[j--]; }aF
b = temp[j]; jk*tL8?i
} w{!(r
} ExVDkt0
} E{4 e<%Y,
gbDX7r-
/** cWMUj K/N
* @param data yto[8;)_
* @param l F";.6%;AC
* @param i F;8*H1
*/ c 6"Ib)
private void insertSort(int[] data, int start, int len) { Xc*U+M>U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %'bJ:
} n[,XU|2
} |a-fE]{7
} 6)qp*P$L
} rh!;|xB|+
#(KDjnP[
堆排序： HeLG?6
p@~ic#X
package org.rut.util.algorithm.support; m^V5*JIh
, sjh^-;
import org.rut.util.algorithm.SortUtil; thc <xxRP
_Mk7U@j+9
/** +D&Pp0xe
* @author treeroot uo2'"@[e
* @since 2006-2-2 ! zL1;d
* @version 1.0 tF7hFL5f
*/ tGjhHp8}c
public class HeapSort implements SortUtil.Sort{ D+JAK!W
h!gk s-0
/* (non-Javadoc) WBr59@V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >Lft9e
*/ 8`=v.
public void sort(int[] data) { s@8w-]"
MaxHeap h=new MaxHeap(); -TO\'^][X
h.init(data); t~``md4
for(int i=0;i h.remove(); 3Fs5RC~a
System.arraycopy(h.queue,1,data,0,data.length); &c>?~-!W
} /3!fA=+
o]ePP,
private static class MaxHeap{ ]fBUT6
:YP#
void init(int[] data){ d\]Yk]r
this.queue=new int[data.length+1]; ;Hmp f0$
for(int i=0;i queue[++size]=data; wSEWwU[
fixUp(size); 0hY{<^"Y
} v6GPS1:a
} i#/]KsSp
!| #83
private int size=0; HCWNo
Y}s@WJ
private int[] queue; {pL+2%`~
[sF(#Y:I
public int get() { G2Vv i[c
return queue[1]; P 43P]M2
} 0[Ht_qxb
3djC;*,9,
public void remove() { xtfBfA
SortUtil.swap(queue,1,size--); i,IB!x
fixDown(1); H/+B%2Zj
} z^<L(/rg9"
file://fixdown UC HZ2&
private void fixDown(int k) { 3]RyTQ
int j; +Q$h ]^>~
while ((j = k << 1) <= size) { tM4Cx
if (j < size %26amp;%26amp; queue[j] j++; TX=yPq
if (queue[k]>queue[j]) file://不用交换 T4)fOu3]
break; nUS| sh
SortUtil.swap(queue,j,k); ) ZfdQ3
k = j; y5r4+2B
} T 20&F
} Fqy\CMC
private void fixUp(int k) { t.p~\6Yi
while (k > 1) { 5Xn.CBd]
int j = k >> 1; lVOu)q@l7g
if (queue[j]>queue[k]) @$9'@")
break; F$BbYf2i
SortUtil.swap(queue,j,k); V#REjsf,t-
k = j; Zf$Np50@(
} d?wc*N3
} rf~Y6U?7
8N&+7FK
} 1u3,'8F
L){iA-k;Ec
} \K`L3*cBKK
5GA C`}}
SortUtil： v6.t{6zYgY
M?m,EQh.
package org.rut.util.algorithm; ^=>Tk$ _2
?POUtRN
import org.rut.util.algorithm.support.BubbleSort; oND@:>QBF
import org.rut.util.algorithm.support.HeapSort; `F<jLU^3
import org.rut.util.algorithm.support.ImprovedMergeSort; Guz"wY
import org.rut.util.algorithm.support.ImprovedQuickSort; KlRr8G!Z
import org.rut.util.algorithm.support.InsertSort; h/?l4iR*
import org.rut.util.algorithm.support.MergeSort; ;X*cCb`h
import org.rut.util.algorithm.support.QuickSort; )e5 @
import org.rut.util.algorithm.support.SelectionSort; wLK07e(
import org.rut.util.algorithm.support.ShellSort; (e(:P~Ry
<-D/O$q
/** ^8.]d~j
* @author treeroot 8J$|NYv_b
* @since 2006-2-2 9mA{K
* @version 1.0 .X# `k
*/ ^[:p|U2mA
public class SortUtil { 1-lu\"H`
public final static int INSERT = 1; nRyU]=-X
public final static int BUBBLE = 2; n]E?3UGD@W
public final static int SELECTION = 3; Cj~'Lhmv'T
public final static int SHELL = 4; 2hzsKkrA {
public final static int QUICK = 5; {~Rk2:gx
public final static int IMPROVED_QUICK = 6; aDO!
public final static int MERGE = 7; QQWadVQo
public final static int IMPROVED_MERGE = 8; EoK~S\dS
public final static int HEAP = 9; lOtDqb&
0c} }Q
public static void sort(int[] data) { yKO`rtP
sort(data, IMPROVED_QUICK); vZ.x{"n'~
} <HbcNE~
private static String[] name={ ``wSc0\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s"t$0cH9
}; >=[(^l
'Lu__NfN
private static Sort[] impl=new Sort[]{ '7XIhN9
new InsertSort(), z`:lcF{V
new BubbleSort(), (Jz1vEEV
new SelectionSort(), xlQBe-Wg
new ShellSort(), 4$P0:
new QuickSort(), o!)3?
new ImprovedQuickSort(), On?p 9^9
new MergeSort(), 8-2cRs
new ImprovedMergeSort(), 7(pF[LCF
new HeapSort() I:mr}mv=i
}; C.FI~Z
."9];)2rx
public static String toString(int algorithm){ Oil?JI Hq
return name[algorithm-1]; euC&0Ee2
} Hv2De0W
j KoG7HH
public static void sort(int[] data, int algorithm) { V$ps>
impl[algorithm-1].sort(data); Z<vKQ4G
} tCdqh-
c@893<_
public static interface Sort { MdvcnaCG
public void sort(int[] data); 9jw\s P@
} V,cBk
p,eTY[k?
public static void swap(int[] data, int i, int j) { Ft&]7dT{W
int temp = data; `\}v#2VJ
data = data[j]; lhqg$lb
data[j] = temp; ;C2K~8,
} #w' kV#
} [Al&