[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; 5eA]7$ic
} |T*qAJ8c
int i1=l; mC`! \"w
int i2=mid+1; q;.]e#wvh
for(int cur=l;cur<=r;cur++){ G>QTPXcD
if(i1==mid+1) sfE8b/Z8
data[cur]=temp[i2++]; HU9y{H
else if(i2>r) (_ah~VnO
data[cur]=temp[i1++]; ~py0Vx,F
else if(temp[i1] data[cur]=temp[i1++]; '.,.F0{x
else xQap44KPZ
data[cur]=temp[i2++]; u2-7vudh
} b_yXM
} u,:`5*al{
Bw.&3efd
} IviQ)hp
6a?p?I K^
改进后的归并排序: RCXSz
rrYp^xLa`
package org.rut.util.algorithm.support; PqLqF5`S
;NE/!!
import org.rut.util.algorithm.SortUtil; &Q>'U6"%
nD\os[ 3
/** T0%TeFY
* @author treeroot J|S^K kC
* @since 2006-2-2 mcr#Ze
* @version 1.0 "%*lE0Tx
*/ *J5RueUG
public class ImprovedMergeSort implements SortUtil.Sort { |wQZ~Ux:
X388Gs;e
private static final int THRESHOLD = 10; twmJ
n5*7~K"C
/* a<TL&
* (non-Javadoc) )Cvzj<Q0
* X@U1Ri
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :<k|u!b}y
*/ c0q)
public void sort(int[] data) { 4!vUksM
int[] temp=new int[data.length]; =@=R)C4f*
mergeSort(data,temp,0,data.length-1); } <4[(N
} NqE7[wH
LoE(W|nj
private void mergeSort(int[] data, int[] temp, int l, int r) { <Cu?$
int i, j, k; e-3pg?M
int mid = (l + r) / 2; lFGxW 5
if (l == r) tkqBCKpDa
return; ZM`P~N1?)g
if ((mid - l) >= THRESHOLD) a9zph2o-
mergeSort(data, temp, l, mid); x9A ZS#e)[
else %L>nXj
insertSort(data, l, mid - l + 1); (!5}" fj
if ((r - mid) > THRESHOLD) DN':-PK
mergeSort(data, temp, mid + 1, r); OKP_3Ns
else &iy(oM
insertSort(data, mid + 1, r - mid); cqL7dlhIl
{JCz^0DV
for (i = l; i <= mid; i++) { g*?+~0"`Y
temp = data; =GKYroNM
} jI`To%^Y
for (j = 1; j <= r - mid; j++) { Cmx2/N
temp[r - j + 1] = data[j + mid]; F%Umau*1
} =z1o}ga=EA
int a = temp[l]; m$mY<Q
int b = temp[r]; k5QD5/Ej
for (i = l, j = r, k = l; k <= r; k++) { 'oZn<c`
if (a < b) { }_(^/pnk
data[k] = temp[i++]; iz>y u[|
a = temp; .L5*E(<K0
} else { G4%M$LJh
data[k] = temp[j--]; m4SXH> o
b = temp[j]; :#:O(K1PW
} pUMB)(<k
} w+q;dc8
} agm5D/H]:
0!,gT H>
/** &xuwke:[
* @param data 6Y_O^f
* @param l dN\P&"`
* @param i 6+nMH +[
*/ )):22}I#
private void insertSort(int[] data, int start, int len) { dF11Rj,~ 8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^x"c0R^
} <ivqe"m
} &Dg)"Xji
} u4,X.3V]A
} b}&7~4zw
1;:t~Y
堆排序： nR@,ouB-$
gLSG:7m@
package org.rut.util.algorithm.support; `TD%M`a
?I2k6%a
import org.rut.util.algorithm.SortUtil; ?WQd
Q@W|GOH3
/** %f_OP$;fc
* @author treeroot UG"6RW @
* @since 2006-2-2 AK s39U'
* @version 1.0 )Z8"uRTb0
*/ R(?<97
public class HeapSort implements SortUtil.Sort{ [mf7>M`p]@
J"Y
/* (non-Javadoc) iPY vePQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <m/b]|
*/ yg-FJ/
public void sort(int[] data) { @6YBK+"
MaxHeap h=new MaxHeap(); Pm#x?1rAj
h.init(data); ~r>EF!U`h
for(int i=0;i h.remove(); tk)>CK11
System.arraycopy(h.queue,1,data,0,data.length); |IX`(
} 2^^'t6@
]Z$TzT&@%
private static class MaxHeap{ (O_t5<A*X
VU`z|nBW@
void init(int[] data){ mzV"G>,o
this.queue=new int[data.length+1]; /,Dwu?Lcqp
for(int i=0;i queue[++size]=data; ]o[X+;Tj|
fixUp(size); 3:~l2KIP4
} Q3Z%a|3W
} ~ACP%QM=
SGBVR^
private int size=0; I*:qGr+ WJ
J|"nwY}a9
private int[] queue; x?f0Hk+
pqH( Tbjq
public int get() { (o*e<y,}W
return queue[1]; vTMP&a'5L
} 4kaE}uKU
qb-2QPEB
public void remove() { RQo$iISwy
SortUtil.swap(queue,1,size--); KcmDF4C2
fixDown(1); :,S8T%d
} oP=T6PX~l
file://fixdown a81!~1A
private void fixDown(int k) { '"xL}8HX}
int j; 4j. |Y
while ((j = k << 1) <= size) { qu<B%v
if (j < size %26amp;%26amp; queue[j] j++; LZUA+x(
if (queue[k]>queue[j]) file://不用交换 d DIQ+/mmg
break; !v-w6WG"
SortUtil.swap(queue,j,k); |C$:]MZx
k = j; 4V228>9w
} =GH@.3`X
} H]tSb//qc
private void fixUp(int k) { N#RD:"RS!
while (k > 1) { SaR}\Up
int j = k >> 1; waXDGdl0
if (queue[j]>queue[k]) ~@-QbkC
break; h9<mThvgn
SortUtil.swap(queue,j,k); nszpG1U:
k = j; UzU-eyA
} q,;".3VQ
} W$JY M3!
u\()E|?p
} ERfd7V<c>
VMxYZkMNd_
} C!ZI&cD9
tp1KP/2w[
SortUtil： (XbMrPKG
FylWbQU9
package org.rut.util.algorithm; /'Quu)~
*=$[}!YG
import org.rut.util.algorithm.support.BubbleSort; /'&.aGW4%
import org.rut.util.algorithm.support.HeapSort; *Nvy+V
import org.rut.util.algorithm.support.ImprovedMergeSort; gro7*<
import org.rut.util.algorithm.support.ImprovedQuickSort; rPiiC/T.`
import org.rut.util.algorithm.support.InsertSort; YW8K $W
import org.rut.util.algorithm.support.MergeSort; W>p\O9BG
import org.rut.util.algorithm.support.QuickSort; 5E]UI YAkV
import org.rut.util.algorithm.support.SelectionSort; hi;WFyJTu
import org.rut.util.algorithm.support.ShellSort; wUZQB1$F
NK+FQ^m[
/** '^Pq(b~
* @author treeroot (j8GiJ]{L,
* @since 2006-2-2 u;+%Qh
* @version 1.0 pG,<_N@P
*/ ",~ b2]ym
public class SortUtil { ]PR|d\O
public final static int INSERT = 1; o5N]((9
public final static int BUBBLE = 2; 0M#N=%31
public final static int SELECTION = 3; dr|| !{\
public final static int SHELL = 4; YH<$ +U
public final static int QUICK = 5; X+`ddX
public final static int IMPROVED_QUICK = 6; -@%t"8
public final static int MERGE = 7; U9<_6Bsd
public final static int IMPROVED_MERGE = 8; _-@ZOhw&
public final static int HEAP = 9; n\Z^K
tv 4s12&
public static void sort(int[] data) { Fy 4Tvg
sort(data, IMPROVED_QUICK); *oEv,I_
} `j"4:
private static String[] name={ ]{K5zSK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ((-aC`
}; -;+m%"k5
X!U]`Qh
private static Sort[] impl=new Sort[]{ _wm~}_Q
new InsertSort(), $!3gN%
new BubbleSort(), /\TQc-k?2
new SelectionSort(), }7iUagN
new ShellSort(), 3xBN10R#
new QuickSort(), 5c<b|
new ImprovedQuickSort(), MS{Hz,I,
new MergeSort(), m3U+ du
new ImprovedMergeSort(), ^D9 /
new HeapSort() i'M^ez)u
}; !?BW_vY
AGh~8[
public static String toString(int algorithm){ 536^PcJlN
return name[algorithm-1]; S8*^ss>?^R
} 5+y@ ]5&g
*w=z~Jq^R"
public static void sort(int[] data, int algorithm) { /t$rX3A
impl[algorithm-1].sort(data); utq.r_
} qzz[y#q(
#t=[w
public static interface Sort { I") H~
public void sort(int[] data); zTkFX67)
} 3sS=?q
NV&;e[z
public static void swap(int[] data, int i, int j) { U^B"|lc:[
int temp = data; K{|w 43>D
data = data[j]; $TR=3[j
data[j] = temp; :L]-'\y
} NU|qX {-
} _mw13jcN]