[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; ]OE{qXr{
} 0jsU^m<g
int i1=l; 9OeY59 :
int i2=mid+1; J 00%,Ju_
for(int cur=l;cur<=r;cur++){ >;N0( xB
if(i1==mid+1) li4rK<O
data[cur]=temp[i2++]; Ng?n}$g*
else if(i2>r) D6trqB
data[cur]=temp[i1++]; -0 [^w
else if(temp[i1] data[cur]=temp[i1++]; ]>NP?S )R
else \dAh^BK1(
data[cur]=temp[i2++]; )&"l3*x
} K<O1PrC
} #:{Bd8PS
OXy>Tlv
} S{7*uK3$
4#$~gTc@
改进后的归并排序: qm-G=EX
x[+t
package org.rut.util.algorithm.support; #2thg{5
Vx5ioA]{
import org.rut.util.algorithm.SortUtil; #%4-zNS
i]:T{2
/** ~7Ey9wRkD
* @author treeroot [HJ^'/bB'
* @since 2006-2-2 =@U~sl[
* @version 1.0 )_P|_(
*/ sgdxr!1?y
public class ImprovedMergeSort implements SortUtil.Sort { uV r6tb1
.0l0*~[
private static final int THRESHOLD = 10; ^uzJu(
4^T@n$2N
/* S) /(~
* (non-Javadoc) TFbMrIF
* <StyO[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jTbJL
*/ _RT3Fk
public void sort(int[] data) { *ip2|2G$
int[] temp=new int[data.length]; 8=rD'*
mergeSort(data,temp,0,data.length-1); e_Na_l]
} EQDsbG0x
C%ibIcm y
private void mergeSort(int[] data, int[] temp, int l, int r) { zQJ9V\0
int i, j, k; fD3}s#M*G
int mid = (l + r) / 2; Zgt:ZO
if (l == r) gTE/g'3
return; kB-%T66\
if ((mid - l) >= THRESHOLD) [A?Dx-R;(
mergeSort(data, temp, l, mid); ?\MvAG7Y
else xc.(-g[
insertSort(data, l, mid - l + 1); 6eSc`t&
if ((r - mid) > THRESHOLD) Fp>iwdjFg
mergeSort(data, temp, mid + 1, r); *NdSL
else `y5?lS*
insertSort(data, mid + 1, r - mid); Ca]+*Eb9z{
$2Y'[Dto\
for (i = l; i <= mid; i++) { ^z#'o
temp = data; p._BG80
} "'us.t.
for (j = 1; j <= r - mid; j++) { CV%AqJN
temp[r - j + 1] = data[j + mid]; 1Zc1CUMG
} t#tAvwFM8
int a = temp[l]; iR;Sd >)
int b = temp[r]; 6/`$Y!.ub
for (i = l, j = r, k = l; k <= r; k++) { H79XP.TtE
if (a < b) { >U\,(VB
data[k] = temp[i++]; :_;9&[H9ha
a = temp; kwRXNE(k]_
} else { Mg?^5`*
data[k] = temp[j--]; \.+.VK
b = temp[j]; 4.|-?qG
} Z-3i -(
} *I)oDq3
} qgd#BJ=
-oo&8
/** 9%e&Z'l
* @param data f/t1@d!
* @param l T|o[! @:,
* @param i &z[39Q{~
*/ qkB)CY7
private void insertSort(int[] data, int start, int len) { Fm(~Vt;%u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i$HA@S
} 7'pCFeA>=T
} 5y07@x
} e;KZTH;
} F(*~[*Ff
t]?u<KD<
堆排序： j0b?dKd
S-{3'D[Nj
package org.rut.util.algorithm.support; bl. y4
MNURYA=
import org.rut.util.algorithm.SortUtil; u^H:z0
S2nF13u
/** :#8#tLv
* @author treeroot ,c#IxB/0
* @since 2006-2-2 Bbuy y
* @version 1.0 L~N<<8?\
*/ dKyJ.p
public class HeapSort implements SortUtil.Sort{ <eRE;8C-
%Od?(m"&
/* (non-Javadoc) v;.7-9c*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \sB a
*/ rjzRZ
public void sort(int[] data) { k(|D0%#b7
MaxHeap h=new MaxHeap(); P_11N9C
h.init(data); [<m1xr4"k
for(int i=0;i h.remove(); iB#xUSkS
System.arraycopy(h.queue,1,data,0,data.length); NoS|lT
} K3jKOV8
hES_JbX}]
private static class MaxHeap{ v%O KOrJ
sE87}Lz
void init(int[] data){ Pg[XIfBva
this.queue=new int[data.length+1]; #rSm;'%,
for(int i=0;i queue[++size]=data; 3@XkO
fixUp(size); h3rdqx1
} 9W3zcL8
} O>]I!n`!!A
hwkm'$}
private int size=0; _t[RHrs
0BF'@r";
private int[] queue; xa+=9=<AQ
&,B\ig1Jf
public int get() { eSvS<\p
return queue[1]; !d Ns3d
} +3]1AJa
6Y4sv5G
public void remove() { ,PH;j_
SortUtil.swap(queue,1,size--); AD_RU_a9
fixDown(1); ];& @T\Rj
} 'Fi\Qk'D@
file://fixdown AlP}H~|M7
private void fixDown(int k) { nrqr p
int j; wc?`QX}I
while ((j = k << 1) <= size) { ' S%?&4
if (j < size %26amp;%26amp; queue[j] j++; lYz{#UX}
if (queue[k]>queue[j]) file://不用交换 u#9H
break; W"j&':xD
SortUtil.swap(queue,j,k); Z$qLY<aV
k = j; m-V_J`9"
} [n%=2*1p
} xgsEJE
private void fixUp(int k) { {4B{~Qe;
while (k > 1) { NP }b
int j = k >> 1; `M0m`Up
if (queue[j]>queue[k]) klkshlk d
break; U^aMh-
SortUtil.swap(queue,j,k); (^h2'uB
k = j; R@ksYC3 F
} Mn`);[
} hnOo T? V
< cNJrer
} Y!!w*G9b
pBo=omQV
} FU]jI[
Cp!bsasj
SortUtil： *@;Pns]L-
_.)6~
package org.rut.util.algorithm; JDbRv'F:(
i n$~(+
import org.rut.util.algorithm.support.BubbleSort; 'YFy6rds
import org.rut.util.algorithm.support.HeapSort; MS7rD%(,'
import org.rut.util.algorithm.support.ImprovedMergeSort; x-E@[=
import org.rut.util.algorithm.support.ImprovedQuickSort; 'ozu4y
import org.rut.util.algorithm.support.InsertSort; TR7j`?
import org.rut.util.algorithm.support.MergeSort; wqx9
import org.rut.util.algorithm.support.QuickSort; Pp{Re|.
import org.rut.util.algorithm.support.SelectionSort; @$G{t^&os
import org.rut.util.algorithm.support.ShellSort; }BFX7X
i#4}xvi
/** 3Gk\3iU!
* @author treeroot :OEovk(`
* @since 2006-2-2 g"}j
* @version 1.0 dbe\ YE
*/ IjaFNZZC!
public class SortUtil { ]a=n(`l?
public final static int INSERT = 1; s:/Wz39SY3
public final static int BUBBLE = 2; Y|X!da/
public final static int SELECTION = 3; d?6\
public final static int SHELL = 4; %4$J.6M
public final static int QUICK = 5; '&LH9r
public final static int IMPROVED_QUICK = 6; Q8h0:Q
public final static int MERGE = 7; 3[*x'"Q;H
public final static int IMPROVED_MERGE = 8; O\X=vh/D
public final static int HEAP = 9; e'dx Y(
"wi}/,)
public static void sort(int[] data) { q9gk:Jt
sort(data, IMPROVED_QUICK); 16-1&WuY@
} r?%,#1|$$
private static String[] name={ !Bu=?gf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7X{@$>+S
}; ;659E_y>
M`D`-vv
private static Sort[] impl=new Sort[]{ w678
new InsertSort(), Q=u [j|0mc
new BubbleSort(), !QsmT3
new SelectionSort(), BbG=vy8'l
new ShellSort(), F9J9zs*,
new QuickSort(), j&l2n2z
new ImprovedQuickSort(), rd ]dDG
new MergeSort(), c:u2a/Q?
new ImprovedMergeSort(), \E8CC>Jd
new HeapSort() ./_4D}
}; |>v8yS5
A3A"^f$$
public static String toString(int algorithm){ t@cImmh\T
return name[algorithm-1]; Y;1J`oT
} BDcA_=^R&
umI6# Vd`=
public static void sort(int[] data, int algorithm) { ."h>I @MH
impl[algorithm-1].sort(data); Ey]P >J
} uuf+M-P
`7jdV
public static interface Sort { en8l:INX
public void sort(int[] data); n_S)9C'=
} - -ZSl
]cP$aixd
public static void swap(int[] data, int i, int j) { Ixr#zt$T-G
int temp = data; te b/
data = data[j]; BE,H`G #h
data[j] = temp; KFf6um
} j9O"!9$vQ
} ~Aoo\fN_U