[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; +UX~'t_'v
} &0bq3JGW
int i1=l; )hQ]>o@i{
int i2=mid+1; 3ww\Z8UeK
for(int cur=l;cur<=r;cur++){ i4k [#x
if(i1==mid+1) |1A0YjOD
data[cur]=temp[i2++]; (*6 .-Xn
else if(i2>r) Gukvd6-g9b
data[cur]=temp[i1++]; 1Vz^?t:
else if(temp[i1] data[cur]=temp[i1++]; EyU6^
else i={4rZOD^
data[cur]=temp[i2++]; oO3^9?Z
} V;CRs\aYf
} [$d]U.
W"vkmk
} k1yqerA
K$}K2w
改进后的归并排序: >cmz JS
7\yh(+kN
package org.rut.util.algorithm.support; wVI_SQ<8V
L..
import org.rut.util.algorithm.SortUtil; q&?hwX Z7
r 20!
/** <zTz/Hk`
* @author treeroot r|uR!=*|?
* @since 2006-2-2 XHKLl?-
* @version 1.0 >)*d/^
*/ BKI-Dh
public class ImprovedMergeSort implements SortUtil.Sort { tQT<1Q02i
1GkoE
private static final int THRESHOLD = 10; %rlqq*
V,c^Vqy
/* u^^jt(j
* (non-Javadoc) *>[q*SF
* d { P$}b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k^;/@:
*/ 'ta&qp
public void sort(int[] data) { #pW!(tfN^a
int[] temp=new int[data.length]; $}S0LZ_H
mergeSort(data,temp,0,data.length-1); <Tbl|9
} (yuOY/~k/
@~7au9.V=X
private void mergeSort(int[] data, int[] temp, int l, int r) { @QnKaZ8jW
int i, j, k; HL$7Ou
int mid = (l + r) / 2; >Q"3dw
if (l == r) ?kV_!2U)'K
return; v5?)J91
if ((mid - l) >= THRESHOLD) (Lj*FXmz
mergeSort(data, temp, l, mid); #7:ah
else W:wSM*
insertSort(data, l, mid - l + 1); ${ DSH
if ((r - mid) > THRESHOLD) n++ak\
mergeSort(data, temp, mid + 1, r); x+'Ea.^
else &IDT[J
insertSort(data, mid + 1, r - mid); `RURC"
{H9g&pfv
for (i = l; i <= mid; i++) { h;#^?v!+
temp = data; ?/@XJcm+
} t(.vX
for (j = 1; j <= r - mid; j++) { V5 9Vf[i|
temp[r - j + 1] = data[j + mid]; Ag(JSVY
} n >E1\($
int a = temp[l]; `W1TqA
int b = temp[r]; bng/v
for (i = l, j = r, k = l; k <= r; k++) { `8\"3S
if (a < b) { \>j@!W
data[k] = temp[i++]; |VyN>&r~6
a = temp; 0oi.k;
} else { wF6a*b@v
data[k] = temp[j--]; n1R{[\ >1
b = temp[j]; M[iWWCX
} HuSE6an
} O_ $zK
} r`+G9sj3U
s{Y-Vdx
/** 4QiV@#o:
* @param data g*4^HbVxt
* @param l w; f LnEz_
* @param i mv$gL
*/ 8r0;054
private void insertSort(int[] data, int start, int len) { L0%W;m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?AI`,*^
} =gd~rk9
} H:z<]Rc
} bi-z%!Z
} :F"NF
nU2w\(3|
堆排序： ^8?px&B y:
8KdcU[w]
package org.rut.util.algorithm.support; c47.,oTo
CX5>/
import org.rut.util.algorithm.SortUtil; A*]sN8
JRtDjZ4>
/** \y7\RV>>3b
* @author treeroot iWe'|Br
* @since 2006-2-2 ue!4By8T
* @version 1.0 N{Pa&/V
*/ ~sWXd~\
public class HeapSort implements SortUtil.Sort{ zrC1/%T
$TAsb>W!(
/* (non-Javadoc) /|v b)J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a72L%oJ
*/ =%[vHQ\%
public void sort(int[] data) { `w"ooK
MaxHeap h=new MaxHeap(); {~Q}{ha
h.init(data); 2jxh7\zE
for(int i=0;i h.remove(); jnFN{(VH
System.arraycopy(h.queue,1,data,0,data.length); UH5A;SrTqR
} z<cPy)F]"
ySlGqR1H
private static class MaxHeap{ 6\QsK96_
B6!ni@$M8X
void init(int[] data){ `Q>qmf_Fi
this.queue=new int[data.length+1]; ExOSHKU,e
for(int i=0;i queue[++size]=data; Z?eedVV@
fixUp(size); iYr*0:M
} ]==S?_.B3n
} {'?PGk%v
97}l`z;Z
private int size=0; .&KC2#4
uUv^]B 8GM
private int[] queue; +\cG{n*
t6%zfm
public int get() { ;s$ P?('
return queue[1]; 'H1k
} ^/$U(4
kNrd=s,-]D
public void remove() { '@5"p.
SortUtil.swap(queue,1,size--); CL!s #w1I\
fixDown(1); *Oh]I|?
} FaG&U
file://fixdown Yjx4H
private void fixDown(int k) { [ofZ1hB4
int j; S$GWY^5}{
while ((j = k << 1) <= size) { q9$K.=_5
if (j < size %26amp;%26amp; queue[j] j++; O F?o
if (queue[k]>queue[j]) file://不用交换 i6:O9Km
break; %hRH80W|
SortUtil.swap(queue,j,k); 0(^N
k = j; DC'L-]#<
} lMjeq.5nP
} XK@Ct eP"
private void fixUp(int k) { fvV5G,lD3h
while (k > 1) { [85tZr]
int j = k >> 1; TA"gU8YQ
if (queue[j]>queue[k]) zi+NQOhR
break; zm=|#f
SortUtil.swap(queue,j,k); }Y3*X:i7
k = j; j<d,7
} 3'tq`t:SQ
} %Lfy!]Ru
FOSC#W9E
} 4{D^ 4G
}^*m0`H
} "bvob G
FND+Ok&
SortUtil： )1Z @}o 9
PED5>90
package org.rut.util.algorithm; Xcci)",!
3 E!F8GZ
import org.rut.util.algorithm.support.BubbleSort; -)!;45
import org.rut.util.algorithm.support.HeapSort; $gaGaB
import org.rut.util.algorithm.support.ImprovedMergeSort; F<Z13]|
import org.rut.util.algorithm.support.ImprovedQuickSort; &MJ`rj[%
import org.rut.util.algorithm.support.InsertSort; cIXqnb
import org.rut.util.algorithm.support.MergeSort; D4U<Rn6N_5
import org.rut.util.algorithm.support.QuickSort; Lz`_&&6
import org.rut.util.algorithm.support.SelectionSort; /k=krAz.
import org.rut.util.algorithm.support.ShellSort; U{8x.CJ]
O7zj8
/** &nwk]+,0W#
* @author treeroot Qa,$_,E
* @since 2006-2-2 Ihx[S!:
* @version 1.0 6@=ipPCR
*/ zB#.EW
public class SortUtil { kntULI$`
public final static int INSERT = 1; .-.b:gdO(
public final static int BUBBLE = 2; Qsr+f~"W
public final static int SELECTION = 3; Ew&|!d
public final static int SHELL = 4; 7G 3e
public final static int QUICK = 5; GBGna3
public final static int IMPROVED_QUICK = 6; kC/An@J^#
public final static int MERGE = 7; N=c{@h
public final static int IMPROVED_MERGE = 8; PS`F
public final static int HEAP = 9; F)=*Ga
eVGW4b
public static void sort(int[] data) { He}"e&K
sort(data, IMPROVED_QUICK); 9PJnKzQ4
} <l$ vnq
private static String[] name={ D #C\| E:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Twpk@2=l
}; (4FZK7Fm
4+F@BxpB
private static Sort[] impl=new Sort[]{ C@@PLsMg
new InsertSort(), ;H"OZRQ
new BubbleSort(), 8,]wOxwqi
new SelectionSort(), qDjH^f
new ShellSort(), 4\14HcTcK
new QuickSort(), *!`bC@E
new ImprovedQuickSort(), R{{?wr6b$
new MergeSort(), #[y2nK3zF
new ImprovedMergeSort(), e J:#vX86
new HeapSort() 8n/[oDc]
}; r ['zp=9
)wk9(|[o
public static String toString(int algorithm){ 0MN)Z(Sa
return name[algorithm-1]; Gc<^b
} M0woJt[&
MG3xX;
public static void sort(int[] data, int algorithm) { 9&1$\ZH
impl[algorithm-1].sort(data); xhncQhf\
} gg$:U
>,nK
public static interface Sort { 1c:/c|shQ_
public void sort(int[] data); 2\G[U#~bi
} "2`/mtMon
|O[ I=!
public static void swap(int[] data, int i, int j) { 9zaSA,}
int temp = data; eyG[1EEU
data = data[j]; }XRRM:B|)(
data[j] = temp; ab*O7v
} {N@tJ,Fh{
} l/56;f\IA