[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; QZYD;&iY&
} Nd%,V
int i1=l; .?@$Rd2@W
int i2=mid+1; E&7U |$
for(int cur=l;cur<=r;cur++){ [59_n{S 1
if(i1==mid+1) 5)AMl)
data[cur]=temp[i2++]; %f*8JUE16
else if(i2>r) jLM1~`&
data[cur]=temp[i1++]; Dc}-wnga
else if(temp[i1] data[cur]=temp[i1++]; a>ZV'~zTf
else r@%-S!$
data[cur]=temp[i2++]; */u_RJ
} ]wc'h>w
} zL+jlUkE
Gh>Rt=Qu%
} gC> A*~J;
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改进后的归并排序: p>Qzz`@e
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package org.rut.util.algorithm.support; 4`7N}$j#,
s%1O}X$c
import org.rut.util.algorithm.SortUtil; "fU=W|lY
4703\ HK
/** &l/2[>D%4
* @author treeroot &&nvv&a
* @since 2006-2-2 hV)D,oN3
* @version 1.0 J4;w9[a$
*/ g~rZ=
public class ImprovedMergeSort implements SortUtil.Sort { :54ik,l
9l]+rs+
private static final int THRESHOLD = 10; nxS|]
h-].?X,]Q
/* wzwEYZN(q
* (non-Javadoc) cGIxE[n'
* @4#q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J NPEyC
*/ 6k|o<`~,
public void sort(int[] data) { N^*%{[<5
int[] temp=new int[data.length]; 7;2j^qPr
mergeSort(data,temp,0,data.length-1); yT.h[yv"w
} o:W>7~$jr=
V|13%aE_v
private void mergeSort(int[] data, int[] temp, int l, int r) { G3 rTzMO
int i, j, k; YC8wo1;Y!
int mid = (l + r) / 2; 3"NO"+Q
if (l == r) ZX'q-JUv f
return; >-*rtiE
if ((mid - l) >= THRESHOLD) 7l/.fSW
mergeSort(data, temp, l, mid); jhgS@g=@ZC
else iyKAw
insertSort(data, l, mid - l + 1); 6!*be|<&
if ((r - mid) > THRESHOLD) IW?).%F
mergeSort(data, temp, mid + 1, r); U5\^[~vW
else DvB!-|ek
insertSort(data, mid + 1, r - mid); ^~9fQJNs
2Tec#eYe
for (i = l; i <= mid; i++) { L-? ?%_=
temp = data; _2xNio&
} -K eoq
for (j = 1; j <= r - mid; j++) { Kkcb'aDR
temp[r - j + 1] = data[j + mid]; m!Cvd9X=
} 2FU+o\1%
int a = temp[l]; 1LYz X;H1
int b = temp[r]; Y3=5J\d!a
for (i = l, j = r, k = l; k <= r; k++) { n("Xa#mY[
if (a < b) { Iv+JEuIi
data[k] = temp[i++]; ,h,OUo]LIY
a = temp; /Jj7+?
} else { l25_J.e
data[k] = temp[j--]; kw{dvE\K
b = temp[j]; >HNBTc=~t
} Ne#FBRu5
} )eIC5>#.
} `@TWZ%f6
d9e_slx
/** Q]$gw,H"6
* @param data v3O+ ;4
* @param l =1sGT;>
* @param i fIe';a
*/ -:cBVu-m
private void insertSort(int[] data, int start, int len) { `yF6-F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .j^tFvN~L
} iZY4+ X
} (+uM |a
} PkX4 !
} |ecK~+
0,~||H{
堆排序： kb3>q($
+q n[F70}
package org.rut.util.algorithm.support; Cm@rXA/
3r^Ls[ey
import org.rut.util.algorithm.SortUtil; S!WG|75B
#O 2g]YH
/** bpP-wA^Hd
* @author treeroot C2t]
* @since 2006-2-2 X})5XYvA*
* @version 1.0 ^Gi9&fS,
*/ [l44,!Z&
public class HeapSort implements SortUtil.Sort{ E$SYXe[,
2_T2?weD5
/* (non-Javadoc) Ig&H0S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WbJ|]}hJ\
*/ pPL)!=o!
public void sort(int[] data) { abMB-
MaxHeap h=new MaxHeap(); @}; vl
h.init(data); \ SCi\j/a(
for(int i=0;i h.remove(); '3<T~t
System.arraycopy(h.queue,1,data,0,data.length); Z9wKjxu+
} Fi+8|/5
^AhV1rBB
private static class MaxHeap{ ~:FF"T>
(A(j.[4a
void init(int[] data){ s.|OdC>U =
this.queue=new int[data.length+1]; ly[j=vBV
for(int i=0;i queue[++size]=data; ^_\S)P2c
fixUp(size); =hRo#]{(K
} %_Q+@9
} Ec/&?|$
.*}!XKp0j
private int size=0; ^?M# |>
)[b\wrc
private int[] queue; :2t0//@X
='A VI-go5
public int get() { <+y%k~("
return queue[1]; "m#17J_
} m^!Kthq
0<i8 ;2KD
public void remove() { i?wEd!=w
SortUtil.swap(queue,1,size--); T.(C`/VM
fixDown(1); A_e&#O
} G&Fe2&5!w
file://fixdown e"#QUc(
private void fixDown(int k) { niA>afo
int j; ($nQmr;t
while ((j = k << 1) <= size) { a = *'
if (j < size %26amp;%26amp; queue[j] j++; Ztl?*zL
if (queue[k]>queue[j]) file://不用交换 'm=TBNQTS
break; V8nz@
SortUtil.swap(queue,j,k); CdZ. T/x
k = j; m!5MGq~
} 7Pe<0K)s(
} !zVjbYWY
private void fixUp(int k) { $UD$NSl
while (k > 1) { ^'%Q>FVb
int j = k >> 1; @.&KRAZ
if (queue[j]>queue[k]) shgZru
break; ; ,Nvg6c
SortUtil.swap(queue,j,k); A)#w~X4
k = j; Sw.k,p*r
} !C(U9p. 0
} ^jbjHI&
F/SYmNp
} R ;k1(p
VUon>XQ G
} VTUSM{TC
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SortUtil： R XN0v@V
7}1Z7"?
package org.rut.util.algorithm; Tnv,$KOhs
lY&Sx{-
import org.rut.util.algorithm.support.BubbleSort; '4Drs}j5
import org.rut.util.algorithm.support.HeapSort; P3!JA)p6a
import org.rut.util.algorithm.support.ImprovedMergeSort; `pb=y}
import org.rut.util.algorithm.support.ImprovedQuickSort; D\^mh{q(
import org.rut.util.algorithm.support.InsertSort; 5BJn_<
import org.rut.util.algorithm.support.MergeSort; U?%T~!
import org.rut.util.algorithm.support.QuickSort; z"nMR_TTu
import org.rut.util.algorithm.support.SelectionSort; iNs@8<=$T
import org.rut.util.algorithm.support.ShellSort; VS\| f'E
cG"wj$'w
/** *(s0X[-
* @author treeroot 00B,1Q HP
* @since 2006-2-2 82)%`$yZw[
* @version 1.0 *ESi~7;#
*/ ]GT+UX
public class SortUtil { >*/:"!u
public final static int INSERT = 1; }Ug$d>\
public final static int BUBBLE = 2; +~>cAWZq_
public final static int SELECTION = 3; G#Kw6
public final static int SHELL = 4; j.!5&^;u4
public final static int QUICK = 5; SoWMP2/
public final static int IMPROVED_QUICK = 6; n-9a0_{k
public final static int MERGE = 7; uZTbJ3$$
public final static int IMPROVED_MERGE = 8; 2KlVj]!7
public final static int HEAP = 9; <(t{C8>g%
mlYkn
public static void sort(int[] data) { \sAkKPI
sort(data, IMPROVED_QUICK); d]USk&8
} "S+AkLe(
private static String[] name={ X$Shi *U[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N\"Hf=Y(~
}; mBxMDnh
=Fc}T%
private static Sort[] impl=new Sort[]{ q[Tl#*P?y
new InsertSort(), cQ;@z2\
new BubbleSort(), -_xTs(;|8
new SelectionSort(), SP\s{,'F-b
new ShellSort(), ;VzdlCZ@
new QuickSort(), wh#IQ.E-
new ImprovedQuickSort(), I<Cm$8O?
new MergeSort(), U2r[.Ru
new ImprovedMergeSort(), O1@3V/.Wu
new HeapSort() riF-9 %i
}; PWeWz(]0Z4
j u&v4]
public static String toString(int algorithm){ t33\f<e
return name[algorithm-1]; n%;4Fm?
} s{OV-H
`z`=!1
public static void sort(int[] data, int algorithm) { `,O"^zR)z
impl[algorithm-1].sort(data); %ikPz~(
} ~|[i64V<^
![!,i\x
public static interface Sort { Q,M,^_
public void sort(int[] data); r0wAh/J|
} 8`s*+.LI!
_%3p&1ld
public static void swap(int[] data, int i, int j) { XqU0AbQ
int temp = data; FJqg,
data = data[j]; Sz:PeUr9h
data[j] = temp; EL%Pv1
} j<QK1d17
} pHowioFx