[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; \yG`Sfu2
} 4>YU8/Rw
int i1=l; ]~8v^A7u
int i2=mid+1; U*qNix
for(int cur=l;cur<=r;cur++){ q & b5g !
if(i1==mid+1) TP{Gt.e
data[cur]=temp[i2++]; ;E#\
else if(i2>r) (z2Z)_6L*L
data[cur]=temp[i1++]; d=y0yq{L
else if(temp[i1] data[cur]=temp[i1++]; %[ /<+
else f>z`i\1oO
data[cur]=temp[i2++]; 5oJ Dux }
} ^dfx~C
} G?/c/rG
xr.XU'
} ~ezCu_
qm'b'!gq~
改进后的归并排序: B+Z13;}B
"yW&<7u1
package org.rut.util.algorithm.support; SX+4HJB
%$TEDr!
import org.rut.util.algorithm.SortUtil; q{E"pyt36R
` 8UWE {
/** x@m<Ym-
* @author treeroot j{;|g%5t
* @since 2006-2-2 VFSz-<L
* @version 1.0 5m7b\Mak
*/ QrC/ssf}
public class ImprovedMergeSort implements SortUtil.Sort { k_?~<vTM
*b"CPg/\
private static final int THRESHOLD = 10; ;'HF'Z
XsUUJuCG
/* Yj|]Uff8O
* (non-Javadoc) x2k*|=$
* Obo_YE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J>%t<xYf4
*/ aD ESr?
public void sort(int[] data) { Go <'
int[] temp=new int[data.length]; 7F(5)Utt
mergeSort(data,temp,0,data.length-1); V7C1FV2
} :6lwO%=F
gvyT-XI
private void mergeSort(int[] data, int[] temp, int l, int r) { >'`Sf ?+|
int i, j, k; j[XYj6*d
int mid = (l + r) / 2; %8w9E=
if (l == r) P+Z\3re
return; "- eZZEl(
if ((mid - l) >= THRESHOLD) w!`Umll2
mergeSort(data, temp, l, mid); iYKU[UP?
else [M:S`{SbY
insertSort(data, l, mid - l + 1); #mLuU
if ((r - mid) > THRESHOLD) ia4k:\
mergeSort(data, temp, mid + 1, r); ntGq" o
else })[($$f/
insertSort(data, mid + 1, r - mid); ]1sNmi$T
DZs^ 2Zc
for (i = l; i <= mid; i++) { i8~$o:&HT
temp = data; \H4U8)l
} ~HmxEk9
for (j = 1; j <= r - mid; j++) { O>V(cmqE`
temp[r - j + 1] = data[j + mid]; }Hy ~i
} XoItV
int a = temp[l]; VVuR+=.&
int b = temp[r]; i8~r
for (i = l, j = r, k = l; k <= r; k++) { JE!("]&
if (a < b) { IgM v =^U
data[k] = temp[i++]; yC !/PQ"
a = temp; -$YJfQE6G
} else { eko]H!Ov(
data[k] = temp[j--]; maC>LBa2/
b = temp[j]; >"("*3AO
} w`gyE 6A
} r,xmEj0E
} E>pVn2|
fbC~WV#
/** ;6m;M63z
* @param data .Yx_:h=u
* @param l ZL_[4Y
* @param i 6y Wc1
*/ #3MKH8k&~
private void insertSort(int[] data, int start, int len) { {TAw)!R~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \%5MAQS
} r]LCvsVa
} %8FN0
} ut&/\k=N
} 6 h'&6
;7rv
堆排序： 6G_<2bO
u7=T(4a
package org.rut.util.algorithm.support; YaL]>.;Z:"
k+1gQru{d
import org.rut.util.algorithm.SortUtil; t;47(U
#C*&R>IvY
/** ]ii+S"U3
* @author treeroot u) *Kws
* @since 2006-2-2 WRpyr
* @version 1.0 eVt1d2.O
*/ +K{LQsR]
public class HeapSort implements SortUtil.Sort{ K)[8 H~Lm
G/{ ~_&t
/* (non-Javadoc) 9%!dNnUk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V'StvU
*/ -MfQ&U
public void sort(int[] data) { z"379b7cN
MaxHeap h=new MaxHeap(); w>979g
h.init(data); ZK!A#Jm{
for(int i=0;i h.remove(); T20VX 8gX
System.arraycopy(h.queue,1,data,0,data.length); 7SS07$B
} YD&_^3-XM
KQmZ#W%2m
private static class MaxHeap{ N 8t=@~]
keCRvlZ4
void init(int[] data){ /fwgqFVk
this.queue=new int[data.length+1]; {exrwnIZj
for(int i=0;i queue[++size]=data; A';QuWdT
fixUp(size); {p/YCch,
} ]vo_gKZ
} Gr)-5qh
9_huI'"p
private int size=0; m{(+6-8|m
NP_?f%(
private int[] queue; K ,isjh2
`|Fp^gM
public int get() { :6Pad
return queue[1]; CL3xg)x6
} ;pZ[|
3QCVgo i\
public void remove() { q#[`KOPV
SortUtil.swap(queue,1,size--); PC/!9s0W
fixDown(1); ~UPZ<
} g.C5r]=+&
file://fixdown }5bM1h#z
private void fixDown(int k) { +nU.p/cK+\
int j; 3-x%wD.
while ((j = k << 1) <= size) { _T*AC.
if (j < size %26amp;%26amp; queue[j] j++; LP<<'(l`
if (queue[k]>queue[j]) file://不用交换 |t6~%6^8
break; 3,6Ox45
SortUtil.swap(queue,j,k); $H*/;`,\[
k = j; -=5)NH t
} .j?kEN?w
} 0I%: BT
private void fixUp(int k) { `ROG~0lN(
while (k > 1) { <avQR9'&
int j = k >> 1; 5H !y46z
if (queue[j]>queue[k]) Tr.hmGU
break; 5D' bJ6PO
SortUtil.swap(queue,j,k); '`l K'5;
k = j; &jf7k <^
} )=_ycf^MC
} Y&f\VNlT
_>_j\b
} @ 4UxRp6+
QLr9dnA
} PT]GJ<K/
4hAJ!7[A.
SortUtil： ZGz|m0b (
o`?zF+M0
package org.rut.util.algorithm; OJ3UE(,I=
sb.J bE8
import org.rut.util.algorithm.support.BubbleSort; AsxD}Nw[Z*
import org.rut.util.algorithm.support.HeapSort; oln<yyDs
import org.rut.util.algorithm.support.ImprovedMergeSort; 7%d8D>uw8
import org.rut.util.algorithm.support.ImprovedQuickSort; qX6D1X1_
import org.rut.util.algorithm.support.InsertSort; I%;Jpe
import org.rut.util.algorithm.support.MergeSort; \l,rpVv5m
import org.rut.util.algorithm.support.QuickSort; q7Es$zjX
import org.rut.util.algorithm.support.SelectionSort; _vl}*/=Hc
import org.rut.util.algorithm.support.ShellSort; 4JMiyiW&
/q1s;I
/** .-]R9KjR1J
* @author treeroot !I8f#'p
* @since 2006-2-2 .6.^G
* @version 1.0 P&=lV}f
*/ npH?4S-8G
public class SortUtil { aC^$*qN-)
public final static int INSERT = 1; ~5OL6Bi-q
public final static int BUBBLE = 2; ai-n z-;
public final static int SELECTION = 3; |jG~,{
public final static int SHELL = 4; 1oY^]OD]W
public final static int QUICK = 5; HW[L[&/
public final static int IMPROVED_QUICK = 6; *e{PxaF!C
public final static int MERGE = 7; tP(h9|[N
public final static int IMPROVED_MERGE = 8; bcz-$?]
public final static int HEAP = 9; ]?<n#=eW
Y83GKh,*
public static void sort(int[] data) { s&tE_
sort(data, IMPROVED_QUICK); qVgd(?hJ#
} h @/;`E[
private static String[] name={ 2qU&l|>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s~L</Xvo
}; 7P**:b
<$i4?)f(
private static Sort[] impl=new Sort[]{ 6mPm=I[oh
new InsertSort(), 4s.]M>Yb
new BubbleSort(), X.#oEmA,P
new SelectionSort(), NiSO'=y$n
new ShellSort(), Xe1P- 60
new QuickSort(), ^&[+H8$
new ImprovedQuickSort(), ")UwkF
new MergeSort(), ~[W#/kd1n
new ImprovedMergeSort(), s"~5']8
new HeapSort() PLR0#).n
}; &|o$=Ad
*l+Cl%e
public static String toString(int algorithm){ wpo1
return name[algorithm-1]; ^k/i-%k0
} !m y8AWO'
!xK=#pa
public static void sort(int[] data, int algorithm) { eSy(~Y
impl[algorithm-1].sort(data); 4na8
} x]4Kkpqm
+t!S'|C
public static interface Sort { 0kDBE3i#
public void sort(int[] data); R: Z_g!h
} 1~yZ T
#1/}3+=5B
public static void swap(int[] data, int i, int j) { f~h~5
int temp = data; Y`ihi,s`H
data = data[j]; "v]%3i.* -
data[j] = temp; D$r Uid
} l54 m22pfv
} vNDu9ovs-