[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; P0W*C6&71|
} iH/6M
int i1=l; jzDuE{
int i2=mid+1; d Vj_8>
for(int cur=l;cur<=r;cur++){ ;nodjbr,j
if(i1==mid+1) tKuVQH~D
data[cur]=temp[i2++]; ToJ$A`_!`
else if(i2>r) z.kvX+7'
data[cur]=temp[i1++]; (BTVD,G
else if(temp[i1] data[cur]=temp[i1++]; Y&S24aql
else #:[t^}
data[cur]=temp[i2++]; [<%H>S1
} bmfI~8
} ' 0J1vG~c
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} vhpNpgz
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改进后的归并排序: VHCK2}ps
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package org.rut.util.algorithm.support; |C!oxhu<
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import org.rut.util.algorithm.SortUtil; .!f$ \1l
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/** MUTj-1H6)
* @author treeroot iPd[l{85Z
* @since 2006-2-2 BQ=PW|[
* @version 1.0 g;2?F[8Th
*/ *M:B\D
public class ImprovedMergeSort implements SortUtil.Sort { n/SwP
F P* lQRA
private static final int THRESHOLD = 10; %kS(LlL+6
)(ImLbM)
/* 6^eV"&+@
* (non-Javadoc) 77\]B
* I aGq]z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LIcM3_.
*/ [R=yF ~-
public void sort(int[] data) { 3~uW I%I`
int[] temp=new int[data.length]; GT0Of~?f
mergeSort(data,temp,0,data.length-1); ldiD2 Q
} Fs9I7~L3
syaPpM Q-
private void mergeSort(int[] data, int[] temp, int l, int r) { nm6h%}xND<
int i, j, k; ~]nSSD)\
int mid = (l + r) / 2; f"%{%M$K
if (l == r) +y&Tf#.V/A
return; ]ooIrY8
if ((mid - l) >= THRESHOLD) )}"wesNo".
mergeSort(data, temp, l, mid); nQ5n-A&["
else R)QC)U
insertSort(data, l, mid - l + 1); .(^ ,z&
if ((r - mid) > THRESHOLD) f33l$pOp
mergeSort(data, temp, mid + 1, r); ] lrWgm
else ] Hztb
insertSort(data, mid + 1, r - mid); 2/"u5
IIn"=g=9
for (i = l; i <= mid; i++) { G/7cK\^u
temp = data; IOqwCD[
} xx#zN0I>-y
for (j = 1; j <= r - mid; j++) { `< xn8h9p
temp[r - j + 1] = data[j + mid]; "|qqUKJZ
} orWbU UC
int a = temp[l]; ;[M}MFc/`
int b = temp[r]; 7Rd'm'l)
for (i = l, j = r, k = l; k <= r; k++) { {bJ`~b9e
if (a < b) { 4nh>'v%pD
data[k] = temp[i++]; W g02 A\
a = temp; OmIg<v0\;
} else { ;c4gv,q@
data[k] = temp[j--]; *Zt#U#
b = temp[j]; uVJDne,R
} TU:7Df
} FVaQEMZ^
} P:k>aHnW
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/** C|}iCB
* @param data -"=U?>(
* @param l `f*Q$Ulqx
* @param i #a'Ex=%rM
*/ mi,E-
private void insertSort(int[] data, int start, int len) { P<M?Qd1.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $W!!wN=B
} kBD>-5Sn_T
} ihIVUu-M
} \=:~ki=@B
} )qo {c1X
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堆排序： __|+w<]
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package org.rut.util.algorithm.support; _qw?@478
#xX5,r0
import org.rut.util.algorithm.SortUtil; B0dQ@Hq*
hc>HQrd
/** <{V(.=11
* @author treeroot Mxyb5h
* @since 2006-2-2 glM$R&/
* @version 1.0 7UVzp v
*/ SYCEQ5 -
public class HeapSort implements SortUtil.Sort{ _B/dWA,P
>z%&xgOa
/* (non-Javadoc) f!I[>&n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) psg)*'r
*/ >8WP0Qx/
public void sort(int[] data) { ST:A<Da"
MaxHeap h=new MaxHeap(); IC1NKn<k
h.init(data); @~!wDDS
for(int i=0;i h.remove(); 8FKXSqhVM
System.arraycopy(h.queue,1,data,0,data.length); 5=v}W:^v.
} RS)tO0
$~VRza 8Q
private static class MaxHeap{ K 1 a\b"
lij.N)E
void init(int[] data){ 5ni~Q 9b
this.queue=new int[data.length+1]; T 6)bD&
for(int i=0;i queue[++size]=data; b{L/4bu
fixUp(size); r:f[mk"-"A
} S- pV_Ff
} K/i*w<aPb7
`6lr4Kk @R
private int size=0; V^3L3|k
r'^Hg/Jzt
private int[] queue; G,o6292hj
E"qRw_ ~t
public int get() { &cxRD
return queue[1]; QPx_-
} Pv_Jm
9N@W\DT
public void remove() { ,z;cbsV-{
SortUtil.swap(queue,1,size--); &O9 |#YUq
fixDown(1); H`1{_
} W+UfGk}A
file://fixdown 0ZZZoPo
private void fixDown(int k) { %E#s\B,w
int j; _ba>19csq%
while ((j = k << 1) <= size) { LhOa{1SY
if (j < size %26amp;%26amp; queue[j] j++; M+U9R@
if (queue[k]>queue[j]) file://不用交换 [@J/eWB
break; X-6de>=
SortUtil.swap(queue,j,k); $c0h.t
k = j; e+~\+:[?
} '*5i)^
} xF;kTBRi
private void fixUp(int k) { gp>3I!bo[K
while (k > 1) { C-Q28lD}f
int j = k >> 1; ,w{e
if (queue[j]>queue[k]) _I@9HC 4
break; (gP)%
SortUtil.swap(queue,j,k); c~z82iXNO
k = j; OGK}EI
} llcb~
} NW]Lj>0Y
AL9chYP}/
} )c8rz[i
s}w{:Hk,x8
} 1S{D6#bE
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SortUtil： T|nDTezr
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package org.rut.util.algorithm; OLyf8&AU@
rDm~h~u5
import org.rut.util.algorithm.support.BubbleSort; 3{'Ne}5%I
import org.rut.util.algorithm.support.HeapSort; X{5vXT\/y
import org.rut.util.algorithm.support.ImprovedMergeSort; '(U-(wTC'/
import org.rut.util.algorithm.support.ImprovedQuickSort; |iakz|])
import org.rut.util.algorithm.support.InsertSort; Ag9vU7
import org.rut.util.algorithm.support.MergeSort; 7j@Hs[ *
import org.rut.util.algorithm.support.QuickSort; t|g4m[kr
import org.rut.util.algorithm.support.SelectionSort; f(/lLgI(
import org.rut.util.algorithm.support.ShellSort; 6 Q%jA7
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/** Gr*r=s
* @author treeroot 6wBx;y |
* @since 2006-2-2 BmbyH{4
* @version 1.0 cqQ#p2<%
*/ o_XflzC
public class SortUtil { .c8g:WB<
public final static int INSERT = 1; k.uH~S_
public final static int BUBBLE = 2; SF7\<'4\N
public final static int SELECTION = 3; 3O,+=?VK
public final static int SHELL = 4; my(2;IJ#{
public final static int QUICK = 5; Ro\8ZXUQa
public final static int IMPROVED_QUICK = 6; {m4b(t`xw
public final static int MERGE = 7; |]jb& M
public final static int IMPROVED_MERGE = 8; ZInpMp
public final static int HEAP = 9; cS5Pl
,]|#[8
public static void sort(int[] data) { j'Gt&\4
sort(data, IMPROVED_QUICK); |,S+@"0#
} a!a-b~#cx
private static String[] name={ T-.%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bal$+S
}; GzhYY"iif#
kjIAep0rT
private static Sort[] impl=new Sort[]{ ^yWL,$
new InsertSort(), r(:5kC8K
new BubbleSort(), wo4;n9@I
new SelectionSort(), A 9( x
new ShellSort(), 3x`|
new QuickSort(), "un]Gc
new ImprovedQuickSort(), umjt]Gu[
new MergeSort(), }q_<_lQ
new ImprovedMergeSort(), ]] !VK
new HeapSort() ). <-X^@
}; qraSRK5
gH$ Mr
public static String toString(int algorithm){ _GV:HOBi
return name[algorithm-1]; zNs55e.rx
} xcd#&
S=MEG+Ad
public static void sort(int[] data, int algorithm) { ?:vv50
impl[algorithm-1].sort(data); RiDJ> 6S
} .CL[_;}
QA< Rhv,
public static interface Sort { Z/W:97M
public void sort(int[] data); x3hB5p$q
} .!Oo|m`V@
nL5cK:
public static void swap(int[] data, int i, int j) { CuFSeRe
int temp = data; UbXh,QEG*
data = data[j]; {&cJDqz5=
data[j] = temp; pV9IHs}
} &q3"g*q
} FEW14U'O