[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; k ~6-cx
} ?)tK!'
int i1=l; #w3ru6*W
int i2=mid+1; VTe.M[:
for(int cur=l;cur<=r;cur++){ :X .,
if(i1==mid+1) nJ3vi}`
data[cur]=temp[i2++]; OKwOugi0
else if(i2>r) 0|)19LR
data[cur]=temp[i1++]; }WP-W
else if(temp[i1] data[cur]=temp[i1++]; |LYKc.xo
else I>w^2(y
data[cur]=temp[i2++]; 9Yw]Y5l
} >mIg@knE
} DacJ,in_I{
)@:l^$x
} jv}=&d
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改进后的归并排序: VfSGCe
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package org.rut.util.algorithm.support; ?9U:g(v
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import org.rut.util.algorithm.SortUtil; /BHepD}
Di??Q_$ak
/** /! ^P)yU,
* @author treeroot ~mILA->F
* @since 2006-2-2 _C+DBA
* @version 1.0 MguL$W&l
*/ aMCO"66b
public class ImprovedMergeSort implements SortUtil.Sort { j|'R$|
T+TF-] J
private static final int THRESHOLD = 10; <]#o*_aFP
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/* S=R3"~p
* (non-Javadoc) lpEDPvD_Vm
* dm^H5D/A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <lld*IH
*/ =l|>.\-
public void sort(int[] data) { <NQyP{p
int[] temp=new int[data.length]; {$TZ}z"DA
mergeSort(data,temp,0,data.length-1); E#h~V5Tf
} .Dv=pB,u
{^&k!H2
private void mergeSort(int[] data, int[] temp, int l, int r) { 5 ;vC(Go
int i, j, k; +Hyk'=.W
int mid = (l + r) / 2; e(\Q)re5Q
if (l == r) nu 7lh6o=
return; 0^\/ERK
if ((mid - l) >= THRESHOLD) QAaF@Do
mergeSort(data, temp, l, mid); ;6<zjV7}
else %aLCH\e
insertSort(data, l, mid - l + 1); :`<psvd
if ((r - mid) > THRESHOLD) 7s]Wq6
mergeSort(data, temp, mid + 1, r); L[]^{ O
else UA0tFeH
insertSort(data, mid + 1, r - mid); YmCbxYa7
4_< nQ9K
for (i = l; i <= mid; i++) { 4[l^0
temp = data; <$C<Ba?;?
} !1-&Y'+
for (j = 1; j <= r - mid; j++) { ?Y!^I2Y6
temp[r - j + 1] = data[j + mid]; 9}n,@@
} o4'v> b
int a = temp[l]; $n*%v85
int b = temp[r]; oWrE2U;
for (i = l, j = r, k = l; k <= r; k++) { 83?1<v0%
if (a < b) { X<K9L7/*
data[k] = temp[i++]; ^n71'MW
a = temp; <UAP~RH{
} else { QE6El'S
data[k] = temp[j--]; |B|@GF?:
b = temp[j]; pU DO7Q]
} r9;`
} 8|vld3;
} ruHrv"29
.WO/=#O
/** qhwoV4@f
* @param data kC|Tubs(
* @param l %LcH>sV
* @param i w@-b
*/ 0:PSt_33F
private void insertSort(int[] data, int start, int len) { w7ZG oh(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r:#Q9EA
} uri*lC
} l qXc
} Ge~,[If+
} |Pf(J;'[
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堆排序： M4H"].Zm
i?W]*V~ply
package org.rut.util.algorithm.support; .S6ji~;r
CjmV+%b4
import org.rut.util.algorithm.SortUtil; 8qmknJC
(7ijt
/** mLULd}g/o
* @author treeroot skK*OO2-
* @since 2006-2-2 Z{#"-UG
* @version 1.0 OT%V{hD
*/ Zr9d&|$
public class HeapSort implements SortUtil.Sort{ W1<.OO\J
a G@nErdW
/* (non-Javadoc) yYBNH1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A8mlw#`E8b
*/ p}f-c
public void sort(int[] data) { /o\U/I
MaxHeap h=new MaxHeap(); }"0{zrz
h.init(data); 7 {nl..`
for(int i=0;i h.remove(); y-<$bA[K~
System.arraycopy(h.queue,1,data,0,data.length); uNg'h/^NZ|
} Vbo5`+NAis
])S$x{.g
private static class MaxHeap{ /bi6>GaC:E
To">DOt
void init(int[] data){ P!9;} &
this.queue=new int[data.length+1]; $wgc vySx
for(int i=0;i queue[++size]=data; '6+Edu~Ho)
fixUp(size); j;G[%gi6{
} L2d:.&5
} "'~|}x1Uv
Ia'x]#~
private int size=0; O%prD}x
NA=#>f+U%
private int[] queue; x!`b'U\
A1=_nt)5
public int get() { =hPG_4#
return queue[1]; /Ht/F)&P
} x'zihDOI
0s)cVYppe
public void remove() { OWZS3Y+
SortUtil.swap(queue,1,size--); q;ZLaX\bFl
fixDown(1); d&5c_6oW
} xM%`KP.8X
file://fixdown .<HC[ls
private void fixDown(int k) { 487YaioB$
int j; g;l'VA3v
while ((j = k << 1) <= size) { "bPCOJ[v9
if (j < size %26amp;%26amp; queue[j] j++; XzW7eO,A
if (queue[k]>queue[j]) file://不用交换 .uBO
break; rAM*\=
SortUtil.swap(queue,j,k); u]P03B
k = j; hEWx.
} ENO? ;
} b~jIv:9T
private void fixUp(int k) { epn#qeX
while (k > 1) { !O 4<I_EY{
int j = k >> 1; >dyhox2*"
if (queue[j]>queue[k]) eN2dy-0
break; G l_\Vy
SortUtil.swap(queue,j,k); A*a7\id!y
k = j; "havi,m
} ob)Q,;8R
} D DQs42[
sw[oQ!f
} 9LH=3Qt
hHCzj*5
} <D~6v2$
V@$GC$;
SortUtil： tCX9:2c
-MDOZz\
package org.rut.util.algorithm; )@!~8<_"
;CA ?eI
import org.rut.util.algorithm.support.BubbleSort; #FEa 5
import org.rut.util.algorithm.support.HeapSort; UOw~rK
import org.rut.util.algorithm.support.ImprovedMergeSort; |3S'8OeCI
import org.rut.util.algorithm.support.ImprovedQuickSort; NvUu.
import org.rut.util.algorithm.support.InsertSort; ud yAP>
import org.rut.util.algorithm.support.MergeSort; ]{(l;k9=e
import org.rut.util.algorithm.support.QuickSort; m dC`W&r
import org.rut.util.algorithm.support.SelectionSort; qC\]"Z`m
import org.rut.util.algorithm.support.ShellSort; n"mJEkHE
T~s&)wD
/** {a]pF.^kf
* @author treeroot nDyvX1]
* @since 2006-2-2 =E&24
* @version 1.0 {5U1`>
*/ 'BqrJfv
public class SortUtil { 5.O-(eSa0&
public final static int INSERT = 1; l8er$8S}
public final static int BUBBLE = 2; 8oa)qaG1
public final static int SELECTION = 3; ZyHIMo|
public final static int SHELL = 4; /.7$`d
public final static int QUICK = 5; ,c@r` x
public final static int IMPROVED_QUICK = 6; cT_uJbP+
public final static int MERGE = 7; TP~( r
public final static int IMPROVED_MERGE = 8; *C5:#A0
public final static int HEAP = 9; T}V7SD.
-Uzc"Lx B
public static void sort(int[] data) { &1*4%N@'
sort(data, IMPROVED_QUICK); be&6kG
} h0T< :X
private static String[] name={ c=jcvDQ6W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NR;q`Xe-
}; 9cVn>Fb
Km[]^;6
private static Sort[] impl=new Sort[]{ Y=5!QLV4
new InsertSort(), ;:AG2zE!
new BubbleSort(), / c+,
new SelectionSort(), N{ : [/
new ShellSort(), #:]vUQ
new QuickSort(), xR0~S 3caI
new ImprovedQuickSort(), yEE|e&#>
new MergeSort(), hm*Th
new ImprovedMergeSort(), 2~#ZO?jE6
new HeapSort() ]&&I|K_
}; 8o!
)WaX2uDA?
public static String toString(int algorithm){ _u#/u2<
return name[algorithm-1]; :5r:I[FFy
} T^KCB\\<
2.^7?ok
public static void sort(int[] data, int algorithm) { qJsQb
impl[algorithm-1].sort(data); .Ql;(Wyl
} %T3j8fC{s
hCU)W1q#
public static interface Sort { p#ZMABlE,P
public void sort(int[] data); K.:6YXVs<
} lf?Z{^
TjKzBAX
public static void swap(int[] data, int i, int j) { [P.@1mV
int temp = data; g|tNa/
data = data[j]; 29R_n)ne
data[j] = temp; +#|'|}j
} ;6DR.2}?>
} M/n[&