[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; q^u6f?B
} %{=4Fa(Jux
int i1=l; -fhAtxkg
int i2=mid+1; _dz+2au
for(int cur=l;cur<=r;cur++){ fHW-Je7mG
if(i1==mid+1) rK*hTjVn
data[cur]=temp[i2++]; a\.//?
else if(i2>r) (=6P]~,
data[cur]=temp[i1++]; g2!0vB>
else if(temp[i1] data[cur]=temp[i1++]; bbM4A! N
else Cl%V^xTb
data[cur]=temp[i2++]; UU*0dSWr
} >9<_s ^_
} k0gJ('zah
Bb$S^F(Xq
} F%w\D9+P
,P;8 }yQ
改进后的归并排序: r[Zg 2
R:SIs\%o
package org.rut.util.algorithm.support; 1x^W'n,HtK
Ky=(urAd
import org.rut.util.algorithm.SortUtil; E!r4AjaC
O@G<B8U,K
/** :-W$PIBe
* @author treeroot *g}vT8w'}
* @since 2006-2-2 [~zE,!
* @version 1.0 s0x@ u
*/ M'pY-/.
public class ImprovedMergeSort implements SortUtil.Sort { @^w!% ?J
R4hav
private static final int THRESHOLD = 10; !pE>O-| K
eh8<?(eK
/* nS?S6G5h
* (non-Javadoc) %Z-TbOX
* s?1-$|*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &utS\-;G
*/ ua6*zop
public void sort(int[] data) { n^g-`
int[] temp=new int[data.length]; ~:'gvR;x
mergeSort(data,temp,0,data.length-1); %3#b6m~
} >2!^ dT^D
s.k`];wo
private void mergeSort(int[] data, int[] temp, int l, int r) { P,s)2s'nZ
int i, j, k; %'K+$
int mid = (l + r) / 2; gK]T}
if (l == r) &q"uy:Rd
return; rzc 3k~@
if ((mid - l) >= THRESHOLD) '6Rs0__
mergeSort(data, temp, l, mid); ,cl"1>lp
else b*$o[wO9
insertSort(data, l, mid - l + 1); z^SN#v$
if ((r - mid) > THRESHOLD) O~c+$(
mergeSort(data, temp, mid + 1, r); (RI>aDGRH
else r&LCoe'\{i
insertSort(data, mid + 1, r - mid); P^o"PKA
|iF1A
for (i = l; i <= mid; i++) { t's5~
temp = data; \dQ2[Ek
} 'h+4zvI"8
for (j = 1; j <= r - mid; j++) { *1;L,*J"|
temp[r - j + 1] = data[j + mid]; fitK2d
} v@<lEG#$"|
int a = temp[l]; 's%ct}y\J
int b = temp[r]; o 2$<>1^
for (i = l, j = r, k = l; k <= r; k++) { 8?]%Qi
if (a < b) { LXOF{FG
data[k] = temp[i++]; kB!M[[t
a = temp; 5,I*F9[3
} else { '!2
data[k] = temp[j--]; :5qqu{GL
b = temp[j]; b~N|DKj
} vzgudxG'z
} CH|g
} .(.G`aKnF
34&$_0zn
/** TBLk+AR
* @param data I "+|cFq.
* @param l @a{v>)
* @param i ::h02,y;1%
*/ ,_7tRkn
private void insertSort(int[] data, int start, int len) { +[go7A$5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Et[QcB3
} qy0_1xT-
} ob()+p.kK
} P+h<{%:*
} iH -x
(]# JpQ
堆排序： g\mrRZ/?
8`R}L
package org.rut.util.algorithm.support; fCo2".Tk
OEqe^``!
import org.rut.util.algorithm.SortUtil; Vu8-Cy>Q?
&-.eu
/** ri_6wbPp
* @author treeroot MjeI?k}LJ
* @since 2006-2-2 ^i,0n}>
* @version 1.0 )^a#Xn3z
*/ [,V92-s;N
public class HeapSort implements SortUtil.Sort{ _-2n3py
DT~y^h
/* (non-Javadoc) _O71r}4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y8 u)Q
*/ Z`Eb L
public void sort(int[] data) { Rhxm)5+
MaxHeap h=new MaxHeap(); i /U{dzZ
h.init(data); Bd]DhPhJ
for(int i=0;i h.remove(); ^oZs&+z
System.arraycopy(h.queue,1,data,0,data.length); 9YsO+7[
} `e69kBAm
~5?n&pF
private static class MaxHeap{ z.F+$6
PL2Q!i`[o
void init(int[] data){ * =N6_
this.queue=new int[data.length+1]; YQd&rkr
for(int i=0;i queue[++size]=data; A>,fG9pR
fixUp(size); ,,-3p#Pbw
} [t\Mu}b
} m<HjL
NjMLq|X
private int size=0; -5*;J&.
X-^Oz@.>
private int[] queue; xqZ%c/I3q
qMj e,Y
public int get() { 43]&SXprH
return queue[1]; #SUq.A
} O&RHCR-\
@WE$%dr
public void remove() { /JYi^rZ
SortUtil.swap(queue,1,size--); /{} ]Hu
fixDown(1); U}h |Zk
} _!Q\Xn
file://fixdown gVWLY;c 3}
private void fixDown(int k) { U9OF0=g
int j; pAL-Pl9z
while ((j = k << 1) <= size) { FCAu%lvZT
if (j < size %26amp;%26amp; queue[j] j++; N%i<DsK.u6
if (queue[k]>queue[j]) file://不用交换 No+zw%l0E
break; =l_"M
SortUtil.swap(queue,j,k); O&%T_Zk@@
k = j; jC7XdYp
} tq93 2M4
} 5qko`r@#
private void fixUp(int k) { PUo&>
while (k > 1) { 6g&nnA
int j = k >> 1; 4x>e7Kf
if (queue[j]>queue[k]) ~+ur*3X
break; hidweg*7
SortUtil.swap(queue,j,k); arrcHf4O
k = j; 7 4UE-H)
} nwVtfsb
} ?Fw/c0
#$QY[rf=6
} r}bKVne
ShxX[k
} ;I'["k%
rKq]zHgpo
SortUtil： dy'?@Lj;
_FgeE`X
package org.rut.util.algorithm; .? /J
i{0_}"B
import org.rut.util.algorithm.support.BubbleSort; omu&:) g
import org.rut.util.algorithm.support.HeapSort; W=:+f)D
import org.rut.util.algorithm.support.ImprovedMergeSort; 64@s|m*
import org.rut.util.algorithm.support.ImprovedQuickSort; c^%k1pae(
import org.rut.util.algorithm.support.InsertSort; >kT~X ,o
import org.rut.util.algorithm.support.MergeSort; [5-5tipvWp
import org.rut.util.algorithm.support.QuickSort; b*i+uV?
import org.rut.util.algorithm.support.SelectionSort; rG6/h'!|
import org.rut.util.algorithm.support.ShellSort; MN4}y5
`}l%Am
/** v2Y=vr
* @author treeroot B*7o\~5
* @since 2006-2-2 xOlkG*3c
* @version 1.0 |Rc#Q<Vh|
*/ PHkvt!uH
public class SortUtil { 5[k35c{
public final static int INSERT = 1; )ej8vm
public final static int BUBBLE = 2; xh$[E&2u
public final static int SELECTION = 3; w.\:I[
public final static int SHELL = 4; o-_a0j
public final static int QUICK = 5; fz*6 B NJ
public final static int IMPROVED_QUICK = 6; hv6>3gbr
public final static int MERGE = 7; 8*X8U:.0o
public final static int IMPROVED_MERGE = 8; %qMk&1
public final static int HEAP = 9; ;Xns9
J4<*KL~a
public static void sort(int[] data) { ]Az >W*Y
sort(data, IMPROVED_QUICK); `4MPXfoBL
} Y9N:%[ :>W
private static String[] name={ 9^n ]qg^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t@\0$V \X
}; cl:YN]BK
OB%y'mo7]
private static Sort[] impl=new Sort[]{ ?(z3/"g]
new InsertSort(), U\N`[k.F
new BubbleSort(), ?QgWW
new SelectionSort(), o,L!F`W
new ShellSort(), '@FKgy;B)-
new QuickSort(), ZyG528O22
new ImprovedQuickSort(), IaB A2
new MergeSort(), O;~1M3Ii
new ImprovedMergeSort(), 1<*-,f
new HeapSort() DIY WFVh
}; N^)OlH
GZ"O%:d
public static String toString(int algorithm){ X!m/I i$q
return name[algorithm-1]; 4D8q Gti
} ;]gph)2cd
+J2=\YO
public static void sort(int[] data, int algorithm) { VH/_0
impl[algorithm-1].sort(data); lH[N*9G(
} WE3l*7<@
vCJjZ%eO%D
public static interface Sort { ^U52 *6
public void sort(int[] data); U;_;_
} p8Pvctc
Gh j[nsoC~
public static void swap(int[] data, int i, int j) { B,676~I
int temp = data; MDRSI g
data = data[j]; d(tq;2-
data[j] = temp; hod|o1C&
} q o'1Pknz
} -C\m'T,1