[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; R7y-#?
} `jt(DKB+J
int i1=l; zh?xIpY
int i2=mid+1; o<Ke3?J\
for(int cur=l;cur<=r;cur++){ m}sh I8S
if(i1==mid+1) +._f.BRmX.
data[cur]=temp[i2++]; _qdWQFuM
else if(i2>r) ^O?l9(=/u
data[cur]=temp[i1++]; Z7ZWf'o
else if(temp[i1] data[cur]=temp[i1++]; yzODF>KJ
else : ,|=Q}
data[cur]=temp[i2++]; qrOB_Nz
} ([E#zrz%
} ',<{X(#(
P[r}(@0rJ
} A89Y;_4y
E%KC'TN^D
改进后的归并排序: 1"N/ZKF-x
oTZo[T@zRx
package org.rut.util.algorithm.support; hlt9x.e.A
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import org.rut.util.algorithm.SortUtil; BD<rQmfA^
#zh6=.,7
/** GXGN;,7EV
* @author treeroot dICnB:SSB
* @since 2006-2-2 :ga 9Db9P
* @version 1.0 9iiU,}M`j
*/ 8Fyc#Xo8
public class ImprovedMergeSort implements SortUtil.Sort { |v,}%UN2
$v2S;UB v*
private static final int THRESHOLD = 10; 99=[>Ck)G
\Or]5ogT'
/* kjQIagw
* (non-Javadoc) })Ix.!p
* eU<]h>2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w/)e2CH
*/ 2*b#+b
public void sort(int[] data) { !^rITiy
int[] temp=new int[data.length]; sf=%l10Fk#
mergeSort(data,temp,0,data.length-1); .CB"@.7
} LD7? .
O p!
private void mergeSort(int[] data, int[] temp, int l, int r) { -sruxF
int i, j, k; _S[Rvb1e
int mid = (l + r) / 2; +^o3}`
if (l == r) 50O7=
return; +sV#Z,
if ((mid - l) >= THRESHOLD) 4'7 v!I9
mergeSort(data, temp, l, mid); #w[q.+A
else 7cJO)cm0'
insertSort(data, l, mid - l + 1); C"V?yDy2~
if ((r - mid) > THRESHOLD) X}ey0)g%
mergeSort(data, temp, mid + 1, r); loAfFK>g
else (dw3'W
insertSort(data, mid + 1, r - mid); OoA5!HEh
?}!gLp
for (i = l; i <= mid; i++) { 5G dY7t_1
temp = data; t\E-6u
} Iltg0`
for (j = 1; j <= r - mid; j++) { F5om-tzy
temp[r - j + 1] = data[j + mid]; 4@ydK
} rZwf%}
int a = temp[l]; 4rGO8R
int b = temp[r]; 4OB~h]Vc
for (i = l, j = r, k = l; k <= r; k++) { y"%iD`{
if (a < b) { QmDhZ04f
data[k] = temp[i++]; Z:r$;`K/
a = temp; oqQ?2k<@
} else { 3<Pyr-z h
data[k] = temp[j--]; bRY4yT
b = temp[j]; ^+Y-=2u:
} EusfgU:
} ),W(TL
} .jrR4@
9, sCJ5bb"
/** d[qEP6B
* @param data %s&E-*X
* @param l &,6y(-
* @param i t8a@L(J$
*/ %^)JaEUC
private void insertSort(int[] data, int start, int len) { nOL 25Y:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fTi{oY,zTg
} OGD8QD
} Y~\`0?ST
} K[3D{=
} V"D<)VVA
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堆排序： ?Pok-90
_sCJ3ZJ
package org.rut.util.algorithm.support; Wtzj;GJj
$=S'#^Z
import org.rut.util.algorithm.SortUtil; #xJGuYdv
R)DNFc:
/** 8 MACbLY
* @author treeroot CzDR%vx
* @since 2006-2-2 V+@%(x@D_
* @version 1.0 6=`m
*/ kxKnmB#m-
public class HeapSort implements SortUtil.Sort{ 3T.M?UG>
olQ8s*
/* (non-Javadoc) AD4L`0D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6@Z'fT4
*/ OKLggim{
public void sort(int[] data) { j@_) F^12
MaxHeap h=new MaxHeap(); W;)FNP|MT
h.init(data); E]U3O>hf
for(int i=0;i h.remove(); r>:7${pF
System.arraycopy(h.queue,1,data,0,data.length); M&BM,~
} ~jCpL@rS
8BoT%kVeJv
private static class MaxHeap{ 6XxG1]84
&j~|3
void init(int[] data){ .]sIoB-54
this.queue=new int[data.length+1]; \i;~~;D
for(int i=0;i queue[++size]=data; E[htB><
fixUp(size); %?9r(&
} R4rm>zisVX
} O|7{%5h
Ns(L1'9=
private int size=0; &4Iqm(
,mBKya)
private int[] queue; h/+I-],RF
_XO)`D~
public int get() { Cx3m\ \c
return queue[1]; YO!7D5rV#
} ^TCJh^4na
j[=_1~u}
public void remove() { y:6'&`L
SortUtil.swap(queue,1,size--); _)Z7Le:f!
fixDown(1); 1b]PCNz
} qer'V
file://fixdown .0*CT:1=0
private void fixDown(int k) { GPqB\bxb'
int j; :,z3:PL
while ((j = k << 1) <= size) { {uQ)p=
if (j < size %26amp;%26amp; queue[j] j++; _I}L$
if (queue[k]>queue[j]) file://不用交换 gBiQIhz
break; r(2'0JQ
SortUtil.swap(queue,j,k); [#*?uu+ jK
k = j; V1fvQ=9
} ?e|:6a+[f
} '?>O
private void fixUp(int k) { LU IT=+
while (k > 1) { R&|)y:bg|
int j = k >> 1; u$@I/q,ou
if (queue[j]>queue[k]) g!)LhE
break; Kac j
SortUtil.swap(queue,j,k); kpreTeA]
k = j; `6/Yf@b
} SUi1*S
} wj:3
R{Kd%Y:2Y
} 3L%r_N*a
FC-*?
} po$ynp756
4l!Yop0h
SortUtil： ![D,8]GD
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package org.rut.util.algorithm; ]!J3?G
EKS<s82hF&
import org.rut.util.algorithm.support.BubbleSort; ~TK^aM
import org.rut.util.algorithm.support.HeapSort; l:Xf(TLa
import org.rut.util.algorithm.support.ImprovedMergeSort; <Ibr.L]
import org.rut.util.algorithm.support.ImprovedQuickSort; ht)*Ync
import org.rut.util.algorithm.support.InsertSort; ~aR='\<
import org.rut.util.algorithm.support.MergeSort; ysT!^-&p
import org.rut.util.algorithm.support.QuickSort; c:_i)":
import org.rut.util.algorithm.support.SelectionSort; yc4f\0B/
import org.rut.util.algorithm.support.ShellSort; 3!w>"h0(
@`+$d=rO`
/** gsq[ 9
* @author treeroot f(MHU
* @since 2006-2-2 LOG*K;v3
* @version 1.0 VGUDUM.8
*/ 714nUA872
public class SortUtil { y^|3]G3
public final static int INSERT = 1; j%y+W{Q[
public final static int BUBBLE = 2; l )V43
public final static int SELECTION = 3; KXbYv62
public final static int SHELL = 4; f I-"8f0_
public final static int QUICK = 5; F$yFR
public final static int IMPROVED_QUICK = 6; h \cK
public final static int MERGE = 7; 0BP~0z
public final static int IMPROVED_MERGE = 8; ao5yW;^y
public final static int HEAP = 9; ^V,/4u
E6-(q!"A
public static void sort(int[] data) { ?,e:c XhE2
sort(data, IMPROVED_QUICK); Bv]wHPun
} Y},GZ^zqy
private static String[] name={ G`lhvpifG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xdU pp~}+.
}; _$_CR\$
FT<*
private static Sort[] impl=new Sort[]{ z>g& ?vo2
new InsertSort(), Ywk[VD+.
new BubbleSort(), 5*za]
new SelectionSort(), c(g^*8Pb
new ShellSort(), @O0vh$3t0
new QuickSort(), Nv]/L+i
new ImprovedQuickSort(), Hwc8i"{9y\
new MergeSort(), QNa3S*
new ImprovedMergeSort(), g UAPjR
new HeapSort() qa`(,iN
}; "EkO>M/fr
>5:e1a?9
public static String toString(int algorithm){ `a-T95IFy
return name[algorithm-1]; 'n.9qxY;
} $=SYssg7La
^M5uLm-_s
public static void sort(int[] data, int algorithm) { "8TMAF|i4
impl[algorithm-1].sort(data); rL/7wa
} He;%6OG{
]H'82a
public static interface Sort { *G|]5
public void sort(int[] data); l8lR5<
} \gv x)S11
?o'arxCxZn
public static void swap(int[] data, int i, int j) { %= ;K>D
int temp = data; :@A;!'zpL
data = data[j]; OWfj<#}t+
data[j] = temp; `;2`H, G'
} Xn'>k[}<k
} k8>^dZub