[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; =<(6yu_
} `v(!IBP|
int i1=l; :zIB3nT^
int i2=mid+1; JC$_Pg!
for(int cur=l;cur<=r;cur++){ g]MgT-C|
if(i1==mid+1) |LZ+_
data[cur]=temp[i2++]; G a$2o6
else if(i2>r) @~=d4Wj6
data[cur]=temp[i1++]; FS)C<T]t
else if(temp[i1] data[cur]=temp[i1++]; 'SE5sB
else &-IkM%_A9
data[cur]=temp[i2++]; S_AN.8T
} B;iJ$gt]
} phA{jJy?
OS(Ua
} w?fq%-6f*
R%t6sbsNv
改进后的归并排序: R SWw4}
YuO!Y9iEm
package org.rut.util.algorithm.support; [ x.]
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import org.rut.util.algorithm.SortUtil; A]'XC"lS
.db:mSrL
/** 2S@Cj{R(
* @author treeroot nYC S %\"
* @since 2006-2-2 ?:vB_@
* @version 1.0 {^:i}4ZRl
*/ ^5!"[RB\
public class ImprovedMergeSort implements SortUtil.Sort { ?*q-u9s9
rV%;d[LB
private static final int THRESHOLD = 10; ki`ur%h
'./qBJ
/* $Vs5d=B
* (non-Javadoc) 8v^AVg
* N#Nc{WU'B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?$\sMkn
*/ PEtr8J$uB
public void sort(int[] data) { 5}9rpN{y
int[] temp=new int[data.length]; <pT1p4T<
mergeSort(data,temp,0,data.length-1); Y!u">M#@
} dqt}:^L*0g
zLS?:yq
private void mergeSort(int[] data, int[] temp, int l, int r) { zU|'IW&
int i, j, k; {oo(HD;5
int mid = (l + r) / 2; iqd7
if (l == r) 2mthUq9b*
return; h5E<wyd96.
if ((mid - l) >= THRESHOLD) caTKi8
mergeSort(data, temp, l, mid); ?|<p^:
else \rbvlO?}
insertSort(data, l, mid - l + 1); 8Sf}z@~]
if ((r - mid) > THRESHOLD) ~fpk`&nhe
mergeSort(data, temp, mid + 1, r); aHles5
else sPX~>8}|VP
insertSort(data, mid + 1, r - mid); 'A/{7*,
Co<F<eXe
for (i = l; i <= mid; i++) { B]#iZ,Tp
temp = data; #@M'*X_%}K
} Ao9=TC'v$'
for (j = 1; j <= r - mid; j++) { riglEA[^
temp[r - j + 1] = data[j + mid]; FePWr7Ze
} RDqQ6(e"
int a = temp[l]; :WSszak
int b = temp[r]; OOz;/kay
for (i = l, j = r, k = l; k <= r; k++) { y<8o!=Tb5
if (a < b) { @A%\;oo
data[k] = temp[i++]; #@uF?8u
a = temp; %SMP)4Y/R
} else { 59_VC('
data[k] = temp[j--]; b~rlh=(o#_
b = temp[j]; Eo<N
} @7Nc*-SM
} 'yAHB* rQR
} a/q8vP
+\B.3%\-
/** +227SPLd
* @param data !?{%9
* @param l C #@5:$
* @param i S)@) @3
*/ _~b]/]|z#N
private void insertSort(int[] data, int start, int len) { OimqP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (Vy`u)gG
} tjDCfJx*
} w}(Ht_6q{
} }~NWOJ3;
} {0} Q5
JZrZDW>M
堆排序： B}h8c
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package org.rut.util.algorithm.support; .t%`"C
^ G>/;mZ
import org.rut.util.algorithm.SortUtil; =/^{Pn
FPuF1@K
/** j2!^iGS}
* @author treeroot z]Mu8
* @since 2006-2-2 6Y=MW{=F
* @version 1.0 `SESj)W(y
*/ 6:Zd,N=
public class HeapSort implements SortUtil.Sort{ l$!g#?w
^: V6=
/* (non-Javadoc) (qy82F-|2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x4S0C[k
*/ l`<u\],
public void sort(int[] data) { 0o&c8?@j
MaxHeap h=new MaxHeap(); - z"D_5
h.init(data); l*4_
for(int i=0;i h.remove(); D5fhOq+g
System.arraycopy(h.queue,1,data,0,data.length); i<uk}
} P*8DM3':
)@.6u9\
private static class MaxHeap{ UYOR@x #
lJXihr
void init(int[] data){ <nT).S>+
this.queue=new int[data.length+1]; x5nw/''[2
for(int i=0;i queue[++size]=data; f5|Ew&1EP
fixUp(size); 1ml{oqNj
} vWpkU<&3|
} A/U,|
Z^vcODeC$
private int size=0; iN@+,]Yjl
JlN<w
private int[] queue; ' +[fJ>Le
%N-f9o8
public int get() { Mhj.3nN
return queue[1]; km#Rh^
} oSqkAAGz\
79Si^n1\
public void remove() { K9N\E"6ZP
SortUtil.swap(queue,1,size--); 5"&{Egc_
fixDown(1); ;K<W<v5m0N
} N2S7=`5/T
file://fixdown roG f &
private void fixDown(int k) { Lr`G. e
int j; Sg}]5Mn`
while ((j = k << 1) <= size) { aJ}Cqk
if (j < size %26amp;%26amp; queue[j] j++; FrBJv<
if (queue[k]>queue[j]) file://不用交换 /\1MG>#K
break; V9i[dF
SortUtil.swap(queue,j,k); VWR6/,N^_
k = j; (GJW3
} T*sB Wn'am
} W"L;8u
private void fixUp(int k) { d|(@#*{T]
while (k > 1) { -&\?Q_6
int j = k >> 1; a8!/V@a
if (queue[j]>queue[k]) _3?7iH
break; V:8ph`1
SortUtil.swap(queue,j,k); yzQ^KqLH
k = j; %?[H=v(b
} Yhkn(k2
} ^l"
{:r8X
} c'r7sI%Yi
qdeS*rp\
} -P>f2It
;F!wyTF>}
SortUtil： 92HxZ*t7km
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package org.rut.util.algorithm; R@)L@M)u;
Vr=c06a2
import org.rut.util.algorithm.support.BubbleSort; U[ $A=e?\Y
import org.rut.util.algorithm.support.HeapSort; N [iv.B
import org.rut.util.algorithm.support.ImprovedMergeSort; ,5L[M&5
import org.rut.util.algorithm.support.ImprovedQuickSort; qhiO( !jK
import org.rut.util.algorithm.support.InsertSort; Z#lZn!EbK
import org.rut.util.algorithm.support.MergeSort; 4-:TQp(
import org.rut.util.algorithm.support.QuickSort; `d[ja,
import org.rut.util.algorithm.support.SelectionSort; }6V` U9^g
import org.rut.util.algorithm.support.ShellSort; 3bp'UEF^k
oAgO3x
/** f}1R,N_fC
* @author treeroot +u:Q+PkM
* @since 2006-2-2 ,TAzJ
* @version 1.0 9e|]H+y
*/ ^"!j m
public class SortUtil { ]M;aVw<!
public final static int INSERT = 1; tzeS D C
public final static int BUBBLE = 2; aN5w
public final static int SELECTION = 3; b8@gv OB
public final static int SHELL = 4; s-He
public final static int QUICK = 5; BiUOjQC#
public final static int IMPROVED_QUICK = 6; .v3~2r*&
public final static int MERGE = 7; YQI&8~z
public final static int IMPROVED_MERGE = 8; T]%:+_,
public final static int HEAP = 9; phA^ kdW
$m;rOKVU
public static void sort(int[] data) { KF[P /cFI
sort(data, IMPROVED_QUICK); MH>CCT
} >dW~o_u'QN
private static String[] name={ i$A0_ZJKjZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =A,6KY=E
}; }I\hOL
\*V`w@
private static Sort[] impl=new Sort[]{ Z+< zKn}
new InsertSort(), k-b0Eogp]
new BubbleSort(), 2vit{
new SelectionSort(), PfI~`ke
new ShellSort(), buRK\C
new QuickSort(), "Oh(&N:U
new ImprovedQuickSort(), iS{8cN3R
new MergeSort(), y:N QLL>
new ImprovedMergeSort(), >e7w!v]
new HeapSort() ;nPjyu'g
}; =2z9Aq{
P%6-W5<
public static String toString(int algorithm){ + W ? /A]
return name[algorithm-1]; ad1%"~1
} $Y!$I.+
_[,oP s:+
public static void sort(int[] data, int algorithm) { 'Zdjd]
impl[algorithm-1].sort(data); xi]qdiA
} I3A@0'Vm;L
Rmrv@.dr!
public static interface Sort { >!vb;a!
public void sort(int[] data); B!=JRfT
} u*ZRU 4U
fBptjt_
public static void swap(int[] data, int i, int j) { TqM(I[J7\
int temp = data; R~$W
data = data[j]; fJ3*'(
data[j] = temp; ?=%Q$|]-
} '=_}&
} 7B`,q-x.