[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; !+sC'/
} RMinZ}/
int i1=l; s)Gnj;
int i2=mid+1; bYPkqitqz
for(int cur=l;cur<=r;cur++){ U3Fa.bC6}
if(i1==mid+1) 2nNBX2o&_
data[cur]=temp[i2++]; 8*nv+
else if(i2>r) w_c)iJ
data[cur]=temp[i1++]; y^PQgzm]
else if(temp[i1] data[cur]=temp[i1++]; d:Y!!LV-@L
else UL9]LEGG
data[cur]=temp[i2++]; @vsgmz
} nWfzwXP>_
} oXC|q-(C
4Zz%vY
} 06ndW9>wD)
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改进后的归并排序: U0%T<6*H
[/h3HyZ.
package org.rut.util.algorithm.support; 9v\x&h
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import org.rut.util.algorithm.SortUtil; 0P{^aSxTP
U2v;[>=]
/** [HRry2#s
* @author treeroot \a<7DTV
* @since 2006-2-2 e"Y ( 7<
* @version 1.0 :;Lt~:0b~
*/ CbvP1*1
public class ImprovedMergeSort implements SortUtil.Sort { [Lck55V+Q
xq6 eu 9
private static final int THRESHOLD = 10; d#-scv}s5
:n#8/'%1
/* #$5"&SM
* (non-Javadoc) ;(&$Iw9X
* X8}m %
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WqX$;'}h
*/ UL{+mp
public void sort(int[] data) { 6tx5{Xl-o
int[] temp=new int[data.length]; y4\(ynk
mergeSort(data,temp,0,data.length-1); JfOBZQ
} a&^HvXO(>(
x;^DlyyYU
private void mergeSort(int[] data, int[] temp, int l, int r) { fL^$G;_?3
int i, j, k; !.2tv
int mid = (l + r) / 2; =3h?!$#?
if (l == r) DOaTp f
return; :EGvI
if ((mid - l) >= THRESHOLD) (:(Imk;9
mergeSort(data, temp, l, mid); _i3?;Fds
else "[wkjNf%
insertSort(data, l, mid - l + 1); ojc m%yd
if ((r - mid) > THRESHOLD) w3n6md
mergeSort(data, temp, mid + 1, r); v}cTS@0
else 1>c^-"#e^
insertSort(data, mid + 1, r - mid); D(;jv="/
o+],L_Ab
for (i = l; i <= mid; i++) { VQ R E]
temp = data; {6I)6}w!k
} ,`pUz[wl
for (j = 1; j <= r - mid; j++) { R|@?6<
temp[r - j + 1] = data[j + mid]; +g9CklJ
} N9dx^+\
int a = temp[l]; La2f]+sV
int b = temp[r]; ;b`kN;s
for (i = l, j = r, k = l; k <= r; k++) { U/#X,Bi~
if (a < b) { HZawB25{
data[k] = temp[i++]; ^)nIf)9}7
a = temp; Qi=pP/Y
} else { kC_Kb&Q0
data[k] = temp[j--]; YHp]O+c
b = temp[j]; zhC#<
} (v,g=BS,
} W" i3:r
} [mcER4]}
UfkQG`G9H
/** T5_/*`F
* @param data I3.cy i
* @param l cU|tG!Ij?
* @param i ,k9xI<i
*/ 9 df GV!Z
private void insertSort(int[] data, int start, int len) { u|+Dqe`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Im!fZg
} t"$#KP<
} ~LF/wx>
} &SW~4{n:
} >^~W'etX|
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堆排序： 5F78)qu6N
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package org.rut.util.algorithm.support; ;S?ei>Q
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import org.rut.util.algorithm.SortUtil; K2qKkV@
O~OM.:al&
/** S*NeS#!v
* @author treeroot L2Fi/UWM
* @since 2006-2-2 4*&2D-8<K
* @version 1.0 z7s}-w,
*/ cz41<SFL
public class HeapSort implements SortUtil.Sort{ [{q])P;
-PCFOm"
/* (non-Javadoc) Ou]!@s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2dCD.9s9~
*/ $}t;c62
public void sort(int[] data) { 6Qn};tbnD
MaxHeap h=new MaxHeap(); c=f;3N
h.init(data); aeE~[m
for(int i=0;i h.remove(); ATF>"Ux
System.arraycopy(h.queue,1,data,0,data.length); G.~Ffk
} gs(ZJO1 /L
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private static class MaxHeap{ &9EcgazV
fp?/Dg"49.
void init(int[] data){ $#-O^0D
this.queue=new int[data.length+1]; cDq*B*e
for(int i=0;i queue[++size]=data; .naSK`J,`
fixUp(size); &<EixDi4q
} K2gF;(
} BU O8Z]
=@P]eK/
private int size=0; ap<r)<u
skF}_
private int[] queue; bAEwjZ
zym6b@+jN
public int get() { 9z+ZFIf7d
return queue[1]; YJ}9VY<}1K
} C$d b)5-
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public void remove() { !8|?0>3)
SortUtil.swap(queue,1,size--); {$I1(DYN
fixDown(1); ]VaMulb4
} qb$M.-\ne
file://fixdown J;N\q
private void fixDown(int k) { fW$1f5g"
int j; JvF0s}#4
while ((j = k << 1) <= size) { qG3MyK%O\
if (j < size %26amp;%26amp; queue[j] j++; k54b@U52 h
if (queue[k]>queue[j]) file://不用交换 sZ0)f!aH:_
break; %GGSd0 g
SortUtil.swap(queue,j,k); N j:W6? A
k = j; 2>g!+p Ox
} $ve*j=p
} Q!(qb
private void fixUp(int k) { SP;1XXlL
while (k > 1) { p: u@? k
int j = k >> 1; 7w}]9wCN?
if (queue[j]>queue[k]) a&Me#H{
break; juQ?k xOB
SortUtil.swap(queue,j,k); T2TWb
k = j; >$7{H]
} kR<\iT0j
} x_- SAyH
<CWOx&hr
} QO %;%p*
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} U:gvK8n
5}2148
SortUtil： @v/ 8}n
eC_i]q&o|
package org.rut.util.algorithm; HE-ErEtGB
2+yti,s+/
import org.rut.util.algorithm.support.BubbleSort; :Aj[#4-=
import org.rut.util.algorithm.support.HeapSort; f.:0T&%G
import org.rut.util.algorithm.support.ImprovedMergeSort; PJAM_K;
import org.rut.util.algorithm.support.ImprovedQuickSort; 0U!_o2]
import org.rut.util.algorithm.support.InsertSort; TVK*l*
import org.rut.util.algorithm.support.MergeSort; T3t w.yh
import org.rut.util.algorithm.support.QuickSort; QG5c>Q
import org.rut.util.algorithm.support.SelectionSort; ,7;euV5X
import org.rut.util.algorithm.support.ShellSort; Wf=hFc1_@
}^`5$HEi
/** EJ(z]M`f
* @author treeroot NW`Mc&
* @since 2006-2-2 REPI>-|
* @version 1.0 =<Ss&p>
*/ Y ^5RM
public class SortUtil { 8-9<r
public final static int INSERT = 1; B3p79j
public final static int BUBBLE = 2; pwl7aC+6d
public final static int SELECTION = 3; :q$.=?X3
public final static int SHELL = 4; %1rN6A!%
public final static int QUICK = 5; ,qIut|C*
public final static int IMPROVED_QUICK = 6; eIbz`|%3
public final static int MERGE = 7; 8COGe=+o
public final static int IMPROVED_MERGE = 8; >[<f\BN|
public final static int HEAP = 9; TlC??#
H<
public static void sort(int[] data) { :`S\p[5
sort(data, IMPROVED_QUICK); <-HWs@8#
} JTTI`b2l_
private static String[] name={ e09QaY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "sed{?
}; X\5EF7:S
!(sL
private static Sort[] impl=new Sort[]{ G;]zX<2^3
new InsertSort(), 8< "lEL|
new BubbleSort(), *rC%nmJwk!
new SelectionSort(), 7=HpEc
new ShellSort(), BX2}ar
new QuickSort(), FLQ^J3A,I
new ImprovedQuickSort(), 8O0]hz
new MergeSort(), NZ-57Ji
new ImprovedMergeSort(), } A}Vd:#
new HeapSort() iThf\
}; '&Tz8.jp~
LG=_>:~t>
public static String toString(int algorithm){ q5.5%W
return name[algorithm-1]; ^geY Ay
} FZN}T{<
C <H$}f
public static void sort(int[] data, int algorithm) { :!fU+2$`^(
impl[algorithm-1].sort(data); W\O.[7JP
} *7C l1o
bK|nxL
public static interface Sort { P?zL`czWd
public void sort(int[] data); hYVy65Ea
} 2lxA/.f
Pk^V6-
public static void swap(int[] data, int i, int j) { 3#idXc
int temp = data; G$jw#a[L
data = data[j]; oSH]TL2@Cd
data[j] = temp; 1t7T\~+F
} UC!"1)~mt`
} +Rq]_sDu