[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; lB}?ey
} )~M@2;@L
int i1=l; ,]wab6sY
int i2=mid+1; mmQC9nZ
for(int cur=l;cur<=r;cur++){ tFcQ.1
if(i1==mid+1) Q_T,=y
data[cur]=temp[i2++]; d 6Y9D=O
else if(i2>r) ['QhC({
data[cur]=temp[i1++]; [,bJKz)a
else if(temp[i1] data[cur]=temp[i1++]; kwi$%
else 'q}Ud10c
data[cur]=temp[i2++]; pyf'_
} mR.j8pi
} @Z0. }}Y
ZW M:Wj192
} 5ncW s)
,WdSJ BK'a
改进后的归并排序: +s}!+I8P
D[W` q#W
package org.rut.util.algorithm.support; "]^U(m>f
w !kk(QMV
import org.rut.util.algorithm.SortUtil; /5%'q~
2k!uk6
/** &[`24Db
* @author treeroot Wz^;:6F
* @since 2006-2-2 oD%n}
* @version 1.0 D~inR3(}
*/ ~N/%R>(v
public class ImprovedMergeSort implements SortUtil.Sort { Sh;`<Ggi~
?Gf'G{^}
private static final int THRESHOLD = 10; K*^'tltJ
H28-;>'`
/* M"mvPr9
* (non-Javadoc) WLWfe-
* ^PdD-tY<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qY&(O`?m&
*/ [6@bsXiw
public void sort(int[] data) { Sw$&E
int[] temp=new int[data.length]; [1~3\-Y
mergeSort(data,temp,0,data.length-1); %B&O+~
} .KYs5Qu
TrZ!E`~
private void mergeSort(int[] data, int[] temp, int l, int r) { !B[Y?b:
int i, j, k; ym p*:lH(
int mid = (l + r) / 2; Bl)D/
if (l == r) '>OEQU5-
return; )1 @v<I
if ((mid - l) >= THRESHOLD) $_%
mergeSort(data, temp, l, mid); n2aUj(Zs=
else y2k's
insertSort(data, l, mid - l + 1); %AV3eqghCg
if ((r - mid) > THRESHOLD) UB] tKn
mergeSort(data, temp, mid + 1, r); depCqz@
else 9[t-W:3c7
insertSort(data, mid + 1, r - mid); dyqk[$(
?n<sN"
for (i = l; i <= mid; i++) { w8>lWgN
temp = data; 7d{xXJ-
} ^`-Hg=d
for (j = 1; j <= r - mid; j++) { %jUZc:06
temp[r - j + 1] = data[j + mid]; E.'6p \
} .K940& Ui
int a = temp[l]; qoan<z7
int b = temp[r]; `U?S 9m
for (i = l, j = r, k = l; k <= r; k++) { mGz'%?zj
if (a < b) { sS)tSt{C
data[k] = temp[i++]; X"8$,\wX,
a = temp; kPEU}Kv
} else { +Kmxo4p
data[k] = temp[j--]; uA?a DjA
b = temp[j]; }zo-%#
} >iJxq6!
} w6 Y+Y;,'f
} 8}z PDs
'o_ RC{k2"
/** U;4;>
* @param data xZAg
* @param l ^')4RU
* @param i HDo=WqG
*/ _#<l -R`
private void insertSort(int[] data, int start, int len) { *nM.`7g*[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~9fTs4U
} Z,3CMWHg
} G*v,-O
} _qit$#wK;
} { F0"U=
<^Q` y
堆排序： EU5(s*A
$YBH;^#
package org.rut.util.algorithm.support; ieyqp~+|4$
c1]\.s
import org.rut.util.algorithm.SortUtil; IxP$lx
'u[cT$
/** =F*{O=
* @author treeroot 0Oq5;5
* @since 2006-2-2 m[5ed1+
* @version 1.0 lKirc2
*/ UR`pZ.U?
public class HeapSort implements SortUtil.Sort{ Tq6@ 1j6p
HV3D$~gF
/* (non-Javadoc) wZ8LY;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `Q^Vm3h
*/ k/xNqN(
public void sort(int[] data) { BW)t2kR&
MaxHeap h=new MaxHeap(); zHj_q%A
h.init(data); KrECAc
for(int i=0;i h.remove(); @0:mP
System.arraycopy(h.queue,1,data,0,data.length); }>Lz\.Z/+[
} Z*5]qh2r8
z:$TW{%M
private static class MaxHeap{ P[cGCmM
YAF0I%PYU
void init(int[] data){ qr/N?,
this.queue=new int[data.length+1]; 3TD!3p8
for(int i=0;i queue[++size]=data; l5k]voG
fixUp(size); 8j%lM/ v
} 2wh{[Q2f
} 5al44[
cW $~86u"C
private int size=0; 9;c]_zt
-E!V;Tgc%U
private int[] queue; h9{'w
l\-(li H
public int get() { YwM;G g3
return queue[1]; E?f*Z{~,
} !FnH;
v3jx2Z
public void remove() { UUql"$q
SortUtil.swap(queue,1,size--); yIThzyS
fixDown(1); (au7wI{
} 7<ES&ls_
file://fixdown q}R"
private void fixDown(int k) { |7T!rnr
int j; jZY9Lx8o
while ((j = k << 1) <= size) { ;c>Rjg&[
if (j < size %26amp;%26amp; queue[j] j++; 'uOp?g'7
if (queue[k]>queue[j]) file://不用交换 Ie;}k;?-
break; seH#v
SortUtil.swap(queue,j,k); :!EOg4%i
k = j; 4a~9?}V:
} 4B8{\"6
} pRdO4?l
private void fixUp(int k) { mk~Lkwl
while (k > 1) { !*xQPanL
int j = k >> 1; Ts:pk
if (queue[j]>queue[k]) WS0RvBvb
break; Wm ?RB0
SortUtil.swap(queue,j,k); BPKeG0F7
k = j; U`"nX)$
} Ih95&HsdC
} c~Hq.K$d
LNU9M>
} V#6`PD6
0?j+d8*
} STB=#z
oM-@B'TK
SortUtil： 4d3PF`,H`
7"y"%+*/
package org.rut.util.algorithm; SIRZ_lt$r
R\=y/tw0H
import org.rut.util.algorithm.support.BubbleSort; :FdV$E]]<
import org.rut.util.algorithm.support.HeapSort; i_&&7.
import org.rut.util.algorithm.support.ImprovedMergeSort; D &wm7,
import org.rut.util.algorithm.support.ImprovedQuickSort; `}u~nu<
import org.rut.util.algorithm.support.InsertSort; -OuMC&
import org.rut.util.algorithm.support.MergeSort; j:,*Liz
import org.rut.util.algorithm.support.QuickSort; ODM<$Yo:d
import org.rut.util.algorithm.support.SelectionSort; .,x08M
import org.rut.util.algorithm.support.ShellSort; TM':G9n
]IkjZ=
/** mvxg|<
* @author treeroot Z;i^h,j?$1
* @since 2006-2-2 ZD0Q<8%
* @version 1.0 EY!aiH6P
*/ 8DLMxG
public class SortUtil { !/$BXUrd
public final static int INSERT = 1; 5,qfr!hN,
public final static int BUBBLE = 2; ,[^P
public final static int SELECTION = 3; X;p,Wq#D'
public final static int SHELL = 4; PHD$E s
public final static int QUICK = 5; 4oOe
public final static int IMPROVED_QUICK = 6; _Oq (&I
public final static int MERGE = 7; g!%csf
public final static int IMPROVED_MERGE = 8; c66Iy"
public final static int HEAP = 9; :h3 Gk;u
VxfFk4
public static void sort(int[] data) { 7z6yn=B
sort(data, IMPROVED_QUICK); c{#lKD<7
} TZZqV8
private static String[] name={ eGLLh_V"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c-avX
}; diqG8KaK
'F[QE9]*
private static Sort[] impl=new Sort[]{ `)H.TMI
new InsertSort(), =J?<M?ugf
new BubbleSort(), ScfW;
new SelectionSort(), 12E@9s$Z
new ShellSort(), iygdX2
new QuickSort(), 8'#%7+ "=!
new ImprovedQuickSort(), ,)Z^b$H]
new MergeSort(), Mi'eViH
new ImprovedMergeSort(), .'7o,)pJ<
new HeapSort() 'L0 2lM
}; <v[,A8Q
S3j/(BG
public static String toString(int algorithm){ M* QqiE
return name[algorithm-1]; })bTQj7
} 0 x"3
f+$/gz
public static void sort(int[] data, int algorithm) { '(u[
impl[algorithm-1].sort(data); E9226
} NP^kbF
;][1_
public static interface Sort { [?Aq#av
public void sort(int[] data); ~Cj+6CrT
} '1r:z, o|
S)$ES6]9/
public static void swap(int[] data, int i, int j) { v=SC*
int temp = data; iQin|$F_O
data = data[j]; wTIOCj
data[j] = temp; /2?GRwU~P
} w},k~5U^s
} 0VsrAV0