[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; g!i45-n3gt
} *FfMI
int i1=l; 5~.ZlGd
int i2=mid+1; unJ R=~E
for(int cur=l;cur<=r;cur++){ U#n#7G6fRp
if(i1==mid+1) fGv#s X
data[cur]=temp[i2++]; zFQ&5@43
else if(i2>r) &wU'p-V
data[cur]=temp[i1++]; 8_&CT :u>
else if(temp[i1] data[cur]=temp[i1++]; !;Jmg
else BI:k#jO!
data[cur]=temp[i2++]; *0_yT$
} 9=,uq;
} zyg:nKQW
m>}8'N)
} nr)c!8
63!rUB!
改进后的归并排序: ?+c`]gO7N
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package org.rut.util.algorithm.support; UA~RK2k?
f/kI|Z
import org.rut.util.algorithm.SortUtil; \*\R1_+
5/QRL\
/** cE iu)2*e
* @author treeroot ?k[p<Uo
* @since 2006-2-2 3M0+"l(X
* @version 1.0 ez3Z3t`
*/ Ke-)vPc
public class ImprovedMergeSort implements SortUtil.Sort { Wy]^Ub gW
4gSH(*}
private static final int THRESHOLD = 10; b.O9ITR
J4=_w
/* CU:o*;jP
* (non-Javadoc) dx,=Rd5'
* +uWYK9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UwY-7Mmo
*/ =TP( UJ
public void sort(int[] data) { D^U: ih
int[] temp=new int[data.length]; ]0B|V2D#e
mergeSort(data,temp,0,data.length-1); #&8}<8V
} L0%hnA@
W2;N<[wa<u
private void mergeSort(int[] data, int[] temp, int l, int r) { f&4,?E;6%
int i, j, k; LzDI0a.
int mid = (l + r) / 2; ];+#i"l
if (l == r) 65,(4Udz!
return; ^O^:$nXhYy
if ((mid - l) >= THRESHOLD) h5kPn~
mergeSort(data, temp, l, mid); /$"[k2 N
else QFPfIb/
insertSort(data, l, mid - l + 1); O;HY%
if ((r - mid) > THRESHOLD) GO! uwo:
mergeSort(data, temp, mid + 1, r); fWGOP~0
else 3E^M?N2oc
insertSort(data, mid + 1, r - mid); ]=73-ywn]
nsb4S{
for (i = l; i <= mid; i++) { I1U7.CT
temp = data; 6 fz}
} k;dXOn
for (j = 1; j <= r - mid; j++) { z5Qs@dG
temp[r - j + 1] = data[j + mid]; XA_FOw!cX
} +~nzii3
int a = temp[l]; _U|7'^|
int b = temp[r]; Xj+q~4{|vt
for (i = l, j = r, k = l; k <= r; k++) { wyxGe<1
if (a < b) { :`vP}I ^
data[k] = temp[i++]; 6qo^2
a = temp; >cL{Ya}Rz
} else { DZ ^1s~
data[k] = temp[j--]; s]27l3)B
b = temp[j]; HjWq[[Nz
} W</n=D<,I
} t j Vh^
} VyG4(Xva
Z<b"`ty.
/** 4\ /*jA
* @param data G&eP5'B4i
* @param l qu6DQ@ ~YC
* @param i SKY*.IW/Z
*/ 9=dkx^q
private void insertSort(int[] data, int start, int len) { FZpKFsPx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pL1s@KR
} Lp:6 ;
} >n.z)ZJ
} -qV{WZHp
} FdOFE.l
X7*`
堆排序： fn{S "33"
J?:[$C5
package org.rut.util.algorithm.support; |f2A89
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import org.rut.util.algorithm.SortUtil; !$XHQLqF2
dpN@#w
/** }b["Jk\2
* @author treeroot x4a:PuqmGG
* @since 2006-2-2 6er(%4!
* @version 1.0 )E7 FA|
*/ T9y;OG
public class HeapSort implements SortUtil.Sort{ ZX`J8lZP
^DAa%u
/* (non-Javadoc) +zOOdSFk.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zxZtz
*/ zz$q5[n
public void sort(int[] data) { &;q<M_<
MaxHeap h=new MaxHeap(); NSLVD[yT
h.init(data); `m%dX'0E
for(int i=0;i h.remove(); GSVdb/+
System.arraycopy(h.queue,1,data,0,data.length); \94jrr
} {M~lbU
V`a+Hi<P\
private static class MaxHeap{ 9|:^k.
U_z2J(e~
void init(int[] data){ T>]sQPg
this.queue=new int[data.length+1]; 0^!Gib
for(int i=0;i queue[++size]=data; hY\{|
fixUp(size); nZvU'k:
} V/#v\*JHFc
} CSn<]%GL
.5tg4%l
private int size=0; nf%4sIQ*x
7$T8&Mh
private int[] queue; &&RA4
^3I'y UsY
public int get() { /r$&]C:Fi
return queue[1]; -]"T^wib
} 2g`[u|
~5#)N{GbY
public void remove() { }B!cv{{
SortUtil.swap(queue,1,size--); M?:\9DDd
fixDown(1); r:l96^xs
} oFg'wAO.
file://fixdown }N3`gCy9eN
private void fixDown(int k) { XdIah<F2
int j; JAb$M{t
while ((j = k << 1) <= size) { >2-F2E,
if (j < size %26amp;%26amp; queue[j] j++; Z^6#4Q]YC
if (queue[k]>queue[j]) file://不用交换 eO4)|tW
break; !ng\` |8?
SortUtil.swap(queue,j,k); bejGfc
k = j; !;}2F-
} P\B3 y+)
} L~0& Q
private void fixUp(int k) { $iJnxqn
while (k > 1) { ,w\ wQn>]K
int j = k >> 1; wL eHQ]
if (queue[j]>queue[k]) !]DuZ=
break; W%8+t)
SortUtil.swap(queue,j,k); _`aR_%Gx
k = j; L{PH0Jf
} =:5<{J OG
} a&5g!;.
Va9q`XbyO
} V<0$xV1b|=
d(l|hmj4j9
} i:Mc(mW
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SortUtil： ep?:;98|t
S%+R#A1
package org.rut.util.algorithm; t"YIq/08
d^aNR Lv
import org.rut.util.algorithm.support.BubbleSort; 5~xeO@%I
import org.rut.util.algorithm.support.HeapSort; %Dyh:h
import org.rut.util.algorithm.support.ImprovedMergeSort; Mvof%I
import org.rut.util.algorithm.support.ImprovedQuickSort; r@$B'CsLj
import org.rut.util.algorithm.support.InsertSort; 6&],WGz
import org.rut.util.algorithm.support.MergeSort; 9s $PrF
import org.rut.util.algorithm.support.QuickSort; KM5 JZZP
import org.rut.util.algorithm.support.SelectionSort; ec'tFL#u{
import org.rut.util.algorithm.support.ShellSort; <d!6[,W;
DT? m/*
/** hDtKnF
* @author treeroot \!PV*%P
* @since 2006-2-2 Jr?!Mh-
* @version 1.0 nVTM3Cz
*/ V4?Oc2mS
public class SortUtil { ,8`O7V{W
public final static int INSERT = 1; #:W%,$9\P
public final static int BUBBLE = 2; A}4t9|/K6
public final static int SELECTION = 3; C"No5r'K3
public final static int SHELL = 4; h6FgS9H
public final static int QUICK = 5; :@e\'~7sH
public final static int IMPROVED_QUICK = 6; GN%<"I.
public final static int MERGE = 7; MgnE-6_c
public final static int IMPROVED_MERGE = 8; w a.f![
public final static int HEAP = 9; Ki 3_N*z
(w2(qT&O
public static void sort(int[] data) { >ZDC . ~
sort(data, IMPROVED_QUICK); q]ZSjJ
} s"rg_FoL
private static String[] name={ ?z"YC&Tp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K{FhT9R'
}; Z!)f*
Qdm(q:w
private static Sort[] impl=new Sort[]{ G1r V<,#m
new InsertSort(), [D9:A
new BubbleSort(), "i''Ui\H
new SelectionSort(), l'2H4W_+
new ShellSort(), y*|L:!
new QuickSort(), x~(y "^ph
new ImprovedQuickSort(), '_E c_F
new MergeSort(), ^6&_|f
new ImprovedMergeSort(), _=T]PSauI
new HeapSort() + o{*r#
}; M\jB)@)
%(NN*o9"q
public static String toString(int algorithm){ H oS|f0
return name[algorithm-1]; 5%qH7[dx
} 1w) fu
C$ hQN
public static void sort(int[] data, int algorithm) { nr<.YeJ
impl[algorithm-1].sort(data); 6'vi68
} R}.3|0
1O9$W?)Q
public static interface Sort { >gGil|I
public void sort(int[] data); @:IL/o*
} |Ib.)
Y`=z.D{
public static void swap(int[] data, int i, int j) { 1!s!wQgS
int temp = data; &$Ci}{{n#
data = data[j]; -PXoMZx%
data[j] = temp; .SBc5KX
} jRwa0Px(
} QP<FCmt8