[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; aG8}R~wH&
} lz EF^6I
int i1=l; $:s1x\ol
int i2=mid+1; tfvX0J
for(int cur=l;cur<=r;cur++){ 3/>McZ@OH
if(i1==mid+1) Byyus[b'A
data[cur]=temp[i2++]; -7*,}xV
else if(i2>r) nZhL
data[cur]=temp[i1++]; FJKt5}`8
else if(temp[i1] data[cur]=temp[i1++]; o8BbSZVu
else "2)<'4q5)
data[cur]=temp[i2++]; RtGETiA\b
} 'N)&;ADx-G
} cfMj^*I
uI@:\Rss
} Vc$x?=
_+N*4
改进后的归并排序: Ku*@4#<L6h
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package org.rut.util.algorithm.support; aJ88U69
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import org.rut.util.algorithm.SortUtil; bdk"7N
m.EI("n"J
/** XL>Vwd
* @author treeroot r5Jy( ~
* @since 2006-2-2 bv5,Yk
* @version 1.0 ;hJTJMA6/6
*/ )}hp[*C
public class ImprovedMergeSort implements SortUtil.Sort { ^IOf%
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private static final int THRESHOLD = 10; \/la`D
`QXO+'j4
/* t8\F7F P
* (non-Javadoc) )\l}i%L:
* gpVZZ:~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yvs)H'n=
*/ *oL?R2#7
public void sort(int[] data) { vXLiYWo
int[] temp=new int[data.length]; 63QMv[`,
mergeSort(data,temp,0,data.length-1); v#@"Evh7
} y/h~oGxy
++-HdSHY
private void mergeSort(int[] data, int[] temp, int l, int r) { {'E%SIRZ)
int i, j, k; ]Vo;ZY_\
int mid = (l + r) / 2; 4 FW~Y
if (l == r) %N7b XKDP
return; eZIqyw
if ((mid - l) >= THRESHOLD) y!u)q3J0&
mergeSort(data, temp, l, mid); "yXKu)_
else lPSyFb"
insertSort(data, l, mid - l + 1); d+rrb>-OU
if ((r - mid) > THRESHOLD) =21$U[
mergeSort(data, temp, mid + 1, r); H ifKa/}P8
else qxf!]jm
insertSort(data, mid + 1, r - mid); EeG7 %S 5(
& V^Z
for (i = l; i <= mid; i++) { H)}>&Z4
temp = data; Ij` %'/J
} 0#<q]M?hW
for (j = 1; j <= r - mid; j++) { 'Xoif"
temp[r - j + 1] = data[j + mid]; v{Al>v}}n
} O $'#8
int a = temp[l]; 9cp-Rw<tI
int b = temp[r]; Urj8v2k
for (i = l, j = r, k = l; k <= r; k++) { Xt^ldW
if (a < b) { %%)"W n#`
data[k] = temp[i++]; >0DQ<@ot:
a = temp; t,#7F$t
} else { jOa .h
data[k] = temp[j--]; ^=.R#zrc
b = temp[j]; D+P(
} F{0Z
} BaZ$pO^
} 'FgBYy/
P}29wrIZ
/** 8om6wALXB
* @param data 7n9&@D3:P
* @param l t6m3lq{
* @param i Bha#=>4FU
*/ '#!nK O2<
private void insertSort(int[] data, int start, int len) { K'%2'd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zsFzF`[k
} ;{EIx*<d
} }(A`aB_
} yG)xsY V
} Xyy;BO:
n^B9Mh@
堆排序： 3}(6z"r
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package org.rut.util.algorithm.support; ;>np2K<`
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import org.rut.util.algorithm.SortUtil; 4~xKW2*`K
Q)c3=.[>
/** g= ~Y\$&
* @author treeroot k#uSH eq7f
* @since 2006-2-2 a?S5 =
* @version 1.0 E-IVv
*/ :+NZW9_
public class HeapSort implements SortUtil.Sort{ <*EMcZ
?!^ow5"8
/* (non-Javadoc) n75)%-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k>E^FB=
*/ fb-Lp#!T39
public void sort(int[] data) { q;Tdqv!Ju
MaxHeap h=new MaxHeap(); WD# 96V
h.init(data); +Ac.@!X}%
for(int i=0;i h.remove(); ~k\Dde
System.arraycopy(h.queue,1,data,0,data.length); }A jE- K{
} vz5x{W
vF@hg)A
private static class MaxHeap{ Wip@MGtJ
M2H +1ic
void init(int[] data){ uonCD8
this.queue=new int[data.length+1]; T<yAfnTb`
for(int i=0;i queue[++size]=data; X-LCIT|1
fixUp(size); \c}_!.xj"
} H3-(.l[!b)
} 0DtewN{Z
jq%%|J.x
private int size=0; '&hz*yk
Ak3cE_*Y/
private int[] queue; %O6r
!q\MXS($#u
public int get() { ]QKo>7%[
return queue[1]; p3r("\Za,
} GsIVx!
>[}lC7 z,
public void remove() { R !g'zS'
SortUtil.swap(queue,1,size--); `#HtVI
fixDown(1); yq.<,b=87
} f~Y;ZvB
file://fixdown 4`yE'%6.}
private void fixDown(int k) { mi[t1cN)=
int j; !Gob `# r
while ((j = k << 1) <= size) { ]1hyvm3
if (j < size %26amp;%26amp; queue[j] j++; /pY-how%!
if (queue[k]>queue[j]) file://不用交换 O6*2oUKqK
break; 8;6j
SortUtil.swap(queue,j,k); ')N[)&&Q{
k = j; 1WjNFi
} Zt_~Zxn3
} (4o<U%3kGq
private void fixUp(int k) { &!P' M
while (k > 1) { X*cDn.(I
int j = k >> 1; &Va="HNKt
if (queue[j]>queue[k]) E{;F4wT_@
break; v[;R(pt?
SortUtil.swap(queue,j,k); srPczVG*
k = j; o|:c{pwq
} n%|og^\0
} PRJ
8[b_E5!V
} ES-V'[+jDy
T:T`M:C.
} K|pg'VT"
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SortUtil： Az7 ]qb
Su/8P[q_
package org.rut.util.algorithm; {W+IUvn
vf&_ N
import org.rut.util.algorithm.support.BubbleSort; RW{y.WhB
import org.rut.util.algorithm.support.HeapSort; U$yy7}g
import org.rut.util.algorithm.support.ImprovedMergeSort; QyghNImp
import org.rut.util.algorithm.support.ImprovedQuickSort; (}g4}A@x
import org.rut.util.algorithm.support.InsertSort; GY>G}bfh
import org.rut.util.algorithm.support.MergeSort; O&dBLh!G
import org.rut.util.algorithm.support.QuickSort; {FQ@eeU
import org.rut.util.algorithm.support.SelectionSort; @E 8P>kq
import org.rut.util.algorithm.support.ShellSort; @An}
0=0,ix7?#
/** \sMe2OL#z
* @author treeroot *\.8*6*$!
* @since 2006-2-2 rJZR8bo
* @version 1.0 (> W\Nf
*/ l~]D|92
public class SortUtil { l-Be5?|{_
public final static int INSERT = 1; GO?hB4 9T
public final static int BUBBLE = 2; _aeIK
public final static int SELECTION = 3; t4iD<{4
public final static int SHELL = 4; [rkw k\m*
public final static int QUICK = 5; !4-4i
public final static int IMPROVED_QUICK = 6; X+1Mv
public final static int MERGE = 7; d-3.7nJ:
public final static int IMPROVED_MERGE = 8; /#WvC;B
public final static int HEAP = 9; V7b;qC'
Rk,'ujc
public static void sort(int[] data) { beaSvhPU
sort(data, IMPROVED_QUICK); =t^jlb
} O1D|T"@
private static String[] name={ rFUR9O.{E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G9^xv
}; vgE -t
)I#{\^
private static Sort[] impl=new Sort[]{ mC0_rN^Aj
new InsertSort(), -"NK"nb
new BubbleSort(), He,,bq
new SelectionSort(), @R-11wP)M
new ShellSort(), N4#D&5I",
new QuickSort(), :YQI1 q[6
new ImprovedQuickSort(), br^ A<@,d
new MergeSort(), &~Pk*A_:
new ImprovedMergeSort(), *`} !{ Mb
new HeapSort() k".kbwcaF
}; uNkJe
c]h@<wnv
public static String toString(int algorithm){ 0SfW:3
return name[algorithm-1]; B0U(B\~Y
} Bn9#F#F<
m]vS"AdX
public static void sort(int[] data, int algorithm) { +OqEe[Wk#
impl[algorithm-1].sort(data); ]#Cc7wa
} 9: .m]QN
,z<1:st]<
public static interface Sort { N]eBmv$|
public void sort(int[] data); 3&>0'h
} wVqp')e
2}=@n*8*d
public static void swap(int[] data, int i, int j) { C1'y6{,@
int temp = data; hxzA1s%~
data = data[j]; CuD}Uo+u
data[j] = temp; O wuc9
} &r.M~k >
} ; PncJe5x