[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; vE;`y46&r
} BLgmFE2
int i1=l; Y 6K<e:Y
int i2=mid+1; cAM1\3HWT"
for(int cur=l;cur<=r;cur++){ 1?]Gl+}
if(i1==mid+1) w{?nX6a@p
data[cur]=temp[i2++]; Yn+/yz5k_
else if(i2>r) _Xlf}BE
data[cur]=temp[i1++]; xop9*Z$
else if(temp[i1] data[cur]=temp[i1++]; 4C/
else 1u:OzyJy
data[cur]=temp[i2++]; # 5v 2`|)
} QxwZ$?w%
} T?N' k=
"(F>?pq
} 8c3`IIzAS
z'O$[6m6
改进后的归并排序: ,+3l9FuQ
R44JK
package org.rut.util.algorithm.support; NS6#od ZeV
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import org.rut.util.algorithm.SortUtil; {# ;e{v
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/** _M8Q%
* @author treeroot =O?<WJoK
* @since 2006-2-2 w}zl=w{G
* @version 1.0 '!]ry<
*/ oL1m<cQo9
public class ImprovedMergeSort implements SortUtil.Sort { eh2w7@7Q
L7el5Q!Y=
private static final int THRESHOLD = 10; U;Se'*5xv
HDvj{
/* H^_[nL
* (non-Javadoc) H[U$4 %t
* !lG5BOJM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G#ZU^%$M,
*/ XE[~! >'
public void sort(int[] data) { {wih)XNY
int[] temp=new int[data.length]; iK#5HW{
mergeSort(data,temp,0,data.length-1); JBtcl#|
} SSYE&
(/14)"Sk
private void mergeSort(int[] data, int[] temp, int l, int r) { K{B[(](
int i, j, k; DNcf2_m
int mid = (l + r) / 2; U 3aY =8B
if (l == r) @\e2Q&O
return; d&&^_0O
if ((mid - l) >= THRESHOLD) m]R< :_
mergeSort(data, temp, l, mid); ,Bk mf|
else kIWQ _2
insertSort(data, l, mid - l + 1); 8G`fSac`
if ((r - mid) > THRESHOLD) }BlVLf%C
mergeSort(data, temp, mid + 1, r); u7ZSs-LuHw
else wo5"f}vd#
insertSort(data, mid + 1, r - mid); v~[=|_{
U2\g Kg[-Q
for (i = l; i <= mid; i++) { ;Xk-hhR
temp = data; b?jRA^
} _Isju S
for (j = 1; j <= r - mid; j++) { SL zL/5s
temp[r - j + 1] = data[j + mid]; L,*2tJcC<
} tPIT+1.]z
int a = temp[l]; xgn@1.}G
int b = temp[r]; ~J^Gzl
for (i = l, j = r, k = l; k <= r; k++) { !FX0Nx=oi
if (a < b) { 1q]V/V}
data[k] = temp[i++]; 5, R\tJCK
a = temp; e7T"?s
} else { cq>{
data[k] = temp[j--]; qX^#fk7]
b = temp[j]; N%v}$58Z
} mjO4GpG3
} .xS3,O_[
} 0%+S@_|
|&eZ[Sy(=l
/** *&9_+F8ly
* @param data <e-9We."
* @param l Qu,W3d
* @param i Y!c RzQ
*/ ``kiAKMy
private void insertSort(int[] data, int start, int len) { h}k&#X)7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lM`M70~
} _tTtq/z<
} Gl}[1<~o
} Ox7v*[x'
} "aIiW VQ
td%]l1
堆排序： JV(qTb W
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package org.rut.util.algorithm.support; `[3Iz$K=
:0|]cHm
import org.rut.util.algorithm.SortUtil; -CtLL_I
,l^; ZE
/** }R4%%)j(Vj
* @author treeroot |=L~>G
* @since 2006-2-2 ^2%_AP0=
* @version 1.0 :IlRn`9X`
*/ [* ,k
public class HeapSort implements SortUtil.Sort{ ,*$L_itL
`WQz_}TqB
/* (non-Javadoc) 7nM]E_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :@x24wN/
*/ N7Vv"o
public void sort(int[] data) { l5_RG,O0A
MaxHeap h=new MaxHeap(); ! 7A _UA8
h.init(data); )#n0~7 &
for(int i=0;i h.remove(); |TL&#U
System.arraycopy(h.queue,1,data,0,data.length); 1DVu`<OXcH
} xS?[v&"2
^ZV1Ev8T6
private static class MaxHeap{ (7^5jo[D
1"?3l`i
void init(int[] data){ Bd jo3eX
this.queue=new int[data.length+1]; c]LE9<G
for(int i=0;i queue[++size]=data; R#gt~]x6k
fixUp(size); aNLRUdc.
} gEcRJ1Q;C
} hEla8L4Y
q}P< Ejq}
private int size=0; |YCGWJaci
qPqpRi
private int[] queue; n6D9f~8"
1><@$kVMm~
public int get() { y|X</3w
return queue[1]; Z BjyQ4h
} hr3RC+ y
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public void remove() { "[M,PI!B
SortUtil.swap(queue,1,size--); Gu[G_^>
fixDown(1); lz=$Dz
} LA &W@
file://fixdown \) DJo
private void fixDown(int k) { )7!q>^S{B
int j; >xrO W`p]
while ((j = k << 1) <= size) { [&12`!;j
if (j < size %26amp;%26amp; queue[j] j++; l2H-E&'=
if (queue[k]>queue[j]) file://不用交换 JrlDTNJj'
break; hM$K?t
SortUtil.swap(queue,j,k); `/?XvF\
k = j; +g/TDwyVH
} JLgk?
} !SRElb A;i
private void fixUp(int k) { )y>o;^5'
while (k > 1) { xPMTmx?2
int j = k >> 1; =nPIGI72VO
if (queue[j]>queue[k]) Mh [TZfV
break; IIrh|>d_7
SortUtil.swap(queue,j,k); ?pSb,kN}'
k = j; E57:ap)/
} ffyDi1Q
} );EW(7KeL
XG_h\NIL
} %]NaHf
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} .}IxZM[}D
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SortUtil： @ 3n;>oi
-M=#U\D
package org.rut.util.algorithm; 7|$cM7_r
#._%~}U
import org.rut.util.algorithm.support.BubbleSort; .U}"ONd9e
import org.rut.util.algorithm.support.HeapSort; +9mE1$C
import org.rut.util.algorithm.support.ImprovedMergeSort; Ja1[vO"YgP
import org.rut.util.algorithm.support.ImprovedQuickSort; ;k1\-
import org.rut.util.algorithm.support.InsertSort; {2jetX`@h
import org.rut.util.algorithm.support.MergeSort; <X@XbM
import org.rut.util.algorithm.support.QuickSort; w7Fz(`\
import org.rut.util.algorithm.support.SelectionSort; uu0"k<Tp
import org.rut.util.algorithm.support.ShellSort; Pnf|9?~$H
udw>{3>
/** : L}Fm2^
* @author treeroot t~_j+k0K#
* @since 2006-2-2 `zf,$67>1
* @version 1.0 2I:x)
*/ %C8p!)Hu
public class SortUtil { (4:&tm/;
public final static int INSERT = 1; ^G:}%4
public final static int BUBBLE = 2; j}P xq
public final static int SELECTION = 3; )v\zaz
public final static int SHELL = 4; M"XILNV-~
public final static int QUICK = 5; DJ&ni`
public final static int IMPROVED_QUICK = 6; 9Q\CJ9
public final static int MERGE = 7; 4wLN#dpeEy
public final static int IMPROVED_MERGE = 8; iYbp^iVg
public final static int HEAP = 9; NMaZ+g!t(
x<&2`=
public static void sort(int[] data) { Std?p{ i
sort(data, IMPROVED_QUICK); FXLY*eRk
} TpnJm%9`)t
private static String[] name={ </xz V<Pi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K|n%8hRy
}; jhRg47A
U(xN}Y?
private static Sort[] impl=new Sort[]{ RLy2d'DS
new InsertSort(), 0}LBnV
new BubbleSort(), q47>RWMh%
new SelectionSort(), !4;A"B(
new ShellSort(), +M )ep\j
new QuickSort(), LWH(bs9U
new ImprovedQuickSort(), Kjw==5)}
new MergeSort(), j?c"BF.
new ImprovedMergeSort(), _LVwjZX[
new HeapSort() &Tc:WD
}; MH wjJ
4o/}KUu(*
public static String toString(int algorithm){ g5",jTn#
return name[algorithm-1]; Z<_"Tk;!',
} ,K/l;M5I
8x)&4o@
public static void sort(int[] data, int algorithm) { $] ])FM"b
impl[algorithm-1].sort(data); =w&bS,a"y
} RSv?imi=
u92);1R
public static interface Sort { IKz3IR eu
public void sort(int[] data); seQSDCsvw*
} 5OJ8o>BF
B=ckRWq
public static void swap(int[] data, int i, int j) { ""~b1kEt
int temp = data; W|2o^ V
data = data[j]; Gy;>.:n
data[j] = temp; ?"hrCEHV{9
} qGlbO
} .Iu8bN(L`