[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; JX2@i8[~
} nCdxn#|
int i1=l; J+f*D+x1
int i2=mid+1; p7]V1w:
for(int cur=l;cur<=r;cur++){ 5c6?$v/
if(i1==mid+1) ,&rHBNS
data[cur]=temp[i2++]; hH=}<@z
else if(i2>r) \WZ]'o6
data[cur]=temp[i1++]; MI|anM
else if(temp[i1] data[cur]=temp[i1++]; 7G &I]>
else U<.,"`=l
data[cur]=temp[i2++]; rI;tMNs
} y[I)hSD=
} hd_<J]C
vFl06N2
} 61&A`
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改进后的归并排序: {|/y/xYgy'
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package org.rut.util.algorithm.support; M}xyW"yp
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import org.rut.util.algorithm.SortUtil; <~-cp61z;
)XoIb[s"
/** VL| q`n
* @author treeroot ynU20g
* @since 2006-2-2 /}#@uC
* @version 1.0 {K42PmQL
*/ S[I-Z_S
public class ImprovedMergeSort implements SortUtil.Sort { nx'Yevi0$
xjg(}w
private static final int THRESHOLD = 10; !t!\b9=
31k2X81;a
/* _!Ir|j.A
* (non-Javadoc) -5sKJt]+i
* b*W01ist
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <5:`tC2
*/ Mib<1ZM
public void sort(int[] data) { }q D0-
int[] temp=new int[data.length]; aXRf6:\%
mergeSort(data,temp,0,data.length-1); }+ZZO0
} GR>kxYM%q
VDy\2-b8d
private void mergeSort(int[] data, int[] temp, int l, int r) { BoHpfx1C
int i, j, k; |++\"g
int mid = (l + r) / 2; x{#W84
if (l == r) ,7mB`0j>
return; 7dtkylW
if ((mid - l) >= THRESHOLD) s\3OqJo%)
mergeSort(data, temp, l, mid); yHjuT+/wM,
else |.Vs(0O
insertSort(data, l, mid - l + 1); o2e gNTG
if ((r - mid) > THRESHOLD) mB<*we
mergeSort(data, temp, mid + 1, r); (hFyp}jkk
else P1IL]
insertSort(data, mid + 1, r - mid); ~3,k8C"pRq
.}ePm(
for (i = l; i <= mid; i++) { 'jj|bN
temp = data; t?;\'
} [ F7ru4"{
for (j = 1; j <= r - mid; j++) { '4]_~?&x
temp[r - j + 1] = data[j + mid]; <%GfF![v
} l#cG#-
int a = temp[l]; \zx$]|AQ
int b = temp[r]; K4K]oT
for (i = l, j = r, k = l; k <= r; k++) { cPbAR'
if (a < b) { QP:|D_k
data[k] = temp[i++]; "1|\V.>>;
a = temp; %E*Q0/
} else { tv'=xDCp
data[k] = temp[j--]; Ge+T[
b = temp[j]; f S-PM3
} ^g N/5
} ;<N%D=;}@
} \_l4li
bd)'1;p
/** +\)a p
* @param data @M&qH[tK-A
* @param l p4^&G/'
* @param i +Hkr\
*/ r}i}4K[1
private void insertSort(int[] data, int start, int len) { S:8 WBY]M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fOJTy0jX8
} k<}3_
} !yo@i_1D
} rBUWzpE"
} }BI|M_q.1~
*"Uf|
堆排序： l?)!^}Qc
UAe8Ct=YJ
package org.rut.util.algorithm.support; +sT S1t
EFn[[<&><t
import org.rut.util.algorithm.SortUtil; P"%f8C~r
o1Nfn'!3/>
/** J>8kJCh9g
* @author treeroot %WlTx&jSgE
* @since 2006-2-2 ;b_l/T(
* @version 1.0 nZ %%{#T7
*/ gfJHB3@
public class HeapSort implements SortUtil.Sort{ ]\m>N]P]
"/nbcQ*s*E
/* (non-Javadoc) YF)k0bu&;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qNi`OVh&
*/ J#xZ.6)
public void sort(int[] data) { %U6A"?To
MaxHeap h=new MaxHeap(); E<sd\~~A:
h.init(data); WS//0
for(int i=0;i h.remove(); 6{!Cx9V
System.arraycopy(h.queue,1,data,0,data.length); $i@I|y/
} {"c`k4R
Vw]!Kb7tA
private static class MaxHeap{ o3JSh=
_p^$.\k"
void init(int[] data){ L%jIU<?Z7
this.queue=new int[data.length+1]; a:Nf+t
for(int i=0;i queue[++size]=data; IG&twJR
fixUp(size); AQwai>eL
} iDWM-Ytx
} $plqk^P
%,(X R`
private int size=0; ow{J;vFy\
0Wj,=9q
private int[] queue; 2Z>8ROv^X
_L+j6N.h1
public int get() { zx5#eMD
return queue[1]; (67byO{
} X;n09 L`CB
+)LCYDRV7
public void remove() { 09qfnQG
SortUtil.swap(queue,1,size--); -^3uQa<zN^
fixDown(1); ,^RZ1tLz
} IhRdn1&
file://fixdown 6-z(34&N
private void fixDown(int k) { )-0+O=v
int j; 8@Bm2?$}g
while ((j = k << 1) <= size) { " sC]z}
if (j < size %26amp;%26amp; queue[j] j++; v*OV\h.
if (queue[k]>queue[j]) file://不用交换 =R<92v
break; J/IRCjQ}
SortUtil.swap(queue,j,k); C^;>HAK|F
k = j; $01csj
} NcBz("
} 'E&tEbY
private void fixUp(int k) { S+"Bq:u"
while (k > 1) { E]v?:!!ds
int j = k >> 1; ,}O33BwJp
if (queue[j]>queue[k]) Si@6'sw
break; Wm}gnNwA
SortUtil.swap(queue,j,k); w3z'ZCcr;"
k = j; I{h KN V
} Q :.i[
} bYoBJ #UX
p8 Ao{
} ?4oP=.
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} S}a]Bt
plp-[eKcD
SortUtil： 2W2T
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package org.rut.util.algorithm; )ki Gk}2
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import org.rut.util.algorithm.support.BubbleSort; }%z%}V@(&
import org.rut.util.algorithm.support.HeapSort; z1]nC]2
import org.rut.util.algorithm.support.ImprovedMergeSort; QM* T?PR
import org.rut.util.algorithm.support.ImprovedQuickSort; "}wO<O6[
import org.rut.util.algorithm.support.InsertSort; .rITzwgB
import org.rut.util.algorithm.support.MergeSort; DVVyWn[
import org.rut.util.algorithm.support.QuickSort; hO&_VCk
import org.rut.util.algorithm.support.SelectionSort; CmV &+C$V%
import org.rut.util.algorithm.support.ShellSort; G|[{\
]Vmo>
/** ];lZ:gT
* @author treeroot M9afg$;.xe
* @since 2006-2-2 JXMH7
* @version 1.0 zj(V\y&H
*/ %1$#fxR
public class SortUtil { T=)qD2?
public final static int INSERT = 1; 0#DEh|?
public final static int BUBBLE = 2; UfPHV%Wd
public final static int SELECTION = 3; Fi67"*gE
public final static int SHELL = 4; ;g? |y(xv
public final static int QUICK = 5; &^#u=w?^x
public final static int IMPROVED_QUICK = 6; 'A^q)hpax
public final static int MERGE = 7; 3z(4axH'
public final static int IMPROVED_MERGE = 8; jz![#-G
public final static int HEAP = 9; yi*EobP
amdgb,vh
public static void sort(int[] data) { ~bCA8
sort(data, IMPROVED_QUICK); %T\hL\L?
} }{VOyPG
private static String[] name={ D4,>g )B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kaXq.
}; QF\nf_X
q[C?1Kc.z
private static Sort[] impl=new Sort[]{ &e@)yVLL
new InsertSort(), AB`.K{h
new BubbleSort(), Qj;{Z*l%+
new SelectionSort(), ,aLwOmO
new ShellSort(), aY#?QjL
new QuickSort(), 1kKfFpN
new ImprovedQuickSort(), _1&Ar4:
new MergeSort(), xE w\'tH
new ImprovedMergeSort(), 4|E^ #C
new HeapSort() uBa<5YDF
}; R-j*fO}
Jp_#pV*}:
public static String toString(int algorithm){ >>,G3/Zd*
return name[algorithm-1]; GaG>0x
} [GI~ &
Xs2 jR14`
public static void sort(int[] data, int algorithm) { 0Zi+x#&d
impl[algorithm-1].sort(data); |DJ8 "T]E
} t+iHsCG)>
1QG q;6\
public static interface Sort { @)uV Fw"\
public void sort(int[] data); ?nGiif
} 8zD>t~N2C
f4b9o[,s2e
public static void swap(int[] data, int i, int j) { gK`w|kh`
int temp = data; qrYbc~jI7
data = data[j]; dY S(}U
data[j] = temp; e))L&s
} hc[ K VLpS
} .{h"0<x