[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; KSuP'.l
} FgNO#%
int i1=l; R*E/E
int i2=mid+1; (zBa2Vmmv
for(int cur=l;cur<=r;cur++){ 9IMtqL&
if(i1==mid+1) 0kpRvdEr-
data[cur]=temp[i2++]; ?)7uwJsH
else if(i2>r) RP7e)?5$s
data[cur]=temp[i1++]; ${KDGJ,^
else if(temp[i1] data[cur]=temp[i1++]; vyERt^z
else d37l/I
data[cur]=temp[i2++]; T%KZV/
} %]>c4"H
} WhSQ>h!@s
0X`Qt[
} u=jF\W9
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改进后的归并排序: $B*Ek>EK
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package org.rut.util.algorithm.support; 1a| q&L`o
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import org.rut.util.algorithm.SortUtil; #,qw~l]
WDSkk"#TF
/** wQ*vcbQX*
* @author treeroot ?@(_GrE-
* @since 2006-2-2 [E2afC>zrl
* @version 1.0 cuBOE2vB.
*/ R"Hhc(H
public class ImprovedMergeSort implements SortUtil.Sort { :+/V
cG,B;kMjo
private static final int THRESHOLD = 10; 1s=M3m&H
K/+5$SjF
/* lOPCM1Se
* (non-Javadoc) @ ILG3"
* y;yXOE_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^T)HRT-k
*/ 7tfMD(Q]e/
public void sort(int[] data) { ly}6zOC\
int[] temp=new int[data.length]; ?2%d;tW
mergeSort(data,temp,0,data.length-1); .Hl]xI$;+
} -B9C2
qWGnIPk
private void mergeSort(int[] data, int[] temp, int l, int r) { n(/(F`
int i, j, k; R(kr@hM
int mid = (l + r) / 2; _,=A\C_b@
if (l == r) @~U: |h
return; 92WvD
if ((mid - l) >= THRESHOLD) :qc@S&v@]
mergeSort(data, temp, l, mid); U GQ{QH
else 8*H-</ =
insertSort(data, l, mid - l + 1); \ZigG{
if ((r - mid) > THRESHOLD) S WVeUL#5
mergeSort(data, temp, mid + 1, r); =2\k Jv3
else nY'0*:'u
insertSort(data, mid + 1, r - mid); 1<fS&)^W
y!6B Gz
for (i = l; i <= mid; i++) { ANc)igo
temp = data; KIC5U50J
} d `>M-:dF
for (j = 1; j <= r - mid; j++) { UQaLhKv:
temp[r - j + 1] = data[j + mid]; ~urIA/
} 2#kR1rJP
int a = temp[l]; dd@^e)VZB
int b = temp[r]; &vLz{
for (i = l, j = r, k = l; k <= r; k++) { ,icgne1j
if (a < b) { mFjX
data[k] = temp[i++]; ,fpu@@2
a = temp; e ,/I}W
} else { u&/q7EBfP
data[k] = temp[j--]; l{>fma]7
b = temp[j]; Uy5IvG;O+
} =zDU!< U
} @JZ I
} ?FVX &{{V
w>p0ldi
/** @vss:'l
* @param data \6-x~%xK
* @param l }tF/ca:XPQ
* @param i -GD_xk
*/ "yCCei,hA?
private void insertSort(int[] data, int start, int len) { TUIj-HSe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bTHKMaGWC
} c$rkbbf~V
} X]U,`oE)9
} Qg"hN
} hF s:9
01g=Cg
堆排序： >N@tInE
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package org.rut.util.algorithm.support; gV$j ]
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import org.rut.util.algorithm.SortUtil; l)[\TD
n1 =B
/** q&Y'zyHLP
* @author treeroot gS_)(
* @since 2006-2-2 vp?87h
* @version 1.0 t 9&xk?%{
*/ ((Ak/qz
public class HeapSort implements SortUtil.Sort{ ;&q}G1
I@+h| n
/* (non-Javadoc) j2c -01}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S_/9eI~X
*/ <`i"5`J
public void sort(int[] data) { 15+>W4v
MaxHeap h=new MaxHeap(); |!E>I
h.init(data); dqnH7okZ
for(int i=0;i h.remove(); y >r7(qg
System.arraycopy(h.queue,1,data,0,data.length); n$ $^(-g@)
} lqn7$
B8UtD
private static class MaxHeap{ veAg?N<c p
C8rD54A'M
void init(int[] data){ I|9(*tq)
this.queue=new int[data.length+1]; HS XS%v/Y
for(int i=0;i queue[++size]=data; -G e5gQ=
fixUp(size); rZ2X$FO@
} FRd!UqMXY
} (+68s9XS7
C93BK)$}
private int size=0; Xf!@uS6<X
NUbw]Y90~
private int[] queue; u~[HC)4(0
?YWfoH4mS
public int get() { ,(dg]7
return queue[1]; bO 2>ced
} ,A`d!{]5
0{^vqh.La
public void remove() { 1rKKph
SortUtil.swap(queue,1,size--); u\wdb^8ds
fixDown(1); T]Z|Wq`bot
} s:3 altv
file://fixdown #"-?+F=rk
private void fixDown(int k) { 5Ds/^fA
int j; I=o[\?u*_
while ((j = k << 1) <= size) { to,DN2rN
if (j < size %26amp;%26amp; queue[j] j++; ("Z;)s4q
if (queue[k]>queue[j]) file://不用交换 4YDK`:4I~
break; ~XN--4%Q
SortUtil.swap(queue,j,k); NAjY,)>'K
k = j; G6(kwv4
} Rt:k4Q
} Yv k Qh{
private void fixUp(int k) { d~F`q7F'?]
while (k > 1) { ^`~M f
int j = k >> 1; _;(`u!@/{
if (queue[j]>queue[k]) ]Q,;5>#W
break; $&~/`MxE
SortUtil.swap(queue,j,k); O4RNt,?l
k = j; ~\kJir
} s7.2EkGl=
} W&CQ87b
<k?ofE1o
} ~,+n_KST;
A}WRpsA9
} _a1 =?
$2B_a
SortUtil： ^ CVhV
xxkUu6x#
package org.rut.util.algorithm; /WlK*8C
nv&uhu/q
import org.rut.util.algorithm.support.BubbleSort; 1{+x >Pv:
import org.rut.util.algorithm.support.HeapSort; g?N~mca$
import org.rut.util.algorithm.support.ImprovedMergeSort; N1,=5P$
import org.rut.util.algorithm.support.ImprovedQuickSort; #=F"PhiX`
import org.rut.util.algorithm.support.InsertSort; uT'_}cw
import org.rut.util.algorithm.support.MergeSort; rE0?R(_
import org.rut.util.algorithm.support.QuickSort; h07Z.q ;
import org.rut.util.algorithm.support.SelectionSort; L1=3_fO
import org.rut.util.algorithm.support.ShellSort; L08>9tf`
Y$xO&\&)
/** jy@vz,/:%5
* @author treeroot D`p&`]k3v
* @since 2006-2-2 ?~~sOf AP
* @version 1.0 !<r+h,C
*/ hoY.2 B_
public class SortUtil { ah<1&UG,
public final static int INSERT = 1; w1HE^ /
public final static int BUBBLE = 2; rt">xVl
public final static int SELECTION = 3; 7pMl:\
public final static int SHELL = 4; 3 i<,#FaL
public final static int QUICK = 5; ?xEQ'(UBQ
public final static int IMPROVED_QUICK = 6; /~3~Xc~=p
public final static int MERGE = 7; (Mi]vK.4
public final static int IMPROVED_MERGE = 8; Y.` {]rC
public final static int HEAP = 9; Y<|!)JLB2
S\fEV"
public static void sort(int[] data) { 3sG7G:4
sort(data, IMPROVED_QUICK); aEUC
} Fe 3*pUt
private static String[] name={ jv$Y]nf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RtVy^~=G
}; r/v'h@
<;O=h; ~|
private static Sort[] impl=new Sort[]{ C yg e
new InsertSort(), #oRm-yDr
new BubbleSort(), )E;+C2G
new SelectionSort(), zogtIn)
new ShellSort(), Ow7NOhw
new QuickSort(), RC7|@a
new ImprovedQuickSort(), *Q2;bmIc
new MergeSort(), C!Cg.^;
new ImprovedMergeSort(), 9~+A<X]Hd
new HeapSort() 7sP;+G
}; O7@CAr
Eu/~4:XN
public static String toString(int algorithm){ 6k6M&a
return name[algorithm-1]; / hUuQDJ
} 5G.Fi21 b
Bz}Dgbb
public static void sort(int[] data, int algorithm) { fw>@:m_bK
impl[algorithm-1].sort(data); !iKR~&UpAL
} u] C/RDTH
TymE(,1
public static interface Sort { hUirvDvX
public void sort(int[] data); q6A!xQs<
} 9pPb]v,6
p- 5)J&
public static void swap(int[] data, int i, int j) { {\-rZb==F2
int temp = data; !NWz
data = data[j]; B;9"=0
data[j] = temp; H /Idc,*
} IV{,'+hT
} y*2R#jTA