[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; s>"WQ|;6
} <)0LwkFtB
int i1=l; 4^jZv$l5
int i2=mid+1; O7L6Htya
for(int cur=l;cur<=r;cur++){ XQJV.SVS
if(i1==mid+1) =^".{h'-
data[cur]=temp[i2++]; ^HU=E@
else if(i2>r) m-pIFL<^N
data[cur]=temp[i1++]; # 8-P
else if(temp[i1] data[cur]=temp[i1++]; 6=[ PJM
else KlSY^(kHR
data[cur]=temp[i2++]; swe8
} @%5F^Vbd
} @)M.u3{\
%Tm'aY"
} X~/9Vd g
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改进后的归并排序: [;kj,j
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package org.rut.util.algorithm.support; R.n`R|NOd
5Dh&ez`oR'
import org.rut.util.algorithm.SortUtil; nG(|7x
"}azC|:5
/** R}=]UOqH-
* @author treeroot n$\6}\k
* @since 2006-2-2 KcMzZ!d7m
* @version 1.0 B1AF4}~5
*/ RAXJsF^5o
public class ImprovedMergeSort implements SortUtil.Sort { {3yws4
RWEgUDX^/
private static final int THRESHOLD = 10; :fMM-?s]
W0C$*oe!_i
/* ^LAS9K1.
* (non-Javadoc) &opH\wa
* )F9V=PJE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uma9yIk
*/ t3h \.(mq
public void sort(int[] data) { !un"XI0`t<
int[] temp=new int[data.length]; hJtghG6v
mergeSort(data,temp,0,data.length-1); epm8N /
} E<.{ v\
JjL0/&
private void mergeSort(int[] data, int[] temp, int l, int r) { ,\">ovV33
int i, j, k; k?_$h<Y
int mid = (l + r) / 2; R|^t~h-
if (l == r) UW~tS
return; A UO0
if ((mid - l) >= THRESHOLD) 9cHNwgD>v
mergeSort(data, temp, l, mid); Y{\2wU!Isn
else Vt 5XC~jK
insertSort(data, l, mid - l + 1); m:o$|7r
if ((r - mid) > THRESHOLD) aG&kl O>m
mergeSort(data, temp, mid + 1, r); Z_TbM^N
else @eD2<e
insertSort(data, mid + 1, r - mid); W71#NjM2Z
;R-Q,aCM}
for (i = l; i <= mid; i++) { u=?P*Y/|W
temp = data; X$Qi[=L
} vzQmijr-
for (j = 1; j <= r - mid; j++) { Ffqn|}gb
temp[r - j + 1] = data[j + mid]; vskM;
} 'Y/V9;`)s
int a = temp[l]; @C6DOB
int b = temp[r]; &qj&WfrB,
for (i = l, j = r, k = l; k <= r; k++) { b+fy&rk@-
if (a < b) { >Sl:Z ,g;
data[k] = temp[i++]; Sv[_BP\^h
a = temp; XcW3IO
} else { 7.=s1~p
data[k] = temp[j--]; "B{xC}Tw
b = temp[j]; P) 0=@{(
} (:hmp"S
} KLM^O$=
} F_ lj>;}a5
U8@*I>vA
/** tw^.(m5d
* @param data A-NC,3
* @param l \y+F!;IxL
* @param i BB}iBf I'
*/ EwJn1Mvq
private void insertSort(int[] data, int start, int len) { ; yC`5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Le+8s LE`Y
} uTFEI.N
} &S`'o%B
} sjbC~Te--
} YRX2^v ^[
#hiDZ>nr
堆排序： %y~]3XWik
h.0&)t\q"
package org.rut.util.algorithm.support; 0hr)tYW,G
&Fr68HNmj
import org.rut.util.algorithm.SortUtil; fXR_)d
)=y6s^}
/** |Szr=[
* @author treeroot ~.=HN}E
* @since 2006-2-2 oEf^o*5(
* @version 1.0 $XzlW=3y
*/ Qpu2RfP
public class HeapSort implements SortUtil.Sort{ {@`Uf;hPAX
=*G'.D /*
/* (non-Javadoc) <{~UKi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ho*RLVI0U
*/ Aba%Gh
public void sort(int[] data) { \{^yB4F_Z
MaxHeap h=new MaxHeap(); ?DTP-#5Ba
h.init(data); `RLrT34
for(int i=0;i h.remove(); B$eF@v"
System.arraycopy(h.queue,1,data,0,data.length); Al;oI3
} G~j<I/)"
omU)hFvyS
private static class MaxHeap{ m.X+sP-e
L{ ^@O0S
void init(int[] data){ }Bg<Fm
this.queue=new int[data.length+1]; n]g,)m
for(int i=0;i queue[++size]=data; i2c<q0u
fixUp(size); 8?R_O}U
} Uv$u\D+@[
} Oc3%pb;
FK('E3PG
private int size=0; tAn6pGp
AMiFsgBj
private int[] queue; %HS!^j3C%
_\6(4a`,
public int get() { M?CMN.Dw
return queue[1]; ph+tk5k
} tOVm~C,R
0(6`dr_
public void remove() { QAw,XZ.K^
SortUtil.swap(queue,1,size--); lt"*y.%@b
fixDown(1); [l{eJ/W
} r\D8_S_
file://fixdown :cz]8~i\
private void fixDown(int k) { )}lV41u
int j; NGzqiu"J
while ((j = k << 1) <= size) { O/~^}8TLL
if (j < size %26amp;%26amp; queue[j] j++; .OUE'5e p
if (queue[k]>queue[j]) file://不用交换 )eyxAg
break; >gl<$LQ?X
SortUtil.swap(queue,j,k); t9l7 % +y
k = j; VAzJclB
} i`spM<iR.
} bME3" e{O
private void fixUp(int k) { S?tLIi/
while (k > 1) { !d)i6W?
int j = k >> 1; {bEEQCweNJ
if (queue[j]>queue[k]) gWPa8q<b
break; "xI[4~'`:
SortUtil.swap(queue,j,k); ,6L>f.V^(U
k = j; |Q;1;QXd
} bS6Yi)p
} s]>%_(5
TD9`SSpP
} xUoY|$fI
Sa~C#[V
} (o\~2e:
)T_#X!
SortUtil： A4x3TW?
)UUe5H6Hd0
package org.rut.util.algorithm; r/f;\w7
z$b!J$A1
import org.rut.util.algorithm.support.BubbleSort; CxV%/ChJ#
import org.rut.util.algorithm.support.HeapSort; Z;s-t\C
import org.rut.util.algorithm.support.ImprovedMergeSort; g&wQ^
import org.rut.util.algorithm.support.ImprovedQuickSort; v,B\+q/
import org.rut.util.algorithm.support.InsertSort; _Y=yR2O
import org.rut.util.algorithm.support.MergeSort; mAa]Et.
import org.rut.util.algorithm.support.QuickSort; kMXl {
import org.rut.util.algorithm.support.SelectionSort; s9>!^MzBK
import org.rut.util.algorithm.support.ShellSort; ]^<~[QK_C
W@=ilW3RD
/** tT:yvU@a
* @author treeroot U @|_5[nl
* @since 2006-2-2 jyr#e
* @version 1.0 .IU+4ENSy4
*/ ]={Hq9d@
public class SortUtil { cGKk2'v?
public final static int INSERT = 1; 4N&}hOM'S
public final static int BUBBLE = 2; ?CDq^)T[
public final static int SELECTION = 3; q4oZJ-`
public final static int SHELL = 4; ,,gYU_V
public final static int QUICK = 5; !NjE5USi
public final static int IMPROVED_QUICK = 6; 5c8x: e@
public final static int MERGE = 7; Q!v[b{]8
public final static int IMPROVED_MERGE = 8; H2vEFnV
public final static int HEAP = 9; o5uwa{v
KMcP!N.I
public static void sort(int[] data) { |zKcL3*
sort(data, IMPROVED_QUICK); g~b'}^J
} tHeLq*))
private static String[] name={ >wwEa4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5JXLfYTUI
}; (WvA9s{/
aT#|mk=\
private static Sort[] impl=new Sort[]{ 0M?}S~p]
new InsertSort(), dGe
new BubbleSort(), CS49M
new SelectionSort(), \mloR '
new ShellSort(), KMZ`Wn=
new QuickSort(), rf@81Ds
new ImprovedQuickSort(), v]~[~\|a
new MergeSort(), [qB=OxH?
new ImprovedMergeSort(), @$]h[
new HeapSort() S8l+WF4q
}; M;R>]wP"V
Tx_LH"8
public static String toString(int algorithm){ R0[Gfq9M=
return name[algorithm-1]; oLoa71Q}
} 0P42C{>'w
5]E5V@C
public static void sort(int[] data, int algorithm) { ?$Pj[O^hl
impl[algorithm-1].sort(data); ~m7+^c@,
} vNIQc "\-
26A#X
public static interface Sort { R#>E{[9
public void sort(int[] data); "5Mo%cUp
} |wx1 [xZ
[Wc 73-
public static void swap(int[] data, int i, int j) { Alz#zBGb
int temp = data; ff0,K#-
data = data[j]; syF/jWM5
data[j] = temp; (!s[~O6
} jk@]d5
} i{2KMa{K