[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; $1FnjL5u
} BC5R$W.e
int i1=l; OdOn wY
int i2=mid+1; /([a%,DI
for(int cur=l;cur<=r;cur++){ v4K! BW
if(i1==mid+1) WM%w_,Z
data[cur]=temp[i2++]; mi1^hl'2
else if(i2>r) $KhD>4^jL
data[cur]=temp[i1++]; [E+J=L.l
else if(temp[i1] data[cur]=temp[i1++]; &-!$qUli
else ,M:[GuXD<
data[cur]=temp[i2++]; NV==[$(r
} Uw| -d[!
} b|*+!v:I>T
aPRMpY-YC3
} i/Nc)kKL
KE~.f(
改进后的归并排序: D2J)qCK1)
C^c<s
package org.rut.util.algorithm.support; RR|X4h0.
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import org.rut.util.algorithm.SortUtil; QpA$='
=A~5?J=
/** 8kC$Z)
* @author treeroot _~'MQ`P
* @since 2006-2-2 H?FiZy*[Y
* @version 1.0 n]7rHV}G
*/ DMTc{
public class ImprovedMergeSort implements SortUtil.Sort { =$%-RX7
v V;]?
private static final int THRESHOLD = 10; ^6b5}{>
-d thY(8
/* h6bvUI+|h
* (non-Javadoc) "a(e2H2&T4
* eCWF0a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F+?i{$
*/ XfflD9M
public void sort(int[] data) { &g>MZ"Z|
int[] temp=new int[data.length]; cP4C<UG
mergeSort(data,temp,0,data.length-1); m2/S(f
} Udf\;G@
Efoy]6P\
private void mergeSort(int[] data, int[] temp, int l, int r) { 0d+b<J,
int i, j, k; 4.Fh4Y:$'
int mid = (l + r) / 2; /sn }Q-Zy2
if (l == r) mY[*Cj3WJ
return; atW^^4:
if ((mid - l) >= THRESHOLD) t~)4f.F:
mergeSort(data, temp, l, mid); df {\O*6
else Ujqnl>l
insertSort(data, l, mid - l + 1); /Dyig
if ((r - mid) > THRESHOLD) \Ui8gDJ8y5
mergeSort(data, temp, mid + 1, r); )T?BO
else OH@gwC
insertSort(data, mid + 1, r - mid); 2Nx:Y+[
9P,[MZ
for (i = l; i <= mid; i++) { _zzT[}
temp = data; 6`%|-o :
} 2Dt^W.!
for (j = 1; j <= r - mid; j++) { N"tX K
temp[r - j + 1] = data[j + mid]; DZ4gp
} 9Y2.ob!$}
int a = temp[l]; D=Nt0y
int b = temp[r]; .mg0L\
for (i = l, j = r, k = l; k <= r; k++) { P)XR9&o':
if (a < b) { S4c-i2Rq
data[k] = temp[i++]; i3KAJ@
a = temp; U#- 5",X|
} else { S6\E I5S
data[k] = temp[j--]; $=#Lf[|f=
b = temp[j]; m-a':
} 1f1D^|
} IwS<p-
} h?h)i>
q&O9W?E8dG
/** !)CY\c4}d>
* @param data f3^qO9R
* @param l U>00B|<GJ
* @param i kGC*\?<LmR
*/ ^CM@VmPp
private void insertSort(int[] data, int start, int len) { M,yxPHlN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pAqPHD=
} O*lIZ,!n
} b6H7>x
} ?R4u>AHS@
} ,\1Rf.
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堆排序： '66nqJb*
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package org.rut.util.algorithm.support; Cs,Cb2[
_VM}]A
import org.rut.util.algorithm.SortUtil; ;49sou
h,-i\8gq
/** #Ye0*`
* @author treeroot p&0 G
* @since 2006-2-2 .wTb/x
* @version 1.0 gNZ"Kr o6
*/ `Fe/=]<$
public class HeapSort implements SortUtil.Sort{ Os]. IL$
44w "U%+
/* (non-Javadoc) ;%i-:<ac
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0LP0q9S:9
*/ EP<{3fy
public void sort(int[] data) { ?B)e8i<[f
MaxHeap h=new MaxHeap(); %&lwp
h.init(data); QNv5CQ&
for(int i=0;i h.remove(); PI9aKNt
System.arraycopy(h.queue,1,data,0,data.length); wr(*RI"
} O<mA+yk
C OL"/3r
private static class MaxHeap{ Fi7~JZZ
*lu*h&Y
void init(int[] data){ O*N:.|dUw
this.queue=new int[data.length+1]; 1W-kZ(e
for(int i=0;i queue[++size]=data; Lpnw(r9Y
fixUp(size); }5z!FXB
} "4T36b
} s<:);-tL
33a}M;vx
private int size=0; y5D3zqCG
JDp=w,7LF
private int[] queue; 0R0_UvsXU
n$h+_xN
public int get() { $GQEdVSNo
return queue[1]; - K"L6m|
} .b!HEi<F
ti]8_vP}*
public void remove() { teLZplC=f
SortUtil.swap(queue,1,size--); {K|ds($ 5
fixDown(1); +# !?+'A
} BLt_(S?Z`
file://fixdown (JE&1 @
private void fixDown(int k) { usu{1&g
int j; q[Ey!h)xq
while ((j = k << 1) <= size) { zWhzU|=8
if (j < size %26amp;%26amp; queue[j] j++; aW;)-0+
if (queue[k]>queue[j]) file://不用交换 t-iQaobF
break; }dqOE-"I"n
SortUtil.swap(queue,j,k); .vIRz-S
k = j; &$#NV@
} =i2]qj\
} '%rn-|)
private void fixUp(int k) { e(OKE7
while (k > 1) { .lI.I
int j = k >> 1; nJ1<8 p
if (queue[j]>queue[k]) F4~O-g.<
break; h CV(O2jL
SortUtil.swap(queue,j,k); p_fsEY
k = j; LJ9#!r@H
} =+<DNW@%
} Wh"xt:
OMab!
} V,\}|_GY
OU^I/TU
} &sXk!!85:
D$D;'Kij
SortUtil： Pp4Q)2X
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package org.rut.util.algorithm; `d x.<R#,
qjf4G[]!
import org.rut.util.algorithm.support.BubbleSort; O -p^S
import org.rut.util.algorithm.support.HeapSort; <K/iX%b?
import org.rut.util.algorithm.support.ImprovedMergeSort; WS1Y maV
import org.rut.util.algorithm.support.ImprovedQuickSort; V.yDZ"
import org.rut.util.algorithm.support.InsertSort; nn">
import org.rut.util.algorithm.support.MergeSort; `Cy;/95m
import org.rut.util.algorithm.support.QuickSort; [s%uE+``S
import org.rut.util.algorithm.support.SelectionSort; g(S4i%\
import org.rut.util.algorithm.support.ShellSort; l~@ -oE
m (kKUv
/** JiXN"s^mcb
* @author treeroot =~dXP
* @since 2006-2-2 q^QLNKOH"
* @version 1.0 (8~Hr?1B
*/ 3#F"UG2,_
public class SortUtil { / =v1.9(
public final static int INSERT = 1; + eZn
public final static int BUBBLE = 2; I=YZ!*f/`
public final static int SELECTION = 3; $UdFm8&
public final static int SHELL = 4; 7L]Y.7>
public final static int QUICK = 5; ^5FwYXAxi
public final static int IMPROVED_QUICK = 6; :/fT8KCwo
public final static int MERGE = 7; Ro2!$[P
public final static int IMPROVED_MERGE = 8; =trLL+vGw'
public final static int HEAP = 9; fCv.$5
-9s&OKo`({
public static void sort(int[] data) { w (ev=)7<
sort(data, IMPROVED_QUICK); nQfSQMg
} _Pl5?5eZj
private static String[] name={ M=EV^Tw-=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Of<Vr.m{R
}; A2`Xh#o
<bywi2]z
private static Sort[] impl=new Sort[]{ ;M*G
new InsertSort(), 1ZWr@,\L
new BubbleSort(), :ee'|c
new SelectionSort(), S9qc34\^=
new ShellSort(), ~(^?M
new QuickSort(), O tR
new ImprovedQuickSort(), T{F 'Y%
new MergeSort(), 3nUC,T%
new ImprovedMergeSort(), r+h$]OJ
new HeapSort() &>}f\ch/
}; y"w`yl{_
9tCF m.m
public static String toString(int algorithm){ b X/%Q^Y
return name[algorithm-1]; 4L&Rs;
} =~k#<q1^
TO] cZZ<
public static void sort(int[] data, int algorithm) { ;\Pq
impl[algorithm-1].sort(data); Z. xOO|
} j3/K;U/SGJ
"z{rC}
public static interface Sort { KU.F4I8}q
public void sort(int[] data); w?R#ly
} aR%E"P-6l
QY1|:(
public static void swap(int[] data, int i, int j) { "^VPe[lA
int temp = data; (<Kf
data = data[j]; q]P$NeEiZ"
data[j] = temp; uCf _O~
} *p^*>~i9)
} K|rG&#1J