[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; y-vQ4G5F|
} Te@=8-u-
int i1=l; rNeSg=j
int i2=mid+1; wsAijHjJI!
for(int cur=l;cur<=r;cur++){ N>',[4pJ|
if(i1==mid+1) 6adXE
data[cur]=temp[i2++]; rM)-$dZ
else if(i2>r) tkf^sGgNO
data[cur]=temp[i1++]; *Zz hN]1
else if(temp[i1] data[cur]=temp[i1++]; LAv!s/O$=
else FoGSCg%
data[cur]=temp[i2++]; S3&lkN5
} l5l#LsaQb
} wj|[a,(r
6F08$,%Y
} <jtu/U]78|
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改进后的归并排序: +{@hD+
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package org.rut.util.algorithm.support; 1n EW'F
~\[\S!"
import org.rut.util.algorithm.SortUtil; Dt]*M_
2[Vs@X
/** ^26}8vt
* @author treeroot btv.M
* @since 2006-2-2 v>p}f"$`
* @version 1.0 17@#"uT0
*/ 5/4q}U3
public class ImprovedMergeSort implements SortUtil.Sort { *)um^O
QHbjZJ N
private static final int THRESHOLD = 10; AOR(1Qyo
p$zj2W+sN
/* S'%!KGVe
* (non-Javadoc) R^tDL
* VT5o#NR{R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cA25FD
*/ c_)lTI4
public void sort(int[] data) { w$z]Z-
int[] temp=new int[data.length]; L(\o66a-rV
mergeSort(data,temp,0,data.length-1); KPB^>,T2{
} av4g/7=
{igVuZ(>en
private void mergeSort(int[] data, int[] temp, int l, int r) { [E4#|w
int i, j, k; 3NxwQ,~
int mid = (l + r) / 2; VXIB9 /*i
if (l == r) i8>^{GODR
return; 6@cT;=W;xj
if ((mid - l) >= THRESHOLD) 0Nq6>^ %
mergeSort(data, temp, l, mid); tU, >EbwO
else 9{XC9\~
insertSort(data, l, mid - l + 1); pTIE.:g(
if ((r - mid) > THRESHOLD) ,5/zTLd
mergeSort(data, temp, mid + 1, r); mybvD
else ^V;2v? O
insertSort(data, mid + 1, r - mid); }@avGt;v
}^}ep2^
for (i = l; i <= mid; i++) { Jevr.&;O
temp = data; K9+%rqC.|`
} +6+!M_0wA
for (j = 1; j <= r - mid; j++) { _!?iiO
temp[r - j + 1] = data[j + mid]; ucgp=bye
} j3)fmlA
int a = temp[l]; UsBtk
int b = temp[r]; j5]6CG_
for (i = l, j = r, k = l; k <= r; k++) { l[Rl:k!
if (a < b) { 0ntf%#2{
data[k] = temp[i++]; = ,^eQZR:
a = temp; T{Y;-m
} else { @>SirYh
data[k] = temp[j--]; o@blvW<v7
b = temp[j]; CJ#1j>
} ^E`SR6_cmj
} |XoW Z,K
} fC^POLn[f
!;~6nYY
/** ={gfx;
* @param data L>1i~c&V
* @param l B|(MxR6m
* @param i cR"?EQ] `N
*/ wSd o7Lb
private void insertSort(int[] data, int start, int len) { QocR)aN=+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Qg' {RAV8
} (2fWJ%7VG
} Rw#4 |&
} c2d=dGP>~f
} Hj^_Cp]@*
y7WO:X&
堆排序： Aq:1
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package org.rut.util.algorithm.support; D4e!A@LJ
<u%&@G$F>
import org.rut.util.algorithm.SortUtil; f=/IwMpn
)Me$BK>
/** TSHQ>kP
* @author treeroot 1Xj>kE:
* @since 2006-2-2 *aT\V64
* @version 1.0 )mF;^3
*/ vS_Ji<W~E
public class HeapSort implements SortUtil.Sort{ v"N%w1`.e
qL?`l;+
/* (non-Javadoc) |H7f@b]Sk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uDXRw*rTv
*/ %an&lcoX
public void sort(int[] data) { N% W298
MaxHeap h=new MaxHeap(); Uc<j{U ,
h.init(data); S eTn]
for(int i=0;i h.remove(); "[t (u/e
System.arraycopy(h.queue,1,data,0,data.length); (c=.?{U
} }:2GD0Ru
rS^+y{7
private static class MaxHeap{ ]E!b&
/a:sWmxMT
void init(int[] data){ sp'f>F2]
this.queue=new int[data.length+1]; d iGkwKj
for(int i=0;i queue[++size]=data; jdWA)N}kDG
fixUp(size); dZ"w2ho
} ROc)LCA
} z.%K5vrO>
^a+H`RD
private int size=0; s8 c#_
WY 'QhieH
private int[] queue; F.[E;gOTo
q"O4}4`
public int get() { zEYT,l
return queue[1]; mxQPOu
} >^5UXQr
Bc^MZ~+ip
public void remove() { JNZ O7s
SortUtil.swap(queue,1,size--); mM6X0aM
fixDown(1); f7_EqS=(
} E+$%88
file://fixdown PA_54a9/<
private void fixDown(int k) { 7_*k<W7|
int j; ]> dCt<
while ((j = k << 1) <= size) { SZ'2/#R>
if (j < size %26amp;%26amp; queue[j] j++; N=[# "4I
if (queue[k]>queue[j]) file://不用交换 6mAaFDI,R
break; +P5\N,,7R
SortUtil.swap(queue,j,k); %SHgXd#X
k = j; v62M8r,Y
} dNg5#?mzT5
} ap y#8]
private void fixUp(int k) { XD=p:Ezh
while (k > 1) { 'l7ey3B%
int j = k >> 1; 4gkaCk{]
if (queue[j]>queue[k]) U.,_zEbx,
break; 6< T@\E
SortUtil.swap(queue,j,k); +i0j3.
k = j; ;VI/iwg
} mufJ@YS#
} `: R7jf
7I0[Ii
} Z>t,B%v
)EhRqX9
} P^Tk4_,0
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SortUtil： vl,Ff9
3{*nG'@Mal
package org.rut.util.algorithm; Q eZg l!
TyG;BF|rwk
import org.rut.util.algorithm.support.BubbleSort; jf WZLb)
import org.rut.util.algorithm.support.HeapSort; ;[,r./XmH
import org.rut.util.algorithm.support.ImprovedMergeSort; f+xhS,iDR
import org.rut.util.algorithm.support.ImprovedQuickSort; T4lE-g2%M
import org.rut.util.algorithm.support.InsertSort; <T|?`;K
import org.rut.util.algorithm.support.MergeSort; W#@Mx
import org.rut.util.algorithm.support.QuickSort; V9dJNt'Ui
import org.rut.util.algorithm.support.SelectionSort; 41Nm+$m
import org.rut.util.algorithm.support.ShellSort; zD z"Dn9
;?K>dWf3f
/** }S,KUH.
* @author treeroot 2QN ~E
* @since 2006-2-2 "1iLfQ
* @version 1.0 zZ*\v
*/ ^0fe:ac;
public class SortUtil { Y$\c_#/]
public final static int INSERT = 1; RP1sQ6$
public final static int BUBBLE = 2; [42EqVR
public final static int SELECTION = 3; $YztLcn
public final static int SHELL = 4; r-aCa/4y!
public final static int QUICK = 5; $(=0J*ND"
public final static int IMPROVED_QUICK = 6; 8EBy5X}US
public final static int MERGE = 7; 7q;wj~
public final static int IMPROVED_MERGE = 8; \zMx~-2oN
public final static int HEAP = 9; _Q=h3(ZI
w$1B|7tX;2
public static void sort(int[] data) { Ht_7:5v&
sort(data, IMPROVED_QUICK); |JVp(Kx
} #P)(/>nF
private static String[] name={ u P&<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Mr6q7
}; l?Qbwv}
^|j @' @L
private static Sort[] impl=new Sort[]{ *<"#1H/q
new InsertSort(), GJo`9
new BubbleSort(), oT}-i [=}
new SelectionSort(), wk[4Qsk<
new ShellSort(), hqwDlapTt
new QuickSort(), ?Fp2W+M j
new ImprovedQuickSort(), ?Zv>4+Y'
new MergeSort(), ["7]EW\!:
new ImprovedMergeSort(), >)6d~
new HeapSort() id:6O+\
}; iR39lOr
\>N"{T
public static String toString(int algorithm){ L2}p<?f
return name[algorithm-1]; V|`w/P9g4
} 2Cgq&\wS
NS3qNj
public static void sort(int[] data, int algorithm) { 1kdQh&~G
impl[algorithm-1].sort(data); tYST&5Kh~
} |Zm'!-_
JuM4Njz|
public static interface Sort { O;CC(
public void sort(int[] data); 4E 32DG*
} <C{uodFll
mVVL[z2+
public static void swap(int[] data, int i, int j) { sOb=+u$$9
int temp = data; m(rd\3d
data = data[j]; Cak-J~=
data[j] = temp; Q35jJQ$<`
} \s^4f#
} jk9/EmV*r