[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; h1 pEC
} iR]K!j2
int i1=l; dpSNh1
int i2=mid+1; }WDzzjDR+
for(int cur=l;cur<=r;cur++){ x>$e*
if(i1==mid+1) ]+A%37
data[cur]=temp[i2++]; 7-#
else if(i2>r) +FJ+,|i
data[cur]=temp[i1++]; R,dbq4xkl
else if(temp[i1] data[cur]=temp[i1++]; 9wbj}tN\z
else fs\A(]`$
data[cur]=temp[i2++]; dTZ$92<
} c8Je&y8
} aI;-NnC
^xm%~
} dJ>~
7!U^?0?/
改进后的归并排序: `i<omZ[aT
y~n1S~5cI
package org.rut.util.algorithm.support; g+A>Bl3#
O+OUcMa,
import org.rut.util.algorithm.SortUtil; J"~!jrzBh(
LY;FjbyU
/** ZXl_cq2r
* @author treeroot Hg5:>?Lw@
* @since 2006-2-2 ]Bj2;<@y
* @version 1.0 LS]0p#
*/ E.N
public class ImprovedMergeSort implements SortUtil.Sort { $Da?)Hz'F
y#zO1Nig`
private static final int THRESHOLD = 10; L Iz<fB
7>lM^ :A
/* .F},Z[a&
* (non-Javadoc) [h63*&
* Z7XFG&@6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gVNoC-n)
*/ F.),|t$\
public void sort(int[] data) { ;2P
int[] temp=new int[data.length]; }`.d4mm
mergeSort(data,temp,0,data.length-1); &EmG\vfE
} gCq'#G\Z
U0Uy C
private void mergeSort(int[] data, int[] temp, int l, int r) { V]NCFG
int i, j, k; ^B:;uyG]M
int mid = (l + r) / 2; VwOcWKD
if (l == r) s }Ql9
return; YD;G+"n?T
if ((mid - l) >= THRESHOLD) \@[,UZ
mergeSort(data, temp, l, mid); BU#3fPl
else RdBIbm
insertSort(data, l, mid - l + 1); 9l(T>B2a
if ((r - mid) > THRESHOLD) 6H=gura&
mergeSort(data, temp, mid + 1, r); 0X3yfrim
else UmR4zGM}
insertSort(data, mid + 1, r - mid); 2Qt!JXC
~7anj.
for (i = l; i <= mid; i++) { >x>/}`
temp = data; 9dmoB_G
} 1YK(oRSDn
for (j = 1; j <= r - mid; j++) { $,P:B%]
temp[r - j + 1] = data[j + mid]; J$5Vjh'aM
} =f!clhO
int a = temp[l]; YjH~8==
int b = temp[r]; >,[@SF%
for (i = l, j = r, k = l; k <= r; k++) { ,l Y4WO
if (a < b) { Xv3pKf-K
data[k] = temp[i++]; TJ1h[
a = temp; Wy%FF\D.Y
} else { >n^780S|
data[k] = temp[j--]; T*nP-b
b = temp[j]; zz /4 ()u
} 3)yL#hXg)
} vA}_x7}n(
} l0C`teO
SL-;h#-y 4
/** PD&gC88
* @param data hHHQmK<r
* @param l axpZ`BUc
* @param i 9:P]{}
*/ wZs 2aa
private void insertSort(int[] data, int start, int len) { qV6WT&)T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uFhaN\S
} [dAQrou6P
} QFMAy>Gdn
} =3 Vug2*wd
} YZ`SF"Bd(
tj$[szo
堆排序： :AS`1\ C
K8R>O *~
package org.rut.util.algorithm.support; -Caj>K
JQ6M,O
import org.rut.util.algorithm.SortUtil; hGkJ$QT
kRc+OsY9
/** 5VJe6i9;
* @author treeroot =J4|"z:
* @since 2006-2-2 1X&.po
* @version 1.0 BM`6<Z"3q
*/ lLDZ#'&An
public class HeapSort implements SortUtil.Sort{ ] |nW
R3;%eyu
/* (non-Javadoc) lPI~5N8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 15hqoo9!
*/ Fj(GyPFG
public void sort(int[] data) { /0 4US5En
MaxHeap h=new MaxHeap(); X\/M(byn
h.init(data); FF~r&h8H
for(int i=0;i h.remove(); eIfQ TV
System.arraycopy(h.queue,1,data,0,data.length); ~`C_B]3|
} O`Gq7=X
vaGF(hfTA
private static class MaxHeap{ N@L{9ak1
e"52'zAV-
void init(int[] data){ ~7U~
this.queue=new int[data.length+1]; r4fHD~#l{
for(int i=0;i queue[++size]=data; c(e>Rmh
fixUp(size); >W;NMcN~
} a5GLbanF
} # )y/aA
[ r8 ZAS
private int size=0; U!`iKy-
)+hV+rM jp
private int[] queue; Yu>DgMW
{*AA]z?zo
public int get() { 7oWMjw\
return queue[1]; Hddc-7s
} kQ}n~Hn
94?WL
public void remove() { c%J6!\
SortUtil.swap(queue,1,size--); JD~;.3$/k
fixDown(1); ,_fz)@)
} 4a"Fu<q
file://fixdown u}gavG l
private void fixDown(int k) { AoeRoqg&#
int j; 3_~iq>l
while ((j = k << 1) <= size) { > :IWRc2
if (j < size %26amp;%26amp; queue[j] j++; NOuG#P
if (queue[k]>queue[j]) file://不用交换 D**GC
break; 7P7OTN
SortUtil.swap(queue,j,k); &J*M
k = j; 1XMR7liE
} ^Aq0<
} G$+v |z
private void fixUp(int k) { $KO2+^%y
while (k > 1) { uI)twry]@
int j = k >> 1; RI0^#S_{
if (queue[j]>queue[k]) B-R#?Xn:!I
break; sa(.Anmlj
SortUtil.swap(queue,j,k); `;E/\eG"
k = j; ( %\7dxiK
} $+!dP{
} ba);f[>
2t-w0~O
} n%s%i-[5B
\A"o[A2v
} by X!,
%,kP_[!>Q
SortUtil： :^.wjUI
hPDKxYD]f
package org.rut.util.algorithm; `t&{^ a&Y"
"y,YC M`
import org.rut.util.algorithm.support.BubbleSort; Xq*^6*E-}
import org.rut.util.algorithm.support.HeapSort; 6'r8.~O
import org.rut.util.algorithm.support.ImprovedMergeSort; $'498%K2
import org.rut.util.algorithm.support.ImprovedQuickSort; t'vt'[~,U
import org.rut.util.algorithm.support.InsertSort; 0jf6 z-4
import org.rut.util.algorithm.support.MergeSort; \ ;npdFy
import org.rut.util.algorithm.support.QuickSort; ,vJt!}}
import org.rut.util.algorithm.support.SelectionSort; HYmC3
import org.rut.util.algorithm.support.ShellSort; tcuwGs>_
U]iI8c
/** QO/0VB42
* @author treeroot 50W+!'
* @since 2006-2-2 ["Ltqgx
* @version 1.0 2T~cOH;T
*/ ?pTX4a&>
public class SortUtil { D(#f`Fj;
public final static int INSERT = 1; G@[8P?M=Z
public final static int BUBBLE = 2; 5&&4-
public final static int SELECTION = 3; 2J ZR"P
public final static int SHELL = 4; &X$T "Dp
public final static int QUICK = 5; lW&(dn)}
public final static int IMPROVED_QUICK = 6; ~2w&+@dV%
public final static int MERGE = 7; <W80AJ
public final static int IMPROVED_MERGE = 8; pk/#RUfT+
public final static int HEAP = 9; H\67Pd(Z6
Az`Aa0h]7
public static void sort(int[] data) { <(L@@.87R
sort(data, IMPROVED_QUICK); Y%s:oHt
} 1iy$n
private static String[] name={ F4EAC|Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" I,j4 BU4
}; Tlsh[@Q
`Y#At3{
private static Sort[] impl=new Sort[]{ 5Q?Jm~H9
new InsertSort(), $KiCs]I+
new BubbleSort(), Oj5UG*
new SelectionSort(), &O&HczO
new ShellSort(), 0 &zp
new QuickSort(), Ts5)r(
new ImprovedQuickSort(), \G" S7
new MergeSort(), M&Ka^h;N
new ImprovedMergeSort(), =ejj@c
new HeapSort() 8M,*w6P
}; eqo0{e
Ps!MpdcL3
public static String toString(int algorithm){ ;c(a)_1
return name[algorithm-1]; |*&l?S
} 9y7N}T6
Zd*$^P,|
public static void sort(int[] data, int algorithm) { };/QK*
impl[algorithm-1].sort(data); zUfq.
} /`*{57/3
=}^NyLE?
public static interface Sort { ,XD" p1(|G
public void sort(int[] data); Jl Do_}
} > ;,S||
-/yqiC-yx
public static void swap(int[] data, int i, int j) { %tCv-aX4
int temp = data; RgJ@J/p"
data = data[j]; Ys"wG B>
data[j] = temp; /{i~CGc;"
} _4ag-'5
} 6>>; fy2