[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; p+;;01Z+_
} 5Y>fVq{U?;
int i1=l; f{-,"6Y1
int i2=mid+1; u/apnAW@M
for(int cur=l;cur<=r;cur++){ ZmvtUma
if(i1==mid+1) a/n~#5-
data[cur]=temp[i2++]; (\%J0kR3[
else if(i2>r) ~g}blv0q+B
data[cur]=temp[i1++]; lXRB"z
else if(temp[i1] data[cur]=temp[i1++]; MM*9Q`cB
else (_R!:H(]m
data[cur]=temp[i2++]; w19OOD
} w>4( hGO
} Q2'`K|T
/jSb^1\
} ~m4LL[
n]8*yoge
改进后的归并排序: {S`Rr/E|%
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package org.rut.util.algorithm.support; NNBT.k3)
x@*?~1ai
import org.rut.util.algorithm.SortUtil; Rl'xEtaN
D7Y?$=0ycb
/** 69 J4p=c,
* @author treeroot 1U(!%},
* @since 2006-2-2 F(`Q62o@
* @version 1.0 65GC7 >[
*/ G+tzp&G@
public class ImprovedMergeSort implements SortUtil.Sort { (!a\23
jGYl*EBx
private static final int THRESHOLD = 10; v}<z_i5/C.
Ky*xAx:
/* [$M l;K
* (non-Javadoc) Yc5<Y-W
* Lr Kx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RN$q,f[#
*/ Hp@cBj_@P2
public void sort(int[] data) { *fSX3Dk
int[] temp=new int[data.length]; X{iidTW`xv
mergeSort(data,temp,0,data.length-1); @ev^e!B
} PiLLUyQx
0ke1KKy/d
private void mergeSort(int[] data, int[] temp, int l, int r) { nyZ?m
int i, j, k; uN0'n}c;1.
int mid = (l + r) / 2; ~Fo`Pr_
if (l == r) @"iNjqxh
return; I#xhmsF
if ((mid - l) >= THRESHOLD) GYonb)F
mergeSort(data, temp, l, mid); 3*R(&O6}
else +B7UGI
insertSort(data, l, mid - l + 1); =H"%{VeC5
if ((r - mid) > THRESHOLD) &VxK AQMxN
mergeSort(data, temp, mid + 1, r); 2|`~3B)#
else KF7d`bRe
insertSort(data, mid + 1, r - mid); PAiVUGp5[
LNvkC4
for (i = l; i <= mid; i++) { akQb%Wq
temp = data; V3_qqz}`r
} oTA'=<W?D
for (j = 1; j <= r - mid; j++) { lEpPi@2PK
temp[r - j + 1] = data[j + mid]; 17VNw/Y
} 0.#%KfQ
int a = temp[l]; zu1gP/
int b = temp[r]; Xg;q\GS/<i
for (i = l, j = r, k = l; k <= r; k++) { &WdP=E"
if (a < b) { >P6U0
data[k] = temp[i++]; ! &V,+}>)
a = temp; eXdH)|l,\
} else { r<*Y1;7H'
data[k] = temp[j--]; UHDcheeRD
b = temp[j]; +PO& z!F
} mHc2v==X\-
} 7VJf~\%1j
} obw:@i#
?#__#
/** &jDRRT3
* @param data V{0V/Nv
* @param l 7wqD_Xr
* @param i Z8pZm`g)T
*/ u[!Ex=9W
private void insertSort(int[] data, int start, int len) { E}]SGU"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qche7kg!a
} tI2p-d9B
} Pv@;)s(-
} *8 ]
} U9AtC.IG!
Bc#6mO-
堆排序： +Jc-9Ko\c;
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package org.rut.util.algorithm.support; vaZ?>94
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import org.rut.util.algorithm.SortUtil; a[gN+DX%L
r3.v^
/** qxD<mZ@-R0
* @author treeroot wSs78c=
* @since 2006-2-2 ;<`
* @version 1.0 3lNw*M|")
*/ uMP&.Y(
public class HeapSort implements SortUtil.Sort{ ;}k_2mr~
X .S8vlb4z
/* (non-Javadoc) zdDJcdbGd1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !?)iP
*/ t{/ EN)J
public void sort(int[] data) { O0"&wvR+5
MaxHeap h=new MaxHeap(); i)e)FhEY6
h.init(data); yDw^xGws
for(int i=0;i h.remove(); "?sLi
System.arraycopy(h.queue,1,data,0,data.length); E9[8th,t
} '?!2h'
H %PIE1_
private static class MaxHeap{ Q_a%$a.rV
Y'%_--
void init(int[] data){ ^F1zkIE
this.queue=new int[data.length+1]; mH3{<^Z6
for(int i=0;i queue[++size]=data; >JhIRf
fixUp(size); d>7bwG+k
} g:c @
} 3!B3C(g
e3>k"
private int size=0; "i*Gi \U
RbNRBK!{
private int[] queue; gM3gc;
w@2LFDp
public int get() { QfM*K.7Sl
return queue[1]; %x7l`.)N
} 8JAT2a61ur
Yui:=GgUrr
public void remove() { N,_ej@L8
SortUtil.swap(queue,1,size--); yc5n
fixDown(1); -.WVuc`
} `+/[0B=.
file://fixdown h Tn^:%(
private void fixDown(int k) { B[MZPv)
int j; Bj7\{x,?
while ((j = k << 1) <= size) { -nT+!3A8
if (j < size %26amp;%26amp; queue[j] j++; Onoi6^G
if (queue[k]>queue[j]) file://不用交换 o[ %Q&u
break; XsHl%o8,z
SortUtil.swap(queue,j,k); HIeMV,.QN
k = j; }Mo9r4}
} 5cQBqH]
} c#;LH5KI
private void fixUp(int k) { "Hjw
while (k > 1) { cw<DM%p
int j = k >> 1; HwSPOII|8K
if (queue[j]>queue[k]) n*6',BY
break; fhn0^Qc"+
SortUtil.swap(queue,j,k); Tm^zoVi
k = j; AjANuyUaP
} ^NLKX5Q
} x{*!"a>
S8vmXlD
} ?\F,}e
{nOK*7+"
} T[q-$8U
r5iO%JFg
SortUtil： @#H{nj Z
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package org.rut.util.algorithm; IL:"]`f*
1I^Sv
import org.rut.util.algorithm.support.BubbleSort; :g9z^ $g
import org.rut.util.algorithm.support.HeapSort; JkxS1
import org.rut.util.algorithm.support.ImprovedMergeSort; FvI`S>
import org.rut.util.algorithm.support.ImprovedQuickSort; L kq>>?T=
import org.rut.util.algorithm.support.InsertSort; (Fgt#H(B
import org.rut.util.algorithm.support.MergeSort; Nyqm0C6m^
import org.rut.util.algorithm.support.QuickSort; X)f"`$
import org.rut.util.algorithm.support.SelectionSort; |f?C*t',
import org.rut.util.algorithm.support.ShellSort; *u{.K:.I
1v\-jM"
/** M*S5&xpX
* @author treeroot fp![Pbms.
* @since 2006-2-2 Z%OSW
* @version 1.0 >;3c;nf
*/ 4QZy-a*tA
public class SortUtil { B?%D
public final static int INSERT = 1; j'J*QK&Q
public final static int BUBBLE = 2; ia_8$>xW+
public final static int SELECTION = 3; VYAe!{[
public final static int SHELL = 4; 4COf H7Al9
public final static int QUICK = 5; YKc{P"'/|
public final static int IMPROVED_QUICK = 6; \!V6` @0KC
public final static int MERGE = 7; }\*Sf[EMD
public final static int IMPROVED_MERGE = 8; dw4)4_
public final static int HEAP = 9; +tN-X'u##
uATBt
public static void sort(int[] data) { *-Yw0Y[E
sort(data, IMPROVED_QUICK); .yP 3}Nl
} gwYd4
private static String[] name={ ^ KjqS\<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t@HE.h
}; z0W+4meoH
4 z`5W,
private static Sort[] impl=new Sort[]{ XbOL/6V ^[
new InsertSort(), Mk9kGP%
new BubbleSort(), x/S%NySG
new SelectionSort(), tQ}gBE63
new ShellSort(), z*[Z:
new QuickSort(), j{Fo 6##
new ImprovedQuickSort(), 5Q}@Y3 i=
new MergeSort(), si;]C~X*
new ImprovedMergeSort(), d?P aZz{4
new HeapSort() 0Yjy
}; &4[iC/}
1<p"z,c
public static String toString(int algorithm){ E>1USKxn
return name[algorithm-1]; Ji[w; [qL
} XN0Y#l
'~cEdGD9H
public static void sort(int[] data, int algorithm) { gPi_+-@
impl[algorithm-1].sort(data); }Tef;8d
} Mvh_>-i
#"M Pe4
public static interface Sort { *j* WE\
public void sort(int[] data); fytx({I .a
} e](=)h|
D/Wuan?yPN
public static void swap(int[] data, int i, int j) { z,7^dlT
int temp = data; o%5bg(
data = data[j]; uSQ*/h-<)0
data[j] = temp; s?E:]
} X m3t xp#
} >?'FH +2K