[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; sQTW?KA-Te
} NhpGa@[D
int i1=l; n;2W=N?y
int i2=mid+1; &wLI:x5
for(int cur=l;cur<=r;cur++){ s_EiA _
if(i1==mid+1) {^$rmwN
data[cur]=temp[i2++]; {?eD7xL:-
else if(i2>r) `q4\w[0+p
data[cur]=temp[i1++]; Lo9+#ITyx
else if(temp[i1] data[cur]=temp[i1++]; ^Z\1z!{R
else IjNE1b$
data[cur]=temp[i2++]; \kC/)d
} ]FsPlxk6
} >f}rM20Vm
Eepy%-\
} -C.eXR{s
$yc&f(Tv
改进后的归并排序: ^\Jg {9a
h9SS o0]F
package org.rut.util.algorithm.support; b:W]L3Z8
C 5)G^
import org.rut.util.algorithm.SortUtil; /UM9g+Bb
W}JJaZR*X
/** njvmf*A?S
* @author treeroot ow]n)Te
* @since 2006-2-2 8 I,(\<Xv
* @version 1.0 "64pVaT4
*/ H:p(C?tk{
public class ImprovedMergeSort implements SortUtil.Sort { fa"eyBO50
E)>6}0P
private static final int THRESHOLD = 10; ]$KH78MTW
E~{-RZNK
/* rK)%n!Z
* (non-Javadoc) S(/@.gI:f
* *|hICTWL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \XmtSfFC
*/ d4A}BTs1
public void sort(int[] data) { "f5u2=7 }
int[] temp=new int[data.length]; ^VoQGP/cl
mergeSort(data,temp,0,data.length-1); >;0z-;k6
} 4[rD|
rP#@*{";
private void mergeSort(int[] data, int[] temp, int l, int r) { PvKe|In(
int i, j, k; TC J\@|yw
int mid = (l + r) / 2; = `70]%
if (l == r) .RoO6:T6
return; P_Po g^
if ((mid - l) >= THRESHOLD) xR;Xx;
mergeSort(data, temp, l, mid); :'.-*Ew
else G}] ZZ
insertSort(data, l, mid - l + 1); 2t#9ih"9
if ((r - mid) > THRESHOLD) kA\;h|Y3
mergeSort(data, temp, mid + 1, r); a08B8
else 7r*>?]y+
insertSort(data, mid + 1, r - mid); AF **@iG
];j8vts&
for (i = l; i <= mid; i++) { A\k-OP]
temp = data; =XudL^GF
} Awe\KJ^`
for (j = 1; j <= r - mid; j++) { WET $H,
temp[r - j + 1] = data[j + mid]; 5%,n[qj4IT
} .DCp)&m l;
int a = temp[l]; 9lOUE
int b = temp[r]; 'Y>!xm
for (i = l, j = r, k = l; k <= r; k++) { u4fTC})4{C
if (a < b) { vjbot^W9
data[k] = temp[i++]; :=*>:*.Kb
a = temp; o3}12i S
} else { `| R8WM
data[k] = temp[j--]; *1%=?:$(r6
b = temp[j]; ?MO'WB9+JR
} `4Nc(aUr
} `4l>%S8y:
} %3"3OOT7
V}@c5)(j
/** bCA3w%,kM
* @param data ]:]2f9y
* @param l )mwY] !
* @param i nef-xxXC^I
*/ uCmdNY
private void insertSort(int[] data, int start, int len) { !A!zG)Ue<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uA\A4
} v }P~g
} ;#f_e;
} j:U>V7Kn3~
} I%{U~
KAEf4/
堆排序： cF,u)+2b|6
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package org.rut.util.algorithm.support; 0Wv9K~F
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import org.rut.util.algorithm.SortUtil; nc@ul')
x-Xb4?{
/** 6^|bKoN/ f
* @author treeroot ux{OgFfi
* @since 2006-2-2 ?55('+{l
* @version 1.0 PS \QbA
*/ EA?:GtH
public class HeapSort implements SortUtil.Sort{ TSE(Kt
C8NbxP
/* (non-Javadoc) yHT}rRS8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tk_y~-xz
*/ o&I0*~sN
public void sort(int[] data) { y]cx}9~
MaxHeap h=new MaxHeap(); VVCCPK^<
h.init(data); f\/};a
for(int i=0;i h.remove(); 7_q"%xH
System.arraycopy(h.queue,1,data,0,data.length); Uf_w o
} dbnH#0i
<8-I:o]mF
private static class MaxHeap{ 9x{T"'
;x+4jpH]B
void init(int[] data){ x40R)Led
this.queue=new int[data.length+1]; Mzxz-cE
for(int i=0;i queue[++size]=data; MZ0uc2L=
fixUp(size); 0r+-}5aSl5
} [iL2c=_
} jY ^ndr0;
]1D>3
private int size=0; 7W}~c/%
6jF~zI^
private int[] queue; kv`x
r!Mr\
public int get() { Q9W*)gBvn
return queue[1]; a$9UUH-|
} T_YN^za(q
i_gS!1Z2
public void remove() { f_;3|i
SortUtil.swap(queue,1,size--); %!YsSk,
fixDown(1); ocL
} Z< uwqA
file://fixdown Rs<,kMRGVL
private void fixDown(int k) { EcwHO
int j; P=u)Q _
while ((j = k << 1) <= size) { nc$?tC9V
if (j < size %26amp;%26amp; queue[j] j++; 1d-j_H`s
if (queue[k]>queue[j]) file://不用交换 %NxNZe
break; <NS=<'U
SortUtil.swap(queue,j,k); ;5y!,OF6
k = j; 5]'iSrp
} n7{1m$/
} !kmo%+
private void fixUp(int k) { (v(_XlMK
while (k > 1) { `bt]v$
int j = k >> 1; frGUT#9?n
if (queue[j]>queue[k]) (S9"(\A
break; XV+BSW7}
SortUtil.swap(queue,j,k); qZ8lU
k = j; |wK)(s
} cH2 nG:H
} TR ]lP<m
{9C(\i +
} v SWqOv$
{/B) YR
} s'LG3YV-<
+86\&y)
SortUtil： ;5 IS58L
NK,)"WE
package org.rut.util.algorithm; ugMJ}IGq
=E |[8 U)
import org.rut.util.algorithm.support.BubbleSort; ym,S/Uz
import org.rut.util.algorithm.support.HeapSort; ]YOQIzkL4}
import org.rut.util.algorithm.support.ImprovedMergeSort; }m0Lr:vq<r
import org.rut.util.algorithm.support.ImprovedQuickSort; M5P63=1+
import org.rut.util.algorithm.support.InsertSort; FIG5]u
import org.rut.util.algorithm.support.MergeSort; w(mn@Qc
import org.rut.util.algorithm.support.QuickSort; FK mFjqY
import org.rut.util.algorithm.support.SelectionSort; q8[Nr3.
import org.rut.util.algorithm.support.ShellSort; xES+m/?KlZ
6EPC$*Xp!
/** drb_GT
* @author treeroot #uey1I@"9
* @since 2006-2-2 &,KxtlR![
* @version 1.0 ;39{iU.m
*/ h]MSjC.X
public class SortUtil { 9)f1CC]
public final static int INSERT = 1; ?w<x_Lo
public final static int BUBBLE = 2; S!.xmc\
public final static int SELECTION = 3; m=y6E, _
public final static int SHELL = 4; #*Mk@XrV
public final static int QUICK = 5; *23
public final static int IMPROVED_QUICK = 6; iB]kn(2C
public final static int MERGE = 7; ?(g kkYI
public final static int IMPROVED_MERGE = 8; 4&`66\p;
public final static int HEAP = 9; I~q}M!v~
%t<Y6*g
public static void sort(int[] data) { <v5toyA
sort(data, IMPROVED_QUICK); J'B;
} J^t=.-a|
private static String[] name={ 8<_WtDg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L^ +0K}eD
}; B]]M?pS
Dvx"4EA{7{
private static Sort[] impl=new Sort[]{ zIdQ^vm8Q
new InsertSort(), *>\RGL;]8
new BubbleSort(), f_z2d+
new SelectionSort(), ?BWWb
new ShellSort(), RNi&OG(
new QuickSort(), Oe;9[=L[
new ImprovedQuickSort(), {J99F
new MergeSort(), 8#kFS@
new ImprovedMergeSort(), ` 0\hm`
new HeapSort() xRaYm
}; WP}__1!%u
4Y-9W2s
public static String toString(int algorithm){ o+aB[+
return name[algorithm-1]; qrt+{5/t
} -Mv`|odY/
x80~j(uVf
public static void sort(int[] data, int algorithm) { "`&?<82
impl[algorithm-1].sort(data); jl7e6#zu
} M5%xp.B
@${!C\([1
public static interface Sort { ("{AY?{{
public void sort(int[] data); $s) ^zm~
} j"YJ1R-5
Q |l93Rb`
public static void swap(int[] data, int i, int j) { pq4+n'uO
int temp = data; 4vy!'r@
data = data[j]; _ H@pYMNH
data[j] = temp; HM76%9!
} jMw;`yh
} (:hPT-1