[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; u4lM>(3Y}
} ^fKKsfIf
int i1=l; .yF-<Y
int i2=mid+1; n*GB`I*g
for(int cur=l;cur<=r;cur++){ ZvuY]=^3
if(i1==mid+1) 5^uX!_r`
data[cur]=temp[i2++]; 3~`\FuHHe
else if(i2>r) 3+>R%TX6i<
data[cur]=temp[i1++]; rE*yT(:w
else if(temp[i1] data[cur]=temp[i1++]; `_yksh3zL4
else og$dv 23
data[cur]=temp[i2++]; Q8HNST($?
} 0^{Tq0Ri[
} YEV;GFI1
G$zY&
} =)y$&Ydj
g,E)F90
改进后的归并排序: v0r:qku
Cdl"TZ<
package org.rut.util.algorithm.support; e`+
6 w!qZ4$
import org.rut.util.algorithm.SortUtil; ="T}mc
i.9}bw 9u@
/** ';eAaDM
* @author treeroot SMvlEj^
* @since 2006-2-2 T>|+cg
* @version 1.0 nILUo2e~
*/ 6+sz4
public class ImprovedMergeSort implements SortUtil.Sort { R]od/u/$
v2|zIZ
private static final int THRESHOLD = 10; }!g$k $y
s,-<P1}/
/* VIWH~UR)&!
* (non-Javadoc) mmFcch$Jv
* r(]Gd`]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U;&s=M0[
*/ ;Qd'G7+
public void sort(int[] data) { :qXREF@h
int[] temp=new int[data.length]; /_<_X 7
mergeSort(data,temp,0,data.length-1); ,9|7{j|u
} v'L"sgW6I
AJ 0Bb7
private void mergeSort(int[] data, int[] temp, int l, int r) { Xj?LU7
int i, j, k; d}E6d||A
int mid = (l + r) / 2; $xvwnbq#y
if (l == r) -XECYwTh
return; +L?;g pVE&
if ((mid - l) >= THRESHOLD) = r=/L
mergeSort(data, temp, l, mid); g3n>}\xG>
else Uwiy@T Z
insertSort(data, l, mid - l + 1); I2{zy|&
if ((r - mid) > THRESHOLD) .O5|d+S
mergeSort(data, temp, mid + 1, r); #;2mP6a[
else :@~3wD[y
insertSort(data, mid + 1, r - mid); _uh@fRyh
@zR_[s
for (i = l; i <= mid; i++) { };(2 na
temp = data; o) eW5s,6
} .Xta;Py|J
for (j = 1; j <= r - mid; j++) { ld~*w
temp[r - j + 1] = data[j + mid]; 5k_%%><: q
} IL8&MA%
int a = temp[l]; w4y???90)
int b = temp[r]; 4>=Y@z
for (i = l, j = r, k = l; k <= r; k++) { O6-"q+H)
if (a < b) { F8m@mh*8>
data[k] = temp[i++]; j~2t^Qz
a = temp; .R+n}>+K
} else { #$t93EI
data[k] = temp[j--]; ZCuh^
b = temp[j]; {flxZ}
} hEFn>
} A|L-;P NP
} nNM)rW
"^pF2JI
/** 5tbi};
* @param data A-hWg;
* @param l Th])jQ*
* @param i Y%rC\Ij/i
*/ =>C3IR/
private void insertSort(int[] data, int start, int len) { [Az^i>iH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nRZ T~S4
} b|Ed@C
} p t{/|P
} 5geZ6]|
} q|;+Wp?
5[qx5|O
堆排序： fwyz|>H_Y(
j"+R*H(#
package org.rut.util.algorithm.support; n]JfdI
7 ( /
import org.rut.util.algorithm.SortUtil; ;#D:S6 L
%}~Ncn_r
/** 0Ioa;XgOn
* @author treeroot ]\R%@FCYc
* @since 2006-2-2 [k +fkr]
* @version 1.0 bDcWPwe
*/ bO{wQ1)Z_
public class HeapSort implements SortUtil.Sort{ @6DV?VL
pzBd(d^*
/* (non-Javadoc) i*vf(0G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r#.\5aQt
*/ my3W[3#
public void sort(int[] data) { .7zdA IKW
MaxHeap h=new MaxHeap(); T;I>5aQ:q4
h.init(data); 0/%VejZ'
for(int i=0;i h.remove(); R75np^
System.arraycopy(h.queue,1,data,0,data.length); Yg7C"3;Vt
} Q,f5r%A.
r`'n3#O*
private static class MaxHeap{ 2:S 4M.j
;-sF%c
void init(int[] data){ Hb *&&
this.queue=new int[data.length+1]; 93N:?B9
for(int i=0;i queue[++size]=data; szb],)|18
fixUp(size); 4~{q=-]V
} A=k{Rl{LA
} #$>m`r
F0FF:><
private int size=0; Hq$?-%4
Co>=<\yi
private int[] queue; kO\aNtK
O7RW*V:G@
public int get() { {7X80KI
return queue[1]; bc|DC,n?
} g)k::k)<e
>'lte&
public void remove() { -5yEd>Z
SortUtil.swap(queue,1,size--); "Tm`V9
fixDown(1); /v:+ vh*mS
} X8b= z9
file://fixdown y|%rW
private void fixDown(int k) { h|1 /Q (
int j; JuT~~Z
while ((j = k << 1) <= size) { :AB$d~${M>
if (j < size %26amp;%26amp; queue[j] j++; 13P8Zmco
if (queue[k]>queue[j]) file://不用交换 dAcy;-[[P
break; ',p`B-dw
SortUtil.swap(queue,j,k); 5zF7yvS.w
k = j; vJfex,#lv
} *<_8]C0>
} VS\~t
private void fixUp(int k) { qMe$Qr8
while (k > 1) { 9rmOf Jo:
int j = k >> 1; wg=ge]E5
if (queue[j]>queue[k]) beYaQz/@W
break; %<8lLRl
SortUtil.swap(queue,j,k); 8FThu[
k = j; {aWTT&-N
} q>*+.~
} 8?O6IDeW
5}4r'P$m:
} x;Jy-hMNl
xV4 #_1(
} dw!cDfT+
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SortUtil： FHS6Mk26
y ZsC>
package org.rut.util.algorithm; 5[Yzi> o[
eZm,K'/!
import org.rut.util.algorithm.support.BubbleSort; +mN]VO*y
import org.rut.util.algorithm.support.HeapSort; -P<e-V%<
import org.rut.util.algorithm.support.ImprovedMergeSort; PSQ5/l?\>
import org.rut.util.algorithm.support.ImprovedQuickSort; TnqspS2;R
import org.rut.util.algorithm.support.InsertSort; Hinz6k6!
import org.rut.util.algorithm.support.MergeSort; viT/$7`AI
import org.rut.util.algorithm.support.QuickSort; >I3#ALF
import org.rut.util.algorithm.support.SelectionSort; {? jr
import org.rut.util.algorithm.support.ShellSort; jR#g>MDKB
O#E]a<N`
/** /K"koV;
* @author treeroot d[5?P?h')
* @since 2006-2-2 8`*Wl;9u
* @version 1.0 G.,dP+i
*/ :.IVf Zw
public class SortUtil { VMUK|pC4K
public final static int INSERT = 1; %_!YonRY|X
public final static int BUBBLE = 2; h$FpH\-
public final static int SELECTION = 3; IR,`-
public final static int SHELL = 4; ?j{LE-(
public final static int QUICK = 5; $)M8@d
public final static int IMPROVED_QUICK = 6; UHYnl]
public final static int MERGE = 7; *;wPAQE
public final static int IMPROVED_MERGE = 8; "Fu*F/KW
public final static int HEAP = 9; <$LVAy"RD
61q:nWs
public static void sort(int[] data) { gjJ?*N[
sort(data, IMPROVED_QUICK); <3iL5}
} #$QC2;/)F
private static String[] name={ >v9 ("
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k"V| f&
}; bBBW7',[a
Ms.1RCup
private static Sort[] impl=new Sort[]{ %B$~yx3#
new InsertSort(), |>(;gr/5(
new BubbleSort(), p*8LS7UT
new SelectionSort(), aCe<*;b@
new ShellSort(), O<Rm9tZ8
new QuickSort(), W|oLS
new ImprovedQuickSort(), mVN^X/L(y
new MergeSort(), i:wTPR
new ImprovedMergeSort(), {i)k#`
new HeapSort() t8,s]I&
}; ~*9 vn Z@
v_PhJKE
public static String toString(int algorithm){ 8o-*s+EY"&
return name[algorithm-1]; {1.t ZCMT
} z!quA7s<]
:[oFe/1K!4
public static void sort(int[] data, int algorithm) { s88lN=;
impl[algorithm-1].sort(data); UW*[)yw]
} /ov&h;
FV>LD% uu
public static interface Sort { )pV5l|`
public void sort(int[] data); "If]qX(w
} ixZ w;+h
A"8`5qa
public static void swap(int[] data, int i, int j) { ,c#=qb8""
int temp = data; 8*;88vW"2
data = data[j]; sG`:mc~0
data[j] = temp; JW;DA E<
} ,lLkAd?q
} 4i>sOP3 B