[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; O>]i?
} v}j5G, [-
int i1=l; mufGv%U2
int i2=mid+1; o{,IO!q
for(int cur=l;cur<=r;cur++){ ,XEIg
if(i1==mid+1) FprdP*/
data[cur]=temp[i2++]; ]{6/6jl
else if(i2>r) 6~%><C
data[cur]=temp[i1++]; ?;CIS$$r
else if(temp[i1] data[cur]=temp[i1++]; RQQ'Wg
else D#&9zR86F
data[cur]=temp[i2++]; &>Ve4!i q
} Hh^ "c}
} =\%ER/
mBErU6?X,A
} (`dz37@*
B<SE|~\2
改进后的归并排序: Ux=~-}<-w
#("M4}~
package org.rut.util.algorithm.support; ih0a#PB8
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import org.rut.util.algorithm.SortUtil; _gqqPny4$
/Yy)=~t{
/** p [C 9g
* @author treeroot 5,gT|4|B\g
* @since 2006-2-2 $\NqD:fgb
* @version 1.0 ruGJZAhIA^
*/ u4~+Bc_GL
public class ImprovedMergeSort implements SortUtil.Sort { \.mVLLtG
2]mV9B
private static final int THRESHOLD = 10; <(jk}wa<
00 x-
/* n/5T{NfG
* (non-Javadoc) jlj ge=#c2
* 66pjWS {X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pjs=n7
*/ (SRY(q
public void sort(int[] data) { >;MJm
int[] temp=new int[data.length]; Q<V(#)*
mergeSort(data,temp,0,data.length-1); 61H_o7XXk
} / rc[HbNg.
k4V3.i!E
private void mergeSort(int[] data, int[] temp, int l, int r) { oM!&S'M/
int i, j, k; `Jc/ o=]
int mid = (l + r) / 2; ?2&= +QaT
if (l == r) dHIk3j-!
return; Q)0KYKD+@
if ((mid - l) >= THRESHOLD) GmR3 a
mergeSort(data, temp, l, mid); e El)wZ,A
else $,~Ily7w
insertSort(data, l, mid - l + 1); ;-VZVp}Y
if ((r - mid) > THRESHOLD) r"2lcNE
mergeSort(data, temp, mid + 1, r); X=#us7W}
else _ACN
insertSort(data, mid + 1, r - mid); 1jd{AqHl
VH]}{i"`
for (i = l; i <= mid; i++) { yIKpyyC9H
temp = data; _!o8s%9be
} $!*>5".A
for (j = 1; j <= r - mid; j++) { /3aW 0/^o
temp[r - j + 1] = data[j + mid]; o9e8Oj&
} T9V=#+8#"
int a = temp[l]; Bn]=T
int b = temp[r]; E_=F'sP?
for (i = l, j = r, k = l; k <= r; k++) { $97O7j@
if (a < b) { /8e}c`
data[k] = temp[i++]; .1[.f}g$J
a = temp; '{2]:
} else { S#M8}+ZD,
data[k] = temp[j--]; ,)[9RgsE
b = temp[j]; b$DiDm
} U&#` <R_0
} VP A+/5TW
} 9\.0v{&v
eI:[o
/** ? #rXc%F
* @param data ,7j8+p|},
* @param l G~5pMyOR
* @param i |2l-s 1|y
*/ -0CBMoe
private void insertSort(int[] data, int start, int len) { INr1bAe$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); teS>t!d
} "/6#Z>y
} ym{@w3"S
} 5Qq/nUR
} {C5:as
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堆排序： #1haq[Uv7
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package org.rut.util.algorithm.support; o5s6$\"
vm|u~Yd,s
import org.rut.util.algorithm.SortUtil; 8S#$'2sT
X "7CN Td
/** B`-uZ9k
* @author treeroot Sn*s@RE\s
* @since 2006-2-2 "?zWCH
* @version 1.0 zjr($?
*/ eV*QUjS~
public class HeapSort implements SortUtil.Sort{ rQ*w3F?:
iXm&\.%
/* (non-Javadoc) &b#d4p6&l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U6/7EOW,
*/ Jt5V{9:('
public void sort(int[] data) { <=n;5hv:
MaxHeap h=new MaxHeap(); bpBn3f`?*
h.init(data); Z(6.e8fK
for(int i=0;i h.remove(); tAN!LI+w
System.arraycopy(h.queue,1,data,0,data.length); oUnb-,8n
} 9$$ Ijf
~Yd[&vpQ
private static class MaxHeap{ ^rJTlh 9
&pzL}/u
void init(int[] data){ GPHb-
this.queue=new int[data.length+1]; Ll=G+cw6P
for(int i=0;i queue[++size]=data; Fl.?*KBz
fixUp(size); V| Fo@
} c)#7T<>*'
} GG>53}7{
^)9/Wz _x
private int size=0; "~ID.G|<
SOR\oZ7
private int[] queue; nqH[ y0
[UXVL}tk
public int get() { 2B$dT=G
return queue[1]; }SWfP5D@
} 9!jF$
bQ>wyA+G&E
public void remove() { %EU_OS(u.{
SortUtil.swap(queue,1,size--); F8?,}5j
fixDown(1); f0g/`j@Up
} FBl,Mky
file://fixdown W\Pd:t
private void fixDown(int k) { IB# ua:
int j; "m^gCN}c
while ((j = k << 1) <= size) { OT\D;Z"__I
if (j < size %26amp;%26amp; queue[j] j++; ynA_Z^j
if (queue[k]>queue[j]) file://不用交换 75;RAKGi
break; Xd:{.AXW
SortUtil.swap(queue,j,k); }T.>p#z
k = j; 5b rM..
} H'3 pHb
} S=P}Jpq?Y;
private void fixUp(int k) { z+.G>0M
while (k > 1) { VL*5
int j = k >> 1; \9,lMK[b
if (queue[j]>queue[k]) OulRqbL2
break; 2T*kmDp
SortUtil.swap(queue,j,k); "*#f^/LS
k = j; eWqS]cM#
} \{<ml n
} D-@6 hWh~
#tZ!D^GQHq
} 6%p6BK6
^ q ba<#e
} di_UJ~
fZf>>mu@r'
SortUtil： H%m^8yW1
X$==J St
package org.rut.util.algorithm; {P?Ge
8#$HKWUK
import org.rut.util.algorithm.support.BubbleSort; BD]J/o
import org.rut.util.algorithm.support.HeapSort; KLM6#6`
import org.rut.util.algorithm.support.ImprovedMergeSort; z#RwgSPw6
import org.rut.util.algorithm.support.ImprovedQuickSort; MX~h>v3_R4
import org.rut.util.algorithm.support.InsertSort; 1^o})9
import org.rut.util.algorithm.support.MergeSort; 2n>mISy+
import org.rut.util.algorithm.support.QuickSort; !jl^__ .DR
import org.rut.util.algorithm.support.SelectionSort; I`B ZZ-
import org.rut.util.algorithm.support.ShellSort; W= NX$=il
EUt2S_2P
/** z}J~X%}e
* @author treeroot !Yo2P"
* @since 2006-2-2 _K?v^oM#
* @version 1.0 -ioO8D&!
*/ gAvNm[=wD2
public class SortUtil { :@&e~QP(
public final static int INSERT = 1; 2A
public final static int BUBBLE = 2; ~L&z?'V
public final static int SELECTION = 3; |goBIp[
public final static int SHELL = 4; Ow?~+) 4
public final static int QUICK = 5; a?Fz&BE
public final static int IMPROVED_QUICK = 6; 1y[~xxgE
public final static int MERGE = 7; R|Bi%q|4P
public final static int IMPROVED_MERGE = 8; t@lTA>;U@
public final static int HEAP = 9; " AvEo
o&q:b9T
public static void sort(int[] data) { MA tF,
sort(data, IMPROVED_QUICK); wIRU!lIF9
} dW/(#KP/+
private static String[] name={ )%Xp?H_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TQt[he$O
}; d^?e*USh
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private static Sort[] impl=new Sort[]{ UBv#z&@[
new InsertSort(), H '5zl^8I
new BubbleSort(), -"yma_
new SelectionSort(), -GL.8"c[
new ShellSort(), b6e2a/x
new QuickSort(), HHyN\
new ImprovedQuickSort(), <AVWT+,
new MergeSort(), 'GW~~UhdW
new ImprovedMergeSort(), #lFsgb
new HeapSort() 1^hG}#6_
}; s;<]gaonB_
rr1,Ijh{D
public static String toString(int algorithm){ F'<XB~&o
return name[algorithm-1]; 7zQGuGo(
} l66 QgPA
G|&$/]~
public static void sort(int[] data, int algorithm) { %j0c|u
impl[algorithm-1].sort(data); agoMsxI9
} F$v^S+Ch
cPL6(&7
public static interface Sort { l}S96B
public void sort(int[] data); 3 P\4K
} J'#o6Ud
SPTx-b[
public static void swap(int[] data, int i, int j) { =`}|hI
int temp = data; <vg|8-,#m
data = data[j]; Ktuv a3=>N
data[j] = temp; pTQ7woj}
} _NuHz
} 2MXg)GBcU>