[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; q1,~
} <YY14p
int i1=l; Xhm c6?
int i2=mid+1; DUS6SO
for(int cur=l;cur<=r;cur++){ SU0 hma8
if(i1==mid+1) ! mHO$bQ"
data[cur]=temp[i2++]; CrLrw T
else if(i2>r) ^sw?gH*
data[cur]=temp[i1++]; ";F'~}bDA
else if(temp[i1] data[cur]=temp[i1++]; i@yC-))bY
else s_Sk0}e
data[cur]=temp[i2++]; ;TYBx24vD'
} Dtk=[;"k2a
} p+eh%2Jm
z_HdISy0
} /xhKd]Q
1#x0q:6
改进后的归并排序: oU8q o-J1H
A"]YM'.
package org.rut.util.algorithm.support; f#;>g
.nJz G
import org.rut.util.algorithm.SortUtil; :X=hQ:>P
>7|VR:U?B
/** Ac@VGT:9
* @author treeroot _)8s'MjA:&
* @since 2006-2-2 jp,4h4C^)
* @version 1.0 K0~rN.C!0
*/ ?4,T}@P
public class ImprovedMergeSort implements SortUtil.Sort { 1?}T=)3+$
DQ3<$0
private static final int THRESHOLD = 10; dN q$}
h{Y",7]!
/* D7Z /H'|
* (non-Javadoc) LVGe]lD
* Xvu(vA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tw;}jh
*/ !0+JbZ<%r|
public void sort(int[] data) { 1M6D3d_
int[] temp=new int[data.length]; a(nlTMfu
mergeSort(data,temp,0,data.length-1); dd;~K&_Q/i
} W1~0_;
sRs>"zAg
private void mergeSort(int[] data, int[] temp, int l, int r) { dV_G1'
int i, j, k; i5Ggf"![
int mid = (l + r) / 2; 23PGq%R
if (l == r) **%37
return; kVgTGC"L=
if ((mid - l) >= THRESHOLD) "jZ-,P=
mergeSort(data, temp, l, mid); fhiM U8(&
else V gWRW7Se
insertSort(data, l, mid - l + 1); Ml_^ `vn
if ((r - mid) > THRESHOLD) o-5TC
mergeSort(data, temp, mid + 1, r); !L(^(;$Kgr
else Cdn J&N{
insertSort(data, mid + 1, r - mid); TjH][bH5
Y2AJ+ |
for (i = l; i <= mid; i++) { [n@] r2g)3
temp = data; x5Bk/e'
} SUiOJ[5,
for (j = 1; j <= r - mid; j++) { >:-$+I
temp[r - j + 1] = data[j + mid]; (`^1Y3&2
} 04ui`-c(
int a = temp[l]; }2jn[${ pr
int b = temp[r]; @d'j zs
for (i = l, j = r, k = l; k <= r; k++) { H_a[)DT
if (a < b) { zhQJy?>'m
data[k] = temp[i++]; 7!1S)dup
a = temp; B,@i
} else { (PLUFT
data[k] = temp[j--]; m O_af
b = temp[j]; cuX)8+
} ch]IzdD
} #a#F,ZT
} KlEpzJ98
7CysfBF0g
/** :WEDAFq0
* @param data sJZiI}Xc
* @param l >4TO=i
* @param i i-1op> Y
*/ t@(HF-4~=
private void insertSort(int[] data, int start, int len) { %{W6PrY{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1MFbQs^
} -).C
} )0`C@um
} =X}J6|>X
} .-zom~N-?
&oNAv-m^GD
堆排序： Rq-ZL{LR7
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package org.rut.util.algorithm.support; ]Wup/o
W/N7vAx X
import org.rut.util.algorithm.SortUtil; 5xiEPh
).O)p9
/** KNl$3nX
* @author treeroot inL(X;@yo
* @since 2006-2-2 "]*tLL:`
* @version 1.0 0-gAyiKx?
*/ @7}W=HB
public class HeapSort implements SortUtil.Sort{ >P(.:_^p
Uo49*Mr
/* (non-Javadoc) ?,/ }`3Vw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (3e2c
*/ kJU2C=m@e2
public void sort(int[] data) { " bG2:
MaxHeap h=new MaxHeap(); u8^lB7!e/
h.init(data); `[A];]
for(int i=0;i h.remove(); *CMx-_
System.arraycopy(h.queue,1,data,0,data.length); ;uW FHc5@B
} (FV >m
(7Qo
private static class MaxHeap{ hH.G#-JO
BtZyn7a
void init(int[] data){ sW$XH1Uf#
this.queue=new int[data.length+1]; 0RfZEG)
for(int i=0;i queue[++size]=data; u*R_\*j@
fixUp(size); \V:^h[ad
} z:O8Ls^\T
} pg.%Pdr<$
]e3Ax(i)
private int size=0; DG/Pb)%Y
okXl8&mi
private int[] queue; 9WHddDA
HW|IILFB
public int get() { [ ~,AfY
return queue[1]; kAx4fE[c
} b>k y
M|-)GvR$J
public void remove() { N`i/mP
SortUtil.swap(queue,1,size--); fA-7VdR`R
fixDown(1); 2%1hdA<
} pAEx#ck
file://fixdown ~[: 2I
private void fixDown(int k) { t^HRgY'NjM
int j; *j=% #
while ((j = k << 1) <= size) { GbyJ:
if (j < size %26amp;%26amp; queue[j] j++; Ac6=(B
if (queue[k]>queue[j]) file://不用交换 %y@AA>x!
break; ysN3
SortUtil.swap(queue,j,k); 2c}E(8e]
k = j; Rcv9mj]l
} <3iMRe
} 0(Ij%Wi,
private void fixUp(int k) { )jj0^f1!j
while (k > 1) { J,G lIv.A
int j = k >> 1; c> af
if (queue[j]>queue[k]) GILfbNcd
break; }G=M2V<L
SortUtil.swap(queue,j,k); X]=t>
k = j; $e\M_hp*J
} `/g UV
} [lAp62i5
m|# y >4
} NI5``BwpO
n%-0V>
} PFR:>^wK2
0V]s:S
SortUtil： l%ZhA=TKQ
tkhCw/
package org.rut.util.algorithm; YqG7h,F
]4{H+rw
import org.rut.util.algorithm.support.BubbleSort; 67TwPvh
import org.rut.util.algorithm.support.HeapSort; +(*DT9s+
import org.rut.util.algorithm.support.ImprovedMergeSort; iE{&*.q_}>
import org.rut.util.algorithm.support.ImprovedQuickSort; _|p8M!
import org.rut.util.algorithm.support.InsertSort; j|n R"!
import org.rut.util.algorithm.support.MergeSort; OSJ$d
import org.rut.util.algorithm.support.QuickSort; 598i^z{~0%
import org.rut.util.algorithm.support.SelectionSort; Al'3?
import org.rut.util.algorithm.support.ShellSort; ZuIefMiG~+
uEYtE7
/** tgaO!{9I?
* @author treeroot u>$t'
* @since 2006-2-2 X8|EHb<
* @version 1.0 xPgBV~
*/ `6YN3XS
public class SortUtil { K^$=dLp
public final static int INSERT = 1; ':W[A
public final static int BUBBLE = 2; HDKbF/
public final static int SELECTION = 3; ] - .aL
public final static int SHELL = 4; b[yiq$K/
public final static int QUICK = 5; 7rA;3?p)
public final static int IMPROVED_QUICK = 6; 8Y3I0S
public final static int MERGE = 7; y]imZ4{/
public final static int IMPROVED_MERGE = 8; +RXoi2"-q@
public final static int HEAP = 9; Wm|lSisY
eFAnFJ][L
public static void sort(int[] data) { "j-CZ\]U|
sort(data, IMPROVED_QUICK); r/sNrB1U"y
} HThcn1u~^b
private static String[] name={ H-%v3d>3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q=G+Tocv
}; G`zm@QL
.2pK.$.
private static Sort[] impl=new Sort[]{ 2%>FR4a
new InsertSort(), j9,P/K$:w
new BubbleSort(), K#xvu1U
new SelectionSort(), 6#yUc_5 \
new ShellSort(), P$sxr
new QuickSort(), AEuG v}#
new ImprovedQuickSort(), m4& /s
new MergeSort(), 2(nlJ7R
new ImprovedMergeSort(), fLVAKn
new HeapSort() bfO=;S]b!
}; `kr?j:g
a>)f=uS
public static String toString(int algorithm){ w:l"\Tm
return name[algorithm-1]; <or2
} W l16`9
.KC++\{HE
public static void sort(int[] data, int algorithm) { yBRC*0+Vy
impl[algorithm-1].sort(data); m3ff;,
} {^'HL
4~=l}H>&
public static interface Sort { J=L5=G7(
public void sort(int[] data); ?}7p"3j'z
} -F92-jBM4
66 Tpi![
public static void swap(int[] data, int i, int j) { 7?t6UPf
int temp = data; ^J d r>@
data = data[j]; v@Ox:wl>
data[j] = temp; zT[!o j7
} smLQS+UE
} LF7SS;&~f