[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; BIwgl@t!>
} lU>)n
int i1=l; B`t)rBy
int i2=mid+1; 0EF,uRb
for(int cur=l;cur<=r;cur++){ S8rW'}XJ=H
if(i1==mid+1) 89?3,k
data[cur]=temp[i2++]; >c~9wv
else if(i2>r) ~{kA) :
data[cur]=temp[i1++]; Uj y6vgU;
else if(temp[i1] data[cur]=temp[i1++]; x`b~ZSNJ%
else `Nxo0Q
data[cur]=temp[i2++]; 6T5A31 Q
} W\ZV0T;<]
} fwz5{>ON]
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} Zi15wE
1D#T+t`[
改进后的归并排序: KR+aY.
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package org.rut.util.algorithm.support; @Wlwt+;fT
}Etd#">
import org.rut.util.algorithm.SortUtil; aH~x7N6!
=2GP^vh
/** T% jjs
* @author treeroot e%5'(V-y,
* @since 2006-2-2 \ZmFH8=|f
* @version 1.0 98<bF{#0WM
*/ h[M6.
public class ImprovedMergeSort implements SortUtil.Sort { AOq9v~)z-
tOp:e KN
private static final int THRESHOLD = 10; ZKiL-^dob
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/* !rN#PF>
* (non-Javadoc) `t/@ L:
* pEqr0Qwh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '=@H2T6=
*/ !nqm ;96
public void sort(int[] data) { C_g"omw40
int[] temp=new int[data.length]; D|8sjp4
mergeSort(data,temp,0,data.length-1); 7J</7\
} ;NN(CKZ9A
Q:Nwy(,I
private void mergeSort(int[] data, int[] temp, int l, int r) { 2!"\;/
int i, j, k; O_%PBgcJr
int mid = (l + r) / 2; @pEO@bbg>
if (l == r) EzeDShN=J
return; 9cx!N,R t
if ((mid - l) >= THRESHOLD) VAG+y/q
mergeSort(data, temp, l, mid); d%[`=fs]|m
else (,)vak&t
insertSort(data, l, mid - l + 1); ]CtoK%k
if ((r - mid) > THRESHOLD) e-duZ o
mergeSort(data, temp, mid + 1, r); DftGy:Ah3
else 0wa!pE"
insertSort(data, mid + 1, r - mid); (tz_D7c$F
d >wmg*J
for (i = l; i <= mid; i++) { xSMp[j
temp = data; SBYMDKZ
} WEY97_@
for (j = 1; j <= r - mid; j++) { xs83S.fHg
temp[r - j + 1] = data[j + mid]; !xx> lX5
} \p=W4W/
int a = temp[l]; `!>dbR&1
int b = temp[r]; Jr*S2z<*
for (i = l, j = r, k = l; k <= r; k++) { U{:(j5m
if (a < b) { Z2pN<S{5
data[k] = temp[i++]; \w@_(4")Qb
a = temp; Rs(CrB/M
} else { H--*[3".
data[k] = temp[j--]; q4#f *]
b = temp[j]; O+UV\
} Eg-Mm4o
} 6pdl,5[x-
} Lb3K};SIV
2 vJ[vsrFv
/** +e3WwUx
* @param data o-e,
* @param l [C~)&2wh>
* @param i ^Hhw(@`qf
*/ %JA&O
private void insertSort(int[] data, int start, int len) { >[P7Zlwv4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ws=9u-
} GVHfN5bTqn
} +68K[s,FD
} ~)_ ?:.Da
} "!_ 4%z-
94k)a8-!
堆排序： {-7yZ]OO$
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package org.rut.util.algorithm.support; MnrGD>M@|
Z!=Pc$?
import org.rut.util.algorithm.SortUtil; D A)0Y_
bCx1g/
/** cTIwA:)D
* @author treeroot CTrs\G
* @since 2006-2-2 BQJ`vIa
* @version 1.0 D``NQ`>A
*/ *e"GQd?
public class HeapSort implements SortUtil.Sort{ X!A]V:8dk
sz2SWk^&
/* (non-Javadoc) r/$)c_x`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 22|M{
*/ 7[.Q.3FL
public void sort(int[] data) { i11GW
MaxHeap h=new MaxHeap(); <W[8k-yOV`
h.init(data); sq6%=(q(?
for(int i=0;i h.remove(); {'Qk>G s
System.arraycopy(h.queue,1,data,0,data.length); (l!D=qy
} -O>mY)
mP .&fS
private static class MaxHeap{ dK(%u9v
j{w,<Wt>
void init(int[] data){ eYX_V6c
this.queue=new int[data.length+1]; ~m09yc d<
for(int i=0;i queue[++size]=data; V1b_z
fixUp(size); }ok nB
} t~W4o8<w
} %oL&~6l$
\t(r@qq
private int size=0; a=T7w;\h
0}7Rm>
private int[] queue; jl0Eg
r-Xe<|w
public int get() { xS-nO_t 'E
return queue[1]; Nb9V/2c;V
} OVo
x^#{2}4u
public void remove() { .dLX'84fY
SortUtil.swap(queue,1,size--); e2o9)=y
fixDown(1); DW%K'+@M
} ?9okjLp1n
file://fixdown D}/.;]w<[&
private void fixDown(int k) { gx9sBkoq5D
int j; *]| JX&
while ((j = k << 1) <= size) { T2PFE4+Dp
if (j < size %26amp;%26amp; queue[j] j++; V5@[7ncVf
if (queue[k]>queue[j]) file://不用交换 ue:P#] tx
break; vKOn7
SortUtil.swap(queue,j,k); 6{r[Dq
k = j; /ZN5WK
} AdS_-Cm
} sU_4+Mk
private void fixUp(int k) { ]fS~N9B
while (k > 1) { &OR*r7*Z
int j = k >> 1; ,) jB<`
if (queue[j]>queue[k]) WHavz0knf[
break; wQS w&G
SortUtil.swap(queue,j,k); $ 5-2cL
k = j; @`*YZq>p
} L , Fso./y
} 2u H\8A+'f
[_G0kiI}W"
} VP[!ji9P
5$Q`P',*Ua
} im[gbac
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SortUtil： <).qe Z
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package org.rut.util.algorithm; :+^llz
>b](v)
import org.rut.util.algorithm.support.BubbleSort; =0fx6V
import org.rut.util.algorithm.support.HeapSort; 959jp85
import org.rut.util.algorithm.support.ImprovedMergeSort; <l/Qf[V
import org.rut.util.algorithm.support.ImprovedQuickSort; s/0FSv x
import org.rut.util.algorithm.support.InsertSort; >:nJTr
import org.rut.util.algorithm.support.MergeSort; R:m=HS_
import org.rut.util.algorithm.support.QuickSort; QD VA*6F
import org.rut.util.algorithm.support.SelectionSort; D)cwttH
import org.rut.util.algorithm.support.ShellSort; #@"rp]1xv
>ZsK5v
/** +Z(VWu6
* @author treeroot #X_M
* @since 2006-2-2 {v/6|
* @version 1.0 <rmV$_
*/ @<JQn^M
public class SortUtil { 4DM|OL`w
public final static int INSERT = 1; vrx3O
public final static int BUBBLE = 2; CnA)>4E*'
public final static int SELECTION = 3; emIbGkH
public final static int SHELL = 4; Pg C]@Q%
public final static int QUICK = 5; n:)Y'52}
public final static int IMPROVED_QUICK = 6; {X"]92+
public final static int MERGE = 7; dg8\(G
public final static int IMPROVED_MERGE = 8; E?o8'r
public final static int HEAP = 9; pra&A2Y\
+mv%z3"j;
public static void sort(int[] data) { r:Cid*~m
sort(data, IMPROVED_QUICK); \1_&?(pU
} [M>_(u6
private static String[] name={ [+7X&B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [kkcV5I-
}; n}kz&,
D|#(zjl@
private static Sort[] impl=new Sort[]{ &g>+tkC
new InsertSort(), '2{o_<m
new BubbleSort(), nE%qm -
new SelectionSort(), V7i`vo3Cc
new ShellSort(), }}R!Y)
new QuickSort(), {0{$.L
new ImprovedQuickSort(), rrRC5h
new MergeSort(), "evV/Fg(
new ImprovedMergeSort(), 5LH ]B
new HeapSort() >9|+F[Fc
}; )Q?[_<1Y+
lI<8)42yq
public static String toString(int algorithm){ G<1mj!{Vp
return name[algorithm-1]; Xq^{P2\w1
} " N4]e/.V
niBpbsO
public static void sort(int[] data, int algorithm) { L]")TQ
impl[algorithm-1].sort(data); 4`]1W,t
} 1_]l|`Po
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public static interface Sort { "ET"dMxU
public void sort(int[] data); #JM*QVzv
} .JjuY'-Q
biK.HL\V
public static void swap(int[] data, int i, int j) { &|*|
int temp = data; >X)G`N@!
data = data[j]; H>9$L~
data[j] = temp; =Ybu_>
} aQ\O ]gCE
} _?<Fc8F