[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; [t,7H
} l^&#fz
int i1=l; V7 c7(G
int i2=mid+1; z )k\p'0"
for(int cur=l;cur<=r;cur++){ i5|!MIY
if(i1==mid+1) M7En%sBp
data[cur]=temp[i2++]; 7Sr7a{
else if(i2>r) pnDD9u-4;
data[cur]=temp[i1++]; Cvq2UNz(R
else if(temp[i1] data[cur]=temp[i1++]; "M2HiV
else AOeptv^k3}
data[cur]=temp[i2++]; 3TO$J
} !x|Ok'izDL
} <1V!-D4xu
O7:JG[tR*
} Haiuf)a
a&|aK+^8;
改进后的归并排序: 6EJ,czt(
Q;SMwCB0M
package org.rut.util.algorithm.support; HJM-;C](
]*Zg(YA
import org.rut.util.algorithm.SortUtil; jF{zcYU
Z&YW9de@
/** u|APx8?"o
* @author treeroot N}Z"$4
* @since 2006-2-2 {B uh5U,
* @version 1.0 )9J&M6LX
*/ 'Aai.PE:
public class ImprovedMergeSort implements SortUtil.Sort { t<x0?vfD
HLa|ycB%
private static final int THRESHOLD = 10; T+RfMEdr
;L++H5Kz6
/* Kp8!^os
* (non-Javadoc) W|; .G9
* vY:A7yGW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h9RG?r1
*/ O0c#-K.f
public void sort(int[] data) { oj[Wzeg%
int[] temp=new int[data.length]; a";(C,:0
mergeSort(data,temp,0,data.length-1); &.;tdT7
} A)&OR]0[
UC3?XoT\
private void mergeSort(int[] data, int[] temp, int l, int r) { o%5^dX&[
int i, j, k; 2t*@P"e!
int mid = (l + r) / 2; "\U$aaF
if (l == r) >kd&>)9v
return; O8r9&Nv
if ((mid - l) >= THRESHOLD) wSBDJvI
mergeSort(data, temp, l, mid); v4DF #O
else ZWxq<&Cg
insertSort(data, l, mid - l + 1); rhsSV3iM
if ((r - mid) > THRESHOLD) Z@=#ry
mergeSort(data, temp, mid + 1, r); l+Uy
else :6./yj(
insertSort(data, mid + 1, r - mid); d7qHUx'=z
N)WAzH
for (i = l; i <= mid; i++) { xm6cn\e
temp = data; 8$BZbj%?hx
} ZV$qv=X
for (j = 1; j <= r - mid; j++) { /9QI^6&SX
temp[r - j + 1] = data[j + mid]; $ohIdpZLH2
} e>=P'
int a = temp[l]; M9[Fx= qY
int b = temp[r]; |ffM6W1:
for (i = l, j = r, k = l; k <= r; k++) { -tlRe12
if (a < b) { D}r,t_]Eb
data[k] = temp[i++]; bT2b)nf
a = temp; 2r^|
} else { hqmKUlo
data[k] = temp[j--]; 5\A[ra
b = temp[j]; {Ug?k<h7|
} ^duNEu0*
} ,nD:W
} @YHB>rNf(7
6V KsX+sd
/** Uo#%f+t
* @param data MD%_Z/NL
* @param l t-)C0<
* @param i l}A8
*/ K1AI:$H
private void insertSort(int[] data, int start, int len) { G>qzAgA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GNlP]9wX
} w(zlHj
} S~.:B2=5K
} nb9qVuAGU
} ^w/_hY!4/
qM~ev E$%
堆排序： SxdH%agM
/pt%*;H
package org.rut.util.algorithm.support; NjIe2)}'
8%nb1CA
import org.rut.util.algorithm.SortUtil; .^6"nnfA#
2;VggPpT
/** Z?kLAhy!
* @author treeroot C: @T5m
* @since 2006-2-2 WLma)L`L
* @version 1.0 9 ,=7Uh#7
*/ -{dsl|Dl
public class HeapSort implements SortUtil.Sort{ XbsEO>_Z'A
{7LO|E}7
/* (non-Javadoc) jO)UK.H#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &`[y]E'
*/ </3Shq
public void sort(int[] data) { ]([:"j
MaxHeap h=new MaxHeap(); 4mq+{c0
h.init(data); rLw3\>y
for(int i=0;i h.remove(); n7>CK?25
System.arraycopy(h.queue,1,data,0,data.length); 6r4o47_t8#
} S-&[Tp+N
q-P$ \":
private static class MaxHeap{ uDJi2,|n
rnz9TmN:*1
void init(int[] data){ - |n\
this.queue=new int[data.length+1]; .{%~4$yu7
for(int i=0;i queue[++size]=data; gDU~hv
fixUp(size); t84(kzcC
} _C$JO
} 1bs8fUPB3
`OO=^.-u
private int size=0; ~0aWjMc(>
]:m>pI*z.
private int[] queue; d~1Nct$:
pCS2sq8RC
public int get() { 6m"_=.k%
return queue[1]; %T4htZa
} 0vbiq
u;rK.3o
public void remove() { uKHkC.g
SortUtil.swap(queue,1,size--); Y>LgpO.
fixDown(1); E~Eh'>Y(B
} +Bk" khH
file://fixdown |d\rCq >
private void fixDown(int k) { l ps 6lnh
int j; VDq4n;p1
while ((j = k << 1) <= size) { k$1ya7-@
if (j < size %26amp;%26amp; queue[j] j++; H. UwM
if (queue[k]>queue[j]) file://不用交换 W|XTa
break; E#?*6/
SortUtil.swap(queue,j,k); S(<r-bV<
k = j; %upnXRzw
} EkS7j>:
} hyqsMkW|
private void fixUp(int k) { !m)P*Lw
while (k > 1) { >Q':+|K}
int j = k >> 1; jkw:h0hX
if (queue[j]>queue[k]) <+ 0cQq=2
break; \W$bOp
SortUtil.swap(queue,j,k); ENW>bS8e`
k = j; =@$G3DM
} EooQLZ
} p""#Gbwj
~Vq<nkWS
} e]R`B}vO
\-3\lZ3qj
} D5x }V
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SortUtil： mGR}hsQpn
}`M53>C,gQ
package org.rut.util.algorithm; /Qi;'h]
3NRxf8
import org.rut.util.algorithm.support.BubbleSort; mNS7/I\
import org.rut.util.algorithm.support.HeapSort; o;bK 7D
import org.rut.util.algorithm.support.ImprovedMergeSort; 3~ITvH,`s
import org.rut.util.algorithm.support.ImprovedQuickSort; ]4f;%pE
import org.rut.util.algorithm.support.InsertSort; <j"}EEb^
import org.rut.util.algorithm.support.MergeSort; m:|jv|f
import org.rut.util.algorithm.support.QuickSort; ue8Cpn^M
import org.rut.util.algorithm.support.SelectionSort; NMq#D$T
import org.rut.util.algorithm.support.ShellSort; $OOZ-+8
vpR^G`/
/** $t.i)wg +
* @author treeroot ^3B)i=
* @since 2006-2-2 &<8Q/m]5
* @version 1.0 H{Tt>k
*/ <X9 T}g
public class SortUtil { {.c(Sw}Eo
public final static int INSERT = 1; *h6Lh]7
public final static int BUBBLE = 2; wcz|Zy
public final static int SELECTION = 3; pm$ZKM
public final static int SHELL = 4; pE.f}
public final static int QUICK = 5; :C6
public final static int IMPROVED_QUICK = 6; 6b1f?0
public final static int MERGE = 7; BZAeg">3
public final static int IMPROVED_MERGE = 8; 6f1%5&si
public final static int HEAP = 9; Fl{:aq"3
g3[Zh=+]E
public static void sort(int[] data) { P2J{Ml#
sort(data, IMPROVED_QUICK); Exir?G}\
} 3exv k
private static String[] name={ D4 {?f<G0F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "JI FF_
}; 5)X;q-
ZI"L\q=|0#
private static Sort[] impl=new Sort[]{ _-/aMfyQ
new InsertSort(), S |SN3)
new BubbleSort(), IHqY/j
new SelectionSort(), Kjbt1n
new ShellSort(), eZDqW)x
new QuickSort(), :B(F?9qK
new ImprovedQuickSort(), o+(>/Ou
new MergeSort(), ~x<nz/^
new ImprovedMergeSort(), s|iph~W!L
new HeapSort() m8KJ~02l#
}; !]c]:ed\C
v=!Ap ; 2L
public static String toString(int algorithm){ +Kc1a;
return name[algorithm-1]; ]L0GIVIE
} Tj &PB_v1
{v&c5B~,\
public static void sort(int[] data, int algorithm) { #hinb[fQ
impl[algorithm-1].sort(data); D(3\m)
} jDI)iW`P
8#%Sq=/+M
public static interface Sort { Nxk3uF^
public void sort(int[] data); 4o,%}bo&
} HQi57QB
>7@kwj-f)
public static void swap(int[] data, int i, int j) { $Pa7B]A,Ae
int temp = data; uK6_HvHuy
data = data[j]; 3f'dBn5
data[j] = temp; 3$Ecq|4J:
} .Q'/e>0
} Wxjv=#3