[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; "hbCP4
} |7$Q'3V
int i1=l; L2Vj2o"x?
int i2=mid+1; +{r~-Rn3
for(int cur=l;cur<=r;cur++){ +$;#bw)yH
if(i1==mid+1) BwJL)$D<S
data[cur]=temp[i2++]; 9OS~;9YR
else if(i2>r) zMg(\8
data[cur]=temp[i1++]; /a .XWfu
else if(temp[i1] data[cur]=temp[i1++]; 9<|nJt
else l:.q1UV
data[cur]=temp[i2++]; 1C5~GI`
} '}N4SrU$
} N0V`xrS
N|3a(mtiZ'
} '3uN]-A>D
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改进后的归并排序: qy( kb(J
3P|z`}Ka
package org.rut.util.algorithm.support; n|'}W+
aInh?-
import org.rut.util.algorithm.SortUtil; 0PdX>h.t
qCI0[U@
/** 3n)\D<f]#
* @author treeroot (Rs|"];?Z
* @since 2006-2-2 VD90JU]X<
* @version 1.0 vWZ?*0^
*/ w\}Q.$@
public class ImprovedMergeSort implements SortUtil.Sort { C>*1f|<
tL\L4>^7T
private static final int THRESHOLD = 10; J] )gXVRM
qM(@wFg
/* C5^9D
* (non-Javadoc) BMH?BRi
* q!as~{!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +EvY-mwfQ
*/ bE%*ZB
public void sort(int[] data) { Jl fIYf~
int[] temp=new int[data.length]; 'R nvQ""
mergeSort(data,temp,0,data.length-1); _}l7f
} 3RP\w~?
W0LJXp-v
private void mergeSort(int[] data, int[] temp, int l, int r) { bmw"-W^U[
int i, j, k; uC5W1LyI
int mid = (l + r) / 2; )E}eK-Yu
if (l == r) VX'G\Zz@h|
return; rds0EZ4W
if ((mid - l) >= THRESHOLD) )vD|VLV
mergeSort(data, temp, l, mid); [g@.dr3t
else ADT8A."R[
insertSort(data, l, mid - l + 1); Jzj>=jWX@
if ((r - mid) > THRESHOLD) Ze3sc$fG2
mergeSort(data, temp, mid + 1, r); 6G;t:[H G
else a!mdL|eA@
insertSort(data, mid + 1, r - mid); VcORRUp
uE&2M>2
for (i = l; i <= mid; i++) { |K'7BK_^J
temp = data; f=Kt[|%'e
} Yzih-$g
for (j = 1; j <= r - mid; j++) { ZWy,NN1
temp[r - j + 1] = data[j + mid]; D*q:XO6b
} vf h*`G$
int a = temp[l]; Wq/0}W.
int b = temp[r]; %s#`Z [8,
for (i = l, j = r, k = l; k <= r; k++) { 4/QQX;w
if (a < b) { 4 moVS1
data[k] = temp[i++]; 3.D|xE]g
a = temp; l~$Od jf
} else { oU)HxV
data[k] = temp[j--]; g?e-D.pSF
b = temp[j]; <j^"=UN4#
} k4BiH5\hA
} W=?s-*F[~
} |3uE"\nfA
Yc~c(1VRz
/** H^0`YQJ3
* @param data 82~ZPZG
* @param l mx")cGGQ
* @param i `yWWX.`
*/ f*GdHUZ*
private void insertSort(int[] data, int start, int len) { etLA F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =U<6TP]{
} \:d|'r8OCM
} * 57y.](w
} {-kV~p
} +}@6V4BRn
2_#Vw&v
堆排序： h]#bPb
]WP[hF
package org.rut.util.algorithm.support; E/N*n!sV
/Jw65 e
import org.rut.util.algorithm.SortUtil; 3~z4#8=
lhw]?\
/** >ygyPl ;1s
* @author treeroot ]W7(}~m
* @since 2006-2-2 Y]/(R"-2G
* @version 1.0 IMIZ#/
*/ F's($n
public class HeapSort implements SortUtil.Sort{ /=w9bUj5v
5!$m3j_,]?
/* (non-Javadoc) )f-ux5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _QbLg"O
*/ ;>QED
public void sort(int[] data) { <h^'x7PkW5
MaxHeap h=new MaxHeap(); 1@q~(1-o
h.init(data); 9r-]@6;
for(int i=0;i h.remove(); py`RH)
System.arraycopy(h.queue,1,data,0,data.length); ePdM9%
} eZ5UR014
xx0s`5
private static class MaxHeap{ Vo}3E]
'\\dh
void init(int[] data){ 'bGL@H
this.queue=new int[data.length+1]; Ug_5INK
for(int i=0;i queue[++size]=data; !-b4@=f:
fixUp(size); mt3j- Mw
} La48M'u
} K&0op 4&
|!{Q4<
private int size=0; 5%"${ywI
/tl/%:U*.
private int[] queue; s,m+q)
G,M &z>ub0
public int get() { e`zEsLs@
return queue[1]; 5QB]2c^
} O=LS~&=,
x?Z)q4
public void remove() { G7 >
SortUtil.swap(queue,1,size--); !Rk1q&U5
fixDown(1); _=E))Kp{z
} g\)+ LX
file://fixdown 2K<rK(
private void fixDown(int k) { Cj%SW <v|
int j; W/ZmG]sZE
while ((j = k << 1) <= size) { Be}e%Rk
if (j < size %26amp;%26amp; queue[j] j++; B!GpD@U
if (queue[k]>queue[j]) file://不用交换 v1<gNb)`
break; Y(GH/jw
SortUtil.swap(queue,j,k); 4O_z|K_k|
k = j; @3KVYv,q
} E0[!jZ:c
} ;tTM3W-h
private void fixUp(int k) { B04%4N.g"X
while (k > 1) { UgDai?b1
int j = k >> 1; jUtrFl
if (queue[j]>queue[k]) 9\i;zpN\
break; TEz)d=
SortUtil.swap(queue,j,k); cnvxTI<
k = j; ^tX+<X
} n4\6\0jq6
} " ] 0ER
xal,j*
} {`QF(WL
#<f}.P.Uc
} Yf.H$L
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SortUtil： vLn<=.
;wND?:
package org.rut.util.algorithm; 0h!2--Aur
S+>&O3m
import org.rut.util.algorithm.support.BubbleSort; MK9?81xd
import org.rut.util.algorithm.support.HeapSort; g`)3m,\
import org.rut.util.algorithm.support.ImprovedMergeSort; qY\zZ
import org.rut.util.algorithm.support.ImprovedQuickSort; g0I<Fan
import org.rut.util.algorithm.support.InsertSort; &N1C"Eov?
import org.rut.util.algorithm.support.MergeSort; B[ae<V0k
import org.rut.util.algorithm.support.QuickSort; ONJW*!(
import org.rut.util.algorithm.support.SelectionSort; ,{ CgOz+Ul
import org.rut.util.algorithm.support.ShellSort; b0X*+q
mXlXB#N
/** @iB**zR/
* @author treeroot 4LARqSmt
* @since 2006-2-2 V\ch0i 1
* @version 1.0 ^!k^=ST1J
*/ Y>t*L#i
public class SortUtil { K4SR`Q
public final static int INSERT = 1; RBr
public final static int BUBBLE = 2; U#G uB&V
public final static int SELECTION = 3; acB,u&
public final static int SHELL = 4; OzBo*X/p
public final static int QUICK = 5; <kn#`w1U'
public final static int IMPROVED_QUICK = 6; WzgzI/
public final static int MERGE = 7; JiZ9ly(G
public final static int IMPROVED_MERGE = 8; (HLy;^#R
public final static int HEAP = 9; ;w4rwL
OTtSMO
public static void sort(int[] data) { iJ42` 51
sort(data, IMPROVED_QUICK); hw_7N)}
} >IfJ.g"
private static String[] name={ Wr`=P,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ':[+UUC@
}; [#j|TBMHM
,!kyrk6
private static Sort[] impl=new Sort[]{ 9L%&4V}BIS
new InsertSort(), 5gF}7D@
new BubbleSort(), kSU*d/}*u
new SelectionSort(), z-[Jbjhd
new ShellSort(), aEXV^5;,pJ
new QuickSort(), DetBZ.
new ImprovedQuickSort(), Y+upZ@Ga
new MergeSort(), wVE"nN#
new ImprovedMergeSort(), "$0f.FO:i
new HeapSort() a6WE,4T9
}; rC_K L
=6
public static String toString(int algorithm){ _?kf9.
return name[algorithm-1]; \nkqp
} ZI}m~7
2:pq|eiF
public static void sort(int[] data, int algorithm) { b@1QE
impl[algorithm-1].sort(data); 2#/ KS^
} uO[4 WZ
]qVJ>
public static interface Sort { = 1}-]ctVn
public void sort(int[] data); 5R"b1
} W:rzfO.`Z
3M1(an\nW
public static void swap(int[] data, int i, int j) { Pv1psKu
int temp = data; {B\.8)&8
data = data[j]; lq.0?(
data[j] = temp; Fof_xv9
} \re.KB#R
} @ K@~4!