[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; 2(5HPRQ
} Knd2s~S
int i1=l; xW`,@a}
int i2=mid+1; B2}|b^'I
for(int cur=l;cur<=r;cur++){ Y!M&8;>
if(i1==mid+1) HzdtR
data[cur]=temp[i2++]; _*(n2'2B
else if(i2>r) =&kd|o/i
data[cur]=temp[i1++]; *|Cmm>z"7
else if(temp[i1] data[cur]=temp[i1++]; :?LUv:G
else Ne6]?\Z
data[cur]=temp[i2++]; !1g2'
} <,r(^Ntz
} G}MJWf Hl
l$j/Ye]
} f$\gm+&hXE
r-Nv<oH;
改进后的归并排序: ~7$NVKE
RtE2%d$JT
package org.rut.util.algorithm.support; =D1%-ym
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import org.rut.util.algorithm.SortUtil; Ucj eB
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/** .?C-J
* @author treeroot JIw=Bs
* @since 2006-2-2 ,U-aZ
* @version 1.0 ;cye 'E
*/ v61'fQ1Qg!
public class ImprovedMergeSort implements SortUtil.Sort { q6xm#Fd'.
3_AVJv ;N
private static final int THRESHOLD = 10; d&z^u.SY
xy/B<.M1
/* p>GTFXEi6
* (non-Javadoc) zjuU*$A4
* Tc{n]TV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "JHdF&
*/ 3&'u7e
public void sort(int[] data) { +\@) 1
int[] temp=new int[data.length]; dnZA+Pa
mergeSort(data,temp,0,data.length-1); y.pwj~s
} ]<9KX} B
h x_,>\@
private void mergeSort(int[] data, int[] temp, int l, int r) { s]tBd!~
int i, j, k; `V(zz
int mid = (l + r) / 2; `pB]_"b
if (l == r) R~=_,JUW
return; ZS@Gt
if ((mid - l) >= THRESHOLD) [;rty<Z^b
mergeSort(data, temp, l, mid); nPAVrDg O
else g~>g])
insertSort(data, l, mid - l + 1); DU@ZLk3
if ((r - mid) > THRESHOLD) %Ls5:Z=
mergeSort(data, temp, mid + 1, r); L?WF[nFR
else G;^},%<
insertSort(data, mid + 1, r - mid); XOk0_[
YlF<S49loC
for (i = l; i <= mid; i++) { YPq4VX,
temp = data; O.ce"5Y^
} nE4?oq
for (j = 1; j <= r - mid; j++) { V l,V
temp[r - j + 1] = data[j + mid]; i4',d#
} {C%#r@6
int a = temp[l]; >EMsBX
int b = temp[r]; .V4w+:i
for (i = l, j = r, k = l; k <= r; k++) { XN*?<s3
if (a < b) { f&z@J,_=
data[k] = temp[i++]; 6}Iu~|5
a = temp; .Mn+Bd4f
} else { eM3-S=R?<g
data[k] = temp[j--]; V>8)1)dF
b = temp[j]; 1c$<z~
} UJ}Xa&*H\
} ZQ&A'(tt4
} %syFHUBw
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/** `PV+.V}
* @param data {iz,iv/U
* @param l AK7IPftlH
* @param i H(MCY3t
*/ GT -(r+u
private void insertSort(int[] data, int start, int len) { F(yx/W>Br_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BdK2I!mm
} xK8n~.T('
} U',.'"m
} j@j%)CCM
} E[z8;A^:0
B4/0t:^I
堆排序： ?iX1;c9
AGH7z
package org.rut.util.algorithm.support; SO~]aFoYt
t *8k3"
import org.rut.util.algorithm.SortUtil; x_C#ALq9
-zzM!1@F
/** k|ol+ 9Z
* @author treeroot zF%'~S0{
* @since 2006-2-2 0<,Q7onDD:
* @version 1.0 +IRr&J*P
*/ pPC_ub
public class HeapSort implements SortUtil.Sort{ 0:,8Ce
X2Z E9b
/* (non-Javadoc) yq?7!X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R%(ww
*/ C4#EN}
public void sort(int[] data) { JTK0#+?
MaxHeap h=new MaxHeap(); #[4MwM3
h.init(data); VcLB0T7m\
for(int i=0;i h.remove(); 01/?
System.arraycopy(h.queue,1,data,0,data.length); 4yk!T
} x/7d!>#;
P ~pC /z
private static class MaxHeap{ &ye,A(4
wRc=;f
void init(int[] data){ Up(Jw-.
this.queue=new int[data.length+1]; Rk1B \L|M
for(int i=0;i queue[++size]=data; ^m3[mY [a
fixUp(size); #Cwzk{p(
} <`'^rCWI?
} &#AK#`&)0i
.7BB*!CP
private int size=0; [P,/J$v^~
%LL*V|
private int[] queue; 4\#!Gv-
|k # ~
public int get() { A7/ R5p
return queue[1]; CdTyUl
} v Ft]n
uSAb
public void remove() { z3RlD"F1
SortUtil.swap(queue,1,size--); 5i 6*$#OM_
fixDown(1); $'9b,- e
} +npcU:(Kg
file://fixdown _li\b-
private void fixDown(int k) { %(EUZu2
int j; i$Rlb5RU
while ((j = k << 1) <= size) { SO}$96
if (j < size %26amp;%26amp; queue[j] j++; H%K,2/Nj
if (queue[k]>queue[j]) file://不用交换 Y|s?9'z
break; cY}Nr#%s@U
SortUtil.swap(queue,j,k); q ;@:,^
k = j; k 5<[N2D|!
} #4WA2EW
} :%#(<@{
private void fixUp(int k) { \~1>%F'op
while (k > 1) { CoZXbTq
int j = k >> 1; <2\4eusk
if (queue[j]>queue[k]) Jkc1ih`^
break; Kg#5 @;
SortUtil.swap(queue,j,k); ?pT\Ft V
k = j; $WOiXLyCk
} DwQaj"1<%
} vd4}b>
K?y!zy
} m[@7!.0=
x8]9Xe:_>O
} rC(-dJkV
a]-.@^:_i
SortUtil： \2rCT~x
G8JwY\
package org.rut.util.algorithm; HxC_nh
Vd8BQB,Q
import org.rut.util.algorithm.support.BubbleSort; .ZK|%VGW
import org.rut.util.algorithm.support.HeapSort; G4jaHpPi
import org.rut.util.algorithm.support.ImprovedMergeSort; B!Ss 35<
import org.rut.util.algorithm.support.ImprovedQuickSort; BjT0mk"P
import org.rut.util.algorithm.support.InsertSort; OV l,o
import org.rut.util.algorithm.support.MergeSort; nFVQOr;
import org.rut.util.algorithm.support.QuickSort; iNTw;ov
import org.rut.util.algorithm.support.SelectionSort; %-Z0OzWe
import org.rut.util.algorithm.support.ShellSort; 2|fN*Wm
(HHVup1f
/** -?8;-h, h
* @author treeroot (IbT5
* @since 2006-2-2 W^c> (d</
* @version 1.0 t/6t{*-w
*/ =uZOpeviQ
public class SortUtil { 9w-V +Nf
public final static int INSERT = 1; ;2m<#~@0
public final static int BUBBLE = 2; S?Y,sl+A:
public final static int SELECTION = 3; !wws9
public final static int SHELL = 4; N6GvzmG#g
public final static int QUICK = 5; `_IgH
public final static int IMPROVED_QUICK = 6; ]M"l-A
public final static int MERGE = 7; ^JDiI7
public final static int IMPROVED_MERGE = 8; mSWh'1]b.~
public final static int HEAP = 9; fbbk;Rq.'3
x)X=sX.
public static void sort(int[] data) { eBD7g-
sort(data, IMPROVED_QUICK); oQrkd:
} T~nmEap
private static String[] name={ ZaCUc Px
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G<1awi
}; xDf<@
6%mFiX
private static Sort[] impl=new Sort[]{ SX$Nef9p
new InsertSort(), zc<C %t[~y
new BubbleSort(), xh7#\m_U8
new SelectionSort(), GEg8\
new ShellSort(), 9(%ptnya
new QuickSort(), &Rgy/1
new ImprovedQuickSort(), E7eOKNVC#
new MergeSort(), =YPvh]][
new ImprovedMergeSort(), P1f?'i?J
new HeapSort() ")l_>y?
}; UB3b
$K)9(DD
public static String toString(int algorithm){ 0|0<[:(hc
return name[algorithm-1]; 8:j8>K*6
} u S$:J:Drx
$-dz1}
public static void sort(int[] data, int algorithm) { 2 {lo
impl[algorithm-1].sort(data); `+~@VZ3m
} LB<,(dyh
l vuoVINEp
public static interface Sort { c}nXMA^^
public void sort(int[] data); L0_qHLY
} +LwE=unS
:y)'_p *l/
public static void swap(int[] data, int i, int j) { <y+8\m
int temp = data; :les 3T}2
data = data[j]; G)A5;u\P9
data[j] = temp; &j@i>(7
} 1*_wJ
} fJ[(zjk