[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; 6Xa2A6
} :0l(Ll KD
int i1=l; ))vwofkw4
int i2=mid+1; go@}r<B$
for(int cur=l;cur<=r;cur++){ t&0p@xLQ
if(i1==mid+1) iJK9-k~
data[cur]=temp[i2++]; ~a}pYLxl
else if(i2>r) 4KKNw9L)
data[cur]=temp[i1++]; d:aQlW;}
else if(temp[i1] data[cur]=temp[i1++]; 8~bPoWP
else 3ml|`S
data[cur]=temp[i2++]; HD>{UU?
} utXcfKdt
} i8]r}a
!WmpnPr1
} w@4+&v>O
@9L9c
改进后的归并排序: \]D;HR`vo
!}%giF$-
package org.rut.util.algorithm.support; [ kknY+n1
{+ m)*3~w
import org.rut.util.algorithm.SortUtil; K:0RP?L
h0`)=
/** "T'!cy
* @author treeroot x+&&[>-P
* @since 2006-2-2 Jg:'gF]jt
* @version 1.0 q&.!*rPD
*/ 6m]L{ buP
public class ImprovedMergeSort implements SortUtil.Sort { J';tpr
*e R$
private static final int THRESHOLD = 10; mMR[(
Qj~0vx!
/* pGC`HTo|
* (non-Javadoc) Mm5l>D'c
* *VpQ("
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]PFc8qv{
*/ fAK
public void sort(int[] data) { +1Uw<~
int[] temp=new int[data.length]; !(]|!F[m
mergeSort(data,temp,0,data.length-1); S'WmPv
} _MR2,mC
(- uk[["3
private void mergeSort(int[] data, int[] temp, int l, int r) { a36<S0R
int i, j, k; 9:Y\D.M
int mid = (l + r) / 2; 5]{YERa'
if (l == r) C'Ymz`iQ
return; v-kH7H"z
if ((mid - l) >= THRESHOLD) ~ M"[FYw[
mergeSort(data, temp, l, mid); +$9w[ARN+
else }K/[3X=B
insertSort(data, l, mid - l + 1); Av'H(qB\K
if ((r - mid) > THRESHOLD) 4DNZ y2`
mergeSort(data, temp, mid + 1, r); I|.B-$gH
else ,Ubnz
insertSort(data, mid + 1, r - mid); /xmd]XM=_
dZm{?\^_
for (i = l; i <= mid; i++) { a8N!jQc_m
temp = data; 1ayxE(vMcX
} mHP1.Z`
for (j = 1; j <= r - mid; j++) { D@Q|QY5qic
temp[r - j + 1] = data[j + mid]; b`2~
} =($qiL'h
int a = temp[l]; c/s'&gG33z
int b = temp[r]; k`?n("j
for (i = l, j = r, k = l; k <= r; k++) { eRf8'-"#-
if (a < b) { +5Mx0s(5
data[k] = temp[i++]; w9 NUm
a = temp; Y3thW@mD05
} else { }>j$Wr_h
data[k] = temp[j--]; O&)Y3O1
b = temp[j]; 33; ytd
} Nb$)YMbA
} 5=dg4"b]
} !vsUL-
0ul2rZc
/** Pvtf_Qo^
* @param data Z/0M9 Q%
* @param l >Nov9<p
* @param i R(:q^?
*/ FnCHbPlb
private void insertSort(int[] data, int start, int len) { `aJ[ !O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2@ad!h
} ,+JAwII>O
} ;c'jBi5W
} F8pLA@7[
} | o?@Eh
/5o~$S
堆排序： "e(Nh%t
@M(vaJB8u
package org.rut.util.algorithm.support; , w_Ew
shi#K<gVC
import org.rut.util.algorithm.SortUtil; eVy,7goh
9;@6iv
/** uto4bs:
* @author treeroot old}}>_
* @since 2006-2-2 +pE-Yn`YS
* @version 1.0 O9qEKW)a
*/ vX{]_
public class HeapSort implements SortUtil.Sort{ $GcVC (]
`'g%z: ~
/* (non-Javadoc) e]rWR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5r.{vQ
*/ K(_nfE{
public void sort(int[] data) { [1E u6X6
MaxHeap h=new MaxHeap(); nJ6bC^*)U
h.init(data); ub-ZrC'
for(int i=0;i h.remove(); UCl,sn
System.arraycopy(h.queue,1,data,0,data.length); Q4UaqiL
} $FD0MrB_+
YS;Ql\4
private static class MaxHeap{ 1X=}
1(m89C[
void init(int[] data){ nzU@}/A/
this.queue=new int[data.length+1]; ATwPfo8jx@
for(int i=0;i queue[++size]=data; KF-n_:Bd+
fixUp(size); E")82I
} #wt#-U;
} 7^ER?@:W
or0f%wAF
private int size=0; t,&1~_9
x;kW }U
private int[] queue; /Wt<[g#
A_CK,S*\,&
public int get() { S25&UwUw
return queue[1]; kMK-E<g
} G6L'RP
h_H$+!Nzb
public void remove() { 5*~G7/hT
SortUtil.swap(queue,1,size--); ,%Dn}mWu
fixDown(1); +Ge-!&.;A
} j134iVF%
file://fixdown Z:5e:M
private void fixDown(int k) { D;m>9{=
int j; |o6B:NH,rg
while ((j = k << 1) <= size) { 58WL8xu
if (j < size %26amp;%26amp; queue[j] j++; ?&"-y)FG
if (queue[k]>queue[j]) file://不用交换 q*52|?
break; @<;0h|
SortUtil.swap(queue,j,k); O9jqeF`L=
k = j; 4R.rSsAH
} RH~KaV3
} 10t9Qv/
private void fixUp(int k) { /JJU-A(
while (k > 1) { 3s"x{mtH
int j = k >> 1; A=Dzd/CUO
if (queue[j]>queue[k]) HPT$)NeNc
break; GXf"a3
SortUtil.swap(queue,j,k); ?9.SwIxU&
k = j; KxqJlben
} 8eQ 4[wJY
} jo/-'Lf{?
p"3_u;cN
} ~^ Q`dJL
!5&% P b
} hjs[$,1
n YWS'i@
SortUtil： ]|'Mf;
r+ k5Bk'
package org.rut.util.algorithm; i#=s_v8
O6 bB CF;
import org.rut.util.algorithm.support.BubbleSort; %,1bh
import org.rut.util.algorithm.support.HeapSort; =UT*1-yhR
import org.rut.util.algorithm.support.ImprovedMergeSort; d%8hWlffz
import org.rut.util.algorithm.support.ImprovedQuickSort; xXQDHc-Ba
import org.rut.util.algorithm.support.InsertSort; )BmK'H+l
import org.rut.util.algorithm.support.MergeSort; +<7`Gn(n3
import org.rut.util.algorithm.support.QuickSort; |]*]k`o<)
import org.rut.util.algorithm.support.SelectionSort; v?vm-e
import org.rut.util.algorithm.support.ShellSort; XhhV7J_F
oYI7 .w
/** )w=ehjV^m
* @author treeroot @WEDXB
* @since 2006-2-2 Y?ouB
* @version 1.0 ?%d]iTZE
*/ :>+}|(v
public class SortUtil { OLg=kF[[
public final static int INSERT = 1; @FU9!
public final static int BUBBLE = 2; ha&2V=
public final static int SELECTION = 3; ~QQi{92
public final static int SHELL = 4; /p}^Tpu
public final static int QUICK = 5; kzcl
public final static int IMPROVED_QUICK = 6; Myvp PW
public final static int MERGE = 7; U8m/L^zh
public final static int IMPROVED_MERGE = 8; W^v3pH-y#
public final static int HEAP = 9; \("|X>00
C5"=%v[gQv
public static void sort(int[] data) { R9xhO!
sort(data, IMPROVED_QUICK); #0GvL=}k
} g 67;O(3
private static String[] name={ ~|QhWgq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Wo+fMn(O
}; ER-X1fD
Rw-!P>S$
private static Sort[] impl=new Sort[]{ xy;u"JY*
new InsertSort(), 'So,*>]63
new BubbleSort(), }]VFLBl`w
new SelectionSort(), FX}kH]
new ShellSort(), V $Y=JK@
new QuickSort(), rlV:% k
new ImprovedQuickSort(), rY yB"|
new MergeSort(), Vz[tgb]-
new ImprovedMergeSort(), X+dLk(jI`u
new HeapSort() 1g<jr.
}; -!4Mmp"2@u
1<766
public static String toString(int algorithm){ h0ml#A`h
return name[algorithm-1]; U|yXJ.Z3
} vM5yiHI(jb
+J[<zxh\
public static void sort(int[] data, int algorithm) { _[IOPHa"
impl[algorithm-1].sort(data); M5\$+Tu
} 'ONCz
p`N+9t&I4
public static interface Sort { fXD9w1
public void sort(int[] data); >JVdL\3
} ~$w9L998+
zp.-=)D4e
public static void swap(int[] data, int i, int j) { tr?U/YG
int temp = data; e,V @t%
data = data[j]; ;xqN#mqq
data[j] = temp; N5K\h}'%
} lFJDdf2:$C
} 'ip2|UG