[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; xHs8']*\
} Z)RoFD1]C
int i1=l; 4wLp
int i2=mid+1; 5v51:g>c
for(int cur=l;cur<=r;cur++){ ![ & go
if(i1==mid+1) bERYC|
data[cur]=temp[i2++]; $S~e"ca1
else if(i2>r) jD@KG
data[cur]=temp[i1++]; 2rS|V|d
else if(temp[i1] data[cur]=temp[i1++]; |Qq_;x]
else obUX7N
data[cur]=temp[i2++]; B^W0Ik`m
} yqdhLX|Mk
} Jh3(5d"MV
o$k1&hyH
} IuJj;L1
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改进后的归并排序: Vz$X0C=W;H
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package org.rut.util.algorithm.support; 2Z3c`/k
_7?LINF9
import org.rut.util.algorithm.SortUtil; /UGH7srx
Pb05>J3N
/** fD8A+aA
* @author treeroot `mU'{
* @since 2006-2-2 #!,tId
* @version 1.0 * A B
*/ J%ym1A9
public class ImprovedMergeSort implements SortUtil.Sort { uj@rv&
W~ 6ii\
private static final int THRESHOLD = 10; 1b)^5U ;
:OC`X~}Rc
/* '%&i#Eb
* (non-Javadoc) q4)8]Y2
* V#!ftu#c?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L_Q1:nL-0
*/ 'Wv=mBEfZ
public void sort(int[] data) { Do3;-yp>`
int[] temp=new int[data.length]; -\mbrbG9H
mergeSort(data,temp,0,data.length-1); 3c<).aC0f
} Y|bCbaF
:-xF=Y(;
private void mergeSort(int[] data, int[] temp, int l, int r) { KNtsz[#b
int i, j, k; |2,'QTm=
int mid = (l + r) / 2; vas
if (l == r) Xj:?V;
return; ]d]tQPEU
if ((mid - l) >= THRESHOLD) D'y/pv}!
mergeSort(data, temp, l, mid); 4zyy
else $xT'cl/IH
insertSort(data, l, mid - l + 1); ?(Dk{-:T'
if ((r - mid) > THRESHOLD) RC5b'+E&#
mergeSort(data, temp, mid + 1, r); (;^VdiJ
else )M5:aSRz
insertSort(data, mid + 1, r - mid); kFPZ$8e
Xrpzc~(
for (i = l; i <= mid; i++) { +R}(t{b#
temp = data; > <WR]`G
} g0@i[&A@{
for (j = 1; j <= r - mid; j++) { Q>y2C8rnJ/
temp[r - j + 1] = data[j + mid]; 9;3f`DK@2k
} [([?+Ouy
int a = temp[l]; y>zPsc,
int b = temp[r]; mZ9+.lm
for (i = l, j = r, k = l; k <= r; k++) { %;0Llxf"
if (a < b) { /JPyADi
data[k] = temp[i++]; g`)2I+L7
a = temp; 0w?\KHT
} else { 't3/< h<
data[k] = temp[j--]; -P+( =U
b = temp[j]; YnZV.&4{
} !@E=\Sm8EV
} RH+3x7l
} 7o?6Pv%HJC
fDo )~t*~
/** Bor_Kib
* @param data ;hsgi|Cy-
* @param l MrIo.
* @param i |1`|E-S=
*/ o ~"?K2@T
private void insertSort(int[] data, int start, int len) { 8E`rs)A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .%>UA|[~:
} "i$Avm
} j>s>i
} X^4HYm
} M|e Qds
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堆排序： A-:58Qau+
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package org.rut.util.algorithm.support; $Oa}U3
k?|l;6
import org.rut.util.algorithm.SortUtil; ;c"T#CH.
eaQ)r?M
/** Y2i:ZP
* @author treeroot o@[yF<
* @since 2006-2-2 ;j]0GD,c$
* @version 1.0 F$Q(2:w
*/ F)4Y;;#
public class HeapSort implements SortUtil.Sort{ 3P C'P2
H:x=v4NgsU
/* (non-Javadoc) b!VaEK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9j458Yd4*
*/ tiJY$YqA
public void sort(int[] data) { >jU.R;H5
MaxHeap h=new MaxHeap(); l;$HGoJ
h.init(data); +5(#~
for(int i=0;i h.remove(); B5"(NJ;
System.arraycopy(h.queue,1,data,0,data.length); ^]}UyrOn
} fw@n[u{~
'6*^s&H~
private static class MaxHeap{ H8j#rC#&pm
!gv/jdF
void init(int[] data){ #)`N
this.queue=new int[data.length+1]; D2x-Wa
for(int i=0;i queue[++size]=data; >x0"gh
fixUp(size); 1au1DvH
} "\bbe@
} *"#62U6
FCxLL"))
private int size=0; 9:N@+;|T
HgJ:Rf]
private int[] queue; +VSJve |
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public int get() { zg,?aAm
return queue[1]; Rk8>Ak(/
} a[iuE`
ur^)bp<n
public void remove() { 8/X#thG
SortUtil.swap(queue,1,size--); w=>~pYASH
fixDown(1); T-pes1Wu
} v5U\E`)s
file://fixdown 5tI4m#y2
private void fixDown(int k) { B:dk>$>uQ
int j; ! 9B| `
while ((j = k << 1) <= size) { D. !m*oq
if (j < size %26amp;%26amp; queue[j] j++; ehQ"<.sQ
if (queue[k]>queue[j]) file://不用交换 /*J}7
break; isK~=
SortUtil.swap(queue,j,k); C=L_@{^Rgb
k = j; =E@wi?
} t_1a.Jv
} k@nx+fO}P
private void fixUp(int k) { <H3njv
while (k > 1) { =pQA!u]QE
int j = k >> 1; *x3";%o
if (queue[j]>queue[k]) 42mi 7%f
break; 8:hUj>qx
SortUtil.swap(queue,j,k); \},="
k = j; WvVHSa4{
} .RocENO0
} N8.K[m
dOPA0Ja
} WoGK05w
p#HbN#^Hy
} "/6<k0.D&
z,/0e@B >
SortUtil： 9{bG @g
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package org.rut.util.algorithm; gzDH~'8W
hXr`S4aJ
import org.rut.util.algorithm.support.BubbleSort; e6n1/TtqM
import org.rut.util.algorithm.support.HeapSort; 2*:lFvwP
import org.rut.util.algorithm.support.ImprovedMergeSort; 1jU<]09.
import org.rut.util.algorithm.support.ImprovedQuickSort; *gRg--PY%
import org.rut.util.algorithm.support.InsertSort; 2Eg*Yb 1
import org.rut.util.algorithm.support.MergeSort; ;4<CnC**
import org.rut.util.algorithm.support.QuickSort; nHxos`Qx
import org.rut.util.algorithm.support.SelectionSort; Ek\fx*Lz
import org.rut.util.algorithm.support.ShellSort; c]:sk[u
EacqQFErl
/** '^pA%I2D
* @author treeroot |}zvCD
* @since 2006-2-2 OU+oS,
* @version 1.0 m[S6pqz
*/ -'&4No
public class SortUtil { u=B_cA}:
public final static int INSERT = 1; QF:">G
public final static int BUBBLE = 2; H'68K8i0
public final static int SELECTION = 3; p] kpDx[9
public final static int SHELL = 4; x 8lgDO
public final static int QUICK = 5; ZzfGs
public final static int IMPROVED_QUICK = 6; |0nbO2}
public final static int MERGE = 7; .])ubK_9
public final static int IMPROVED_MERGE = 8; gIrVrAV#
public final static int HEAP = 9; 1Y iUf
NQS@i'W=g
public static void sort(int[] data) { 7MIu-x|
sort(data, IMPROVED_QUICK); !%b.k6%>w
} Yjxa=CD
private static String[] name={ R~u0!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DArEIt6Q
}; G4g<PFx
jSbO1go#
private static Sort[] impl=new Sort[]{ is&A_C7yg
new InsertSort(), s6<`#KFAg
new BubbleSort(), Gs$<r~Tg
new SelectionSort(), mlCw(i,
new ShellSort(), 5P_%Vp`B2
new QuickSort(), O[[:3!6q
new ImprovedQuickSort(), h_6QVab@
new MergeSort(), #iD5& klo\
new ImprovedMergeSort(), UKyOkuY:w
new HeapSort() rQT@:$)
}; Hb5^+.xur
V#jFjObTN
public static String toString(int algorithm){ {'dpRq{c|
return name[algorithm-1]; |aef$f5
} hPtSY'_@_
3c] oU1GfF
public static void sort(int[] data, int algorithm) { .zr2!}lB
impl[algorithm-1].sort(data); \wRbhN
} CU)'x E
! 7,rz1s73
public static interface Sort { Th,15H DA
public void sort(int[] data); v P8.{$
} e|Iylv[3
pUby0)}t
public static void swap(int[] data, int i, int j) { hKv3;jcd
int temp = data; UlQZw*ce
data = data[j]; ]$/TsN
data[j] = temp; qH'T~#S
} [B3qZ"
} m}w~ d /