[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; <Ny DrO"C3
} +:IwP
int i1=l; #Nv^F
int i2=mid+1; kFRl+,bi~
for(int cur=l;cur<=r;cur++){ gwA+%]
if(i1==mid+1) N$!aP/b
data[cur]=temp[i2++]; }Wk^7[Y
else if(i2>r) qG6?k}\\
data[cur]=temp[i1++]; TR<M3,RG#%
else if(temp[i1] data[cur]=temp[i1++]; G!u+~{g
else {Vw\#/,
data[cur]=temp[i2++]; 6>yfm4o
} >U~{WM$"Y
} azs lNL
gNWTzz<[f>
} [%0{7pz}
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改进后的归并排序: g3Xab
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package org.rut.util.algorithm.support; #`HY"-7m_
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import org.rut.util.algorithm.SortUtil; 8opd0'SNaB
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/** o]@Mg5(8Q
* @author treeroot Q)IL]S
* @since 2006-2-2 I[l8@!0
* @version 1.0 CE|iu!-4
*/ aPwUC:>`D
public class ImprovedMergeSort implements SortUtil.Sort { t'e\Z2
[ ,&O
private static final int THRESHOLD = 10; Irc(5rD7
fi,h`mdT?
/* 8v ZY+Q >
* (non-Javadoc) ; u@& [
* >p`ZcFNs"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vG{lxPIj
*/ d:L|BkQ7*
public void sort(int[] data) { 6CV9ewr
int[] temp=new int[data.length]; R1/h<I:
mergeSort(data,temp,0,data.length-1); $(r/N"6)O2
} tKX+eA]
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private void mergeSort(int[] data, int[] temp, int l, int r) { 6IPQ}/l
int i, j, k; (a9>gLI0
int mid = (l + r) / 2; -cONC9=
if (l == r) BN~gk~t_
return; n/6qc3\5i
if ((mid - l) >= THRESHOLD) |>~pA}
mergeSort(data, temp, l, mid); }0oVIr
else [S_qi,
insertSort(data, l, mid - l + 1); iD${7 _
if ((r - mid) > THRESHOLD) X{u\|e{
mergeSort(data, temp, mid + 1, r); !qe:M]C'l
else V{{Xz:
insertSort(data, mid + 1, r - mid); Bnfp_SM
_)U.5f<
for (i = l; i <= mid; i++) { $`&zIz
temp = data; y2o~~te
} A-&XgOL
for (j = 1; j <= r - mid; j++) { ^2a63_
temp[r - j + 1] = data[j + mid]; 2X,`t%o
} KNG7$icG
int a = temp[l]; NVX@1}
int b = temp[r]; 61~7 L^882
for (i = l, j = r, k = l; k <= r; k++) { Fd;%wWY.zm
if (a < b) { ]ft}fU5C1
data[k] = temp[i++]; _*.ImD
a = temp; YHOo6syk
} else { M~ku4ZP
data[k] = temp[j--]; NiSH$MJ_
b = temp[j]; [vTk*#Cl4
} ~wFiq)v(
} 7t3ps
} asZ(Hz%
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/** 4de:hE
* @param data !Z!X]F-fY
* @param l j[${h,p?
* @param i KQTv5|$?
*/ $1uT`>%
private void insertSort(int[] data, int start, int len) { U}R(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V0G"Z6
} ( u^`3=%n
} P[%nD cB
} REGk2t.L
} LEC=@) B
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堆排序： '\% Kd+k
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package org.rut.util.algorithm.support; P47x-;
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import org.rut.util.algorithm.SortUtil; Q#5~"C
;J,`v5z0:
/** #SX-Y)> 1@
* @author treeroot ez14f$cJ+
* @since 2006-2-2 mMw--Gc?
* @version 1.0 ECk* H
*/ #Dp]S,e
public class HeapSort implements SortUtil.Sort{ K"jS,a?s 6
P$zhMnAAN
/* (non-Javadoc) hf\/2Vl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LUzn7FZk
*/ 2GxkOch
public void sort(int[] data) { Z 5 Xis"j
MaxHeap h=new MaxHeap(); d:#z{V_
h.init(data); uH |:gF^
for(int i=0;i h.remove(); P?hB`5X
System.arraycopy(h.queue,1,data,0,data.length); +-:o+S`q~
} QTospHf`
!LJ4 S
private static class MaxHeap{ -sxu7I
^Rb*mI
void init(int[] data){ >0JCu^9
this.queue=new int[data.length+1]; ;R]~9Aan
for(int i=0;i queue[++size]=data; X@ S~D7|ja
fixUp(size); q.bxnta"
} $kBcnk
} <~zPt&C]V
:n,x?bM
private int size=0; ?|Ey WAL
UaB2vuL*=
private int[] queue; j@R"AP}
* .g[vCy
public int get() { CrB4%W:{
return queue[1]; g&rz*)|/
} TPn#cIPG
PsM8J
public void remove() { 3qkPe_<I
SortUtil.swap(queue,1,size--); 9v/=o`J#
fixDown(1); |RL\2j|
} ,WBKN)%u
file://fixdown E:y^= Y
private void fixDown(int k) { n.XgGT=L
int j; ,uPN\`.u8
while ((j = k << 1) <= size) { >P ~j@Lv
if (j < size %26amp;%26amp; queue[j] j++; q[(1zG%NbA
if (queue[k]>queue[j]) file://不用交换 05Q4$P
break; biPj(Dd
SortUtil.swap(queue,j,k); +DaKP)H\:
k = j; {f\{{JJ]
} %c@PTpAM
} bwI"V&*
private void fixUp(int k) { +ryB*nT
while (k > 1) { ^% L;FGaA
int j = k >> 1; hi/Z>1ZOX
if (queue[j]>queue[k]) (aLjW=
break; n&2OfBJ
SortUtil.swap(queue,j,k); W5/|.}
k = j; sB5@6[VDI
} F!g;}_s9
} P$.$M}rMv
&crR nv?
} K >Q6
m'-QVZ{(M%
} qERJEyU?
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SortUtil： 49ehj1Se
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package org.rut.util.algorithm; cRE6/qrXGg
kGAB'
import org.rut.util.algorithm.support.BubbleSort; mqbCa6>_S
import org.rut.util.algorithm.support.HeapSort; |I;]fH,+
import org.rut.util.algorithm.support.ImprovedMergeSort; ^kke
import org.rut.util.algorithm.support.ImprovedQuickSort; KA>QW[HX
import org.rut.util.algorithm.support.InsertSort; &eb8k2S
import org.rut.util.algorithm.support.MergeSort; s>)?MB*vb
import org.rut.util.algorithm.support.QuickSort; h; 6G~D
import org.rut.util.algorithm.support.SelectionSort; `I8ep=VZ
import org.rut.util.algorithm.support.ShellSort; vSR5F9
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/** mWUd-|Ul
* @author treeroot h]vEXWpG]
* @since 2006-2-2 :!^NjO
* @version 1.0 Wt.['`c<
*/ 97/4J
public class SortUtil { EQQ@nW{;
public final static int INSERT = 1; xd\ml 37~
public final static int BUBBLE = 2; L)qUBp@MW
public final static int SELECTION = 3; }a;H2&bu
public final static int SHELL = 4; egAYJK-,!
public final static int QUICK = 5; S f6%A
public final static int IMPROVED_QUICK = 6; z<%dWz
public final static int MERGE = 7; "ruYMSpU
public final static int IMPROVED_MERGE = 8; 3 2"f'{
public final static int HEAP = 9; T[<554
raZkH8
public static void sort(int[] data) { _5S||TuNS
sort(data, IMPROVED_QUICK); [930=rF*
} wYLodMaYH
private static String[] name={ l[u17,]S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8@b`a]lgrd
}; ]L2b|a3
ui-]%~
private static Sort[] impl=new Sort[]{ x.$cP
new InsertSort(), ttls.~DG
new BubbleSort(), wp83E,
new SelectionSort(), Bw~jqDZ}|
new ShellSort(), L9oLdWa(C
new QuickSort(), 6&QOC9JW+7
new ImprovedQuickSort(), x4h.WDT$
new MergeSort(), Gqj(2.AY
new ImprovedMergeSort(), ^j@+!A_.Q
new HeapSort() 'u%vpvF
}; W.%p{wB|
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public static String toString(int algorithm){ NwdrJw9
return name[algorithm-1]; >I-rsw2
} &3J^z7kU
{jv+ JL"5
public static void sort(int[] data, int algorithm) { x!7r7|iV
impl[algorithm-1].sort(data); fg lN_
} ox_DEg7l
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public static interface Sort { B_D0yhh
public void sort(int[] data); zeq")A
} IVy<>xpt
oW(EV4J"
public static void swap(int[] data, int i, int j) { 6=qC/1,l
int temp = data; + )z5ai0m
data = data[j]; zg'.fUZ
data[j] = temp; bxzx@sF2l
} =>kg]
} 4GH&u,