[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; U[W &D%'
} dK>sHUu
int i1=l; v:]z-zU
int i2=mid+1; S9dXkd
for(int cur=l;cur<=r;cur++){ KRb'kW
if(i1==mid+1) q@vqhE4
data[cur]=temp[i2++]; jR>`Xz
else if(i2>r) #M@~8dAH}M
data[cur]=temp[i1++]; 5Kw?#
else if(temp[i1] data[cur]=temp[i1++]; i7%`}t
else B0D
data[cur]=temp[i2++]; jGe%'AN\
} ]D[\l$(
} T}59m;I
"w3%BbIx
} ]EqwDw4
r0*Y~ KHw
改进后的归并排序: ;2[),k
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package org.rut.util.algorithm.support; 6o4Y]C2W{1
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import org.rut.util.algorithm.SortUtil; DGNn#DP
P=R-1V
/** zJov*^T-C
* @author treeroot yX/{eX5dr
* @since 2006-2-2 $N\k*=
* @version 1.0 8&yI1XM|
*/ UT0}Ce>e
public class ImprovedMergeSort implements SortUtil.Sort { GI6]Ecc
B[9y<FB+
private static final int THRESHOLD = 10; 5&qBG@Hw]
KkCsQ~po
/* ehTv@2b
* (non-Javadoc) D!&]jkUN
* F ESl#.}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uo;a$sR
*/ DMlr%)@{
public void sort(int[] data) { Vllxv6/_
int[] temp=new int[data.length]; Zxh<pd25Y
mergeSort(data,temp,0,data.length-1); %F\.1\&eE
} 7[I +1
JJ9R, 8n6
private void mergeSort(int[] data, int[] temp, int l, int r) { opTH6a
int i, j, k; WjOP2CVv|
int mid = (l + r) / 2; $$i Gs6az
if (l == r) #n]K$k>
return; oxL)Jx\c9A
if ((mid - l) >= THRESHOLD) [}yPy))A
mergeSort(data, temp, l, mid); c#TV2@
else U9jdb9 |
insertSort(data, l, mid - l + 1); {.ypZ8JU
if ((r - mid) > THRESHOLD) (__$YQ-
mergeSort(data, temp, mid + 1, r); {vdY(
else \&47u1B
insertSort(data, mid + 1, r - mid); WtO@Kf:3GH
d:"7Tw2v+
for (i = l; i <= mid; i++) { yhrjML2K
temp = data; HuR774f[
} M4(57b[`
for (j = 1; j <= r - mid; j++) { (I/iD.A
temp[r - j + 1] = data[j + mid]; ]-_ ma
} "z*.Bk
int a = temp[l]; ?TJ4L/"(k6
int b = temp[r]; sDAP'&
for (i = l, j = r, k = l; k <= r; k++) { E1SWZ&';
if (a < b) { *W;;L_V"
data[k] = temp[i++]; &j,#5f(
a = temp; cg_ " }]Y1
} else { d"L(eI}G
data[k] = temp[j--]; Kg`P@
b = temp[j]; X,bhX/h
} Lp/'-Y_
} !{fu(E
} c\/-*OYr<
AN3oh1xe:
/** z?pi/`y8>
* @param data 8 Vf#t!t
* @param l i[I&m]N
* @param i %a FZbLK
*/ P^!g0K
private void insertSort(int[] data, int start, int len) { JI cm$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Jg)( F|>o
} $@O?
} eK5~YM:o
} ug.|ag'R
} |P`b"x
^VW]Qr!
堆排序： Bh'!aipk
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package org.rut.util.algorithm.support; vxOnv8(
9yaTDxB>
import org.rut.util.algorithm.SortUtil; J%n#uUs
]#W7-Q;]
/** $2+s3)
* @author treeroot fDqDU
* @since 2006-2-2 HEAW](s
* @version 1.0 %8wBZ~1-
*/ $-u c#57
public class HeapSort implements SortUtil.Sort{ :,M+njcFc
w,up`W7,
/* (non-Javadoc) (P;TM1k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K^o{lyK;@~
*/ (EvYrm4
public void sort(int[] data) { bI|{TKKN&P
MaxHeap h=new MaxHeap(); *JfGGI_E
h.init(data); L>mM6$l
for(int i=0;i h.remove(); v9FR
System.arraycopy(h.queue,1,data,0,data.length); ,]nRnI^
} ''D7Bat@
."gq[0_YS
private static class MaxHeap{ j}d):3!
mZc;n.$U
void init(int[] data){ _|W&tB*
this.queue=new int[data.length+1]; ?iV}U
for(int i=0;i queue[++size]=data; m mZP;
fixUp(size); h Ypj
} k=mLcP
} L)&^Pu
Z,/^lg c,
private int size=0; l1|*(%p?X
q'a]DJ`
private int[] queue; cMF)2^w}
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public int get() { xQU//kNL
return queue[1]; H }]Zp
} H C,5j)1
1h(IrV5g
public void remove() { oV;sd5'LG
SortUtil.swap(queue,1,size--); j`q>YPp
fixDown(1); DU8\1(
} .ahY 1CO
file://fixdown >N2kWSa
private void fixDown(int k) { ^;h\#S[%
int j; :\'1x
while ((j = k << 1) <= size) { 5z9hcQAS
if (j < size %26amp;%26amp; queue[j] j++; p`rjWpH
if (queue[k]>queue[j]) file://不用交换 U,7
break; )Ute
SortUtil.swap(queue,j,k); wr:W}Z@pL
k = j; ("ix!\1K@
} 38m9t'
} qoH:_o8ClO
private void fixUp(int k) { {5D%<Te
while (k > 1) { aMGh$\Pg
int j = k >> 1; fa,:d8
if (queue[j]>queue[k]) ,jeHL@>w[
break; SP<Sv8Okj
SortUtil.swap(queue,j,k); \m}a%/
k = j; <}A6 )=T
} N\&VJc
} v;5-1
Q]GS#n
} ks("( nU
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} =liyd74%`
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SortUtil： A^+kA)8
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package org.rut.util.algorithm; v;G/8>GRy
;<[!;8
import org.rut.util.algorithm.support.BubbleSort; /DH`7E
import org.rut.util.algorithm.support.HeapSort; &&52ji<3
import org.rut.util.algorithm.support.ImprovedMergeSort; h$$JXf
import org.rut.util.algorithm.support.ImprovedQuickSort; R[6R)#o
import org.rut.util.algorithm.support.InsertSort; 'YGP42#
import org.rut.util.algorithm.support.MergeSort; 7VZ^J`3
import org.rut.util.algorithm.support.QuickSort; Z.Z31yF:f
import org.rut.util.algorithm.support.SelectionSort; +mD;\iW]
import org.rut.util.algorithm.support.ShellSort; :|S[i('
E$4H;SN \
/** B8T5?bl
* @author treeroot EXjR&"R
* @since 2006-2-2 5wh(Qdib
* @version 1.0 yx&}bu\
*/ 87B$
public class SortUtil { .@+M6K*
public final static int INSERT = 1; `L <sZ;Cj
public final static int BUBBLE = 2; .t>SbGC
public final static int SELECTION = 3; +h/OQ]`/m
public final static int SHELL = 4; Ksh[I,+N\
public final static int QUICK = 5; tj00xYY
public final static int IMPROVED_QUICK = 6; 5uSg]2:
public final static int MERGE = 7; Gs|a$^V|o
public final static int IMPROVED_MERGE = 8; % q!i
public final static int HEAP = 9; ]e5aHpgR=
~H?v L c;>
public static void sort(int[] data) { #Pz'-lo
sort(data, IMPROVED_QUICK); CE
} muF&t'k
private static String[] name={ ow 6\j:$?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dc~vQDNw[X
}; K%BFR,)g
^/Yk*Ny
private static Sort[] impl=new Sort[]{ ^t<L
new InsertSort(), rfQs 7S;G
new BubbleSort(), Sh-B!
new SelectionSort(), Z ]ZUK
new ShellSort(), ^-s7>F`jx
new QuickSort(), AVU'rsXA
new ImprovedQuickSort(), rk&oKd_&i
new MergeSort(), pX>wMc+
new ImprovedMergeSort(), Ekrpg^3qp"
new HeapSort() W^ask[46R
}; o](ORS$~
!IC .0I`
public static String toString(int algorithm){ %jq R^F:J
return name[algorithm-1]; [a$1{[|)
} xOg|<Nnl
*kF/yN
public static void sort(int[] data, int algorithm) { i>G:*?a
impl[algorithm-1].sort(data); rk,64(
} V_v+ic^
wod{C!
public static interface Sort { ~ W8 M3(^
public void sort(int[] data); gGA5xkA
} 6rG7/
U:MZN[Cc[
public static void swap(int[] data, int i, int j) { TQ/#
int temp = data; wT;;B=u}G
data = data[j]; ]k1N-/
data[j] = temp; d3T7$'l$
} 9S'\&mRl
} #&S<{75A