[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; J5z\e@?.0\
} @CoUFdbz
int i1=l; vZ^U]h V
int i2=mid+1; H;ujB \+
for(int cur=l;cur<=r;cur++){ j8^zE,Z
if(i1==mid+1) . K_Jg$3
data[cur]=temp[i2++]; tGSXTF}G
else if(i2>r) 9Sl5jn
data[cur]=temp[i1++]; xmfZ5nVL
else if(temp[i1] data[cur]=temp[i1++]; I$XwM
else Tl+PRR6D*
data[cur]=temp[i2++]; `P$X`;SwE
} 2+*o^`%4P
} 05 .EI)7
.z*}%,G
} 0WyOORuK
H.o3d/8:
改进后的归并排序: Ag&K@%|*
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package org.rut.util.algorithm.support; ,C:^K`k&
J*AYZS-tSE
import org.rut.util.algorithm.SortUtil; /"^XrVi-
=?N$0F!
/** 6}Rb-\N
* @author treeroot }%^3
* @since 2006-2-2 JbN,K
* @version 1.0 CioS}K
*/ \6pQ&an
public class ImprovedMergeSort implements SortUtil.Sort { ]LMtZUz
%zhSSB=BJ
private static final int THRESHOLD = 10; ih|&q
,vBB". LY'
/* &2n5m&
* (non-Javadoc) z(#dL>d$'
* :8N{;aui
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qo*OC 9E`
*/ s{42_O?,c
public void sort(int[] data) { >gl.ILo
int[] temp=new int[data.length]; =Q6JXp
mergeSort(data,temp,0,data.length-1); y I[kaH"J
} 42:,*4t(
( efxw
private void mergeSort(int[] data, int[] temp, int l, int r) { 6y"T;.FAo
int i, j, k; Z|A+\#'
int mid = (l + r) / 2; M<Y{Cs
if (l == r) LKZv#b[h
return; -$,'|\Y
if ((mid - l) >= THRESHOLD) Owv}lJ
mergeSort(data, temp, l, mid); WHu[A/##']
else _:Jma
insertSort(data, l, mid - l + 1); [fs.D /
if ((r - mid) > THRESHOLD) 8~O0P=
mergeSort(data, temp, mid + 1, r); B3I0H6O
else O5:[]vIn
insertSort(data, mid + 1, r - mid); A+z}z@K
O:8Ne*L`D
for (i = l; i <= mid; i++) { =NWzsRl,
temp = data; tJm1Q#||
} ):n'B` f}z
for (j = 1; j <= r - mid; j++) { 3-)R'
temp[r - j + 1] = data[j + mid]; gf^y3F[\
} UMHFq-
int a = temp[l]; b=SCyGxlZ5
int b = temp[r]; IBW-[lr7
for (i = l, j = r, k = l; k <= r; k++) { 6H;\Jt
if (a < b) { mApl;D X
data[k] = temp[i++]; +,)Iv_Xl$
a = temp; JZJb&q){
} else { R?Ch8mW.!
data[k] = temp[j--]; aPX'CG4m
b = temp[j]; SPauno <M
} j9BcoEl:;
} /4upw`35]
} at\$ IK_
urQ<r{$x0
/** zXkq2\GHA
* @param data &egP3
* @param l i1GQ=@
* @param i we kb&?
*/ Fz| r[
private void insertSort(int[] data, int start, int len) { 6p.y/LMO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^,J>=>,1\
} vOl3utu7
} 2Tv W 6
} //bQD>NBO
} Fw^^sB
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堆排序： Rhw+~gd*F
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package org.rut.util.algorithm.support; 6t'.4SR
6B}V{2
import org.rut.util.algorithm.SortUtil; G}aM~,v
X<f4X"y
/** Ty*+?#`
* @author treeroot v7f[$s$m
* @since 2006-2-2 hb>uHUb&
* @version 1.0 m]}EVa_I`/
*/ pezfB{x?
public class HeapSort implements SortUtil.Sort{ {J/+KK
]1I-e2Q-J
/* (non-Javadoc) OUN"'p%%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yvnvIy
*/ !P6?nS
public void sort(int[] data) { m&[(xVM
MaxHeap h=new MaxHeap(); (v$ i
h.init(data); Qz$Wp*
for(int i=0;i h.remove(); TZdJq
System.arraycopy(h.queue,1,data,0,data.length); \7e4t
} KYq<n& s
0;%\L:,O
private static class MaxHeap{ ; NO#/
H)rJ>L
void init(int[] data){ :]LW,Eql
this.queue=new int[data.length+1]; HaF&ooI5+
for(int i=0;i queue[++size]=data; !lp7}[k<y
fixUp(size); q35=_'\W
} Vq^b_^
} yP34h*0B
v7@*dg
private int size=0; ciW;sK8
r>rL[`p(2
private int[] queue; <t"fL RX
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public int get() { @scSW5+
return queue[1]; ?gjkgCbC#
} >VG*La'c
W~s:SN
public void remove() { dE3M
SortUtil.swap(queue,1,size--); y4H/CH$%
fixDown(1); upq3)t_
} 8rNf4]5@X(
file://fixdown -.Zy(
private void fixDown(int k) { y-Lm^GW4
int j; J?jxD/9Yb
while ((j = k << 1) <= size) { Iomx"y]9
if (j < size %26amp;%26amp; queue[j] j++; oMNBK/X_
if (queue[k]>queue[j]) file://不用交换 F'ez{B\AX
break; gUiZv8C
SortUtil.swap(queue,j,k); +hs:W'`%
k = j; +KIBbXF7
} _9S"rH[
} -@~4:o
private void fixUp(int k) { *]DO3Zw'
while (k > 1) { iZ(JwY
int j = k >> 1; n+s=u$%qn
if (queue[j]>queue[k]) f^Q)lIv
break; VI.Cmw~S
SortUtil.swap(queue,j,k); "DRiJ.|APs
k = j; B.);Ju
} -y/Y%]%0
} T6\d]
w~n+hhMF
} p#>,{
yXf+dMv
} j3[kG#
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SortUtil： Q=epUHFs
dSS Ai |}
package org.rut.util.algorithm; ixqvX4vv,B
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import org.rut.util.algorithm.support.BubbleSort; a24(9(yh
import org.rut.util.algorithm.support.HeapSort; v}@Uc-(
import org.rut.util.algorithm.support.ImprovedMergeSort; HYNpvK
import org.rut.util.algorithm.support.ImprovedQuickSort; qI[AsM+
import org.rut.util.algorithm.support.InsertSort; ^vI`#}?
import org.rut.util.algorithm.support.MergeSort; w=~X6[+3
import org.rut.util.algorithm.support.QuickSort; /5Yl, P
import org.rut.util.algorithm.support.SelectionSort; #zc$cr
import org.rut.util.algorithm.support.ShellSort; ]hbrzvo
w(Q{;RNM;
/** p`'3Il3
* @author treeroot SOS|3q_`
* @since 2006-2-2 r4]hcoU
* @version 1.0 /5?tXH"
*/ `b_n\pf]
public class SortUtil { R-Y 7I
public final static int INSERT = 1; V7k!;0u v
public final static int BUBBLE = 2; HUel
public final static int SELECTION = 3; Q@Cy\l
public final static int SHELL = 4; d[p?B-7%
public final static int QUICK = 5; I"D}amuv
public final static int IMPROVED_QUICK = 6; ;20sh^~
public final static int MERGE = 7; JRDIGS_~
public final static int IMPROVED_MERGE = 8; c7R6.T
public final static int HEAP = 9; !]&+g'aC3
LXRIo2ynuw
public static void sort(int[] data) { o3le[6C/8=
sort(data, IMPROVED_QUICK); A=np?wc
} 6L-3cxqf\
private static String[] name={ 4u1au1c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YIHGXi<"n
}; bq{eu#rQJ
I0_>ryA
private static Sort[] impl=new Sort[]{ Qn@[{%),4
new InsertSort(), Yr>7c1FZi
new BubbleSort(), WH.3
new SelectionSort(), MO|8A18B
new ShellSort(), )ZfbM|
new QuickSort(), l^__oam
new ImprovedQuickSort(), &E-q(3-
new MergeSort(), ^,Ft7JAn
new ImprovedMergeSort(), :7s2M
new HeapSort() 2hb>6Z;r]K
}; D#d/?\2
)c.!3n/pb
public static String toString(int algorithm){ 2UTmQOm
return name[algorithm-1]; -LlS9[r0
} k jx<;##R8
:79u2wSh
public static void sort(int[] data, int algorithm) { ]'0}fuV
impl[algorithm-1].sort(data); <Q_E3lQy/
} 48.4GwL7
1CS\1[E
public static interface Sort { N \woFrG
public void sort(int[] data); I@(3~ Ab
} *~zB{
$/Llzpvny
public static void swap(int[] data, int i, int j) { w[u>*I
int temp = data; 0 .ck!"h}
data = data[j]; \ns} M3
data[j] = temp; _*wlK;`
} )J 8mn*
} 4?c0rC<