[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; `>`K7-H
} .236d^l
int i1=l; 4'}_qAT
int i2=mid+1; v$.JmL0^J
for(int cur=l;cur<=r;cur++){ "lv:hz
if(i1==mid+1) 1OiZNuI:E
data[cur]=temp[i2++]; j{7ilo(i
else if(i2>r) )CwMR'LV
data[cur]=temp[i1++]; r2E>sHw
else if(temp[i1] data[cur]=temp[i1++]; Up/eV}C
else :o.x=c B
data[cur]=temp[i2++]; ReHd~G9
} \V"PmaP\
} 07T;IV3#C5
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} 9d,]_l.sB
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改进后的归并排序: QigoRB!z#9
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package org.rut.util.algorithm.support; Y1Gg (z
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import org.rut.util.algorithm.SortUtil; <u x*r#a!d
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/** ,#'o)O#
* @author treeroot xnhDW7m
* @since 2006-2-2 }(g+:]p-
* @version 1.0 i)ES;b4
*/ HYI1 o/}
public class ImprovedMergeSort implements SortUtil.Sort { 764}yV>
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private static final int THRESHOLD = 10; Il&"=LooZ
5uD#=/oV
/* jnU*l\,
* (non-Javadoc) jOm&yX
* mP5d!+[8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r0?hX
*/ p~d)2TC4#
public void sort(int[] data) { }VGI Y>v
int[] temp=new int[data.length]; '^-4{Y^2E
mergeSort(data,temp,0,data.length-1); RBK>Lws6
} 3"^)bGe
jy__Y=1}
private void mergeSort(int[] data, int[] temp, int l, int r) { Gwrx)Mq
int i, j, k; +,F= -
int mid = (l + r) / 2; ax{-Qi7z-+
if (l == r) lU50.7<08
return; f@;>M9)<
if ((mid - l) >= THRESHOLD) zZ+LisSs&
mergeSort(data, temp, l, mid); }eDX8b8emA
else \HP,LH[P:
insertSort(data, l, mid - l + 1); xXY)KI N[
if ((r - mid) > THRESHOLD) 8@LykJbP
mergeSort(data, temp, mid + 1, r); 0LHiOav
else RESGI}u
insertSort(data, mid + 1, r - mid); "13 :VTs[5
Lm*LJ_+ B
for (i = l; i <= mid; i++) { 53u.pc
temp = data; kq1M<lk
} &6|^~(P?
for (j = 1; j <= r - mid; j++) { {HRxyAI!
temp[r - j + 1] = data[j + mid]; A^r [_dyZ
} /nMqEHCyg
int a = temp[l]; Vm1c-,)3
int b = temp[r]; )ejXeg
for (i = l, j = r, k = l; k <= r; k++) { &PQ{e8w
if (a < b) { |H+k?C-w
data[k] = temp[i++]; 3]kAb`9[K2
a = temp; 0JZq:hUd
} else { W-]yKSob
data[k] = temp[j--]; |E_+*1lq.
b = temp[j]; Dpp52UnTE
} Ng;b!S
} ;cm{4%=Iqe
} p3A-WK|NX
AZ]SRz9mKY
/** ]-s`#
* @param data _9O }d
* @param l i2ml[;*,N
* @param i #;*ai\6>vD
*/ A^Hp#b@
private void insertSort(int[] data, int start, int len) { 9 K /
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %wjU^Urya
} TNPGw!
} A$"$`)P!
} #u=O 5%.
} M4hN#0("4
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堆排序： o2e h)rtB
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package org.rut.util.algorithm.support; ;,B@84'
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import org.rut.util.algorithm.SortUtil; piiQ
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/** ?xTeio44
* @author treeroot >'1Q"$;
* @since 2006-2-2 CL}I:/zRB
* @version 1.0 bQN4ozSi
*/ by y1MgQd
public class HeapSort implements SortUtil.Sort{ sImxa`kb
J0WXH/:
/* (non-Javadoc) K?OX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zn 5m.=z
*/ mlw BATi
public void sort(int[] data) { <ZvPtW
MaxHeap h=new MaxHeap(); vLT12v:)`
h.init(data); fm:{&(
for(int i=0;i h.remove(); zUgkY`]:BJ
System.arraycopy(h.queue,1,data,0,data.length); G-i_s6Wu
} nu9k{owB T
e4W];7_K!
private static class MaxHeap{ 4!s k3Cw{
e"H+sM26-
void init(int[] data){ {)[g
this.queue=new int[data.length+1]; |b;M5w?
for(int i=0;i queue[++size]=data; 6C51:XQO
fixUp(size); oD}FJvV
} dSOn\+
} S+xGHi)
? A#z~;X@
private int size=0; :pjK\
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private int[] queue; 4aGpKvW
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public int get() { `M<G8ob
return queue[1]; yhn $4;m
} *U^I`j[u
BH*]OXW\
public void remove() { v%7JZ<I'A
SortUtil.swap(queue,1,size--); IguG03:.N
fixDown(1); @dKf]&h%%
} }N9a!,{P=b
file://fixdown ]~M{@h!<
private void fixDown(int k) { ziGL4c0p
int j; l45F*v]^
while ((j = k << 1) <= size) { i&Cqw~.H
if (j < size %26amp;%26amp; queue[j] j++; jW$f(qAbm
if (queue[k]>queue[j]) file://不用交换 hgr ,v"
break; qhf/B)
SortUtil.swap(queue,j,k); <0qY8
k = j; KQZRzX>0
} (V?`W7
} ]"vdC}
private void fixUp(int k) { so&3A&4cL
while (k > 1) { ';!UJWYl
int j = k >> 1; e14Q\
if (queue[j]>queue[k]) 'u%;6'y
break; ^O:RS g9
SortUtil.swap(queue,j,k); "MP{z~Mmj
k = j; tl^;iE!-
} Y k6WSurw
} FsZEB/c
by ee-BU
} udr'~,R
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} > _) a7%
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SortUtil： 7cSvAX0Z.
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package org.rut.util.algorithm; 1x8]&
F<1'M#bl
import org.rut.util.algorithm.support.BubbleSort; 7P(:!ce4-
import org.rut.util.algorithm.support.HeapSort; yrb%g~ELGn
import org.rut.util.algorithm.support.ImprovedMergeSort; }Q*ec/^{f
import org.rut.util.algorithm.support.ImprovedQuickSort; r8E!-r}rno
import org.rut.util.algorithm.support.InsertSort; DvKMb-*S
import org.rut.util.algorithm.support.MergeSort; eVJL|uI|
import org.rut.util.algorithm.support.QuickSort; RR9s%>^
import org.rut.util.algorithm.support.SelectionSort; Va:jMN
import org.rut.util.algorithm.support.ShellSort; <7h'MNf&
#-8/|_*
/** HxAa,+k
* @author treeroot Oms`i&}"}
* @since 2006-2-2 ]z$<6+G
* @version 1.0 4cL=f
*/ 8Aqe'2IH=
public class SortUtil { ~Y$1OA8
public final static int INSERT = 1; 5 [*jfOz
public final static int BUBBLE = 2; gnec#j
public final static int SELECTION = 3; n$K_KU v
public final static int SHELL = 4; =^{+h>#s@
public final static int QUICK = 5; 0J B"@U&-
public final static int IMPROVED_QUICK = 6; fz\Az-
public final static int MERGE = 7; epePx0N%x$
public final static int IMPROVED_MERGE = 8; 36z{TWF
public final static int HEAP = 9; Sx7xb]3XI"
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public static void sort(int[] data) { MDZb|1.AT
sort(data, IMPROVED_QUICK); ny0`~bl{p
} SX.v5plhc
private static String[] name={ ^YV[1~O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g>{=R|uO5
}; 2oRmro
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private static Sort[] impl=new Sort[]{ *HUqW}_r
new InsertSort(), Uk#1PcPd
new BubbleSort(), dcsd//E
new SelectionSort(), 01b0;|
new ShellSort(), O@VmV>m
new QuickSort(), ;F-kE4w
new ImprovedQuickSort(), n%}0hVu
new MergeSort(), e~1??k.;=
new ImprovedMergeSort(), `CBTZG09
new HeapSort() /$KW$NH4z
}; d4U_Wu&
Tu"](|I>
public static String toString(int algorithm){ :\Dm=Q\
return name[algorithm-1]; sj1x>
} 8w4.|h5FP
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public static void sort(int[] data, int algorithm) { QGa"HG5NF
impl[algorithm-1].sort(data); -3C~}~$>`
} . Hw^Nx
-Cl0!}P4I
public static interface Sort { E;SFf
public void sort(int[] data); ;C3](
} mi+I)b=
sSxra!tv4
public static void swap(int[] data, int i, int j) { b@k3y9&
int temp = data; 3i<*,@CY
data = data[j]; *Zln\Sx
data[j] = temp; b^1!_1c
} 6mZFsB
} .nnAI@7E