[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; Sw%^&*J
} C,&r7
int i1=l; fn;`Vit#
int i2=mid+1; sBt,y_LW
for(int cur=l;cur<=r;cur++){ ~}+F$&
if(i1==mid+1) gM&XVhQJ\
data[cur]=temp[i2++]; 22(7rUkI
else if(i2>r) =HH}E/9z
data[cur]=temp[i1++]; ch!/k
else if(temp[i1] data[cur]=temp[i1++]; YH@p\#Y
else <BEM`2B
data[cur]=temp[i2++]; s$s~p +U
} ,'Zs")Ydp
} V\vt!wBcB
lXjhT
} 0M-=3T
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改进后的归并排序: ,Y ./9F
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package org.rut.util.algorithm.support; \2#7B8
RR |Z,
import org.rut.util.algorithm.SortUtil; M8(N9)N
[`2V!rU
/** hR(\%p
* @author treeroot =*>ri
* @since 2006-2-2 )G a5c
* @version 1.0 gwO]U=Y
*/ +~Wg@
public class ImprovedMergeSort implements SortUtil.Sort { clyZD`*
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private static final int THRESHOLD = 10; ;auT!a~a#
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/* crTRfqF
* (non-Javadoc) }xJ ).D
* )&Af[mS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =jz [}5
*/ )jm!bR`
public void sort(int[] data) { yGj'0c::
int[] temp=new int[data.length]; b v5BV
mergeSort(data,temp,0,data.length-1); @|N{EI
} 2Kwr=t
*QH~z2:[
private void mergeSort(int[] data, int[] temp, int l, int r) { xU9T8Lw
int i, j, k; 5d|hP4fEc
int mid = (l + r) / 2; fkk&pu
if (l == r) 1K\zamBg
return; upi\pXv
if ((mid - l) >= THRESHOLD) DXyRNE<G[C
mergeSort(data, temp, l, mid); VYG o;
else DsX+/)d
insertSort(data, l, mid - l + 1); JP{Y Q:NF
if ((r - mid) > THRESHOLD) ZW>iq M^9
mergeSort(data, temp, mid + 1, r); ~'lYQ[7
else 8GlRO4yd
insertSort(data, mid + 1, r - mid); VRE[vM'
;2N: =Rv
for (i = l; i <= mid; i++) { [$]qJ~kz
temp = data; @;;3B
} Ndmki 7A
for (j = 1; j <= r - mid; j++) { \&BT#8ELG
temp[r - j + 1] = data[j + mid]; c'md)nD2M
} H'a6] ]2
int a = temp[l]; d RIuA)0s
int b = temp[r]; [jnA?Ge:
for (i = l, j = r, k = l; k <= r; k++) { ++\s0A(e
if (a < b) { LiyR,e
data[k] = temp[i++]; ?LSwJ @#
a = temp; R/EpfYOX
} else { 4p<c|(f#
data[k] = temp[j--]; i4Da'Uk
b = temp[j]; Fa0Fl}L
} uxx(WS
} !:2_y'hA
} s+0n0C
T|k_$LH
/** pgd9_'[5
* @param data =j^>sg]
* @param l 2=IZD `{!
* @param i s.$:.*k
*/ 1$_|h@
private void insertSort(int[] data, int start, int len) { =C#22xqQ.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5Sz&j
} z?<Xx?Kk
} dt5`UBvUg
} UX24*0`\~
} d~qZ;uw
\)M EM=U
堆排序： 6DVHJ+WTV
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package org.rut.util.algorithm.support; s{uSU1lQn
c8h71Cr
import org.rut.util.algorithm.SortUtil; BN1,R] *;
+?'a2pUS
/** dnzZ\t>U
* @author treeroot X?7s
* @since 2006-2-2 Yij_'0vZ
* @version 1.0 3w&Z:<
*/ 6GMwB@ b
public class HeapSort implements SortUtil.Sort{ s:xt4<
nTv^][
/* (non-Javadoc) &8HJ4Vj2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9}T(m(WQVu
*/ `3^%ft~l
public void sort(int[] data) { 3[UaK`/1C
MaxHeap h=new MaxHeap(); /"@k_[O
h.init(data); 9]gV#uF
for(int i=0;i h.remove(); LS/ZZAN u
System.arraycopy(h.queue,1,data,0,data.length); 8a;;MJ)
} .R^q$U~v3
t=IM"ZgfL
private static class MaxHeap{ 0ZJrK\K;
6m0-he~
void init(int[] data){ 9Xe|*bT
this.queue=new int[data.length+1]; af_bG;
for(int i=0;i queue[++size]=data; QfV:&b`
fixUp(size); byHXRA)39
} ~? n)/i("
} R[W'LRh~:1
DD'RSV5]
private int size=0; G&q@B`I
zB8J|uG
private int[] queue; .Fx-$Yqy
~.Er
public int get() { \iH\N/
return queue[1]; .2 }5Dc,eR
} ? @- t.N
]Wn=Oc{F
public void remove() { 2,rjy|R`
SortUtil.swap(queue,1,size--); _N"c,P0
fixDown(1); fBLR
} b\vL^\bX8
file://fixdown mW)C=X%
private void fixDown(int k) { MZt&HbD-
int j; Na.)!h_Kn'
while ((j = k << 1) <= size) { b v4
if (j < size %26amp;%26amp; queue[j] j++; &4m;9<8\
if (queue[k]>queue[j]) file://不用交换 MtG~O;?8
break; `08}y*E
SortUtil.swap(queue,j,k); _]M:
k = j; k&= iye(
} qf*e2"~v
} ]#\/1!W
private void fixUp(int k) { 3J[ 5^
while (k > 1) { z:d+RMA
int j = k >> 1; &ER,;^H`6
if (queue[j]>queue[k]) o(YF`;OhvS
break; Lf+3nN
SortUtil.swap(queue,j,k); CTZ#QiNP
k = j; to#T+d.(v
} x8Nij:K#
} i}kMo@
%(~8a
} b/UjKNf@
jN%+)Kj0C)
} sDS0cc6e
sf,9Ym
SortUtil： pW5PF)([
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package org.rut.util.algorithm; =UV=F/Af^
(!koz'f
import org.rut.util.algorithm.support.BubbleSort; }/VSIS@Z
import org.rut.util.algorithm.support.HeapSort; m8 Ti{w(
import org.rut.util.algorithm.support.ImprovedMergeSort; 5wI j:s
import org.rut.util.algorithm.support.ImprovedQuickSort; {%8=qJ3@
import org.rut.util.algorithm.support.InsertSort; E#`JH
import org.rut.util.algorithm.support.MergeSort; {\5-b:#_
import org.rut.util.algorithm.support.QuickSort; Ip*[H#h
import org.rut.util.algorithm.support.SelectionSort; :i]g+</
import org.rut.util.algorithm.support.ShellSort; Cgn@@P5ZC
oI9-jW
/** 1A{iUddR
* @author treeroot QW>(LGG=
* @since 2006-2-2 h<FEe~
* @version 1.0 [zhcb+^5l
*/ O;RNmiVoq
public class SortUtil { ;Rd\yAG
public final static int INSERT = 1; 6gD|QC~;
public final static int BUBBLE = 2; }\d3
public final static int SELECTION = 3; y5:al7*P
public final static int SHELL = 4; TmdRB8N
public final static int QUICK = 5; -P$E)5?^
public final static int IMPROVED_QUICK = 6; Yd$64d7,h
public final static int MERGE = 7; N0&#fXO
public final static int IMPROVED_MERGE = 8; nXxSv~r
public final static int HEAP = 9; 5h>t4 [~
/[Sy;wn
public static void sort(int[] data) { UdX aC= Q
sort(data, IMPROVED_QUICK); #mbl4a
} Clzz!v
private static String[] name={ UE/N-K)`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mNApFwZ
}; >Av%[G5=h#
J9`[Qy\
private static Sort[] impl=new Sort[]{ Q)ZkUmW
new InsertSort(), 0:k ~lz
new BubbleSort(), *,p16"Q;
new SelectionSort(), fn'N^
new ShellSort(), }{@RO./)[
new QuickSort(), O:(%m
new ImprovedQuickSort(), QLAyX*%B
new MergeSort(), TkV$h(#!f&
new ImprovedMergeSort(), g bwg3$!9
new HeapSort() +hd1|qa4
}; 2`w\<h
aoS]Qp
public static String toString(int algorithm){ be5NasC
return name[algorithm-1]; vh6#Bc)i%w
} h}$]3/5H
4!tHJCq"
public static void sort(int[] data, int algorithm) { kC2_&L
impl[algorithm-1].sort(data); 8v']>5S]#
} m7~[f7U
1w|V'e?kb
public static interface Sort { _\2^s&iJh
public void sort(int[] data); o*1t)HL<
} &-6D'@
k0R;1lZ0n
public static void swap(int[] data, int i, int j) { {T[/B"QZG
int temp = data; rCO:39L-
data = data[j]; "rIBy
data[j] = temp; o'nrLI(t
} hy|X(m
} 2-M]!x)