[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; vQ{mEaH
} $@[Mo
int i1=l; R5<:3tk=X
int i2=mid+1; |lVi* 4za%
for(int cur=l;cur<=r;cur++){ vnX~OVz2
if(i1==mid+1) 8=mx5Gwz-
data[cur]=temp[i2++]; Nm3CeU
else if(i2>r) \r&(l1R
data[cur]=temp[i1++]; 'tVe#oI
else if(temp[i1] data[cur]=temp[i1++]; Wa%p+(\<uB
else X C'|
data[cur]=temp[i2++]; <h`}I3Ao
} =z}M(<G
} T`Xz*\}Zb
>~T2MlRux
} MnptC 1N
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改进后的归并排序: WX$AOnEv
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package org.rut.util.algorithm.support; }/7rA)_
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import org.rut.util.algorithm.SortUtil; YRj"]= 5N
m .^WSy
/** ~vfPsaRh
* @author treeroot M7neOQHq
* @since 2006-2-2 ket"fXqJX
* @version 1.0 U#4>GO;A
*/ a!;K+wL >
public class ImprovedMergeSort implements SortUtil.Sort { 1c$ce+n~
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private static final int THRESHOLD = 10; '8|joj>G=
f5.Be%
/* Vv>hr+e
* (non-Javadoc) zBqNE`
* t>"|~T$9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8ya|eJ]/L
*/ NHzVA*f
public void sort(int[] data) { YKa9]Q
int[] temp=new int[data.length]; 4o( Q+6m
mergeSort(data,temp,0,data.length-1); +qyx3c+
} vz)zl2F5sY
~&+8m=
private void mergeSort(int[] data, int[] temp, int l, int r) { 4TaHS!9
int i, j, k; szy2"~hm
int mid = (l + r) / 2; Kp/l2?J"
if (l == r) {JW_ZJx
return; 9NqZ&S
if ((mid - l) >= THRESHOLD) 4aG}ex-s|
mergeSort(data, temp, l, mid); w-``kID
else Oi~.z@@
insertSort(data, l, mid - l + 1); !Ee&e~"
if ((r - mid) > THRESHOLD) ~gOdK-SV*
mergeSort(data, temp, mid + 1, r); 7:OF>**
else }9L;|ul6
insertSort(data, mid + 1, r - mid); hj3wxH.}
iD:TKB_r
for (i = l; i <= mid; i++) { 8{p#Nl?U1
temp = data; kT&GsR/
} ?O/!pUAu
for (j = 1; j <= r - mid; j++) { /Fp@j/50
temp[r - j + 1] = data[j + mid]; +<c(;Ucl?
} #vT~D>zj
int a = temp[l]; R"e533
int b = temp[r]; ;x4yidb6
for (i = l, j = r, k = l; k <= r; k++) { Njs'v;-K
if (a < b) { *0%G`Q
data[k] = temp[i++]; nsi&r
a = temp; X1%_a.=VF
} else { c)17[9"
data[k] = temp[j--]; R9%"Kxm
b = temp[j]; N1'$;9 c
} '6Yx03t
} us^J! s7
} c nV2}U/\
'_o(I
/** <#7j~<
* @param data 1zY"Uxp
* @param l q]m$%>
* @param i Iyt.`z
*/ !Bb^M3iA
private void insertSort(int[] data, int start, int len) { ngH_p>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S{qsq\X
} r1|;V~a$~
} bcFZ~B
} THnZbh4#)
} P64<O5l/
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堆排序： i8`0-
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package org.rut.util.algorithm.support; DX8pd5U
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import org.rut.util.algorithm.SortUtil; XE :JL_
+L#Q3}=s
/** Bfr$&?j#
* @author treeroot g}*F"k4j
* @since 2006-2-2 Z<$y)bf
* @version 1.0 (hIy31Pf
*/ 'E1m-kJz
public class HeapSort implements SortUtil.Sort{ a &tl@y1
-l q,~`v
/* (non-Javadoc) {us"=JJVN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lNqF@eCT9
*/ <qCfw>%2F
public void sort(int[] data) { 3[iHe+U(
MaxHeap h=new MaxHeap(); ~_"/\;1
h.init(data); mO^vKq4r.
for(int i=0;i h.remove(); ~Z x_"
System.arraycopy(h.queue,1,data,0,data.length); 1WLaJ%Fv
} of?'FrU
33b 3v\N
private static class MaxHeap{ BW&)Zz
_.3O(?p,
void init(int[] data){ 5KwT(R o
this.queue=new int[data.length+1]; %8T"h
for(int i=0;i queue[++size]=data; !Ytr4DtM
fixUp(size); dO\irv)
} %jmL#IN)
} >^%TY^7n
%PxJnMb?
private int size=0; @wOX</_g
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private int[] queue; OqA#4h4^
OG}m+K&<
public int get() { :<>=,`vQD
return queue[1]; ~>|o3&G{
} TTzvH;S
O{nM yB
public void remove() { I]Jz[{~1
SortUtil.swap(queue,1,size--); D]$X@2A
fixDown(1); o"@GYc["
} t5jZ8&M5]
file://fixdown fkK42*U@r
private void fixDown(int k) { \Dr?}D
int j; 4Rev7Mc
while ((j = k << 1) <= size) { h;2n2.Q
if (j < size %26amp;%26amp; queue[j] j++; A>W8^|l6+-
if (queue[k]>queue[j]) file://不用交换 p1(<F_Kta
break; rP7f~"L
SortUtil.swap(queue,j,k); @b"J FB|
k = j; h[I~D`q)v
} *S=zJyAO
} O#S27.
private void fixUp(int k) { gN/6%,H}
while (k > 1) { 8.4+4Vxh
int j = k >> 1; \*k}RKDwT
if (queue[j]>queue[k]) eNw9"X}g
break; @XFy^?
SortUtil.swap(queue,j,k); r__Y{&IO
k = j; =dTsGNz
} gl~>MasV&
} .l(t\BfE~
Ud[Zv?tA:
} "]0sR
a}MSA/K(
} ^+zhzfJ
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SortUtil： |]8Hh>
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package org.rut.util.algorithm; _0(Bx?[h
Pf?y!dK<
import org.rut.util.algorithm.support.BubbleSort; ^&6'FE
import org.rut.util.algorithm.support.HeapSort; \<K@t=/ 6
import org.rut.util.algorithm.support.ImprovedMergeSort; UN6Du\)]d
import org.rut.util.algorithm.support.ImprovedQuickSort; p?,:
import org.rut.util.algorithm.support.InsertSort; R#UcwX}o
import org.rut.util.algorithm.support.MergeSort; fd} Ul
import org.rut.util.algorithm.support.QuickSort; |T@\-8Ok
import org.rut.util.algorithm.support.SelectionSort; (:2,Rr1"
import org.rut.util.algorithm.support.ShellSort; `cBV+00YS
m?Qr)F_M
/** 3>t^Xu~
* @author treeroot ME%W,B.|"s
* @since 2006-2-2 jk'.Gz
* @version 1.0 :;(zA_-
*/ 46cd5SLK
public class SortUtil { _mJnhT3
public final static int INSERT = 1; DHlCus=ic
public final static int BUBBLE = 2; i-`n5,
public final static int SELECTION = 3; R<jt$--H
public final static int SHELL = 4; }+4^ZbX+:
public final static int QUICK = 5; <Fa]k'<^)
public final static int IMPROVED_QUICK = 6; io{uN/!X_J
public final static int MERGE = 7; ZW0gd7Wh
public final static int IMPROVED_MERGE = 8; 43 h0i-%1
public final static int HEAP = 9; xVn"xk
qvH7otA
public static void sort(int[] data) { U*sQYt<?g
sort(data, IMPROVED_QUICK); >u:t2DxE
} mgxoM|n6
private static String[] name={ ufekhj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7jL3mI;n%;
}; 3j iSvrfI
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private static Sort[] impl=new Sort[]{ lSzLR~=Au
new InsertSort(), `Z:5E
new BubbleSort(), [spJ%AhV
new SelectionSort(), L| uoFG{
new ShellSort(), =6sL}$
new QuickSort(), Pgg\(D#X`
new ImprovedQuickSort(), ub0uxvz
new MergeSort(), gI SP .
new ImprovedMergeSort(), >5Rcj(-&l
new HeapSort() XJG"Zr9
}; RN3-:Zd_X
XH?}0D(
public static String toString(int algorithm){ 4G4[IAu_
return name[algorithm-1]; :7w^2/ZGo
} " tUS>c/
l12_&o"C~
public static void sort(int[] data, int algorithm) { {T0f]]}Q
impl[algorithm-1].sort(data); z"@yE*6
} IP]"D"
[8o!X)
public static interface Sort { xA-u%Vf7@
public void sort(int[] data); nf7l}^/UE
} eKq`t.*Ft
QKAo}1Pq
public static void swap(int[] data, int i, int j) { dBKceL v
int temp = data; zIyMq3
data = data[j]; 5ZRO{rf
data[j] = temp; _'yN4>=6u
} IU8/B+hM~
} xsPE UK&g