[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; R3ru<u>k&
} sqP (1|9
int i1=l; 1*ui|fuK
int i2=mid+1; <zhN7="
for(int cur=l;cur<=r;cur++){ C lekB
if(i1==mid+1) Mo_(WSs
data[cur]=temp[i2++]; "0#d F:qt
else if(i2>r) H:>i:\J/M9
data[cur]=temp[i1++]; 1.y|bB+kB
else if(temp[i1] data[cur]=temp[i1++]; K`#bLCXEV0
else :{ Q[kYj
data[cur]=temp[i2++]; ";$rcg"%X
} qZ|>{^a*
} @ob4y
(zL(
} }[m,HA<j
tNbZ{=I>
改进后的归并排序: v6q oH)n
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package org.rut.util.algorithm.support; o9#8q_D9
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import org.rut.util.algorithm.SortUtil; BT8L'qEj
>V1v.JH
/** Y6r<+#V
* @author treeroot x=~$ik++
* @since 2006-2-2 '#p2v'A
* @version 1.0 7lYiufg
*/ G>yTv`-
public class ImprovedMergeSort implements SortUtil.Sort { :Lze8oY(D}
zxffjz,Fe:
private static final int THRESHOLD = 10; oz[: T3oE>
`bx}!;{lx
/* 6o!Y^^/U
* (non-Javadoc) V'jvI
* 5fqQ;r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "hi)p9 _cR
*/ HE0@`(mCpa
public void sort(int[] data) { 98x&2(N
int[] temp=new int[data.length]; >p;cbp[ht
mergeSort(data,temp,0,data.length-1); #)hJ.0~3
} Bp>Z?"hTe
u>W:SM
private void mergeSort(int[] data, int[] temp, int l, int r) { MX\v2["FoV
int i, j, k; zv}3Sl@
int mid = (l + r) / 2; 3}lT"K
if (l == r) q"O4}4`
return; wz{]CQ7"
if ((mid - l) >= THRESHOLD) wW?/`>@
mergeSort(data, temp, l, mid); vjz*B$
else Gl@}b\TB
insertSort(data, l, mid - l + 1); OELh6R
if ((r - mid) > THRESHOLD) LWp#i8,
mergeSort(data, temp, mid + 1, r); 0v/}W(
else z1R_a=7
insertSort(data, mid + 1, r - mid); PH]/*LEj
0M_~@E*&
for (i = l; i <= mid; i++) { 3!:?OUhx
temp = data; EiP#xjn?c
} h~R= ?%H[
for (j = 1; j <= r - mid; j++) { N=[# "4I
temp[r - j + 1] = data[j + mid]; }2nmfm!
} mOQN$d[
int a = temp[l]; e[)oT
int b = temp[r]; yRF %SWO
for (i = l, j = r, k = l; k <= r; k++) { dNg5#?mzT5
if (a < b) { ap y#8]
data[k] = temp[i++]; XD=p:Ezh
a = temp; Ns}BE H
} else { WY)*3?
data[k] = temp[j--]; ] eO25,6
b = temp[j]; Dq:>]4%
} +i0j3.
} 8pZGu8
} lUJ~_`D
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/** D`e6#1DbJ
* @param data Svun RUE-f
* @param l Ga M:/.
* @param i R@[gkj
*/ Q?uHdmY*X
private void insertSort(int[] data, int start, int len) { xh) h#p.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nB .?=eUa
} <bbC&O\
} z +NwGVk3
} jf WZLb)
} ;[,r./XmH
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堆排序： T4lE-g2%M
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package org.rut.util.algorithm.support; lcqpwSk
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import org.rut.util.algorithm.SortUtil; 41Nm+$m
zD z"Dn9
/** ;?K>dWf3f
* @author treeroot lCAD $Ia~
* @since 2006-2-2 ~p* \|YC
* @version 1.0 s=BJ7iU_68
*/ Y:-O/X
public class HeapSort implements SortUtil.Sort{ Q%Fa1h:2&
s`63 y&Z[
/* (non-Javadoc) bAVlL&^@|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b Y^K)0+^s
*/ (G<fvl!~
public void sort(int[] data) { 1@"os[9
MaxHeap h=new MaxHeap(); alV{| Vf[6
h.init(data); WnkIi,<
for(int i=0;i h.remove(); \]y /EOT
System.arraycopy(h.queue,1,data,0,data.length); cq#=Vb
} &]_2tN=S$
lv=rL
private static class MaxHeap{ =(cfo_B@K
7(W"NF{r
void init(int[] data){ snm1EPj
this.queue=new int[data.length+1]; u#^~([I
for(int i=0;i queue[++size]=data; aSVR+of
fixUp(size); j+6`nN7L
} pHKGK7 S-
} (S)jV0
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private int size=0; N}rc3d#
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private int[] queue; P'<D0
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public int get() { _>=QZ`!r
return queue[1]; 'U/X<LCl
} 'irHpN6n
=f\BAi
public void remove() { EWNm }C9
SortUtil.swap(queue,1,size--); :|PI_ $4H
fixDown(1); .wvgHi
} $z[r(a^a
file://fixdown kX8Ey
private void fixDown(int k) { L+N;mI8
int j; 5`QN<4?%
while ((j = k << 1) <= size) { .jK,6't^
if (j < size %26amp;%26amp; queue[j] j++; %SKJ#b
if (queue[k]>queue[j]) file://不用交换 og)f?4
break; U3OXO1
SortUtil.swap(queue,j,k); L[aA4`
k = j; E~K5n2CI
} f C_H0h3
} H5X.CcI&}
private void fixUp(int k) { r t\eze_5A
while (k > 1) { "IuPg=|#
int j = k >> 1; %Xjg/5G-
if (queue[j]>queue[k]) Jnl#d0) -
break; FL?Ndy"I
SortUtil.swap(queue,j,k); FwaYp\z
k = j; gWLhO|y
} ^nGKuW7\
} 0Ma3
Qt(4N!j
} W)p?cK`
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} sRaTRL2
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SortUtil： gt|:K)[,6
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package org.rut.util.algorithm; >4iVVs
9~ rYLR(v
import org.rut.util.algorithm.support.BubbleSort; 8L _]_
import org.rut.util.algorithm.support.HeapSort; M%"{OHj!o
import org.rut.util.algorithm.support.ImprovedMergeSort; ^\3r}kJ0Lp
import org.rut.util.algorithm.support.ImprovedQuickSort; Uf\,U8UB
import org.rut.util.algorithm.support.InsertSort; \@F~4,VT
import org.rut.util.algorithm.support.MergeSort; u81@vEK:_
import org.rut.util.algorithm.support.QuickSort; e{E8_2d
import org.rut.util.algorithm.support.SelectionSort; ("txj[v-/
import org.rut.util.algorithm.support.ShellSort; -]!zj#&
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/** 0*F<tg,+]
* @author treeroot k@Mt8Ln
* @since 2006-2-2 \I+#M-V
* @version 1.0 =PAsyj
*/ q:vc;y
public class SortUtil { W`gzMx
public final static int INSERT = 1; fZ[uNe[|
public final static int BUBBLE = 2; k#DMd9
public final static int SELECTION = 3; mr<camL5
public final static int SHELL = 4; @l %x;`E
public final static int QUICK = 5; y\@INA^
public final static int IMPROVED_QUICK = 6; 1T/ 72+R0
public final static int MERGE = 7; r"bV{v
public final static int IMPROVED_MERGE = 8; 4ztU) 1
public final static int HEAP = 9; \Jm^XXgS
>})W5Y+
public static void sort(int[] data) { z 8y.@<6
sort(data, IMPROVED_QUICK); y41,T&ja
} 5Zy%Nam'gN
private static String[] name={ W+`T:Mgh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y$`@QRW
}; Y wu > k
:`<ME/"YE
private static Sort[] impl=new Sort[]{ o3,}X@p
new InsertSort(), 2!Sl!x+i\'
new BubbleSort(), Y"UB\_=
new SelectionSort(), u=f}t=3
new ShellSort(), D V=xqC6}
new QuickSort(), nk.j7tu
new ImprovedQuickSort(), FfpP<(4
new MergeSort(), TaNcnAY>9
new ImprovedMergeSort(), +Z1y1%a
new HeapSort() =BroH\
}; ihBIE
Cd'`rs}3
public static String toString(int algorithm){ ,}a'h4C
return name[algorithm-1]; &b9bb{y_$K
} x't@Mc
?AYb@&%
public static void sort(int[] data, int algorithm) { B'8T+qvA
impl[algorithm-1].sort(data); 91\]Dg
} Y0xn}:%K
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public static interface Sort { ]CGH )4Pe
public void sort(int[] data); [iUy_ C=qp
} 7QM1E(cMg
Vl`!6.F3
public static void swap(int[] data, int i, int j) { \kEC|O)8
int temp = data; LtVIvZie
data = data[j]; )JXy>q#
data[j] = temp; YES-,;ZQ'
} h42dk(B
} 8Bwm+LYr-