[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; @MS;qoc
} [<7Hy,xr_
int i1=l; +U% = w8b
int i2=mid+1; $s$z"<
for(int cur=l;cur<=r;cur++){ u-=%gx"Di
if(i1==mid+1) BJwPSKL
data[cur]=temp[i2++]; \XD&0inv
else if(i2>r) 1 f).J
data[cur]=temp[i1++]; x<4-Q6'{S
else if(temp[i1] data[cur]=temp[i1++]; UJ<eF/KSmG
else 1@im+R?a
data[cur]=temp[i2++]; ](vOH#E
} t?iCq1
} UF3WpA
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} ,~p'p)
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改进后的归并排序: s8Xort&
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package org.rut.util.algorithm.support; dnSjXyjFB
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import org.rut.util.algorithm.SortUtil; JL=MlZ
B0T[[%~3M
/** VnAJOR7lrx
* @author treeroot !c(B c^
* @since 2006-2-2 P33x/#VVE
* @version 1.0 Ox#%Dm2
*/ 2&S*> (
public class ImprovedMergeSort implements SortUtil.Sort { OB FG!.)
QK)"-y}"g
private static final int THRESHOLD = 10; Pfj{TT.#L
sg RY`U.C
/* x >hnH{~w
* (non-Javadoc) X`YAJG
* icLf;@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GSj04-T"
*/ ]{;=<t6
public void sort(int[] data) { ]-FK6jw
int[] temp=new int[data.length]; Y5M>&}N
mergeSort(data,temp,0,data.length-1); !)FM/Xj,o
} Nz %{T
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private void mergeSort(int[] data, int[] temp, int l, int r) { B/hL
int i, j, k; $)t ]av
int mid = (l + r) / 2; ]U.1z
if (l == r) `],'fT|,S
return; eAR]~ NiW
if ((mid - l) >= THRESHOLD) hY XH9:
mergeSort(data, temp, l, mid); Uv?s<
else ]c%yib
insertSort(data, l, mid - l + 1); u?6L.^Op
if ((r - mid) > THRESHOLD) aUUr&yf_L
mergeSort(data, temp, mid + 1, r); Exd$v"s Y
else 7/%{7q3G>
insertSort(data, mid + 1, r - mid); T5(]/v,UT
mv_N ns
for (i = l; i <= mid; i++) { uSh!A
temp = data; hqOy*!8'@
} frV*+
for (j = 1; j <= r - mid; j++) { B@XnHh5y
temp[r - j + 1] = data[j + mid]; szW_cjS
} t-7^deG'/n
int a = temp[l]; #~<cp)!3
int b = temp[r]; )bN|*Bw3
for (i = l, j = r, k = l; k <= r; k++) { mkH{%7n
if (a < b) { "|<6bA
data[k] = temp[i++]; k1Cx~Q)XC
a = temp; -ZwQL="t
} else { CZaUrr
data[k] = temp[j--]; U,Py+c6
b = temp[j]; yM}b
} mqxgrb7
} &s m7R i
} {KkP"j'7h
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/** "A\.`*6
* @param data '@OqWdaR
* @param l m]LR4V6k|
* @param i rw>X JE
*/ H{}0-0o
private void insertSort(int[] data, int start, int len) { ukM11LD5x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sbnNk(XINQ
} !J<}=G5
} pZ4]KxX@
} "p]bsJG
} JBX#U@k>I
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堆排序： 8w,U[aJm
n27df9L
package org.rut.util.algorithm.support; /B>p.%M[&
+bC-_xGuh
import org.rut.util.algorithm.SortUtil; a3}#lY):
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/** g )H>Uu5@
* @author treeroot 1O" Mo
* @since 2006-2-2 ERSo&8
* @version 1.0 8Q $fXB
*/ o5~o Rmsr
public class HeapSort implements SortUtil.Sort{ jTVh`d<N
^(,qkq'u D
/* (non-Javadoc) Ec!fx\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d GEMrjx
*/ ];@"-H
public void sort(int[] data) { (`V
MaxHeap h=new MaxHeap(); NpS*]vSO
h.init(data); lgR;V]^YX
for(int i=0;i h.remove(); WH`E=p^x4
System.arraycopy(h.queue,1,data,0,data.length); Be?b| G!M
} (dSf>p r2
j1{@?
private static class MaxHeap{ |Ld/{&Qr
K.A!?U=
void init(int[] data){ 'EsN{.l?
this.queue=new int[data.length+1]; q:OSQ~U_
for(int i=0;i queue[++size]=data; hVvPI1[2
fixUp(size); EBF608nWfW
} 8Lm}x_
} k+*DPo@)
/SLAg&
private int size=0; `o7m)T')
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private int[] queue; hAHZN^x&
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public int get() { -b1VY4m-
return queue[1]; k_A.aYe
} ppv/A4Kv
uFd.2,XNP
public void remove() { BIx Z4Ft
SortUtil.swap(queue,1,size--); ]k2Jf}|
fixDown(1); B?}ZAw>
} %m\dNUz4g
file://fixdown .gmNE$d
private void fixDown(int k) { *0y|0J+0
int j; GWs[a$|
while ((j = k << 1) <= size) { $`J'Y>`
if (j < size %26amp;%26amp; queue[j] j++; C^uH]WO
if (queue[k]>queue[j]) file://不用交换 y@&Cn
break; ?sb Ob
SortUtil.swap(queue,j,k); !ueyVE$1
k = j; b>R/=tx
} 4H4U
} FB<#N+L\
private void fixUp(int k) { b_Us%{
while (k > 1) { oH/6
int j = k >> 1; a<CN2e_Z
if (queue[j]>queue[k]) mp2J|!Lx
break; YyR)2j1O
SortUtil.swap(queue,j,k); W}6(;tI
k = j; ,3^gB,ka
} R(dVE\u
} Qz*!jwg
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} zo*YPDEm"
x,W)qv
} =*Z=My}3~
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SortUtil： G\8ps~3T
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package org.rut.util.algorithm; LQVa,'
5@3[t`n'
import org.rut.util.algorithm.support.BubbleSort; p7b`Z>}
import org.rut.util.algorithm.support.HeapSort; hQ!slO
import org.rut.util.algorithm.support.ImprovedMergeSort; 0i}4T:J@`
import org.rut.util.algorithm.support.ImprovedQuickSort; 4_3O?IY
import org.rut.util.algorithm.support.InsertSort; ]d#Lfgo
import org.rut.util.algorithm.support.MergeSort; odxsF(Q0p
import org.rut.util.algorithm.support.QuickSort; KjR^6v
import org.rut.util.algorithm.support.SelectionSort; >*ey 7g
import org.rut.util.algorithm.support.ShellSort; R["2kEF
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/** 2mS3gk
* @author treeroot %x_c2
* @since 2006-2-2 ZA@QP1
* @version 1.0 5ru&In&
*/ Kp") %p#
public class SortUtil { [uxhdR`T
public final static int INSERT = 1; 4^1B'>I
public final static int BUBBLE = 2; _RG!lmJV
public final static int SELECTION = 3; zNT~-
public final static int SHELL = 4; J{$+\
public final static int QUICK = 5; D`]Lm24_]
public final static int IMPROVED_QUICK = 6; #W#GI"K
public final static int MERGE = 7; /1-
public final static int IMPROVED_MERGE = 8; xao'L
public final static int HEAP = 9; J%']t$AR
aaq{9Y#
public static void sort(int[] data) { w[w{~`([",
sort(data, IMPROVED_QUICK); JlAUie8
} m%ZJp7C
private static String[] name={ <b!ieK?\F3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XHuY'\;-
}; mIVnc`3s
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private static Sort[] impl=new Sort[]{ }^uUw&
new InsertSort(), ?29zcuRaru
new BubbleSort(), }IvJIr
new SelectionSort(), v)@EK6Nty
new ShellSort(), }49X N
new QuickSort(), %Kd&A*
new ImprovedQuickSort(), U,"lOG'
new MergeSort(), ia15r\4j)
new ImprovedMergeSort(), c;_GZ}8
new HeapSort() 9`}Wp2
}; GF5WR e(E
6U;pYWht
public static String toString(int algorithm){ (g,lDU[=
return name[algorithm-1]; <N"t[N70;
} rDkAeX0
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public static void sort(int[] data, int algorithm) { nd 'K4q
impl[algorithm-1].sort(data); md7Aqh
} :kSA^w8
PT4Xr=z =
public static interface Sort { @`2<^-r\
public void sort(int[] data); M.1bRB
} r,=xI`XH
!cnunLc`
public static void swap(int[] data, int i, int j) { a9z|ef
int temp = data; :@w ;no>=*
data = data[j]; :T3I"
data[j] = temp; ";B.^pBv@;
} TF 6_4t6
} r$=MBeT