[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; 9uxoMjR-
} p!E*ANwX
int i1=l; AIP0PJI3
int i2=mid+1; M7qg\1L
for(int cur=l;cur<=r;cur++){ |+h x2?Nv
if(i1==mid+1) k6 OO\=
data[cur]=temp[i2++]; &LV'"2ng8
else if(i2>r) =n.&N
data[cur]=temp[i1++]; {U9{*e$=
else if(temp[i1] data[cur]=temp[i1++]; GB+$ed5@<
else 7IUJHc[R?
data[cur]=temp[i2++]; vmxS^_I
} ^E, #}cW
} .&u @-Vm
oJVdFE
} Zp/P/97p
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改进后的归并排序: Zc";R!At
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package org.rut.util.algorithm.support; >]B_+r0m^
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import org.rut.util.algorithm.SortUtil; 7yG%E
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/** W<#Kam:8e
* @author treeroot 9a:(ab'
* @since 2006-2-2 C^?/9\
* @version 1.0 2x gk$E$7
*/ 5> 81Vhc,
public class ImprovedMergeSort implements SortUtil.Sort { Z%sTj6Th
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private static final int THRESHOLD = 10; k(`>(w
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/* u$qasII
* (non-Javadoc) VaonG]Ues
* Yi-,Pb?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {DVMs|5;^
*/ 5/hgWG6.t
public void sort(int[] data) { Us[F@
int[] temp=new int[data.length]; _or_Vw!
mergeSort(data,temp,0,data.length-1); asW W@E
} {#t7lV'4
3W[||V[r]<
private void mergeSort(int[] data, int[] temp, int l, int r) { \0*dKgN
int i, j, k; Ut%{pc 7^F
int mid = (l + r) / 2; Vf(..8
if (l == r) [+@T"2h2b
return; 9qq6P!
if ((mid - l) >= THRESHOLD) 6XAofN/5f
mergeSort(data, temp, l, mid); E.B6u, Te
else eiA$) rzy
insertSort(data, l, mid - l + 1); N+]HJ`K
if ((r - mid) > THRESHOLD) 5IgO4<B
mergeSort(data, temp, mid + 1, r); un`4q-S7
else RdjoVCf
insertSort(data, mid + 1, r - mid); #T>pu/EQX_
Bi/E{k,
for (i = l; i <= mid; i++) { y2B'0l
temp = data; jlyuu
} do l8O
for (j = 1; j <= r - mid; j++) { IUG}Q7w5
temp[r - j + 1] = data[j + mid]; !h^_2IX
} :VR%I;g;
int a = temp[l]; Q{ g{
int b = temp[r]; f(EO|d^u
for (i = l, j = r, k = l; k <= r; k++) { 5o^\jTEl^
if (a < b) { M"Y,kA|+
data[k] = temp[i++]; =Q# (2
a = temp; %4wHiCOg
} else { 2/))Y\~
data[k] = temp[j--]; 4?_^7(%p
b = temp[j]; R<r,&X?m
} Fbw.Y6
} M3fTUCR
} ]<;y_
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/** =+VDb5= TV
* @param data msq2/sS~
* @param l ziQ&M\
* @param i Wq25,M'
*/ ayg^js2,
private void insertSort(int[] data, int start, int len) { I!Fd~g9I4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Vc8w[oS
} B;<zA' 1
} a 4?c~bs
} UD&pL'{s
} e[QEOx/-h2
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堆排序： /W{^hVkvC
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package org.rut.util.algorithm.support; ~'Korxa
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import org.rut.util.algorithm.SortUtil; r+a0.
@><8YN^)%
/** 7Xh ;dJAF3
* @author treeroot _]< Tv3]RK
* @since 2006-2-2 L7yEgYB
* @version 1.0 ] `;Fc8$
*/ OFZo"XtF
public class HeapSort implements SortUtil.Sort{ *b`1+~p_2
&<(&u`S
/* (non-Javadoc) 'qoaMJxN`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bW GMgC
*/ "Qk)EY
public void sort(int[] data) { pWeD,!f
MaxHeap h=new MaxHeap(); m>DJ w7<
h.init(data); 0J.]`kR
for(int i=0;i h.remove(); @f#6Nu
System.arraycopy(h.queue,1,data,0,data.length); k4JTc2b
} fTGVG
]_m(q`_
private static class MaxHeap{ 4SIS#m
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void init(int[] data){ +@+*sVb
this.queue=new int[data.length+1]; );xTl6Y9
for(int i=0;i queue[++size]=data; gZL,xX
fixUp(size); DLoH.Fd
} FY,)iZ}Pq
} 6^,;^
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private int size=0; gS!zaD7Nr
>B$B|g~
private int[] queue; MVDy|i4
X(;WY^i!
public int get() { <@>l9_=R
return queue[1]; }4q1"iMlO
} N3\vd_D(
vSo,,~F
public void remove() { nz/cs n
SortUtil.swap(queue,1,size--); nR,QqIFFw
fixDown(1); g7v(g?
} (J.U{N v
file://fixdown Sj<]~*y"
private void fixDown(int k) { b%xG^jUXsX
int j; }u;`k'J@
while ((j = k << 1) <= size) { GjX6noqT
if (j < size %26amp;%26amp; queue[j] j++; cJ'OqV F
if (queue[k]>queue[j]) file://不用交换 -]Aqt/w"l
break; [$`%ve
SortUtil.swap(queue,j,k); ]9}^}U1."
k = j; /Uni6O)oc
} OyIIJ!(
} dlioaYc
private void fixUp(int k) { d*LW32B@
while (k > 1) { zCmx1Djz
int j = k >> 1; ,b t j6hg
if (queue[j]>queue[k]) rb]?"lizi
break; |}o3EX
SortUtil.swap(queue,j,k); /PEL[Os
k = j; :CP,DO
} ka*#O"}L8
} FlT5R*m
Cq}E5M
} yXCHBz6&
%0%Tp
} tcJN`N
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SortUtil： 2~%^y6lR
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package org.rut.util.algorithm; C~04#z_$
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import org.rut.util.algorithm.support.BubbleSort; aqv'c j>
import org.rut.util.algorithm.support.HeapSort; 1/J6<FVq
import org.rut.util.algorithm.support.ImprovedMergeSort; j7J'd?l
import org.rut.util.algorithm.support.ImprovedQuickSort; nPUD6<bF
import org.rut.util.algorithm.support.InsertSort; #cqI0ny?G
import org.rut.util.algorithm.support.MergeSort; I MG^L
import org.rut.util.algorithm.support.QuickSort; NJg )S2]7
import org.rut.util.algorithm.support.SelectionSort; 4-oaq'//BT
import org.rut.util.algorithm.support.ShellSort; mTLJajE/
]$I}r= Em
/** /z: mi
* @author treeroot =G`g-E2
* @since 2006-2-2 dEZlJo@J
* @version 1.0 W@D./Th
*/ _P*QX
public class SortUtil { wv^n#
public final static int INSERT = 1; ~,.;2K73
public final static int BUBBLE = 2; tNz(s)
public final static int SELECTION = 3; Sv!JA#Ag
public final static int SHELL = 4; ==EB\>g|
public final static int QUICK = 5; 4u#TKr.
public final static int IMPROVED_QUICK = 6; @I#uv|=N
public final static int MERGE = 7; P+DIo7VTX
public final static int IMPROVED_MERGE = 8; dj{~!}
public final static int HEAP = 9; bbT$$b-
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public static void sort(int[] data) { P=Su)c
sort(data, IMPROVED_QUICK); z#2n+hwE
} |^"0bu"
private static String[] name={ S:1g(f*85
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,(NN)Oj
}; h=B= J
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private static Sort[] impl=new Sort[]{ eg24.W9c
new InsertSort(), N! I$Qtr,
new BubbleSort(), R[OXYHu
new SelectionSort(), L2OR<3*|Av
new ShellSort(), J M`[|"R%
new QuickSort(), Rx?ze(
new ImprovedQuickSort(), I moxg+u
new MergeSort(), my#\(E+
new ImprovedMergeSort(), R[@}Lg7+v
new HeapSort() X!m lC51
}; ilAhw4A
13+.>
public static String toString(int algorithm){ >T-4!ZvS\j
return name[algorithm-1]; YLuf2ja}X
} Y(R.<LtY
egVKAR-
public static void sort(int[] data, int algorithm) { zE~Xxp
impl[algorithm-1].sort(data); rR 86D
} zjOOEvi
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public static interface Sort { K~B
public void sort(int[] data); =}.gU WV
} P>(FCX
;; ;=)'o
public static void swap(int[] data, int i, int j) { ?:G 3U\M
int temp = data; c3r`T{Kf
data = data[j]; b`@J"E}
data[j] = temp; Je}0KW3G9L
} +wxsAGy_j
} 7Gy:T47T\@