[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; a\]glw\;
} tX'2 $}
int i1=l; yZc_PC`
int i2=mid+1; [!'fE#"a
for(int cur=l;cur<=r;cur++){ |9*8u>|RC
if(i1==mid+1) :41Ch^\E
data[cur]=temp[i2++]; aFf(m-
else if(i2>r) /UP1*L
data[cur]=temp[i1++]; g*-%.fNA
else if(temp[i1] data[cur]=temp[i1++]; o-7,P RmKN
else 2zN"*Wkn
data[cur]=temp[i2++]; i[V\RKH*F
} +>Xe_
} @en*JxIM
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} ,B8u?{O
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改进后的归并排序: ?j^:jV
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package org.rut.util.algorithm.support; j.O+e|kxU
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import org.rut.util.algorithm.SortUtil; QTLGM-Z
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/** S|pf.l
* @author treeroot Ax{C ^u
* @since 2006-2-2 U rL|r.
* @version 1.0 (JI[y"2
*/ e,8[fp-7
public class ImprovedMergeSort implements SortUtil.Sort { Z#znA4;)
< ?{ic2j#
private static final int THRESHOLD = 10; qS?uMms7w
tcD DX'S
/* e?yrx6
* (non-Javadoc) J2avt
* HY>zgf,0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u [Dz~
*/ ,.,spoV
public void sort(int[] data) { 8m"(T-wb6{
int[] temp=new int[data.length]; efXiZ
mergeSort(data,temp,0,data.length-1); R^k)^!/$f
} lNbAt4]}f(
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private void mergeSort(int[] data, int[] temp, int l, int r) { X')t6DQ(I
int i, j, k; 155vY
int mid = (l + r) / 2; P+<4w
if (l == r) /{%p%Q[X
return; c\DMeYrg
if ((mid - l) >= THRESHOLD) yBkcYHT
mergeSort(data, temp, l, mid); *&O4b3R
else \PL0-.t,
insertSort(data, l, mid - l + 1); CAbR+y
if ((r - mid) > THRESHOLD) YS0^!7u
mergeSort(data, temp, mid + 1, r); mV++7DY
else VxW>XxG0
insertSort(data, mid + 1, r - mid); \IX|{]*D
^`+Kjhht
for (i = l; i <= mid; i++) { ;|r<mT/,
temp = data; B1 Y
} c0f8*O4i
for (j = 1; j <= r - mid; j++) { b"pN;v
temp[r - j + 1] = data[j + mid]; EV[ BB;eb
} 9][A1+"
int a = temp[l]; k< $(
int b = temp[r]; B+4WnR1%T
for (i = l, j = r, k = l; k <= r; k++) { M~l\rg8
if (a < b) { fM!@cph(8
data[k] = temp[i++]; 4WXr~?Vq9
a = temp; FM,o&0HSd
} else { zT+ "Z(oz,
data[k] = temp[j--]; e!N%
b = temp[j]; uFnq3m^u
} <Gj]XAoe%
} d$B+xW
} @S)p{T5G
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/** t*wV<b
* @param data x\b+B
* @param l \2[sUY<W
* @param i vRMGNz_P7[
*/ q'KXn0IY#
private void insertSort(int[] data, int start, int len) { 1 EwCF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C:ntr=3J
} v(`5exWV
} d~;U-
} CZ.HQc
} o+g\\5s
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堆排序： O2S{*D={
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package org.rut.util.algorithm.support; T854}RX[{
~}g)N
import org.rut.util.algorithm.SortUtil; \me-#: Gu
I>:.fHvUC
/** >K*TgG6!X
* @author treeroot ofuQ`g1hb
* @since 2006-2-2 MZS/o3
* @version 1.0 6.6x$y3v
*/ TlpQ9T
public class HeapSort implements SortUtil.Sort{ O#`y;%
no9=K4h`
/* (non-Javadoc) N >k,"=N/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `o6T)49
*/ mhMRY9ahB
public void sort(int[] data) { -~_;9[uV
MaxHeap h=new MaxHeap(); i+~H~k}"X
h.init(data); [='<K
for(int i=0;i h.remove(); C8$/z>tQ
System.arraycopy(h.queue,1,data,0,data.length); [-h=L Jf#
} &?M'(` ~
v2}>/b)
private static class MaxHeap{ <^"0A
bix}#M
void init(int[] data){ Xagz(tm/
this.queue=new int[data.length+1]; (5>IF,}!L
for(int i=0;i queue[++size]=data; w C-x'
fixUp(size); 6&L8{P
} L87=*_!B;
} .`+N+B(4
X@Yl<9|i
private int size=0; m-R`(
{%QWv%|
private int[] queue; ^i6`w_/
q@}tv=}
public int get() { uY:u[
return queue[1]; =EUi|T4:
} nACKSsWqI
^\FOMGai
public void remove() { HfA@tZ5q|U
SortUtil.swap(queue,1,size--); kRB2J3Nt.
fixDown(1); L%fJH_$_s
} { u1\M
file://fixdown =QW:},sp
private void fixDown(int k) { ;{ESo?$*
int j; ef]60OtP
while ((j = k << 1) <= size) { b0[H{q-z{X
if (j < size %26amp;%26amp; queue[j] j++; >?ckBU9
if (queue[k]>queue[j]) file://不用交换 ])mYE }g
break; ,dSP%?vV
SortUtil.swap(queue,j,k); z+X DN:
k = j; 5db9C}0
} XXC(R
} )X5en=[)O
private void fixUp(int k) { EALgBv>#ZL
while (k > 1) { (zhi/>suG
int j = k >> 1; wj|[a,(r
if (queue[j]>queue[k]) q|kkdK|N/Y
break; H1a<&7
SortUtil.swap(queue,j,k); mW_ N-z
k = j; QxeK-x^
} #B8V2_M
} 8?&!@3n
fz`\-"f]
} PVX23y;
(-esUOB.
} 2JLXDkZ
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SortUtil： 8eZ^)9m
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package org.rut.util.algorithm; nfA#d-
`Y.Q{5Y
import org.rut.util.algorithm.support.BubbleSort; *N3X"2X:
import org.rut.util.algorithm.support.HeapSort; c_)lTI4
import org.rut.util.algorithm.support.ImprovedMergeSort; %$}*y
import org.rut.util.algorithm.support.ImprovedQuickSort; bs\7 juHt
import org.rut.util.algorithm.support.InsertSort; >e9xM Gv
import org.rut.util.algorithm.support.MergeSort; S_Ug=8r4
import org.rut.util.algorithm.support.QuickSort; h-=lZ~W~
import org.rut.util.algorithm.support.SelectionSort; 1g bqHxWI
import org.rut.util.algorithm.support.ShellSort; Yb Dz{m
ul[+vpH9
/** a^.5cJ$]
* @author treeroot GN@(!V#/4
* @since 2006-2-2 br_D Orq|
* @version 1.0 o~={M7m
*/ <jHo2U8/"s
public class SortUtil { 9ZXEy }q57
public final static int INSERT = 1; B3-;]6
public final static int BUBBLE = 2; q8P$Md-=b1
public final static int SELECTION = 3; #ybtjsu'"U
public final static int SHELL = 4; )|CF)T-
public final static int QUICK = 5; w} 1~
public final static int IMPROVED_QUICK = 6; sU 5/c|&
public final static int MERGE = 7; ^Yu%JCN8g
public final static int IMPROVED_MERGE = 8; y759S)U>>p
public final static int HEAP = 9; O'~;|-Z<
KL6FmL)HH
public static void sort(int[] data) { |XoW Z,K
sort(data, IMPROVED_QUICK); z2Rg`1B
} ={gfx;
private static String[] name={ NY9\a[[^[8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cR"?EQ] `N
}; C lekB
V [KFZSA
private static Sort[] impl=new Sort[]{ '+*{u]\
new InsertSort(), 95^A !
new BubbleSort(), +YK/^;Th
new SelectionSort(), y0f"UH/
new ShellSort(), ^YwTO/Q|
new QuickSort(), ^i!6q9<{e
new ImprovedQuickSort(), 1T@#gE["Ic
new MergeSort(), z6f N)kw
new ImprovedMergeSort(), *aT\V64
new HeapSort() 2%*mL98WK
}; N56/\1R
U";8zplU
public static String toString(int algorithm){ )T26cT$
return name[algorithm-1]; I#U"DwM
} .PJCBTe
9et%Hn.K'
public static void sort(int[] data, int algorithm) { qH1&tW$
impl[algorithm-1].sort(data); iR(jCD?) Y
} ]E!b&
,U^V]jC
public static interface Sort { uF89B-t
public void sort(int[] data); B%Vz -t
} ROc)LCA
xvx+a0 A
public static void swap(int[] data, int i, int j) { Q5~Y;0'
int temp = data; P>s3Rh3:
data = data[j]; s2rwFj8 |
data[j] = temp; 9pJk.Np0
} o@!Uds0
} ~M!s0jT