[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; 6Bn%7ZBv
} aj@<4A=;
int i1=l; j\@osjUu
int i2=mid+1; 'mU7N<Q$qQ
for(int cur=l;cur<=r;cur++){ ,L9ioYbp
if(i1==mid+1) 9|1J pb
data[cur]=temp[i2++]; *WZ?C|6+
else if(i2>r) IRB BLXv7\
data[cur]=temp[i1++]; }C9P--
else if(temp[i1] data[cur]=temp[i1++]; g)Dg=3+>
else Sv|jR r'
data[cur]=temp[i2++]; /WJ+e
} R7~#7qKQB
} X1~ WQ?ww
k5]`:k6
} FW--|X]8
qQx5n
改进后的归并排序: yOXL19d@p_
n6s[q-td
package org.rut.util.algorithm.support; k&SI-jxj
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import org.rut.util.algorithm.SortUtil; x^P~+(g
S 0L"5B@
/** 0dKi25J
* @author treeroot *Z C$DW!-
* @since 2006-2-2 Hlye:.$
* @version 1.0 KJ;NcUq
*/ bO\E)%zp
public class ImprovedMergeSort implements SortUtil.Sort { a>XlkkX
T9=55tpG9
private static final int THRESHOLD = 10; m*Q*{M_e
bf1EMai"
/* ^=V b'g3P~
* (non-Javadoc) P gK> Z,
* (n3MbVi3LU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mj9r#v3.
*/ NoG`J$D
public void sort(int[] data) { z;d]=PT
int[] temp=new int[data.length]; h,%b>JFo
mergeSort(data,temp,0,data.length-1); r&?i>.Kz8
} {m2lVzK
sJq^>"|J
private void mergeSort(int[] data, int[] temp, int l, int r) { RbGq$vYol/
int i, j, k; &['cZ/bM
int mid = (l + r) / 2; -cW'g
if (l == r) dpWBY3(7a
return; l/F'W}
if ((mid - l) >= THRESHOLD) B2DWSp-8*
mergeSort(data, temp, l, mid); (:ObxJ*
else @#= ail
insertSort(data, l, mid - l + 1); ^J{tOxO=l
if ((r - mid) > THRESHOLD) 1pT-PO3=
mergeSort(data, temp, mid + 1, r); P]b *hC
else An0Zg'o!G
insertSort(data, mid + 1, r - mid); qe"t0w|U?
+X&b
for (i = l; i <= mid; i++) { Zr U9oy&!C
temp = data; ?*h2:a$
} &mJ +#vT
for (j = 1; j <= r - mid; j++) { h8me.=S&
temp[r - j + 1] = data[j + mid]; WC<K(PP
} uw,p\:D&
int a = temp[l]; GN%|'eU
int b = temp[r]; [h^>Iq (Z
for (i = l, j = r, k = l; k <= r; k++) { DsZBhjCB
if (a < b) { a= *qsgPGL
data[k] = temp[i++]; e;ej/)no`
a = temp; ="*:H)
} else { i1E~F
data[k] = temp[j--]; JTn\NSa
b = temp[j]; x."/+/
} bO2s'!x
} ohPCYt
} ]~H\X":[>
D3BT>zTGK
/** d5O_~xf&
* @param data IxQ(g#sj_k
* @param l =A< Fcl\Rz
* @param i eub2[,
*/ 'ixu+.ZL/
private void insertSort(int[] data, int start, int len) { VkChRzhC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1>"[b8a/
} jjLwHJ
} h &R1"
} s v}o%
} eAPNF?0yh
CCQ38P@rv
堆排序： a\BV%'Zqg
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package org.rut.util.algorithm.support; 8r46Wr7Q
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import org.rut.util.algorithm.SortUtil; @ppT;9<d
VX<jg#(
/** -4!9cE
* @author treeroot ZFNn(n
* @since 2006-2-2 >.)m|,
* @version 1.0 :g`j gn0
*/ 9AgTrP
public class HeapSort implements SortUtil.Sort{ X>W2aDuEZ
h/a|-V}m&
/* (non-Javadoc) -~'{WSJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #rkz:ir4
*/ 2Vn~o_ga
public void sort(int[] data) { n8dJ6"L<"
MaxHeap h=new MaxHeap(); >ARZ=x[
h.init(data); +KzbaBK
for(int i=0;i h.remove(); `,O#r0m
System.arraycopy(h.queue,1,data,0,data.length); c6@7>PM
} %gb4(~E+N
(WISf}[l;
private static class MaxHeap{ z9B""ws
bkvm-$/
void init(int[] data){ ^-&BGQM
this.queue=new int[data.length+1]; PS=N]e7k'
for(int i=0;i queue[++size]=data; 8wXnc%
fixUp(size); WX9ABh&5
} -xXz}2S4
} :47bf<w|Y
@*VfG CQ(
private int size=0; Z@G[\"
TJY [s-
private int[] queue; @g{FNXY$m
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public int get() { Q2L>P<87T
return queue[1]; EL?6x
} h'tb
&O:IRR7p
public void remove() { Yi5^#G
SortUtil.swap(queue,1,size--); Gz,?e]ZV
fixDown(1); eq!>~: #
} >$RQ
file://fixdown 5S EyAhB
private void fixDown(int k) { m);0sb
int j; iW #|N^
while ((j = k << 1) <= size) { !d)Vr5x
if (j < size %26amp;%26amp; queue[j] j++; rEF0A&5
if (queue[k]>queue[j]) file://不用交换 a^ __Z3g,
break; :Q=tGj\G
SortUtil.swap(queue,j,k); lzE{e6
k = j; T|%pvTIe
} [@&0@/s*t'
} 6Kbc:wlR
private void fixUp(int k) { h|T_ k
while (k > 1) { %tOGs80_{
int j = k >> 1; C;UqLMrOI
if (queue[j]>queue[k]) LrGLIt`
break; =sYUzYm
SortUtil.swap(queue,j,k); `Q@w*ta)
k = j; .T63:
} 5vmc'Om
} sgGXj7
$\w<.)"#
} <Pm!#)-g9
b:M1P&R
} 5p}ri,Y<
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SortUtil： @BfJb[A#
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package org.rut.util.algorithm; I0qSx{K
0'QX*xfa>
import org.rut.util.algorithm.support.BubbleSort; d5z=fH9
import org.rut.util.algorithm.support.HeapSort; <?>1eU%
import org.rut.util.algorithm.support.ImprovedMergeSort; nc2=S^Fqu
import org.rut.util.algorithm.support.ImprovedQuickSort; 9*&c2jh
import org.rut.util.algorithm.support.InsertSort; /TndB7l"3
import org.rut.util.algorithm.support.MergeSort; [XKudw%
import org.rut.util.algorithm.support.QuickSort; t4P`#,:8
import org.rut.util.algorithm.support.SelectionSort; xk:=.Qqh
import org.rut.util.algorithm.support.ShellSort; 'e(]woe
T)Zef
/** ' a>YcOw
* @author treeroot V`WSZ
* @since 2006-2-2 cs]h+yE
* @version 1.0 pK|~G."6e
*/ I,lX;~xb
public class SortUtil { u^4$<fd
public final static int INSERT = 1; (2J\o
public final static int BUBBLE = 2; JqmxS*_P
public final static int SELECTION = 3; n6xJ
public final static int SHELL = 4; ]<xzCPB
public final static int QUICK = 5; B@ xjwBUk
public final static int IMPROVED_QUICK = 6; RDSkFK( D
public final static int MERGE = 7; {O=PVW2S
public final static int IMPROVED_MERGE = 8; #aua6V!"
public final static int HEAP = 9; 1 O?bT,"b
QhJuH_f 0
public static void sort(int[] data) { B4Fuvi
sort(data, IMPROVED_QUICK); J85S'cwZZ
} 0Xw$l3@N^
private static String[] name={ T2ZB(B D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Dx5X6t9=
}; +e87/\5
4aGVIQ
private static Sort[] impl=new Sort[]{ dHsI<:T#
new InsertSort(), nf0]<x2
new BubbleSort(), \V_Tc`
new SelectionSort(), hjgB[ &U>
new ShellSort(), W<@9ndvH
new QuickSort(), Ht"?ajW{
new ImprovedQuickSort(), \:m1{+l
new MergeSort(), KPrH1 [VU
new ImprovedMergeSort(), _qO'(DKylC
new HeapSort() Tpd|+60g
}; qI%X/'
Z_h-5VU-
public static String toString(int algorithm){ j2RdBoCt
return name[algorithm-1]; 0sA+5*mdM
} KSAE!+
;I/ A8<C
public static void sort(int[] data, int algorithm) { I'E7mb<2
impl[algorithm-1].sort(data); {ew; /;
} 4o<rj4G>
#I"s{*
public static interface Sort { _M) G
public void sort(int[] data); 2j;9USZ p
} F;L8FL-
'N3)>!Y:8
public static void swap(int[] data, int i, int j) { b]b+PK*h
int temp = data; ~JS BZ@
data = data[j]; h5Ee*De
data[j] = temp; 6Qk[TL)t
} l86gs6>
} DS1{~_>nFu