[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; =:H-9
} =U]9>
int i1=l; CTIS}_CWd=
int i2=mid+1; LV:L0D7y
for(int cur=l;cur<=r;cur++){ q0.!T0i
if(i1==mid+1) ;_<~9;
data[cur]=temp[i2++]; tOIqX0dWd
else if(i2>r) Qit&cnO
data[cur]=temp[i1++]; _.5{vGyxr
else if(temp[i1] data[cur]=temp[i1++]; H*=cw<
else G6G Bqp6|
data[cur]=temp[i2++]; Rl?1|$%
} %2QGbnt_*
} :?M_U;;z2+
<ToS&
} !0;AFv`\
m{IlRf'
改进后的归并排序: ~+Wx\:TT
;K<VT\
package org.rut.util.algorithm.support; K=gg<E<
f_~T
import org.rut.util.algorithm.SortUtil; TU|#Pz7n-Z
+~8Lc'0aA
/** g}_2T\$k
* @author treeroot ]IuZT
* @since 2006-2-2 1eI*.pt
* @version 1.0 zluq2r
*/ 4|x_C-@
public class ImprovedMergeSort implements SortUtil.Sort { /YJo"\7
2S8;=x}/
private static final int THRESHOLD = 10; a\P:jgF
W@R7CQE@
/* |"*P`C=
* (non-Javadoc) $ve$Sq
* F`(;@LO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '73}{" '
*/ !Icznou\
public void sort(int[] data) { fl9VokAT
int[] temp=new int[data.length]; Otq1CD9
mergeSort(data,temp,0,data.length-1); aj .7t=^
} 4oryTckS
T \- x3i
private void mergeSort(int[] data, int[] temp, int l, int r) { QkD]9#Id&
int i, j, k; N=T}
int mid = (l + r) / 2; vUO[V$rx
if (l == r) }2m>S6""A
return; 8f)pf$v`
if ((mid - l) >= THRESHOLD) Le bc@,
mergeSort(data, temp, l, mid); ;qbK[3.
else (.YSs
insertSort(data, l, mid - l + 1); _nxu8g]
if ((r - mid) > THRESHOLD) xt"-Jmox
mergeSort(data, temp, mid + 1, r); QLHEzEvf{/
else iCh8e>+
insertSort(data, mid + 1, r - mid); O<,\tZ'N
y\-iGKz{0
for (i = l; i <= mid; i++) { Ik5V?
temp = data; zzo93d
} `Je1$)%
for (j = 1; j <= r - mid; j++) { S<'_{uz
temp[r - j + 1] = data[j + mid]; ;XjXv'
} `r3 klL,W'
int a = temp[l]; R~[~(`/S
int b = temp[r]; JgKhrDx
for (i = l, j = r, k = l; k <= r; k++) { S0:Oep
if (a < b) { 2P@6Qe ?
data[k] = temp[i++]; ,mi7WW9
a = temp; VGxab;#,:3
} else { cwtlOg
data[k] = temp[j--]; `T7TWv"M
b = temp[j]; L{)t(H>O
} o.Y6(o
} =ePX^J*M'
} wxPl[)E
\*b .f
/** '!?t+L%gO
* @param data /7p(%vr
* @param l xWK/uE(
* @param i 9Hb|$/FD
*/ |42;171
private void insertSort(int[] data, int start, int len) { Q{'4,J-w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _JTK$\
} } snS~kx
} ]SPuNBsy)
} h7TkMt[l
} JhTr{8{
)8aHj4x
堆排序： -%%Xx5D
W+U0Y,N6
package org.rut.util.algorithm.support; s3Zt)xQ3
e"bzZ!c&~V
import org.rut.util.algorithm.SortUtil; B)L0hi
*_#2|96)
/** [uHC AP
* @author treeroot =2QP7W3mg<
* @since 2006-2-2 &.s.g\
* @version 1.0 BOcD?rrZ0
*/ 3RvDX p
public class HeapSort implements SortUtil.Sort{ +TaxH;
U:3OE97
/* (non-Javadoc) PUZcb+%]h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +r;t]
*/ =2=rPZw9
public void sort(int[] data) { Kz/,V6H:
MaxHeap h=new MaxHeap(); K{`R`SXD
h.init(data); }S?"mg&V
for(int i=0;i h.remove(); qz3 Z'
System.arraycopy(h.queue,1,data,0,data.length); ,c?( |tF
} zn&ZXFgN
LW.j)wB]
private static class MaxHeap{ /je $+
zy"k b
void init(int[] data){ .`*]nN{
this.queue=new int[data.length+1]; aT}Hc5L,b
for(int i=0;i queue[++size]=data; @H4]Gp ]
fixUp(size); yFb"2
} -LUZ7,!/>o
} } S]!W\a
\-[bU6\A\
private int size=0; W}3%BWn
hxM{}}.E
private int[] queue; B&B:P
^dhx/e%s
public int get() { x0ipk}
return queue[1]; p}pd&ut1
} A s}L=2
y?O-h1"3,
public void remove() { U!uJ)mm
SortUtil.swap(queue,1,size--); "!AtS
fixDown(1); !uIY,
} $%"hhju
file://fixdown cb0rkmO
private void fixDown(int k) { +75"Q:I
int j; ^0}wmxDq
while ((j = k << 1) <= size) { 0#8, (6
if (j < size %26amp;%26amp; queue[j] j++; a:UkVK]MP
if (queue[k]>queue[j]) file://不用交换 ^p9V5o
break; )[ZXPD
SortUtil.swap(queue,j,k); p_&B+ <z
k = j; rCczQ71W
} ]u$tKC
} MD<x{7O12>
private void fixUp(int k) { U!c+i#:t
while (k > 1) { <\Y(+?+uZ
int j = k >> 1; >Ovz;
if (queue[j]>queue[k]) ^AJ 2Y_}v
break; }s@IQay+
SortUtil.swap(queue,j,k); ?6&G:Uz/
k = j; I(7iD. ^:
} p!=8Pq.
} ;}U]^LT=
xZ`vcS(
} HpIi-Es7C
':_gYA
} Yu_ eCq5/
JBJ?|}5k4c
SortUtil： G;u~H<
U_gkO;s%
package org.rut.util.algorithm; =EA @
rKslgZhQ
import org.rut.util.algorithm.support.BubbleSort; Cu24xP`
import org.rut.util.algorithm.support.HeapSort; dnwzf=+>e
import org.rut.util.algorithm.support.ImprovedMergeSort; OGJrwl
import org.rut.util.algorithm.support.ImprovedQuickSort; 2W_[|.;'
import org.rut.util.algorithm.support.InsertSort; Q#ksf h!D
import org.rut.util.algorithm.support.MergeSort; ps,Kj3^T<
import org.rut.util.algorithm.support.QuickSort; k{F6WQ7
import org.rut.util.algorithm.support.SelectionSort; i>CR{q
import org.rut.util.algorithm.support.ShellSort; sg}<()
1EQ:@1
/** <zvtQ^{]
* @author treeroot s91[DT4
* @since 2006-2-2 t5K#nRd Z:
* @version 1.0 vShB26b
*/ A=|a!N/
public class SortUtil { $t"QLsk0
public final static int INSERT = 1; x$TLj
public final static int BUBBLE = 2; d$+0;D4E
public final static int SELECTION = 3; 3PRU
public final static int SHELL = 4; ~-lUS0duh
public final static int QUICK = 5; AU%Yr6
public final static int IMPROVED_QUICK = 6; 'w72i/
public final static int MERGE = 7; o(l%k},a
public final static int IMPROVED_MERGE = 8; P~:^bU^F7
public final static int HEAP = 9; $J)`Ru6.
yW7>5r
public static void sort(int[] data) { ,d_rK\J
sort(data, IMPROVED_QUICK); gjnEN1T22
} 4K`b?{){+a
private static String[] name={ eUCBQK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Th\T$T`X$
}; iRG6Cw2
4A(h'(^7A
private static Sort[] impl=new Sort[]{ i-4L{T\K
new InsertSort(), hDUU_.q)D
new BubbleSort(), -:45Q{u/
new SelectionSort(), ?^7X2 u$nm
new ShellSort(), |)%H_TXTy
new QuickSort(), 0 .T5% _/
new ImprovedQuickSort(), .Sa=VC?EZ
new MergeSort(), S-Vxlku]
new ImprovedMergeSort(), y>u|3:z
new HeapSort() ' \>k7?@
}; x.|sCqx
eUR+j?5I
public static String toString(int algorithm){ })(robBkA
return name[algorithm-1]; t*Z5{
} "66#F
gy|o#&e]%
public static void sort(int[] data, int algorithm) { +`B^D
impl[algorithm-1].sort(data); !SGRK01
} DOkuT/+
$X\2h+ Os
public static interface Sort { NzM,0q
public void sort(int[] data); yqtHlz%
} Jx`7W1%T
2* TIr
public static void swap(int[] data, int i, int j) { 6jm/y@|F!
int temp = data; P;'ZdZ(SLu
data = data[j]; tBl(E
data[j] = temp; uocFOlU0n
} [fvjvN`
} e6{E(=R[M